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https://github.com/facebookresearch/pytorch3d.git
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9aaba0483c
Summary: A triangle is culled if any vertex in a triangle is behind the camera. This fixes incorrect rendering of triangles that are partially behind the camera, where screen coordinate calculations are strange. It doesn't work for triangles that are partially behind the camera but still intersect with the view frustum. Reviewed By: nikhilaravi Differential Revision: D22856181 fbshipit-source-id: a9cbaa1327d89601b83d0dfd3e4a04f934a4a213
1207 lines
52 KiB
Python
1207 lines
52 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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import functools
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import unittest
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import torch
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from common_testing import TestCaseMixin, get_random_cuda_device
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from pytorch3d import _C
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from pytorch3d.renderer.mesh.rasterize_meshes import (
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rasterize_meshes,
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rasterize_meshes_python,
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)
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from pytorch3d.renderer.mesh.utils import (
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_clip_barycentric_coordinates,
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_interpolate_zbuf,
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)
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from pytorch3d.structures import Meshes
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from pytorch3d.utils import ico_sphere
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class TestRasterizeMeshes(TestCaseMixin, unittest.TestCase):
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def test_simple_python(self):
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device = torch.device("cpu")
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self._simple_triangle_raster(rasterize_meshes_python, device, bin_size=-1)
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self._simple_blurry_raster(rasterize_meshes_python, device, bin_size=-1)
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self._test_behind_camera(rasterize_meshes_python, device, bin_size=-1)
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self._test_perspective_correct(rasterize_meshes_python, device, bin_size=-1)
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self._test_barycentric_clipping(rasterize_meshes_python, device, bin_size=-1)
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self._test_back_face_culling(rasterize_meshes_python, device, bin_size=-1)
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def test_simple_cpu_naive(self):
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device = torch.device("cpu")
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self._simple_triangle_raster(rasterize_meshes, device, bin_size=0)
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self._simple_blurry_raster(rasterize_meshes, device, bin_size=0)
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self._test_behind_camera(rasterize_meshes, device, bin_size=0)
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self._test_perspective_correct(rasterize_meshes, device, bin_size=0)
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self._test_back_face_culling(rasterize_meshes, device, bin_size=0)
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def test_simple_cuda_naive(self):
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device = get_random_cuda_device()
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self._simple_triangle_raster(rasterize_meshes, device, bin_size=0)
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self._simple_blurry_raster(rasterize_meshes, device, bin_size=0)
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self._test_behind_camera(rasterize_meshes, device, bin_size=0)
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self._test_perspective_correct(rasterize_meshes, device, bin_size=0)
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self._test_back_face_culling(rasterize_meshes, device, bin_size=0)
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def test_simple_cuda_binned(self):
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device = get_random_cuda_device()
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self._simple_triangle_raster(rasterize_meshes, device, bin_size=5)
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self._simple_blurry_raster(rasterize_meshes, device, bin_size=5)
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self._test_behind_camera(rasterize_meshes, device, bin_size=5)
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self._test_perspective_correct(rasterize_meshes, device, bin_size=5)
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self._test_back_face_culling(rasterize_meshes, device, bin_size=5)
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def test_python_vs_cpu_vs_cuda(self):
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torch.manual_seed(231)
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device = torch.device("cpu")
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image_size = 32
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blur_radius = 0.1 ** 2
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faces_per_pixel = 3
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for d in ["cpu", get_random_cuda_device()]:
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device = torch.device(d)
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compare_grads = True
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# Mesh with a single face.
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verts1 = torch.tensor(
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[[0.0, 0.6, 0.1], [-0.7, -0.4, 0.5], [0.7, -0.4, 0.7]],
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dtype=torch.float32,
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requires_grad=True,
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device=device,
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)
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faces1 = torch.tensor([[0, 1, 2]], dtype=torch.int64, device=device)
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meshes1 = Meshes(verts=[verts1], faces=[faces1])
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args1 = (meshes1, image_size, blur_radius, faces_per_pixel)
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verts2 = verts1.detach().clone()
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verts2.requires_grad = True
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meshes2 = Meshes(verts=[verts2], faces=[faces1])
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args2 = (meshes2, image_size, blur_radius, faces_per_pixel)
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self._compare_impls(
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rasterize_meshes_python,
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rasterize_meshes,
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args1,
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args2,
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verts1,
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verts2,
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compare_grads=compare_grads,
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)
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# Mesh with multiple faces.
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# fmt: off
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verts1 = torch.tensor(
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[
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[ -0.5, 0.0, 0.1], # noqa: E241, E201
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[ 0.0, 0.6, 0.5], # noqa: E241, E201
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[ 0.5, 0.0, 0.7], # noqa: E241, E201
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[-0.25, 0.0, 0.9], # noqa: E241, E201
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[ 0.26, 0.5, 0.8], # noqa: E241, E201
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[ 0.76, 0.0, 0.8], # noqa: E241, E201
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[-0.41, 0.0, 0.5], # noqa: E241, E201
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[ 0.61, 0.6, 0.6], # noqa: E241, E201
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[ 0.41, 0.0, 0.5], # noqa: E241, E201
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[ -0.2, 0.0, -0.5], # noqa: E241, E201
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[ 0.3, 0.6, -0.5], # noqa: E241, E201
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[ 0.4, 0.0, -0.5], # noqa: E241, E201
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],
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dtype=torch.float32,
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device=device,
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requires_grad=True
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)
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faces1 = torch.tensor(
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[
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[ 1, 0, 2], # noqa: E241, E201
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[ 4, 3, 5], # noqa: E241, E201
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[ 7, 6, 8], # noqa: E241, E201
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[10, 9, 11] # noqa: E241, E201
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],
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dtype=torch.int64,
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device=device,
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)
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# fmt: on
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meshes = Meshes(verts=[verts1], faces=[faces1])
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args1 = (meshes, image_size, blur_radius, faces_per_pixel)
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verts2 = verts1.clone().detach()
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verts2.requires_grad = True
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meshes2 = Meshes(verts=[verts2], faces=[faces1])
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args2 = (meshes2, image_size, blur_radius, faces_per_pixel)
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self._compare_impls(
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rasterize_meshes_python,
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rasterize_meshes,
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args1,
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args2,
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verts1,
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verts2,
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compare_grads=compare_grads,
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)
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# Icosphere
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meshes = ico_sphere(device=device)
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verts1, faces1 = meshes.get_mesh_verts_faces(0)
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verts1.requires_grad = True
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meshes = Meshes(verts=[verts1], faces=[faces1])
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args1 = (meshes, image_size, blur_radius, faces_per_pixel)
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verts2 = verts1.detach().clone()
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verts2.requires_grad = True
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meshes2 = Meshes(verts=[verts2], faces=[faces1])
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args2 = (meshes2, image_size, blur_radius, faces_per_pixel)
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self._compare_impls(
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rasterize_meshes_python,
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rasterize_meshes,
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args1,
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args2,
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verts1,
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verts2,
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compare_grads=compare_grads,
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)
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def test_cpu_vs_cuda_naive(self):
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"""
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Compare naive versions of cuda and cpp
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"""
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torch.manual_seed(231)
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image_size = 64
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radius = 0.1 ** 2
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faces_per_pixel = 3
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device = torch.device("cpu")
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meshes_cpu = ico_sphere(0, device)
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verts1, faces1 = meshes_cpu.get_mesh_verts_faces(0)
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verts1.requires_grad = True
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meshes_cpu = Meshes(verts=[verts1], faces=[faces1])
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device = get_random_cuda_device()
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meshes_cuda = ico_sphere(0, device)
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verts2, faces2 = meshes_cuda.get_mesh_verts_faces(0)
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verts2.requires_grad = True
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meshes_cuda = Meshes(verts=[verts2], faces=[faces2])
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barycentric_clip = True
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args_cpu = (
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meshes_cpu,
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image_size,
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radius,
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faces_per_pixel,
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None,
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None,
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False,
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barycentric_clip,
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False,
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)
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args_cuda = (
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meshes_cuda,
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image_size,
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radius,
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faces_per_pixel,
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0,
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0,
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False,
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barycentric_clip,
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False,
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)
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self._compare_impls(
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rasterize_meshes,
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rasterize_meshes,
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args_cpu,
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args_cuda,
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verts1,
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verts2,
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compare_grads=True,
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)
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def test_coarse_cpu(self):
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return self._test_coarse_rasterize(torch.device("cpu"))
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def test_coarse_cuda(self):
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return self._test_coarse_rasterize(get_random_cuda_device())
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def test_cpp_vs_cuda_naive_vs_cuda_binned(self):
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# Make sure that the backward pass runs for all pathways
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image_size = 64 # test is too slow for very large images.
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N = 1
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radius = 0.1 ** 2
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faces_per_pixel = 3
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grad_zbuf = torch.randn(N, image_size, image_size, faces_per_pixel)
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grad_dist = torch.randn(N, image_size, image_size, faces_per_pixel)
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grad_bary = torch.randn(N, image_size, image_size, faces_per_pixel, 3)
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device = torch.device("cpu")
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meshes = ico_sphere(0, device)
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verts, faces = meshes.get_mesh_verts_faces(0)
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verts.requires_grad = True
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meshes = Meshes(verts=[verts], faces=[faces])
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# Option I: CPU, naive
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args = (meshes, image_size, radius, faces_per_pixel)
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idx1, zbuf1, bary1, dist1 = rasterize_meshes(*args)
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loss = (
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(zbuf1 * grad_zbuf).sum()
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+ (dist1 * grad_dist).sum()
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+ (bary1 * grad_bary).sum()
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)
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loss.backward()
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idx1 = idx1.data.cpu().clone()
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zbuf1 = zbuf1.data.cpu().clone()
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dist1 = dist1.data.cpu().clone()
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grad1 = verts.grad.data.cpu().clone()
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# Option II: CUDA, naive
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device = get_random_cuda_device()
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meshes = ico_sphere(0, device)
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verts, faces = meshes.get_mesh_verts_faces(0)
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verts.requires_grad = True
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meshes = Meshes(verts=[verts], faces=[faces])
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args = (meshes, image_size, radius, faces_per_pixel, 0, 0)
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idx2, zbuf2, bary2, dist2 = rasterize_meshes(*args)
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grad_zbuf = grad_zbuf.to(device)
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grad_dist = grad_dist.to(device)
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grad_bary = grad_bary.to(device)
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loss = (
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(zbuf2 * grad_zbuf).sum()
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+ (dist2 * grad_dist).sum()
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+ (bary2 * grad_bary).sum()
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)
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loss.backward()
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idx2 = idx2.data.cpu().clone()
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zbuf2 = zbuf2.data.cpu().clone()
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dist2 = dist2.data.cpu().clone()
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grad2 = verts.grad.data.cpu().clone()
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# Option III: CUDA, binned
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meshes = ico_sphere(0, device)
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verts, faces = meshes.get_mesh_verts_faces(0)
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verts.requires_grad = True
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meshes = Meshes(verts=[verts], faces=[faces])
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args = (meshes, image_size, radius, faces_per_pixel, 32, 500)
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idx3, zbuf3, bary3, dist3 = rasterize_meshes(*args)
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loss = (
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(zbuf3 * grad_zbuf).sum()
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+ (dist3 * grad_dist).sum()
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+ (bary3 * grad_bary).sum()
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)
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loss.backward()
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idx3 = idx3.data.cpu().clone()
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zbuf3 = zbuf3.data.cpu().clone()
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dist3 = dist3.data.cpu().clone()
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grad3 = verts.grad.data.cpu().clone()
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# Make sure everything was the same
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self.assertTrue((idx1 == idx2).all().item())
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self.assertTrue((idx1 == idx3).all().item())
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self.assertClose(zbuf1, zbuf2, atol=1e-6)
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self.assertClose(zbuf1, zbuf3, atol=1e-6)
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self.assertClose(dist1, dist2, atol=1e-6)
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self.assertClose(dist1, dist3, atol=1e-6)
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self.assertClose(grad1, grad2, rtol=5e-3) # flaky test
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self.assertClose(grad1, grad3, rtol=5e-3)
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self.assertClose(grad2, grad3, rtol=5e-3)
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def test_compare_coarse_cpu_vs_cuda(self):
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torch.manual_seed(231)
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N = 1
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image_size = 512
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blur_radius = 0.0
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bin_size = 32
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max_faces_per_bin = 20
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device = torch.device("cpu")
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meshes = ico_sphere(2, device)
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faces = meshes.faces_packed()
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verts = meshes.verts_packed()
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faces_verts = verts[faces]
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num_faces_per_mesh = meshes.num_faces_per_mesh()
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mesh_to_face_first_idx = meshes.mesh_to_faces_packed_first_idx()
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bin_faces_cpu = _C._rasterize_meshes_coarse(
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faces_verts,
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mesh_to_face_first_idx,
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num_faces_per_mesh,
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image_size,
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blur_radius,
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bin_size,
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max_faces_per_bin,
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)
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device = get_random_cuda_device()
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meshes = meshes.clone().to(device)
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faces = meshes.faces_packed()
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verts = meshes.verts_packed()
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faces_verts = verts[faces]
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num_faces_per_mesh = meshes.num_faces_per_mesh()
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mesh_to_face_first_idx = meshes.mesh_to_faces_packed_first_idx()
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bin_faces_cuda = _C._rasterize_meshes_coarse(
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faces_verts,
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mesh_to_face_first_idx,
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num_faces_per_mesh,
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image_size,
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blur_radius,
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bin_size,
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max_faces_per_bin,
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)
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# Bin faces might not be the same: CUDA version might write them in
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# any order. But if we sort the non-(-1) elements of the CUDA output
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# then they should be the same.
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for n in range(N):
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for by in range(bin_faces_cpu.shape[1]):
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for bx in range(bin_faces_cpu.shape[2]):
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K = (bin_faces_cuda[n, by, bx] != -1).sum().item()
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idxs_cpu = bin_faces_cpu[n, by, bx].tolist()
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idxs_cuda = bin_faces_cuda[n, by, bx].tolist()
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idxs_cuda[:K] = sorted(idxs_cuda[:K])
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self.assertEqual(idxs_cpu, idxs_cuda)
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def test_python_vs_cpp_bary_clip(self):
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torch.manual_seed(232)
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N = 2
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V = 10
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F = 5
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verts1 = torch.randn(N, V, 3, requires_grad=True)
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verts2 = verts1.detach().clone().requires_grad_(True)
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faces = torch.randint(V, size=(N, F, 3))
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meshes1 = Meshes(verts1, faces)
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meshes2 = Meshes(verts2, faces)
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kwargs = {"image_size": 24, "clip_barycentric_coords": True}
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fn1 = functools.partial(rasterize_meshes, meshes1, **kwargs)
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fn2 = functools.partial(rasterize_meshes_python, meshes2, **kwargs)
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args = ()
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self._compare_impls(fn1, fn2, args, args, verts1, verts2, compare_grads=True)
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def test_cpp_vs_cuda_bary_clip(self):
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meshes = ico_sphere(2, device=torch.device("cpu"))
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verts1, faces1 = meshes.get_mesh_verts_faces(0)
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verts1.requires_grad = True
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meshes1 = Meshes(verts=[verts1], faces=[faces1])
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device = get_random_cuda_device()
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verts2 = verts1.detach().to(device).requires_grad_(True)
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faces2 = faces1.detach().clone().to(device)
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meshes2 = Meshes(verts=[verts2], faces=[faces2])
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kwargs = {"image_size": 64, "clip_barycentric_coords": True}
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fn1 = functools.partial(rasterize_meshes, meshes1, **kwargs)
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fn2 = functools.partial(rasterize_meshes, meshes2, bin_size=0, **kwargs)
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args = ()
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self._compare_impls(fn1, fn2, args, args, verts1, verts2, compare_grads=True)
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def test_python_vs_cpp_perspective_correct(self):
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torch.manual_seed(232)
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N = 2
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V = 10
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F = 5
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verts1 = torch.randn(N, V, 3, requires_grad=True)
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verts2 = verts1.detach().clone().requires_grad_(True)
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faces = torch.randint(V, size=(N, F, 3))
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meshes1 = Meshes(verts1, faces)
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meshes2 = Meshes(verts2, faces)
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kwargs = {"image_size": 24, "perspective_correct": True}
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fn1 = functools.partial(rasterize_meshes, meshes1, **kwargs)
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fn2 = functools.partial(rasterize_meshes_python, meshes2, **kwargs)
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args = ()
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self._compare_impls(fn1, fn2, args, args, verts1, verts2, compare_grads=True)
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def test_cpp_vs_cuda_perspective_correct(self):
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meshes = ico_sphere(2, device=torch.device("cpu"))
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verts1, faces1 = meshes.get_mesh_verts_faces(0)
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verts1.requires_grad = True
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meshes1 = Meshes(verts=[verts1], faces=[faces1])
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device = get_random_cuda_device()
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verts2 = verts1.detach().to(device).requires_grad_(True)
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faces2 = faces1.detach().clone().to(device)
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meshes2 = Meshes(verts=[verts2], faces=[faces2])
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kwargs = {"image_size": 64, "perspective_correct": True}
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fn1 = functools.partial(rasterize_meshes, meshes1, **kwargs)
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fn2 = functools.partial(rasterize_meshes, meshes2, bin_size=0, **kwargs)
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args = ()
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self._compare_impls(fn1, fn2, args, args, verts1, verts2, compare_grads=True)
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|
|
def test_cuda_naive_vs_binned_perspective_correct(self):
|
|
device = get_random_cuda_device()
|
|
meshes = ico_sphere(2, device=device)
|
|
verts1, faces1 = meshes.get_mesh_verts_faces(0)
|
|
verts1.requires_grad = True
|
|
meshes1 = Meshes(verts=[verts1], faces=[faces1])
|
|
verts2 = verts1.detach().clone().requires_grad_(True)
|
|
faces2 = faces1.detach().clone()
|
|
meshes2 = Meshes(verts=[verts2], faces=[faces2])
|
|
|
|
kwargs = {"image_size": 64, "perspective_correct": True}
|
|
fn1 = functools.partial(rasterize_meshes, meshes1, bin_size=0, **kwargs)
|
|
fn2 = functools.partial(rasterize_meshes, meshes2, bin_size=8, **kwargs)
|
|
args = ()
|
|
self._compare_impls(fn1, fn2, args, args, verts1, verts2, compare_grads=True)
|
|
|
|
def test_bin_size_error(self):
|
|
meshes = ico_sphere(2)
|
|
image_size = 1024
|
|
bin_size = 16
|
|
with self.assertRaisesRegex(ValueError, "bin_size too small"):
|
|
rasterize_meshes(meshes, image_size, 0.0, 2, bin_size)
|
|
|
|
def _test_back_face_culling(self, rasterize_meshes_fn, device, bin_size):
|
|
# Square based pyramid mesh.
|
|
# fmt: off
|
|
verts = torch.tensor([
|
|
[-0.5, 0.0, 0.5], # noqa: E241 E201 Front right
|
|
[ 0.5, 0.0, 0.5], # noqa: E241 E201 Front left
|
|
[ 0.5, 0.0, 1.5], # noqa: E241 E201 Back left
|
|
[-0.5, 0.0, 1.5], # noqa: E241 E201 Back right
|
|
[ 0.0, 1.0, 1.0] # noqa: E241 E201 Top point of pyramid
|
|
], dtype=torch.float32, device=device)
|
|
|
|
faces = torch.tensor([
|
|
[2, 1, 0], # noqa: E241 E201 Square base
|
|
[3, 2, 0], # noqa: E241 E201 Square base
|
|
[1, 0, 4], # noqa: E241 E201 Triangle on front
|
|
[2, 4, 3], # noqa: E241 E201 Triangle on back
|
|
[3, 4, 0], # noqa: E241 E201 Triangle on left side
|
|
[1, 4, 2] # noqa: E241 E201 Triangle on right side
|
|
], dtype=torch.int64, device=device)
|
|
# fmt: on
|
|
mesh = Meshes(verts=[verts], faces=[faces])
|
|
kwargs = {
|
|
"meshes": mesh,
|
|
"image_size": 10,
|
|
"faces_per_pixel": 2,
|
|
"blur_radius": 0.0,
|
|
"perspective_correct": False,
|
|
"cull_backfaces": False,
|
|
}
|
|
if bin_size != -1:
|
|
kwargs["bin_size"] = bin_size
|
|
|
|
# fmt: off
|
|
pix_to_face_frontface = torch.tensor([
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, 2, 2, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, 2, 2, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, 2, 2, 2, 2, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, 2, 2, 2, 2, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241 E201
|
|
], dtype=torch.int64, device=device)
|
|
pix_to_face_backface = torch.tensor([
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, 3, 3, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, 3, 3, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, 3, 3, 3, 3, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, 3, 3, 3, 3, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241 E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241 E201
|
|
], dtype=torch.int64, device=device)
|
|
# fmt: on
|
|
|
|
pix_to_face_padded = -(torch.ones_like(pix_to_face_frontface))
|
|
# Run with and without culling
|
|
# Without culling, for k=0, the front face (i.e. face 2) is
|
|
# rasterized and for k=1, the back face (i.e. face 3) is
|
|
# rasterized.
|
|
idx_f, zbuf_f, bary_f, dists_f = rasterize_meshes_fn(**kwargs)
|
|
self.assertTrue(torch.all(idx_f[..., 0].squeeze() == pix_to_face_frontface))
|
|
self.assertTrue(torch.all(idx_f[..., 1].squeeze() == pix_to_face_backface))
|
|
|
|
# With culling, for k=0, the front face (i.e. face 2) is
|
|
# rasterized and for k=1, there are no faces rasterized
|
|
kwargs["cull_backfaces"] = True
|
|
idx_t, zbuf_t, bary_t, dists_t = rasterize_meshes_fn(**kwargs)
|
|
self.assertTrue(torch.all(idx_t[..., 0].squeeze() == pix_to_face_frontface))
|
|
self.assertTrue(torch.all(idx_t[..., 1].squeeze() == pix_to_face_padded))
|
|
|
|
def _compare_impls(
|
|
self,
|
|
fn1,
|
|
fn2,
|
|
args1,
|
|
args2,
|
|
grad_var1=None,
|
|
grad_var2=None,
|
|
compare_grads=False,
|
|
):
|
|
idx1, zbuf1, bary1, dist1 = fn1(*args1)
|
|
idx2, zbuf2, bary2, dist2 = fn2(*args2)
|
|
self.assertTrue((idx1.cpu() == idx2.cpu()).all().item())
|
|
self.assertClose(zbuf1.cpu(), zbuf2.cpu(), rtol=1e-4)
|
|
self.assertClose(dist1.cpu(), dist2.cpu(), rtol=6e-3)
|
|
self.assertClose(bary1.cpu(), bary2.cpu(), rtol=1e-3)
|
|
if not compare_grads:
|
|
return
|
|
|
|
# Compare gradients.
|
|
torch.manual_seed(231)
|
|
grad_zbuf = torch.randn_like(zbuf1)
|
|
grad_dist = torch.randn_like(dist1)
|
|
grad_bary = torch.randn_like(bary1)
|
|
loss1 = (
|
|
(dist1 * grad_dist).sum()
|
|
+ (zbuf1 * grad_zbuf).sum()
|
|
+ (bary1 * grad_bary).sum()
|
|
)
|
|
|
|
# avoid gradient error if rasterize_meshes_python() culls all triangles
|
|
loss1 += grad_var1.sum() * 0.0
|
|
|
|
loss1.backward()
|
|
grad_verts1 = grad_var1.grad.data.clone().cpu()
|
|
|
|
grad_zbuf = grad_zbuf.to(zbuf2)
|
|
grad_dist = grad_dist.to(dist2)
|
|
grad_bary = grad_bary.to(bary2)
|
|
loss2 = (
|
|
(dist2 * grad_dist).sum()
|
|
+ (zbuf2 * grad_zbuf).sum()
|
|
+ (bary2 * grad_bary).sum()
|
|
)
|
|
|
|
# avoid gradient error if rasterize_meshes_python() culls all triangles
|
|
loss2 += grad_var2.sum() * 0.0
|
|
|
|
grad_var1.grad.data.zero_()
|
|
loss2.backward()
|
|
grad_verts2 = grad_var2.grad.data.clone().cpu()
|
|
self.assertClose(grad_verts1, grad_verts2, rtol=2e-3)
|
|
|
|
def _test_perspective_correct(self, rasterize_meshes_fn, device, bin_size=None):
|
|
# fmt: off
|
|
verts = torch.tensor([
|
|
[-0.4, -0.4, 10], # noqa: E241, E201
|
|
[ 0.4, -0.4, 10], # noqa: E241, E201
|
|
[ 0.0, 0.4, 20], # noqa: E241, E201
|
|
], dtype=torch.float32, device=device)
|
|
# fmt: on
|
|
faces = torch.tensor([[0, 1, 2]], device=device)
|
|
meshes = Meshes(verts=[verts], faces=[faces])
|
|
kwargs = {
|
|
"meshes": meshes,
|
|
"image_size": 11,
|
|
"faces_per_pixel": 1,
|
|
"blur_radius": 0.2,
|
|
"perspective_correct": False,
|
|
}
|
|
if bin_size != -1:
|
|
kwargs["bin_size"] = bin_size
|
|
|
|
# Run with and without perspective correction
|
|
idx_f, zbuf_f, bary_f, dists_f = rasterize_meshes_fn(**kwargs)
|
|
|
|
kwargs["perspective_correct"] = True
|
|
idx_t, zbuf_t, bary_t, dists_t = rasterize_meshes_fn(**kwargs)
|
|
|
|
# Expected output tensors in the format with axes +X left, +Y up, +Z in
|
|
# idx and dists should be the same with or without perspecitve correction
|
|
# fmt: off
|
|
idx_expected = torch.tensor([
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0, 0, 0, 0, 0, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0, 0, 0, 0, 0, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 0, 0, 0, 0, 0, 0, 0, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 0, 0, 0, 0, 0, 0, 0, -1, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1], # noqa: E241, E201
|
|
[-1, -1, 0, 0, 0, 0, 0, 0, 0, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241, E201
|
|
], dtype=torch.int64, device=device).view(1, 11, 11, 1)
|
|
|
|
dists_expected = torch.tensor([
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., 0.1402, 0.1071, 0.1402, -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., - 1., 0.1523, 0.0542, 0.0212, 0.0542, 0.1523, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 0.0955, 0.0214, -0.0003, 0.0214, 0.0955, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 0.1523, 0.0518, 0.0042, -0.0095, 0.0042, 0.0518, 0.1523, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 0.0955, 0.0214, -0.0003, -0.032, -0.0003, 0.0214, 0.0955, -1., -1.], # noqa: E241, E201
|
|
[-1., 0.1523, 0.0518, 0.0042, -0.0095, -0.0476, -0.0095, 0.0042, 0.0518, 0.1523, -1.], # noqa: E241, E201
|
|
[-1., 0.1084, 0.0225, -0.0003, -0.0013, -0.0013, -0.0013, -0.0003, 0.0225, 0.1084, -1.], # noqa: E241, E201
|
|
[-1., 0.1283, 0.0423, 0.0212, 0.0212, 0.0212, 0.0212, 0.0212, 0.0423, 0.1283, -1.], # noqa: E241, E201
|
|
[-1., -1., 0.1283, 0.1071, 0.1071, 0.1071, 0.1071, 0.1071, 0.1283, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.] # noqa: E241, E201
|
|
], dtype=torch.float32, device=device).view(1, 11, 11, 1)
|
|
|
|
# zbuf and barycentric will be different with perspective correction
|
|
zbuf_f_expected = torch.tensor([
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., 24.0909, 24.0909, 24.0909, -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 21.8182, 21.8182, 21.8182, 21.8182, 21.8182, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 19.5455, 19.5455, 19.5455, 19.5455, 19.5455, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 17.2727, 17.2727, 17.2727, 17.2727, 17.2727, 17.2727, 17.2727, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 15., 15., 15., 15., 15., 15., 15., -1., -1.], # noqa: E241, E201
|
|
[-1., 12.7273, 12.7273, 12.7273, 12.7273, 12.7273, 12.7273, 12.7273, 12.7273, 12.7273, -1.], # noqa: E241, E201
|
|
[-1., 10.4545, 10.4545, 10.4545, 10.4545, 10.4545, 10.4545, 10.4545, 10.4545, 10.4545, -1.], # noqa: E241, E201
|
|
[-1., 8.1818, 8.1818, 8.1818, 8.1818, 8.1818, 8.1818, 8.1818, 8.1818, 8.1818, -1.], # noqa: E241, E201
|
|
[-1., -1., 5.9091, 5.9091, 5.9091, 5.9091, 5.9091, 5.9091, 5.9091, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
], dtype=torch.float32, device=device).view(1, 11, 11, 1)
|
|
|
|
zbuf_t_expected = torch.tensor([
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., 33.8461, 33.8462, 33.8462, -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 24.4444, 24.4444, 24.4444, 24.4444, 24.4444, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 19.1304, 19.1304, 19.1304, 19.1304, 19.1304, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 15.7143, 15.7143, 15.7143, 15.7143, 15.7143, 15.7143, 15.7143, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., 13.3333, 13.3333, 13.3333, 13.3333, 13.3333, 13.3333, 13.3333, -1., -1.], # noqa: E241, E201
|
|
[-1., 11.5789, 11.5789, 11.5789, 11.5789, 11.5789, 11.5789, 11.5789, 11.5789, 11.5789, -1.], # noqa: E241, E201
|
|
[-1., 10.2326, 10.2326, 10.2326, 10.2326, 10.2326, 10.2326, 10.2326, 10.2326, 10.2326, -1.], # noqa: E241, E201
|
|
[-1., 9.1667, 9.1667, 9.1667, 9.1667, 9.1667, 9.1667, 9.1667, 9.1667, 9.1667, -1.], # noqa: E241, E201
|
|
[-1., -1., 8.3019, 8.3019, 8.3019, 8.3019, 8.3019, 8.3019, 8.3019, -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1., -1.] # noqa: E241, E201
|
|
], dtype=torch.float32, device=device).view(1, 11, 11, 1)
|
|
# fmt: on
|
|
|
|
self.assertTrue(torch.all(idx_f == idx_expected).item())
|
|
self.assertTrue(torch.all(idx_t == idx_expected).item())
|
|
dists_t_max_diff = (dists_t - dists_expected).abs().max().item()
|
|
dists_f_max_diff = (dists_f - dists_expected).abs().max().item()
|
|
self.assertLess(dists_t_max_diff, 1e-4)
|
|
self.assertLess(dists_f_max_diff, 1e-4)
|
|
zbuf_f_max_diff = (zbuf_f - zbuf_f_expected).abs().max().item()
|
|
zbuf_t_max_diff = (zbuf_t - zbuf_t_expected).abs().max().item()
|
|
self.assertLess(zbuf_f_max_diff, 1e-4)
|
|
self.assertLess(zbuf_t_max_diff, 1e-4)
|
|
|
|
# Check barycentrics by using them to re-compute zbuf
|
|
z0 = verts[0, 2]
|
|
z1 = verts[1, 2]
|
|
z2 = verts[2, 2]
|
|
w0_f, w1_f, w2_f = bary_f.unbind(dim=4)
|
|
w0_t, w1_t, w2_t = bary_t.unbind(dim=4)
|
|
zbuf_f_bary = w0_f * z0 + w1_f * z1 + w2_f * z2
|
|
zbuf_t_bary = w0_t * z0 + w1_t * z1 + w2_t * z2
|
|
mask = idx_expected != -1
|
|
zbuf_f_bary_diff = (zbuf_f_bary[mask] - zbuf_f_expected[mask]).abs().max()
|
|
zbuf_t_bary_diff = (zbuf_t_bary[mask] - zbuf_t_expected[mask]).abs().max()
|
|
self.assertLess(zbuf_f_bary_diff, 1e-4)
|
|
self.assertLess(zbuf_t_bary_diff, 1e-4)
|
|
|
|
def _test_barycentric_clipping(self, rasterize_meshes_fn, device, bin_size=None):
|
|
# fmt: off
|
|
verts = torch.tensor([
|
|
[-0.4, -0.4, 10], # noqa: E241, E201
|
|
[ 0.4, -0.4, 10], # noqa: E241, E201
|
|
[ 0.0, 0.4, 20], # noqa: E241, E201
|
|
], dtype=torch.float32, device=device)
|
|
# fmt: on
|
|
faces = torch.tensor([[0, 1, 2]], device=device)
|
|
meshes = Meshes(verts=[verts], faces=[faces])
|
|
kwargs = {
|
|
"meshes": meshes,
|
|
"image_size": 5,
|
|
"faces_per_pixel": 1,
|
|
"blur_radius": 0.2,
|
|
"perspective_correct": False,
|
|
"clip_barycentric_coords": False, # Initially set this to false
|
|
}
|
|
if bin_size != -1:
|
|
kwargs["bin_size"] = bin_size
|
|
|
|
# Run with and without perspective correction
|
|
idx_f, zbuf_f, bary_f, dists_f = rasterize_meshes_fn(**kwargs)
|
|
|
|
# fmt: off
|
|
expected_bary = torch.tensor([
|
|
[
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[-0.2500, -0.2500, 1.5000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000] # noqa: E241, E201
|
|
],
|
|
[
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[-0.5000, 0.5000, 1.0000], # noqa: E241, E201
|
|
[-0.0000, -0.0000, 1.0000], # noqa: E241, E201
|
|
[ 0.5000, -0.5000, 1.0000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000] # noqa: E241, E201
|
|
],
|
|
[
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[-0.2500, 0.7500, 0.5000], # noqa: E241, E201
|
|
[ 0.2500, 0.2500, 0.5000], # noqa: E241, E201
|
|
[ 0.7500, -0.2500, 0.5000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000] # noqa: E241, E201
|
|
],
|
|
[
|
|
[-0.5000, 1.5000, -0.0000], # noqa: E241, E201
|
|
[-0.0000, 1.0000, -0.0000], # noqa: E241, E201
|
|
[ 0.5000, 0.5000, -0.0000], # noqa: E241, E201
|
|
[ 1.0000, -0.0000, -0.0000], # noqa: E241, E201
|
|
[ 1.5000, -0.5000, 0.0000] # noqa: E241, E201
|
|
],
|
|
[
|
|
[-1.0000, -1.0000, -1.0000], # noqa: E241, E201
|
|
[ 0.2500, 1.2500, -0.5000], # noqa: E241, E201
|
|
[ 0.7500, 0.7500, -0.5000], # noqa: E241, E201
|
|
[ 1.2500, 0.2500, -0.5000], # noqa: E241, E201
|
|
[-1.0000, -1.0000, -1.0000] # noqa: E241, E201
|
|
]
|
|
], dtype=torch.float32, device=device).view(1, 5, 5, 1, 3)
|
|
# fmt: on
|
|
|
|
self.assertClose(expected_bary, bary_f, atol=1e-4)
|
|
|
|
# calculate the expected clipped barycentrics and zbuf
|
|
expected_bary_clipped = _clip_barycentric_coordinates(expected_bary)
|
|
expected_z_clipped = _interpolate_zbuf(idx_f, expected_bary_clipped, meshes)
|
|
|
|
kwargs["clip_barycentric_coords"] = True
|
|
idx_t, zbuf_t, bary_t, dists_t = rasterize_meshes_fn(**kwargs)
|
|
|
|
self.assertClose(expected_bary_clipped, bary_t, atol=1e-4)
|
|
self.assertClose(expected_z_clipped, zbuf_t, atol=1e-4)
|
|
|
|
def _test_behind_camera(self, rasterize_meshes_fn, device, bin_size=None):
|
|
"""
|
|
All verts are behind the camera so nothing should get rasterized.
|
|
"""
|
|
N = 1
|
|
# fmt: off
|
|
verts = torch.tensor(
|
|
[
|
|
[ -0.5, 0.0, -0.1], # noqa: E241, E201
|
|
[ 0.0, 0.6, -0.1], # noqa: E241, E201
|
|
[ 0.5, 0.0, -0.1], # noqa: E241, E201
|
|
[-0.25, 0.0, -0.9], # noqa: E241, E201
|
|
[ 0.25, 0.5, -0.9], # noqa: E241, E201
|
|
[ 0.75, 0.0, -0.9], # noqa: E241, E201
|
|
[ -0.4, 0.0, -0.5], # noqa: E241, E201
|
|
[ 0.6, 0.6, -0.5], # noqa: E241, E201
|
|
[ 0.8, 0.0, -0.5], # noqa: E241, E201
|
|
[ -0.2, 0.0, -0.5], # noqa: E241, E201
|
|
[ 0.3, 0.6, -0.5], # noqa: E241, E201
|
|
[ 0.4, 0.0, -0.5], # noqa: E241, E201
|
|
],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
# fmt: on
|
|
faces = torch.tensor(
|
|
[[1, 0, 2], [4, 3, 5], [7, 6, 8], [10, 9, 11]],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
meshes = Meshes(verts=[verts], faces=[faces])
|
|
image_size = 16
|
|
faces_per_pixel = 1
|
|
radius = 0.2
|
|
idx_expected = torch.full(
|
|
(N, image_size, image_size, faces_per_pixel),
|
|
fill_value=-1,
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
bary_expected = torch.full(
|
|
(N, image_size, image_size, faces_per_pixel, 3),
|
|
fill_value=-1,
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
zbuf_expected = torch.full(
|
|
(N, image_size, image_size, faces_per_pixel),
|
|
fill_value=-1,
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
dists_expected = zbuf_expected.clone()
|
|
if bin_size == -1:
|
|
# naive python version with no binning
|
|
idx, zbuf, bary, dists = rasterize_meshes_fn(
|
|
meshes, image_size, radius, faces_per_pixel
|
|
)
|
|
else:
|
|
idx, zbuf, bary, dists = rasterize_meshes_fn(
|
|
meshes, image_size, radius, faces_per_pixel, bin_size
|
|
)
|
|
idx_same = (idx == idx_expected).all().item()
|
|
zbuf_same = (zbuf == zbuf_expected).all().item()
|
|
self.assertTrue(idx_same)
|
|
self.assertTrue(zbuf_same)
|
|
self.assertClose(bary, bary_expected)
|
|
self.assertClose(dists, dists_expected)
|
|
|
|
def _simple_triangle_raster(self, raster_fn, device, bin_size=None):
|
|
image_size = 10
|
|
|
|
# Mesh with a single non-symmetrical face - this will help
|
|
# check that the XY directions are correctly oriented.
|
|
verts0 = torch.tensor(
|
|
[[-0.3, -0.4, 0.1], [0.0, 0.6, 0.1], [0.9, -0.4, 0.1]],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
faces0 = torch.tensor([[1, 0, 2]], dtype=torch.int64, device=device)
|
|
|
|
# Mesh with two overlapping faces.
|
|
# fmt: off
|
|
verts1 = torch.tensor(
|
|
[
|
|
[-0.9, -0.2, 0.1], # noqa: E241, E201
|
|
[ 0.0, 0.6, 0.1], # noqa: E241, E201
|
|
[ 0.7, -0.4, 0.1], # noqa: E241, E201
|
|
[-0.7, 0.4, 0.5], # noqa: E241, E201
|
|
[ 0.0, -0.6, 0.5], # noqa: E241, E201
|
|
[ 0.7, 0.4, 0.5], # noqa: E241, E201
|
|
],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
# fmt on
|
|
faces1 = torch.tensor(
|
|
[[1, 0, 2], [3, 4, 5]], dtype=torch.int64, device=device
|
|
)
|
|
|
|
# Expected output tensors in the format with axes +X left, +Y up, +Z in
|
|
# k = 0, closest point.
|
|
# fmt off
|
|
expected_p2face_k0 = torch.tensor(
|
|
[
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, 0, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 0, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
],
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, 1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 2, 2, 1, 1, 1, 2, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 1, 1, 1, 1, 1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 1, 1, 1, 1, 1, 1, -1], # noqa: E241, E201
|
|
[-1, -1, 1, 1, 1, 2, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
],
|
|
],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
expected_zbuf_k0 = torch.tensor(
|
|
[
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, 0.1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0.1, 0.1, 0.1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 0.1, 0.1, 0.1, 0.1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 0.1, 0.1, 0.1, 0.1, 0.1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241, E201
|
|
],
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, 0.1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, 0.5, 0.5, 0.1, 0.1, 0.1, 0.5, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0.1, 0.1, 0.1, 0.1, 0.1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, -1], # noqa: E241, E201
|
|
[-1, -1, 0.1, 0.1, 0.1, 0.5, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241, E201
|
|
]
|
|
],
|
|
device=device,
|
|
)
|
|
# fmt: on
|
|
|
|
meshes = Meshes(verts=[verts0, verts1], faces=[faces0, faces1])
|
|
|
|
# k = 1, second closest point.
|
|
expected_p2face_k1 = expected_p2face_k0.clone()
|
|
expected_p2face_k1[0, :] = torch.ones_like(expected_p2face_k1[0, :]) * -1
|
|
|
|
# fmt: off
|
|
expected_p2face_k1[1, :] = torch.tensor(
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, 2, 2, 2, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 2, 2, 2, 2, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, 2, 2, 2, 2, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, 2, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1] # noqa: E241, E201
|
|
],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
expected_zbuf_k1 = expected_zbuf_k0.clone()
|
|
expected_zbuf_k1[0, :] = torch.ones_like(expected_zbuf_k1[0, :]) * -1
|
|
expected_zbuf_k1[1, :] = torch.tensor(
|
|
[
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., 0.5, 0.5, 0.5, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 0.5, 0.5, 0.5, 0.5, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., 0.5, 0.5, 0.5, 0.5, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., 0.5, -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.] # noqa: E241, E201
|
|
],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
# fmt: on
|
|
|
|
# Coordinate conventions +Y up, +Z in, +X left
|
|
if bin_size == -1:
|
|
# simple python, no bin_size
|
|
p2face, zbuf, bary, pix_dists = raster_fn(meshes, image_size, 0.0, 2)
|
|
else:
|
|
p2face, zbuf, bary, pix_dists = raster_fn(
|
|
meshes, image_size, 0.0, 2, bin_size
|
|
)
|
|
|
|
self.assertClose(p2face[..., 0], expected_p2face_k0)
|
|
self.assertClose(zbuf[..., 0], expected_zbuf_k0)
|
|
self.assertClose(p2face[..., 1], expected_p2face_k1)
|
|
self.assertClose(zbuf[..., 1], expected_zbuf_k1)
|
|
|
|
def _simple_blurry_raster(self, raster_fn, device, bin_size=None):
|
|
"""
|
|
Check that pix_to_face, dist and zbuf values are invariant to the
|
|
ordering of faces.
|
|
"""
|
|
image_size = 10
|
|
blur_radius = 0.12 ** 2
|
|
faces_per_pixel = 1
|
|
|
|
# fmt: off
|
|
verts = torch.tensor(
|
|
[
|
|
[ -0.3, 0.0, 0.1], # noqa: E241, E201
|
|
[ 0.0, 0.6, 0.1], # noqa: E241, E201
|
|
[ 0.8, 0.0, 0.1], # noqa: E241, E201
|
|
[-0.25, 0.0, 0.9], # noqa: E241, E201
|
|
[0.25, 0.5, 0.9], # noqa: E241, E201
|
|
[0.75, 0.0, 0.9], # noqa: E241, E201
|
|
[-0.4, 0.0, 0.5], # noqa: E241, E201
|
|
[ 0.6, 0.6, 0.5], # noqa: E241, E201
|
|
[ 0.8, 0.0, 0.5], # noqa: E241, E201
|
|
[-0.2, 0.0, -0.5], # noqa: E241, E201 face behind the camera
|
|
[ 0.3, 0.6, -0.5], # noqa: E241, E201
|
|
[ 0.4, 0.0, -0.5], # noqa: E241, E201
|
|
],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
# Face with index 0 is non symmetric about the X and Y axis to
|
|
# test that the positive Y and X directions are correct in the output.
|
|
faces_packed = torch.tensor(
|
|
[[1, 0, 2], [4, 3, 5], [7, 6, 8], [10, 9, 11]],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
expected_p2f = torch.tensor(
|
|
[
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 2, 2, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 2, 0, 0, 0, 0, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, 0, -1, -1, -1], # noqa: E241, E201
|
|
[-1, 0, 0, 0, 0, 0, 0, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
[-1, -1, -1, -1, -1, -1, -1, -1, -1, -1], # noqa: E241, E201
|
|
],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
expected_zbuf = torch.tensor(
|
|
[
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., 0.5, 0.5, 0.1, 0.1, 0.1, -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., 0.5, 0.1, 0.1, 0.1, 0.1, -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.], # noqa: E241, E201
|
|
[-1., -1., -1., -1., -1., -1., -1., -1., -1., -1.] # noqa: E241, E201
|
|
],
|
|
dtype=torch.float32,
|
|
device=device,
|
|
)
|
|
# fmt: on
|
|
|
|
for i, order in enumerate([[0, 1, 2], [1, 2, 0], [2, 0, 1]]):
|
|
faces = faces_packed[order] # rearrange order of faces.
|
|
mesh = Meshes(verts=[verts], faces=[faces])
|
|
if bin_size == -1:
|
|
# simple python, no bin size arg
|
|
pix_to_face, zbuf, bary_coords, dists = raster_fn(
|
|
mesh, image_size, blur_radius, faces_per_pixel
|
|
)
|
|
else:
|
|
pix_to_face, zbuf, bary_coords, dists = raster_fn(
|
|
mesh, image_size, blur_radius, faces_per_pixel, bin_size
|
|
)
|
|
if i == 0:
|
|
expected_dists = dists
|
|
p2f = expected_p2f.clone()
|
|
p2f[expected_p2f == 0] = order.index(0)
|
|
p2f[expected_p2f == 1] = order.index(1)
|
|
p2f[expected_p2f == 2] = order.index(2)
|
|
self.assertClose(pix_to_face.squeeze(), p2f)
|
|
self.assertClose(zbuf.squeeze(), expected_zbuf, rtol=1e-5)
|
|
self.assertClose(dists, expected_dists)
|
|
|
|
def _test_coarse_rasterize(self, device):
|
|
image_size = 16
|
|
# No blurring. This test checks that the XY directions are
|
|
# correctly oriented.
|
|
blur_radius = 0.0
|
|
bin_size = 8
|
|
max_faces_per_bin = 3
|
|
|
|
# fmt: off
|
|
verts = torch.tensor(
|
|
[
|
|
[-0.5, 0.1, 0.1], # noqa: E241, E201
|
|
[-0.3, 0.6, 0.1], # noqa: E241, E201
|
|
[-0.1, 0.1, 0.1], # noqa: E241, E201
|
|
[-0.3, -0.1, 0.4], # noqa: E241, E201
|
|
[ 0.3, 0.5, 0.4], # noqa: E241, E201
|
|
[0.75, -0.1, 0.4], # noqa: E241, E201
|
|
[ 0.2, -0.3, 0.9], # noqa: E241, E201
|
|
[ 0.3, -0.7, 0.9], # noqa: E241, E201
|
|
[ 0.6, -0.3, 0.9], # noqa: E241, E201
|
|
[-0.4, 0.0, -1.5], # noqa: E241, E201
|
|
[ 0.6, 0.6, -1.5], # noqa: E241, E201
|
|
[ 0.8, 0.0, -1.5], # noqa: E241, E201
|
|
],
|
|
device=device,
|
|
)
|
|
# Expected faces using axes convention +Y down, + X right, +Z in
|
|
# Non symmetrical triangles i.e face 0 and 3 are in one bin only
|
|
faces = torch.tensor(
|
|
[
|
|
[ 1, 0, 2], # noqa: E241, E201 bin 01 only
|
|
[ 4, 3, 5], # noqa: E241, E201 all bins
|
|
[ 7, 6, 8], # noqa: E241, E201 bin 10 only
|
|
[10, 9, 11], # noqa: E241, E201 negative z, should not appear.
|
|
],
|
|
dtype=torch.int64,
|
|
device=device,
|
|
)
|
|
# fmt: on
|
|
|
|
meshes = Meshes(verts=[verts], faces=[faces])
|
|
faces_verts = verts[faces]
|
|
num_faces_per_mesh = meshes.num_faces_per_mesh()
|
|
mesh_to_face_first_idx = meshes.mesh_to_faces_packed_first_idx()
|
|
|
|
# Expected faces using axes convention +Y down, + X right, + Z in
|
|
bin_faces_expected = (
|
|
torch.ones((1, 2, 2, max_faces_per_bin), dtype=torch.int32, device=device)
|
|
* -1
|
|
)
|
|
bin_faces_expected[0, 1, 1, 0] = torch.tensor([1])
|
|
bin_faces_expected[0, 0, 1, 0:2] = torch.tensor([1, 2])
|
|
bin_faces_expected[0, 1, 0, 0:2] = torch.tensor([0, 1])
|
|
bin_faces_expected[0, 0, 0, 0] = torch.tensor([1])
|
|
|
|
# +Y up, +X left, +Z in
|
|
bin_faces = _C._rasterize_meshes_coarse(
|
|
faces_verts,
|
|
mesh_to_face_first_idx,
|
|
num_faces_per_mesh,
|
|
image_size,
|
|
blur_radius,
|
|
bin_size,
|
|
max_faces_per_bin,
|
|
)
|
|
|
|
bin_faces_same = (bin_faces.squeeze() == bin_faces_expected).all()
|
|
self.assertTrue(bin_faces_same.item() == 1)
|
|
|
|
@staticmethod
|
|
def rasterize_meshes_python_with_init(
|
|
num_meshes: int,
|
|
ico_level: int,
|
|
image_size: int,
|
|
blur_radius: float,
|
|
faces_per_pixel: int,
|
|
):
|
|
device = torch.device("cpu")
|
|
meshes = ico_sphere(ico_level, device)
|
|
meshes_batch = meshes.extend(num_meshes)
|
|
|
|
def rasterize():
|
|
rasterize_meshes_python(
|
|
meshes_batch, image_size, blur_radius, faces_per_pixel
|
|
)
|
|
|
|
return rasterize
|
|
|
|
@staticmethod
|
|
def rasterize_meshes_cpu_with_init(
|
|
num_meshes: int,
|
|
ico_level: int,
|
|
image_size: int,
|
|
blur_radius: float,
|
|
faces_per_pixel: int,
|
|
):
|
|
meshes = ico_sphere(ico_level, torch.device("cpu"))
|
|
meshes_batch = meshes.extend(num_meshes)
|
|
|
|
def rasterize():
|
|
rasterize_meshes(
|
|
meshes_batch,
|
|
image_size,
|
|
blur_radius,
|
|
faces_per_pixel=faces_per_pixel,
|
|
bin_size=0,
|
|
)
|
|
|
|
return rasterize
|
|
|
|
@staticmethod
|
|
def rasterize_meshes_cuda_with_init(
|
|
num_meshes: int,
|
|
ico_level: int,
|
|
image_size: int,
|
|
blur_radius: float,
|
|
faces_per_pixel: int,
|
|
):
|
|
device = get_random_cuda_device()
|
|
meshes = ico_sphere(ico_level, device)
|
|
meshes_batch = meshes.extend(num_meshes)
|
|
torch.cuda.synchronize(device)
|
|
|
|
def rasterize():
|
|
rasterize_meshes(meshes_batch, image_size, blur_radius, faces_per_pixel)
|
|
torch.cuda.synchronize(device)
|
|
|
|
return rasterize
|