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Add MeshRendererWithFragments class to also return fragments after rendering

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Summary: Users want to be able to obtain the depth from the renderer. Current work-around requires running the rasterizer and extra time. This change creates a new renderer class that also returns the fragments from the rasterizer.

Reviewed By: nikhilaravi

Differential Revision: D24432381

fbshipit-source-id: 6552e8a6bfee646791afb34bdb7452fbc4094aed
This commit is contained in:
Dave Schnizlein
2020-11-05 09:18:36 -08:00
committed by Facebook GitHub Bot
parent b6be3b95fb
commit 83fef0a576
2 changed files with 77 additions and 6 deletions
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40
tests/test_render_meshes.py
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@@ -24,7 +24,7 @@ from pytorch3d.renderer.lighting import PointLights
from pytorch3d.renderer.materials import Materials
from pytorch3d.renderer.mesh import TexturesAtlas, TexturesUV, TexturesVertex
from pytorch3d.renderer.mesh.rasterizer import MeshRasterizer, RasterizationSettings
from pytorch3d.renderer.mesh.renderer import MeshRenderer
from pytorch3d.renderer.mesh.renderer import MeshRenderer, MeshRendererWithFragments
from pytorch3d.renderer.mesh.shader import (
BlendParams,
HardFlatShader,
@@ -50,7 +50,7 @@ DATA_DIR = Path(__file__).resolve().parent / "data"
class TestRenderMeshes(TestCaseMixin, unittest.TestCase):
def test_simple_sphere(self, elevated_camera=False):
def test_simple_sphere(self, elevated_camera=False, check_depth=False):
"""
Test output of phong and gouraud shading matches a reference image using
the default values for the light sources.
@@ -114,8 +114,16 @@ class TestRenderMeshes(TestCaseMixin, unittest.TestCase):
materials=materials,
blend_params=blend_params,
)
renderer = MeshRenderer(rasterizer=rasterizer, shader=shader)
images = renderer(sphere_mesh)
if check_depth:
renderer = MeshRendererWithFragments(
rasterizer=rasterizer, shader=shader
)
images, fragments = renderer(sphere_mesh)
self.assertClose(fragments.zbuf, rasterizer(sphere_mesh).zbuf)
else:
renderer = MeshRenderer(rasterizer=rasterizer, shader=shader)
images = renderer(sphere_mesh)
rgb = images[0, ..., :3].squeeze().cpu()
filename = "simple_sphere_light_%s%s%s.png" % (
name,
@@ -144,8 +152,19 @@ class TestRenderMeshes(TestCaseMixin, unittest.TestCase):
materials=materials,
blend_params=blend_params,
)
phong_renderer = MeshRenderer(rasterizer=rasterizer, shader=phong_shader)
images = phong_renderer(sphere_mesh, lights=lights)
if check_depth:
phong_renderer = MeshRendererWithFragments(
rasterizer=rasterizer, shader=phong_shader
)
images, fragments = phong_renderer(sphere_mesh, lights=lights)
self.assertClose(
fragments.zbuf, rasterizer(sphere_mesh, lights=lights).zbuf
)
else:
phong_renderer = MeshRenderer(
rasterizer=rasterizer, shader=phong_shader
)
images = phong_renderer(sphere_mesh, lights=lights)
rgb = images[0, ..., :3].squeeze().cpu()
if DEBUG:
filename = "DEBUG_simple_sphere_dark%s%s.png" % (
@@ -171,6 +190,15 @@ class TestRenderMeshes(TestCaseMixin, unittest.TestCase):
"""
self.test_simple_sphere(elevated_camera=True)
def test_simple_sphere_depth(self):
"""
Test output of phong and gouraud shading matches a reference image using
the default values for the light sources.
The rendering is performed with a camera that has non-zero elevation.
"""
self.test_simple_sphere(check_depth=True)
def test_simple_sphere_screen(self):
"""