MeshRasterizerOpenGL import fixes

Summary: Only import it if you ask for it.

Reviewed By: kjchalup

Differential Revision: D38327167

fbshipit-source-id: 3f05231f26eda582a63afc71b669996342b0c6f9

tests/test_rasterize_rectangle_images.py

@@ -17,7 +17,6 @@ from pytorch3d.renderer import (
     look_at_view_transform,
     Materials,
     MeshRasterizer,
-    MeshRasterizerOpenGL,
     MeshRenderer,
     PointLights,
     RasterizationSettings,
@@ -30,6 +29,7 @@ from pytorch3d.renderer.mesh.rasterize_meshes import (
     rasterize_meshes_python,
 )
 from pytorch3d.renderer.mesh.rasterizer import Fragments
+from pytorch3d.renderer.opengl import MeshRasterizerOpenGL
 from pytorch3d.renderer.points import (
     AlphaCompositor,
     PointsRasterizationSettings,

tests/test_rasterizer.py

@@ -15,7 +15,6 @@ from pytorch3d.renderer import (
     FoVPerspectiveCameras,
     look_at_view_transform,
     MeshRasterizer,
-    MeshRasterizerOpenGL,
     OrthographicCameras,
     PerspectiveCameras,
     PointsRasterizationSettings,
@@ -27,6 +26,7 @@ from pytorch3d.renderer.opengl.rasterizer_opengl import (
     _check_raster_settings,
     _convert_meshes_to_gl_ndc,
     _parse_and_verify_image_size,
+    MeshRasterizerOpenGL,
 )
 from pytorch3d.structures import Pointclouds
 from pytorch3d.structures.meshes import Meshes

tests/test_render_meshes.py

@@ -23,7 +23,6 @@ from pytorch3d.renderer import (
     look_at_view_transform,
     Materials,
     MeshRasterizer,
-    MeshRasterizerOpenGL,
     MeshRenderer,
     MeshRendererWithFragments,
     OrthographicCameras,
@@ -44,6 +43,7 @@ from pytorch3d.renderer.mesh.shader import (
     SplatterPhongShader,
     TexturedSoftPhongShader,
 )
+from pytorch3d.renderer.opengl import MeshRasterizerOpenGL
 from pytorch3d.structures.meshes import (
     join_meshes_as_batch,
     join_meshes_as_scene,

tests/test_render_multigpu.py

@@ -14,7 +14,6 @@ from pytorch3d.renderer import (
     HardGouraudShader,
     Materials,
     MeshRasterizer,
-    MeshRasterizerOpenGL,
     MeshRenderer,
     PointLights,
     PointsRasterizationSettings,
@@ -26,6 +25,7 @@ from pytorch3d.renderer import (
     TexturesVertex,
 )
 from pytorch3d.renderer.cameras import FoVPerspectiveCameras, look_at_view_transform
+from pytorch3d.renderer.opengl import MeshRasterizerOpenGL
 from pytorch3d.structures import Meshes, Pointclouds
 from pytorch3d.utils.ico_sphere import ico_sphere