赞
踩
def render(viewpoint_camera, pc : GaussianModel, pipe, bg_color : torch.Tensor, scaling_modifier = 1.0, override_color = None): """ Render the scene. Background tensor (bg_color) must be on GPU! """ # Create zero tensor. We will use it to make pytorch return gradients of the 2D (screen-space) means screenspace_points = torch.zeros_like(pc.get_xyz, dtype=pc.get_xyz.dtype, requires_grad=True, device="cuda") + 0 try: screenspace_points.retain_grad() except: pass # Set up rasterization configuration tanfovx = math.tan(viewpoint_camera.FoVx * 0.5) tanfovy = math.tan(viewpoint_camera.FoVy * 0.5) raster_settings = GaussianRasterizationSettings( image_height=int(viewpoint_camera.image_height), image_width=int(viewpoint_camera.image_width), tanfovx=tanfovx, tanfovy=tanfovy, bg=bg_color, scale_modifier=scaling_modifier, viewmatrix=viewpoint_camera.world_view_transform, projmatrix=viewpoint_camera.full_proj_transform, sh_degree=pc.active_sh_degree, campos=viewpoint_camera.camera_center, prefiltered=False, debug=pipe.debug ) rasterizer = GaussianRasterizer(raster_settings=raster_settings) means3D = pc.get_xyz means2D = screenspace_points opacity = pc.get_opacity # If precomputed 3d covariance is provided, use it. If not, then it will be computed from # scaling / rotation by the rasterizer. scales = None rotations = None cov3D_precomp = None if pipe.compute_cov3D_python: cov3D_precomp = pc.get_covariance(scaling_modifier) else: scales = pc.get_scaling rotations = pc.get_rotation # If precomputed colors are provided, use them. Otherwise, if it is desired to precompute colors # from SHs in Python, do it. If not, then SH -> RGB conversion will be done by rasterizer. shs = None colors_precomp = None if override_color is None: if pipe.convert_SHs_python: shs_view = pc.get_features.transpose(1, 2).view(-1, 3, (pc.max_sh_degree+1)**2) dir_pp = (pc.get_xyz - viewpoint_camera.camera_center.repeat(pc.get_features.shape[0], 1)) dir_pp_normalized = dir_pp/dir_pp.norm(dim=1, keepdim=True) sh2rgb = eval_sh(pc.active_sh_degree, shs_view, dir_pp_normalized) colors_precomp = torch.clamp_min(sh2rgb + 0.5, 0.0) else: shs = pc.get_features else: colors_precomp = override_color # Rasterize visible Gaussians to image, obtain their radii (on screen). rendered_image, radii = rasterizer( means3D = means3D, means2D = means2D, shs = shs, colors_precomp = colors_precomp, opacities = opacity, scales = scales, rotations = rotations, cov3D_precomp = cov3D_precomp) # Those Gaussians that were frustum culled or had a radius of 0 were not visible. # They will be excluded from value updates used in the splitting criteria. return {"render": rendered_image, "viewspace_points": screenspace_points, "visibility_filter" : radii > 0, "radii": radii}
screenspace_points = torch.zeros_like(pc.get_xyz, dtype=pc.get_xyz.dtype, requires_grad=True, device="cuda") + 0
# Set up rasterization configuration
tanfovx = math.tan(viewpoint_camera.FoVx * 0.5)
tanfovy = math.tan(viewpoint_camera.FoVy * 0.5)
raster_settings = GaussianRasterizationSettings( image_height=int(viewpoint_camera.image_height), image_width=int(viewpoint_camera.image_width), tanfovx=tanfovx, tanfovy=tanfovy, bg=bg_color, scale_modifier=scaling_modifier, viewmatrix=viewpoint_camera.world_view_transform,#外参 projmatrix=viewpoint_camera.full_proj_transform,#内参 sh_degree=pc.active_sh_degree,#球谐系数的阶数 campos=viewpoint_camera.camera_center,#相机中心位置 prefiltered=False, debug=pipe.debug #是否启用调试模式 ) rasterizer = GaussianRasterizer(raster_settings=raster_settings)
rendered_image, radii = rasterizer(
means3D = means3D,
means2D = means2D,
shs = shs,
colors_precomp = colors_precomp,
opacities = opacity,
scales = scales,
rotations = rotations,
cov3D_precomp = cov3D_precomp)
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。