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nerfacc.ray_aabb_intersect

nerfacc.ray_aabb_intersect(rays_o, rays_d, aabb)

Ray AABB Test.

Note

this function is not differentiable to any inputs.

Parameters:

  • rays_o (Tensor) – Ray origins of shape (n_rays, 3).

  • rays_d (Tensor) – Normalized ray directions of shape (n_rays, 3).

  • aabb (Tensor) – Scene bounding box {xmin, ymin, zmin, xmax, ymax, zmax}. Tensor with shape (6)

Returns:

Ray AABB intersection {t_min, t_max} with shape (n_rays) respectively. Note the t_min is clipped to minimum zero. 1e10 means no intersection.

Return type:

Tuple[Tensor, Tensor]

Examples:

aabb = torch.tensor([0.0, 0.0, 0.0, 1.0, 1.0, 1.0], device="cuda:0")
rays_o = torch.rand((128, 3), device="cuda:0")
rays_d = torch.randn((128, 3), device="cuda:0")
rays_d = rays_d / rays_d.norm(dim=-1, keepdim=True)
t_min, t_max = ray_aabb_intersect(rays_o, rays_d, aabb)