warp.volume_sample_grad_index

warp.volume_sample_grad_index(

id: uint64,

uvw: vec3f,

sampling_mode: int32,

voxel_data: Array[Any],

background: Any,

grad: Any,

) → Any

Kernel

Differentiable

Sample the volume given by id and its gradient at the volume local-space point uvw.

Values for allocated voxels are read from the voxel_data array, and background is used as the value of non-existing voxels. Interpolation should be warp.Volume.CLOSEST or warp.Volume.LINEAR. This function is available for both index grids and classical volumes.