bilerp¶
-
taichi_glsl.sampling.
bilerp
(field: <taichi.lang.kernel_arguments.Template object at 0x7f9dc1a06d30>, P)¶ Bilinear sampling an 2D field with a real index.
- Parameters
field – (2D Tensor) Specify the field to sample.
P – (2D Vector of float) Specify the index in field.
- Note
If one of the element to be accessed is out of field.shape, then bilerp will automatically do a clamp for you, see
sample()
.- Returns
The return value is calcuated as:
I = int(P) x = fract(P) y = 1 - x return (sample(field, I + D.xx) * x.x * x.y + sample(field, I + D.xy) * x.x * y.y + sample(field, I + D.yy) * y.x * y.y + sample(field, I + D.yx) * y.x * x.y)