Poisson sample the volume of a sphere with given separation

convenience overloads

----------------------------------------------------------------------------// the exposed SHFL instructions accept a mask parameter in src2 To comput

Allocate a vertex buffer

Allocate a vertex buffer

Allocate a vertex buffer

Set the default config of the environment and load it to self.config

get the postion, velocity of flex particles, and postions of flex shapes.

rotate by quaternion (q, w)

sample shadow map

sample shadow map

sample shadow map

return 1 if the sum is valid, 0 on overflow. negative terms are considered invalid.