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//-*-c-*-
#include "linalg.h"
#include "rotate.h"
extern "C"
{
/* Translate the points `a` by the vector `v` */
__global__ void
translate(int nthreads, float3 *a, float3 v)
{
int id = blockIdx.x*blockDim.x + threadIdx.x;
if (id >= nthreads)
return;
a[id] += v;
}
/* Rotate the points `a` through an angle `phi` counter-clockwise about the
axis `axis` (when looking towards +infinity). */
__global__ void
rotate(int nthreads, float3 *a, float phi, float3 axis)
{
int id = blockIdx.x*blockDim.x + threadIdx.x;
if (id >= nthreads)
return;
a[id] = rotate(a[id], phi, axis);
}
/* Rotate the points `a` through an angle `phi` counter-clockwise
(when looking towards +infinity along `axis`) about the axis defined
by the point `point` and the vector `axis` . */
__global__ void
rotate_around_point(int nthreads, float3 *a, float phi, float3 axis,
float3 point)
{
int id = blockIdx.x*blockDim.x + threadIdx.x;
if (id >= nthreads)
return;
a[id] -= point;
a[id] = rotate(a[id], phi, axis);
a[id] += point;
}
} // extern "c"
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