al_set_shader_int_vector(1) Allegro 5 API


#include <allegro5/allegro.h>
bool al_set_shader_int_vector(const char *name,
   int num_components, int *i, int num_elems)


Sets an integer vector array uniform of the current target bitmap's shader. The 'num_components' parameter can take one of the values 1, 2, 3 or 4. If it is 1 then an array of 'num_elems' integer elements is added. Otherwise each added array element is assumed to be a vector with 2, 3 or 4 components in it.

For example, if you have a GLSL uniform declared as uniform ivec3 flowers[4] or an HLSL uniform declared as uniform int3 flowers[4], then you'd use this function from your code like so:

int flowers[4][3] =
   {1, 2, 3},
   {4, 5, 6},
   {7, 8, 9},
   {2, 5, 7}
al_set_shader_int_vector("flowers", 3, (int*)flowers, 4);

Returns true on success. Otherwise returns false, e.g. if the uniform by that name does not exist in the shader.