lygia/space/sprite)returns a coordinate of a sprite cell
Use:
<vec2> sprite(<vec2> st, <vec2> grid, <float> index)
#ifndef FNC_SPRITE
#define FNC_SPRITE
vec2 sprite(vec2 st, vec2 grid, float index) {
index += grid.x;
vec2 f = 1.0/grid;
vec2 cell = vec2(floor(index), grid.y - floor(index * f.x) );
// cell.y = grid.y - cell.y;
return fract( (st+cell)*f );
}
#endif
Use:
<float2> sprite(<float2> st, <float2> grid, <float> index)
#ifndef FNC_SPRITE
#define FNC_SPRITE
float2 sprite(float2 st, float2 grid, float index) {
float2 f = 1.0/grid;
float2 cell = float2(floor(index), floor(index * f.x) );
cell.y = grid.y - cell.y;
return frac( (st+cell)*f );
}
#endif
Use:
<float2> sprite(<float2> st, <float2> grid, <float> index)
#ifndef FNC_SPRITE
#define FNC_SPRITE
float2 sprite(float2 st, float2 grid, float index) {
index += grid.x;
float2 f = 1.0/grid;
float2 cell = float2(floor(index), grid.y - floor(index * f.x) );
// cell.y = grid.y - cell.y;
return fract( (st+cell)*f );
}
#endif
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