Cogl.Matrix.prototype.transform_points

function transform_points(n_components: Number(gint), stride_in: Number(gsize), points_in: void, stride_out: Number(gsize), points_out: void, n_points: Number(gint)): void {
    // Gjs wrapper for cogl_matrix_transform_points()
}
  

Transforms an array of input points and writes the result to another array of output points. The input points can either have 2 or 3 components each. The output points always have 3 components. The output array can simply point to the input array to do the transform in-place.

If you need to transform 4 component points see Cogl.Matrix.prototype.project_points.

Here's an example with differing input/output strides: |[ typedef struct { float x,y; uint8_t r,g,b,a; float s,t,p; } MyInVertex; typedef struct { uint8_t r,g,b,a; float x,y,z; } MyOutVertex; MyInVertex vertices[N_VERTICES]; MyOutVertex results[N_VERTICES]; CoglMatrix matrix;

my_load_vertices (vertices); my_get_matrix (&matrix);

cogl_matrix_transform_points (&matrix, 2, sizeof (MyInVertex), &vertices[0].x, sizeof (MyOutVertex), &results[0].x, N_VERTICES); ]|