uniform mat4 mvp_mat;
attribute vec4 vcolor;
attribute vec2 vst;
/** Vertex position.
x, y, z, c
c is the color of the point.
*/
attribute vec3 vertex;
varying vec4 color;
varying vec2 st;
void
main (void)
{
gl_Position = mvp_mat * vec4 (vertex, 1.0);
color = vcolor;
st = vst;
}