uniform float amp;
uniform float freq;
uniform float timeScale;

// position and normal are in model coordinates
// color is SRGB
void getProceduralVertex(inout vec4 position, inout vec4 color, inout vec2 texCoord0, inout vec3 normal) {
    vec4 morphPosition = vec4(position.x + amp * sin((freq * position.x) + (timeScale * iGlobalTime)),
                              position.y + amp * sin((freq * position.y) + (timeScale * iGlobalTime)),
                              position.z + amp * sin((freq * position.z) + (timeScale * iGlobalTime)), 1);

    vec4 morphColor = vec4(0.5 * sin((freq * position.x) + (timeScale * iGlobalTime)) + 0.5,
                           0.5 * sin((freq * position.y) + (timeScale * iGlobalTime)) + 0.5,
                           0.5 * sin((freq * position.z) + (timeScale * iGlobalTime)) + 0.5, 1);

    position = morphPosition;
    color = morphColor;
}