attribute vec3 aVertexPosition;
attribute vec4 aVertexColor;

uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;

varying vec4 vColor;
varying vec3 vFragmentPosition;

uniform float f; // this is incremented every frame
uniform float t; // this is time in milliseconds since epoch

void main(void) {
    gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1);
    vFragmentPosition =  aVertexPosition.xyz;
    vColor = vec4(1.0,1.0,1.0,1.0);
}