vertex.glsl

attribute vec3 aVertexPosition;

uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;

varying vec3 vLight;

void main() {
    gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
    vLight=aVertexPosition*0.02+vec3(0.5,0.5,0.5);
}