attribute vec4 aVertexPosition;
attribute vec3 aVertexNormal;

uniform mat4 prMvMatrix;
uniform mat3 normMatrix;
uniform vec3 directLightDir;
uniform float height;

varying float vLightWeight;

void main(void)
{
	vLightWeight = max(dot(normMatrix * aVertexNormal, directLightDir), 0.0);
    gl_Position = prMvMatrix * vec4( aVertexPosition.xyz*10.0 * (height * aVertexPosition.w + 1.0) * 0.1, 1.0);
}