attribute vec2 aVertexPosition;
attribute vec4 aColor;

uniform mat3 translationMatrix;
uniform mat3 projectionMatrix;

uniform float alpha;
uniform vec3 tint;

varying vec4 vColor;

void main(void){
   gl_Position = vec4((projectionMatrix * translationMatrix * vec3(aVertexPosition, 1.0)).xy, 0.0, 1.0);
   vColor = aColor * vec4(tint * alpha, alpha);
}