attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_texCoord0;

uniform mat4 u_projTrans;

varying vec4 vColor;
varying vec2 vTexCoord;

void main() {
  vColor = a_color;
  vColor.a = vColor.a * (255.0/254.0);
  vTexCoord = a_texCoord0;
  gl_Position = u_projTrans * a_position;
}