#version 450 core
in vec3 vPos;
in vec4 vCol;
in vec2 vControls;
layout (location=0) out vec4 fCol;
layout (location=1) out vec4 fPos;
layout (location=2) out vec4 fNorm;
void main()
{
    float d = dot(vControls,vControls);
    if (d > 1) {discard;}
    // the following is an alternative without using discard
    // not sure how this would interact with bloom
    //float d = min(dot(vControls,vControls),1);
    float a = vCol.w*(1-d);
    fCol = vec4(vCol.xyz,a);
    fPos = vec4(vPos, a);
    //fNorm = vec4(-vControls, -0.1 + 0.2 * d ,fCol.w);
    fNorm = vec4(-vControls, -0.1 + 0.3 * d ,a);
}