axmol/tests/cpp-tests/Resources/Shaders3D/OutLine.vert

attribute vec4 a_position;
attribute vec3 a_normal;
uniform float OutlineWidth;
uniform mat4 u_MVPMatrix;

void main(void)
{
    vec4 pos = u_MVPMatrix * a_position;
    vec4 normalproj = u_MVPMatrix * vec4(a_normal, 0);
    normalproj = normalize(normalproj);
    pos.xy += normalproj.xy * (OutlineWidth * (pos.z * 0.5 + 0.5));

    gl_Position = pos;
}