[require]
GLSL >= 1.10

[vertex shader]
uniform vec4 val;

float func(vec4 v)
{
	if (v.x > 0.0)
		return v[3];
	else
		return v[2];
}

void main()
{
	gl_FrontColor = vec4(0.0, func(val), 0.0, 0.0);
	gl_Position = gl_Vertex;
}

[fragment shader]
void main()
{
	gl_FragColor = gl_Color;
}

[test]
uniform vec4 val 0.0 0.0 1.0 0.0
draw rect -1 -1 2 2
probe rgb 1 1 0.0 1.0 0.0