[require]
GL >= 3.1
GLSL >= 1.40

[vertex shader passthrough]

[fragment shader]
#version 140

    struct Set {
      vec3 color;
      float arr[3];
    };

    uniform Set u_s;


    void main () {
      gl_FragColor = vec4(u_s.color * u_s.arr[0], 1.0);
      // gl_FragColor = vec4(u_s.color * vec3(1.0, 0.0, 0.0), 1.0);
    }

[test]
uniform float u_s.arr[0] 1
uniform float u_s.arr[1] 0.8
uniform float u_s.arr[2] 0.6
uniform vec3  u_s.color 1 1 1

draw rect -1 -1 2 2