#version 460

vec2 triangle[3] = vec2[](
  vec2(0.0, -0.5),
  vec2(0.5, 0.5),
  vec2(-0.5, 0.5)
);

vec3 colors[3] = vec3[](
  vec3(1.0, 0.0, 0.0),
  vec3(0.0, 1.0, 0.0),
  vec3(0.0, 0.0, 1.0)
);

layout(location = 0) out vec3 vertexColor;

void main() {
  gl_Position = vec4(triangle[gl_VertexIndex], 0.0, 1.0);
  vertexColor = colors[gl_VertexIndex];
}