#extension GL_EXT_buffer_reference : require
#extension GL_EXT_scalar_block_layout : require

#include "global.glsl"

#if VERTEX_SHADER

vec2 positions[3] = vec2[](
    vec2(-0.5, 0.5),
    vec2(0.5, 0.5),
    vec2(0.0, -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() {
  VertexColor = colors[gl_VertexIndex];
  
  gl_Position = vec4(positions[gl_VertexIndex] + vec2(gl_InstanceIndex, 0), gl_InstanceIndex, 1.0) * Global.view.world_to_clip;
}

#endif

#if FRAGMENT_SHADER

layout(location = 0) in vec3 VertexColor;

layout(location = 0) out vec4 FragColor;

void main() {
  FragColor = vec4(VertexColor * 10, 1.0);
}

#endif