layout(location = 0) in vec3 input_position;
layout(location = 1) in vec2 texcoord;


uniform vec2 atlas_shape;

out float v_scale;
out vec2 v_texCoord;
out vec4 v_color;



const vec2 verts[4] = vec2[4](
    vec2(-0.5f, 0.5f),
    vec2(0.5f, 0.5f),
    vec2(0.5f,-0.5f),
    vec2(-0.5, -0.5f)
);

void main() {

    // vec4 _position = <transform(input_position)>;
    gl_Position = vec4(verts[gl_VertexID],0.0,1.0);
    v_texCoord = texcoord / atlas_shape;

    v_scale = 1.0;
    v_color = vec4(1.0, 1.0, 1.0, 1.0);
}