#version 330 core
layout (location = 0) in vec3 aPos;
layout (location = 1) in vec2 aTexCoord;

out vec2 TexCoord;

uniform mat4 view;
uniform mat4 projection;
uniform vec3 pos;
uniform float aspectRatio;
uniform float yrot;
uniform int sheetInvert;

void main()
{
    vec3 right = vec3(view[0][0], view[1][0], view[2][0]);
    vec3 up = vec3(view[0][1], view[1][1], view[2][1]);
    vec3 forward = vec3(view[0][2], view[1][2], view[2][2]);

    vec3 upt = aPos.y * up;
    //upt = vec3(0.0, aPos.y, 0.0);

    float angle = yrot;
    float l = sqrt(0.5 - (cos(radians(abs(angle))) / 2)) * -sign(angle);

    vec3 center = pos + (normalize(vec3(forward) * vec3(1.0, 0.0, 1.0)) * -l);
    vec3 vertexPosition = center + (right * aPos.x * aspectRatio) + (upt);
    gl_Position = projection * view * vec4(vertexPosition, 1.0f);

    TexCoord = vec2(abs(aTexCoord.x - sheetInvert), aTexCoord.y);
}