//
// Created by lukas on 05.02.22.
//

#include "BlockRenderer.h"

#define GL_GLEXT_PROTOTYPES

#include <GL/gl.h>

VertexArray *BlockRenderer::setVertexArray() {
    float cube_vertices[] = {
            // front
            -1.0, -1.0, 1.0,
            1.0, -1.0, 1.0,
            1.0, 1.0, 1.0,
            -1.0, 1.0, 1.0,
            // back
            -1.0, -1.0, -1.0,
            1.0, -1.0, -1.0,
            1.0, 1.0, -1.0,
            -1.0, 1.0, -1.0
    };

    GLfloat cube_colors[] = {
            // front colors
            1.0, 0.0, 0.0,
            0.0, 1.0, 0.0,
            0.0, 0.0, 1.0,
            1.0, 1.0, 1.0,
            // back colors
            1.0, 0.0, 0.0,
            0.0, 1.0, 0.0,
            0.0, 0.0, 1.0,
            1.0, 1.0, 1.0
    };

    // Generate a vertex buffer
    auto *vb = new VertexBuffer(cube_vertices, sizeof(cube_vertices));

    //
    return new VertexArray(*vb);
}

IndexBuffer *BlockRenderer::setIndexBuffer() {
    unsigned cube_elements[] = {
            // front
            0, 1, 2,
            2, 3, 0,
            // right
            1, 5, 6,
            6, 2, 1,
            // back
            7, 6, 5,
            5, 4, 7,
            // left
            4, 0, 3,
            3, 7, 4,
            // bottom
            4, 5, 1,
            1, 0, 4,
            // top
            3, 2, 6,
            6, 7, 3
    };

    return new IndexBuffer(cube_elements, 36);;
}

Shader BlockRenderer::setShader() {
    const std::string vertsrc =

#include "vertex.shader"

    const std::string geosrc =

#include "geometry.shader"

    const std::string fragsrc =

#include "fragment.shader"

    Shader s;
    s.loadShader(vertsrc, geosrc, fragsrc);
    s.Bind();
    return s;
}

BlockRenderer::BlockRenderer() {}