#include "star.h"
#include "glfunctions.h"

star::~star(){
    glDisableVertexAttribArray(1);
    glDisableVertexAttribArray(0);

    vao_->release();
//    glBindBuffer(GL_ARRAY_BUFFER, 0);

    glDeleteBuffers(1, &colors_);
    glDeleteBuffers(1, &vertices_);

    vao_->destroy();

}

void star::Initialize(){

    const float VERTICES[]={
        0.0f, 0.0f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
        0.25f, 0.5f, 0.0f, 1.0f,
        1.0f, 0.5f, 0.0f, 1.0f,
        0.5f ,0.0f, 0.0f, 1.0f,
        1.0f, -1.0f, 0.0f, 1.0f,
        0.0f, -0.5f, 0.0f, 1.0f,
        -1.0f, -1.0f, 0.0f, 1.0f,
        -0.5f ,0.0f, 0.0f, 1.0f,
        -1.0f, 0.5f, 0.0f, 1.0f,
        -0.25f, 0.5f, 0.0f, 1.0f,
        0.0f, 1.0f, 0.0f, 1.0f,
    };


    const float COLORS[]={
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,
        1.0f, 0.0f, 0.0f, 1.0f,


    };
    initializeOpenGLFunctions();
    vao_ = new QOpenGLVertexArrayObject(0);
    vao_->create(); //
    //       glGenVertexArrays(1, &vao_);
    vao_->bind();
    //       glBindVertexArray(vao_);

    glGenBuffers(1, &vertices_);
    glBindBuffer(GL_ARRAY_BUFFER, vertices_);
    glBufferData(GL_ARRAY_BUFFER, sizeof(VERTICES), VERTICES, GL_STATIC_DRAW);
    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(0);

    glGenBuffers(1, &colors_);
    glBindBuffer(GL_ARRAY_BUFFER, colors_);
    glBufferData(GL_ARRAY_BUFFER, sizeof(COLORS), COLORS, GL_STATIC_DRAW);
    glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(1);

}


void star::Draw(Program * prog){
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    vao_->bind();
    //       glBindVertexArray(m_triangle_vao);

    glUseProgram(*prog);

    glDrawArrays(GL_TRIANGLE_FAN, 0, 12);

    glUseProgram(0);
}