OpenGL stromeček :-)

#include "Tree.h"
#include <windows.h>
#include <GL/glut.h>
#include <stdlib.h>

Tree::Tree(const int x, const int y, const int height):GraphicObject(x,y)
{
    if(height<2)
    {
        this->height=2;
        this->div=7;
        colorChange = 0.2;
    }
    else
    {
        if(height<=7)
        {
            this->height=height;
            this->div=10-height+1;
            colorChange = 0.08-div/100;
        }
        else
        {
            this->height=7;
            this->div=4;
            colorChange = 0.08;
        }
    }
        for(int i = 0;i<=20;i++) //kmen
        {
            colPoints.insert(std::pair<int, int>(28, i));
        }
/*
        int pom = height * 32;
        for(int z = 32*height;z>=0;z--) //vrch
        {
            colPoints.insert(std::pair<int, int>(i, 0));
        }*/

    for(int i=0;i<this->height;i++)
    {
        colPoints.insert(std::pair<int, int>(6+i*div, 20+i*12));
        colPoints.insert(std::pair<int, int>(58-i*div, 20+i*12));
        colPoints.insert(std::pair<int, int>(32, 34+i*12));

    }
};
void Tree::draw()
{

    glBegin(GL_POLYGON); //kmen
        glColor3f(0.5, 0.15, 0.15);
        glVertex2i(28+x, 0+y); //1
        glVertex2i(36+x, 0+y);
        glVertex2i(36+x, 20+y);
        glVertex2i(28+x, 20+y);
    glEnd();

    for(int i=0;i<this->height;i++)
    {
        glBegin(GL_TRIANGLES);
            glColor3f(0.4, 0.65-i*this->colorChange, 0.45-i*this->colorChange);
            glVertex2i(6+i*div+x, 20+i*12+y);
            glVertex2i(58-i*div+x, 20+i*12+y);
            glVertex2i(32+x, 34+i*12+y);
        glEnd();
    }

};