// Drawable circle -------------------------------------------------------------

#include "drawable_circle.h"
#include "utils.h"

#include <cmath>
#include <iostream>

using namespace std;

// Static class members --------------------------------------------------------

int Circle::DisplayListId = -1;

// Constructor -----------------------------------------------------------------

Circle::Circle(const double pX, const double pY, const double pZ, const double pRadius)
    : Drawable(pX, pY, pZ)
{
    radius = pRadius;

    if (DisplayListId < 0) {
    	DisplayListId = glGenLists(1);

    	glNewList(DisplayListId, GL_COMPILE); {
    	    render();
	} glEndList();
    }
}

// Draw ------------------------------------------------------------------------

void 
Circle::draw()
{
    glPushMatrix();
    glColor3fv(color);
    glTranslatef(x, y, z);
    glCallList(DisplayListId);
    glPopMatrix();
}

// Render ----------------------------------------------------------------------

void
Circle::render()
{
    draw_circle(0.0, 0.0, radius, 32);
}

// vim: set sts=4 sw=4 ts=8 ft=cpp: --------------------------------------------