#include "circle.h"

#include <GL/gl.h>
#include <wgd/window.h>
#include <wgd/game.h>

#include <math.h>

#define PI 3.141592653589793238

using namespace wgd;

float Circle::draw_x[CIRCLE_POINTS];
float Circle::draw_y[CIRCLE_POINTS];

Circle::Circle(const wgd::InstanceID &inst)
	: Body(inst)
{
	if (property("radius") == Null) { setRadius(25); }
	
	for (int i = 0; i < CIRCLE_POINTS; i++)
	{
		float theta = 2 * i * PI / CIRCLE_POINTS;
		draw_x[i] = cos(theta);
		draw_y[i] = sin(theta);
	}
}

float Circle::getMinX ()
{
	return getX() - getRadius();
}

float Circle::getMaxX ()
{
	return getX() + getRadius();
}

float Circle::getMinY ()
{
	return getY() - getRadius();
}

float Circle::getMaxY ()
{
	return getY() + getRadius();
}

bool Circle::contains (const Vector2D& p)
{
	return (p.distanceSquared(position()) <= getRadiusSq());
}

void Circle::update()
{
	Body::update();
}

void Circle::draw()
{
	glPushMatrix();
	
	glTranslatef(getX(), getY(), property(ix::z));
	
	float radius = getRadius();
	
	Colour c = getColour();

	glColor3f(c.r(), c.g(), c.b());
	
	glBegin(GL_POLYGON);						
		for (int i = 0; i < CIRCLE_POINTS; i++)
		{
			glVertex3f(draw_x[i] * radius, draw_y[i] * radius, 0);
		}
	glEnd();

	glColor3f(0, 0, 0);
	
	float rot = getRotation();
	
	glBegin(GL_LINES);
		glVertex3f(cos(rot) * radius, sin(rot) * radius, 0);
		glVertex3f(-cos(rot) * radius, -sin(rot) * radius, 0);
		glVertex3f(-sin(rot) * radius, cos(rot) * radius, 0);
		glVertex3f(sin(rot) * radius, -cos(rot) * radius, 0);
	glEnd();
	
	glBegin(GL_LINE_LOOP);
		for (int i = 0; i < CIRCLE_POINTS; i++)
		{
			glVertex3f(draw_x[i] * radius, draw_y[i] * radius, 0);
		}
	glEnd();

	glPopMatrix();
}