#include "vector.h"
#include <cstdlib>
#include "GL/glut.h"
#include <cmath>
#include <cstdio>
#include <vector>
using namespace std;

const double PI = acos(-1.0);

// baru 03-09-2014
double a = 10.0, b = 10.0, c = 10.0;
double speed = 0.1;
vector4d oby[210][105];
int point;
vector<vector4d> points;
bool mouseState = false;

void ellipsoid() {
	int i = 0;
	for (double u = -PI; i < 20; u += PI / 10, i++) {
		int j = 0;
		for (double v = -PI / 2; j < 10; v += PI / 10, j++) {
			double x = a * cos(v)*cos(u);		oby[i][j].setX(x);
			double y = b * cos(v)*sin(u);		oby[i][j].setY(y);
			double z = c * sin(v);			oby[i][j].setZ(z);
		}
	}
}

void keyboard(unsigned char key, int x, int y) {
	if (key == ' ' && !points.empty())
		points.pop_back();
	if (key == 'a')
		speed -= 0.05;
	if (key == 'd')
		speed += 0.05;
	if (key == 'j')
		a -= 5;
	if (key == 'u')
		a += 5;
	if (key == 'k')
		b -= 5;
	if (key == 'i')
		b += 5;
	if (key == 'l')
		c -= 5;
	if (key == 'o')
		c += 5;
	ellipsoid();
	glutPostRedisplay();
}

void mouse(int button, int state, int x, int y) {
	float fx = x/600.f, fy = y/600.0f;
	if (button == 0 && state == 0) {
		for (int i = 0; i < points.size(); i++) {
			if (hypot(fx-points[i].getX(), fy-points[i].getY()) > 0.03) //out circle
				continue;
			point = i;
			points[point].setX(points[i].getX());
			points[point].setY(points[i].getY());
			mouseState = true;
		}
		if (!mouseState)
			points.push_back(vector4d(fx, fy));
	}
	if (button == 0 && state == 1) {
		mouseState = false;
	}
	glutPostRedisplay();
}

void motion(int x, int y) {
	if (mouseState) {
		points[point].setX(x/600.0f);
		points[point].setY(y/600.0f);
	}
	glutPostRedisplay();
}

void display() {
	glClear(GL_COLOR_BUFFER_BIT);
	// baru 03-09-2014
	glColor3f(0.5, 0.8, 0.1);
	for (int i = 0; i < 20; i++)
		for (int j = 0; j < 9; j++) {
			glBegin(GL_LINES);
			glVertex3f(oby[i][j].getX(), oby[i][j].getY(), oby[i][j].getZ());
			glVertex3f(oby[i][(j+1)%10].getX(), oby[i][(j+1)%10].getY(), oby[i][(j+1)%10].getZ());
			glEnd();
		}
	glColor3f(1.0, 1.0, 0.0);
	for (int j = 0; j < 10; j++)
		for (int i = 0; i < 20; i++) {
			glBegin(GL_LINES);
			glVertex3f(oby[i][j].getX(), oby[i][j].getY(), oby[i][j].getZ());
			glVertex3f(oby[(i+1)%20][j].getX(), oby[(i+1)%20][j].getY(), oby[(i+1)%20][j].getZ());
			glEnd();
		}
	glutSwapBuffers();
}

void idle() {
	//speed += 0.5;
	glRotatef(speed, 0, 1, 1);
	glutPostRedisplay();
}

void myInit() {
	glMatrixMode (GL_PROJECTION);
	//gluOrtho2D (-1.0, 1.0, 1.0, -1.0);
	glOrtho(-100.0, 100.0, 100.0, -100.0, -1000.0, 1000.0);
	glClearColor(0.0, 0.0, 0.0, 0.1);
	// baru 03-09-2014
	a = 80.0, b = 50.0, c = 50.0;
	ellipsoid();

}

int main(int argc, char**argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
	glutInitWindowSize(600,600);
	glutInitWindowPosition(100,100);
	glutCreateWindow("GeLUT");
	glutDisplayFunc(display);
	glutKeyboardFunc(keyboard);
	glutMouseFunc(mouse);
	glutMotionFunc(motion);
	glutIdleFunc(idle);
	myInit();
	glutMainLoop();
	return 0;
};