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import java.awt.event.MouseWheelEvent;
import javax.media.opengl.GLAutoDrawable;
import javax.swing.*;
import javax.media.opengl.GL;
import javax.media.opengl.glu.GLU;
import com.sun.opengl.util.GLUT;
import java.awt.Point;
import java.awt.event.MouseWheelListener;
import java.awt.geom.Point2D;
import javax.media.opengl.*;
public class Test extends JFrame{
GLJPanel canvas;
public Test(){
super();
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
canvas = new GLJPanel();
canvas.addGLEventListener(new Renderer(this));
this.getContentPane().add(canvas);
canvas.requestFocusInWindow();
this.setPreferredSize(new java.awt.Dimension(800, 600));
this.setMinimumSize(new java.awt.Dimension(800, 600));
}
public void refresh(){
canvas.updateUI();
}
public static void main(String[]args){
new Test().setVisible(true);
}
}
class Renderer implements GLEventListener, MouseWheelListener{
private float zoom = 1;
private final float zoom_inc = 0.025f;
private final float c = 0.025f;
private Test mw;
public Renderer(Test test){
this.mw = test;
}
public void init(GLAutoDrawable arg0) {
GL gl = arg0.getGL();
GLUT glut = new GLUT();
float ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
float diffuse[] = { 0.0f, 0.0f, 1.0f, 1.0f };
float diff_pos[] = {0, 0, zoom, 0f};
float amb_pos[] = {zoom, zoom, zoom, 0f};
gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, ambient, 0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, diff_pos, 0);
gl.glLightfv(GL.GL_LIGHT1, GL.GL_SPECULAR, diffuse, 0);
gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, amb_pos, 0);
gl.glFrontFace(GL.GL_CW);
gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_LIGHT1);
gl.glEnable(GL.GL_AUTO_NORMAL);
gl.glEnable(GL.GL_NORMALIZE);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthFunc(GL.GL_LESS);
gl.glShadeModel(GL.GL_SMOOTH); // Enable Smooth Shading
gl.glClearColor(1f, 1f, 1f, 1f);
gl.glClearDepth(1.0f);
arg0.addMouseWheelListener(this);
}
private double calculateAngle(double p1x, double p1y, double p2x, double p2y){
Point2D.Double p1 = new Point2D.Double(p1x, p1y);
Point2D.Double p2 = new Point2D.Double(p2x, p2y);
Point2D.Double p1p = new Point2D.Double(p1x, -p1y);
double d1 = p1.distance(p2.x, p2.y);
double d2 = p1.distance(p1p.x, p1p.y);
return Math.acos(d2/d1);
}
private double calculateDistance(double p1x, double p1y, double p2x, double p2y){
return Math.sqrt( ((p1x-p2x)*(p1x-p2x)) + ((p1y-p2y)*(p1y-p2y)));
}
private void drawOrigin(GL gl){
float mat[] = new float[4];
mat[0] = (float) 0;
mat[1] = (float) 0;
mat[2] = (float) 0;
mat[3] = 1.0f;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, mat, 0);
mat[0] = (float) 1;
mat[1] = (float) 0;
mat[2] = (float) 0;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat, 0);
GLUT glut = new GLUT();
glut.glutSolidSphere(c*2, 40, 32);
}
public void display(GLAutoDrawable arg0) {
float mat[] = new float[4];
GL gl = arg0.getGL();
GLUT glut = new GLUT();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
gl.glTranslatef(0, 0, -5f * zoom);
drawOrigin(gl);
mat[0] = (float) 0;
mat[1] = (float) 0;
mat[2] = (float) 0;
mat[3] = 1.0f;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, mat, 0);
mat[0] = (float) 0;
mat[1] = (float) 0;
mat[2] = (float) 1;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat, 0);
//First sphere
gl.glPushMatrix();
gl.glTranslatef(-1f, 1f, 0);
glut.glutSolidSphere(c*2, 40, 32);
gl.glPopMatrix();
//Second sphere
gl.glPushMatrix();
gl.glTranslatef(1f, -1f, 0);
glut.glutSolidSphere(c*2, 40, 32);
gl.glPopMatrix();
//Cylinder
gl.glPushMatrix();
float angled = (float)Math.toDegrees(calculateAngle(-1, 1, 1, -1));
float distance = (float)calculateDistance(-1, 1, 1, -1);
System.out.println(angled+"\t"+distance);
gl.glTranslatef(-1f, 1f, 0);
gl.glRotatef(angled, 1f, 1f, 0f);
glut.glutSolidCylinder(c, distance, 40, 32);
gl.glPopMatrix();
gl.glFlush();
}
public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int w, int h) {
GL gl = arg0.getGL();
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
gl.glOrtho(-2.5*w/h*zoom, 2.5*w/h*zoom, -2.5*zoom, 2.5*zoom, -5f * zoom, 5f * zoom);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLAutoDrawable arg0, boolean arg1, boolean arg2) {
}
public void mouseWheelMoved(MouseWheelEvent arg0) {
if (arg0.getWheelRotation() == 1) {
zoom += zoom_inc;
} else {
zoom -= zoom_inc;
}
this.mw.refresh();
}
} |
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