1 package edu.berkeley.qfat;
5 import java.awt.event.*;
7 import javax.media.opengl.*;
8 import javax.media.opengl.glu.*;
9 import com.sun.opengl.util.*;
11 import edu.berkeley.qfat.geom.*;
12 import edu.berkeley.qfat.geom.Point;
14 public abstract class Viewer implements GLEventListener, MouseListener, MouseMotionListener, KeyListener, MouseWheelListener {
16 Mesh.Vertex closest = null;
18 public Mesh tile = new Mesh(false);
19 public Mesh goal = new Mesh(false);
23 private Matrix projection = null;
28 private Point clickPoint = null;
29 Point clickClosest = null;
36 boolean shift = false;
37 boolean control = false;
39 public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) { }
40 public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { }
42 public void init(GLAutoDrawable gld) {
44 gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
45 gl.glViewport(0, 0, 500, 300);
46 gl.glEnable(GL.GL_DEPTH_TEST);
48 gl.glDepthFunc(GL.GL_LEQUAL);
49 gl.glMatrixMode(GL.GL_PROJECTION);
51 gl.glMatrixMode(GL.GL_MODELVIEW);
53 float mat_specular[] = { 0.5f, 0.5f, 0.5f, 0.5f };
54 float mat_shininess[] = { 50.0f };
55 gl.glShadeModel(GL.GL_SMOOTH);
56 //gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, mat_specular, 0);
57 //gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat_specular, 0);
58 //gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, new float[] { 0.3f, 0.3f, 0.3f, 0.3f }, 0);
59 //gl.glMaterialfv(GL.GL_FRONT, GL.GL_SHININESS, mat_shininess, 0);
60 gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, new float[] { 1.0f, 4.0f, -10.0f, 0.0f }, 0);
61 gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, new float[] { -10.0f, 10.0f, 10.0f, 0.0f }, 0);
62 gl.glLightfv(GL.GL_LIGHT2, GL.GL_POSITION, new float[] { 10.0f, -10.0f, 10.0f, 0.0f }, 0);
63 gl.glLightfv(GL.GL_LIGHT3, GL.GL_POSITION, new float[] { 10.0f, 10.0f, -10.0f, 0.0f }, 0);
64 gl.glLightfv(GL.GL_LIGHT4, GL.GL_POSITION, new float[] { -10.0f, 10.0f, -10.0f, 0.0f }, 0);
65 gl.glLightfv(GL.GL_LIGHT5, GL.GL_POSITION, new float[] { 10.0f, -10.0f, -10.0f, 0.0f }, 0);
66 gl.glEnable(GL.GL_LIGHTING);
67 gl.glEnable(GL.GL_LIGHT0);
69 gl.glColorMaterial(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT_AND_DIFFUSE);
70 gl.glEnable(GL.GL_COLOR_MATERIAL);
75 public abstract void _display(GLAutoDrawable drawable, GL gl);
76 public final void display(GLAutoDrawable drawable) {
77 GL gl = drawable.getGL();
78 _display(drawable, gl);
79 projection = Matrix.getProjectionMatrix(gl);
82 protected synchronized void updateVisibility(GL gl, Mesh mesh) {
83 Matrix projection = Matrix.getProjectionMatrix(gl);
84 IntBuffer buf = ByteBuffer.allocateDirect(9*4*4).order(ByteOrder.nativeOrder()).asIntBuffer();
86 gl.glDrawBuffer(GL.GL_BACK);
87 gl.glReadBuffer( GL.GL_BACK );
88 gl.glPixelStorei( GL.GL_PACK_ALIGNMENT, 1);
90 gl.glDisable(GL.GL_LIGHTING);
91 gl.glShadeModel(GL.GL_FLAT);
93 gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
94 for(Mesh.T t : mesh) t.glTriangle(gl, null);
95 for(Mesh.Vertex v : mesh.vertices()) {
96 Point p = v.getPoint();
98 gl.glBegin(gl.GL_POINTS);
103 Point projected = projection.times(p);
104 gl.glReadPixels((int)projected.x-1, (int)projected.y-1, 3, 3, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, buf);
107 for(int j=0; j<9*4; j++) vis |= buf.get(j)!=0;
111 gl.glBegin(gl.GL_POINTS);
116 gl.glShadeModel(GL.GL_SMOOTH);
117 gl.glEnable(GL.GL_LIGHTING);
118 gl.glDrawBuffer(GL.GL_FRONT);
121 /** return the position of the mouse as a point in window-space */
122 public Point getMouse() {
123 return new Point(mousex, glcanvas.getHeight()-mousey, 0);
126 /** return the position where the mouse button was pressed, or null if it is not currently pressed */
127 public Point getMouseClick() {
131 public void mouseWheelMoved(MouseWheelEvent e) {
132 tz -= e.getWheelRotation();
135 public void keyTyped(KeyEvent e) { }
136 public void keyPressed(KeyEvent e) {
137 switch(e.getKeyCode()) {
138 case KeyEvent.VK_CONTROL: control = true; break;
139 case KeyEvent.VK_ALT: alt = true; break;
140 case KeyEvent.VK_SHIFT: shift = true; break;
144 public void keyReleased(KeyEvent e) {
145 switch(e.getKeyCode()) {
146 case KeyEvent.VK_CONTROL: control = false; break;
147 case KeyEvent.VK_ALT: alt = false; break;
148 case KeyEvent.VK_SHIFT: shift = false; break;
152 public void mouseClicked(MouseEvent e) { }
153 public void mouseEntered(MouseEvent e) { }
154 public void mouseExited(MouseEvent e) { }
155 public void mousePressed(MouseEvent e) {
156 clickPoint = getMouse();
157 clickClosest = closest == null ? null : closest.getPoint();
160 public void mouseReleased(MouseEvent e) {
165 public void mouseMoved(MouseEvent e) {
170 public void mouseDragged(MouseEvent e) {
172 if (closest != null && projection != null && clickClosest != null) {
174 Vec d1 = projection.inverse().times(getMouse()).minus(projection.inverse().times(clickPoint));
175 Vec delta = d1.plus(clickClosest).minus(closest.getPoint());
176 closest.move(delta, false);
180 anglex -= mousex - e.getX();
181 angley += mousey - e.getY();
187 public Viewer(JFrame f) {
189 glcanvas = new GLCanvas();
190 glcanvas.addGLEventListener(this);
191 f.add(glcanvas, BorderLayout.CENTER);
192 glcanvas.addMouseListener(this);
193 glcanvas.addMouseMotionListener(this);
194 glcanvas.addMouseWheelListener(this);
195 glcanvas.addKeyListener(this);
198 public void repaint() {