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-rw-r--r--src/demos/gears/Gears.java339
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diff --git a/src/demos/gears/Gears.java b/src/demos/gears/Gears.java
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+package demos.gears;
+
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES1;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GLAutoDrawable;
+import javax.media.opengl.GLEventListener;
+import javax.media.opengl.awt.AWTGLAutoDrawable;
+import javax.media.opengl.awt.GLCanvas;
+import javax.media.opengl.awt.GLJPanel;
+import com.sun.opengl.util.Animator;
+
+/**
+ * Gears.java <BR>
+ * author: Brian Paul (converted to Java by Ron Cemer and Sven Goethel) <P>
+ *
+ * This version is equal to Brian Paul's version 1.2 1999/10/21
+ */
+
+public class Gears implements GLEventListener, MouseListener, MouseMotionListener {
+ public static void main(String[] args) {
+ Frame frame = new Frame("Gear Demo");
+ GLCanvas canvas = new GLCanvas();
+
+ final Gears gears = new Gears();
+ canvas.addGLEventListener(gears);
+
+ frame.add(canvas);
+ frame.setSize(300, 300);
+ final Animator animator = new Animator(canvas);
+ frame.addWindowListener(new WindowAdapter() {
+ public void windowClosing(WindowEvent e) {
+ // Run this on another thread than the AWT event queue to
+ // make sure the call to Animator.stop() completes before
+ // exiting
+ new Thread(new Runnable() {
+ public void run() {
+ animator.stop();
+ System.exit(0);
+ }
+ }).start();
+ }
+ });
+ frame.setVisible(true);
+ animator.start();
+ }
+
+ private float view_rotx = 20.0f, view_roty = 30.0f, view_rotz = 0.0f;
+ private int gear1, gear2, gear3;
+ private float angle = 0.0f;
+
+ private int prevMouseX, prevMouseY;
+ private boolean mouseRButtonDown = false;
+
+ public void init(GLAutoDrawable drawable) {
+ // Use debug pipeline
+ // drawable.setGL(new DebugGL(drawable.getGL()));
+
+ GL2 gl = drawable.getGL().getGL2();
+
+ System.err.println("INIT GL IS: " + gl.getClass().getName());
+
+ System.err.println("Chosen GLCapabilities: " + drawable.getChosenGLCapabilities());
+
+ gl.setSwapInterval(1);
+
+ float pos[] = { 5.0f, 5.0f, 10.0f, 0.0f };
+ float red[] = { 0.8f, 0.1f, 0.0f, 1.0f };
+ float green[] = { 0.0f, 0.8f, 0.2f, 1.0f };
+ float blue[] = { 0.2f, 0.2f, 1.0f, 1.0f };
+
+ gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_POSITION, pos, 0);
+ gl.glEnable(GL2.GL_CULL_FACE);
+ gl.glEnable(GL2.GL_LIGHTING);
+ gl.glEnable(GL2.GL_LIGHT0);
+ gl.glEnable(GL2.GL_DEPTH_TEST);
+
+ /* make the gears */
+ gear1 = gl.glGenLists(1);
+ gl.glNewList(gear1, GL2.GL_COMPILE);
+ gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, red, 0);
+ gear(gl, 1.0f, 4.0f, 1.0f, 20, 0.7f);
+ gl.glEndList();
+
+ gear2 = gl.glGenLists(1);
+ gl.glNewList(gear2, GL2.GL_COMPILE);
+ gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, green, 0);
+ gear(gl, 0.5f, 2.0f, 2.0f, 10, 0.7f);
+ gl.glEndList();
+
+ gear3 = gl.glGenLists(1);
+ gl.glNewList(gear3, GL2.GL_COMPILE);
+ gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, blue, 0);
+ gear(gl, 1.3f, 2.0f, 0.5f, 10, 0.7f);
+ gl.glEndList();
+
+ gl.glEnable(GL2.GL_NORMALIZE);
+
+ if (drawable instanceof AWTGLAutoDrawable) {
+ AWTGLAutoDrawable awtDrawable = (AWTGLAutoDrawable) drawable;
+ awtDrawable.addMouseListener(this);
+ awtDrawable.addMouseMotionListener(this);
+ }
+ }
+
+ public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
+ GL2 gl = drawable.getGL().getGL2();
+
+ float h = (float)height / (float)width;
+
+ gl.glMatrixMode(GL2.GL_PROJECTION);
+
+ System.err.println("GL_VENDOR: " + gl.glGetString(GL2.GL_VENDOR));
+ System.err.println("GL_RENDERER: " + gl.glGetString(GL2.GL_RENDERER));
+ System.err.println("GL_VERSION: " + gl.glGetString(GL2.GL_VERSION));
+ gl.glLoadIdentity();
+ gl.glFrustum(-1.0f, 1.0f, -h, h, 5.0f, 60.0f);
+ gl.glMatrixMode(GL2.GL_MODELVIEW);
+ gl.glLoadIdentity();
+ gl.glTranslatef(0.0f, 0.0f, -40.0f);
+ }
+
+ public void dispose(GLAutoDrawable drawable) {
+ System.out.println("Gears.dispose: "+drawable);
+ }
+
+ public void display(GLAutoDrawable drawable) {
+ // Turn the gears' teeth
+ angle += 2.0f;
+
+ // Get the GL corresponding to the drawable we are animating
+ GL2 gl = drawable.getGL().getGL2();
+
+ // Special handling for the case where the GLJPanel is translucent
+ // and wants to be composited with other Java 2D content
+ if ((drawable instanceof GLJPanel) &&
+ !((GLJPanel) drawable).isOpaque() &&
+ ((GLJPanel) drawable).shouldPreserveColorBufferIfTranslucent()) {
+ gl.glClear(GL2.GL_DEPTH_BUFFER_BIT);
+ } else {
+ gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
+ }
+
+ // Rotate the entire assembly of gears based on how the user
+ // dragged the mouse around
+ gl.glPushMatrix();
+ gl.glRotatef(view_rotx, 1.0f, 0.0f, 0.0f);
+ gl.glRotatef(view_roty, 0.0f, 1.0f, 0.0f);
+ gl.glRotatef(view_rotz, 0.0f, 0.0f, 1.0f);
+
+ // Place the first gear and call its display list
+ gl.glPushMatrix();
+ gl.glTranslatef(-3.0f, -2.0f, 0.0f);
+ gl.glRotatef(angle, 0.0f, 0.0f, 1.0f);
+ gl.glCallList(gear1);
+ gl.glPopMatrix();
+
+ // Place the second gear and call its display list
+ gl.glPushMatrix();
+ gl.glTranslatef(3.1f, -2.0f, 0.0f);
+ gl.glRotatef(-2.0f * angle - 9.0f, 0.0f, 0.0f, 1.0f);
+ gl.glCallList(gear2);
+ gl.glPopMatrix();
+
+ // Place the third gear and call its display list
+ gl.glPushMatrix();
+ gl.glTranslatef(-3.1f, 4.2f, 0.0f);
+ gl.glRotatef(-2.0f * angle - 25.0f, 0.0f, 0.0f, 1.0f);
+ gl.glCallList(gear3);
+ gl.glPopMatrix();
+
+ // Remember that every push needs a pop; this one is paired with
+ // rotating the entire gear assembly
+ gl.glPopMatrix();
+ }
+
+ public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {}
+
+ public static void gear(GL2 gl,
+ float inner_radius,
+ float outer_radius,
+ float width,
+ int teeth,
+ float tooth_depth)
+ {
+ int i;
+ float r0, r1, r2;
+ float angle, da;
+ float u, v, len;
+
+ r0 = inner_radius;
+ r1 = outer_radius - tooth_depth / 2.0f;
+ r2 = outer_radius + tooth_depth / 2.0f;
+
+ da = 2.0f * (float) Math.PI / teeth / 4.0f;
+
+ gl.glShadeModel(GL2.GL_FLAT);
+
+ gl.glNormal3f(0.0f, 0.0f, 1.0f);
+
+ /* draw front face */
+ gl.glBegin(GL2.GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), width * 0.5f);
+ if(i < teeth)
+ {
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3.0f * da), r1 * (float)Math.sin(angle + 3.0f * da), width * 0.5f);
+ }
+ }
+ gl.glEnd();
+
+ /* draw front sides of teeth */
+ gl.glBegin(GL2.GL_QUADS);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + da), r2 * (float)Math.sin(angle + da), width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + 2.0f * da), r2 * (float)Math.sin(angle + 2.0f * da), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3.0f * da), r1 * (float)Math.sin(angle + 3.0f * da), width * 0.5f);
+ }
+ gl.glEnd();
+
+ /* draw back face */
+ gl.glBegin(GL2.GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), -width * 0.5f);
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), -width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3 * da), r1 * (float)Math.sin(angle + 3 * da), -width * 0.5f);
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), -width * 0.5f);
+ }
+ gl.glEnd();
+
+ /* draw back sides of teeth */
+ gl.glBegin(GL2.GL_QUADS);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3 * da), r1 * (float)Math.sin(angle + 3 * da), -width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + 2 * da), r2 * (float)Math.sin(angle + 2 * da), -width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + da), r2 * (float)Math.sin(angle + da), -width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), -width * 0.5f);
+ }
+ gl.glEnd();
+
+ /* draw outward faces of teeth */
+ gl.glBegin(GL2.GL_QUAD_STRIP);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle), r1 * (float)Math.sin(angle), -width * 0.5f);
+ u = r2 * (float)Math.cos(angle + da) - r1 * (float)Math.cos(angle);
+ v = r2 * (float)Math.sin(angle + da) - r1 * (float)Math.sin(angle);
+ len = (float)Math.sqrt(u * u + v * v);
+ u /= len;
+ v /= len;
+ gl.glNormal3f(v, -u, 0.0f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + da), r2 * (float)Math.sin(angle + da), width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + da), r2 * (float)Math.sin(angle + da), -width * 0.5f);
+ gl.glNormal3f((float)Math.cos(angle), (float)Math.sin(angle), 0.0f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + 2 * da), r2 * (float)Math.sin(angle + 2 * da), width * 0.5f);
+ gl.glVertex3f(r2 * (float)Math.cos(angle + 2 * da), r2 * (float)Math.sin(angle + 2 * da), -width * 0.5f);
+ u = r1 * (float)Math.cos(angle + 3 * da) - r2 * (float)Math.cos(angle + 2 * da);
+ v = r1 * (float)Math.sin(angle + 3 * da) - r2 * (float)Math.sin(angle + 2 * da);
+ gl.glNormal3f(v, -u, 0.0f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3 * da), r1 * (float)Math.sin(angle + 3 * da), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(angle + 3 * da), r1 * (float)Math.sin(angle + 3 * da), -width * 0.5f);
+ gl.glNormal3f((float)Math.cos(angle), (float)Math.sin(angle), 0.0f);
+ }
+ gl.glVertex3f(r1 * (float)Math.cos(0), r1 * (float)Math.sin(0), width * 0.5f);
+ gl.glVertex3f(r1 * (float)Math.cos(0), r1 * (float)Math.sin(0), -width * 0.5f);
+ gl.glEnd();
+
+ gl.glShadeModel(GL2.GL_SMOOTH);
+
+ /* draw inside radius cylinder */
+ gl.glBegin(GL2.GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * (float) Math.PI / teeth;
+ gl.glNormal3f(-(float)Math.cos(angle), -(float)Math.sin(angle), 0.0f);
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), -width * 0.5f);
+ gl.glVertex3f(r0 * (float)Math.cos(angle), r0 * (float)Math.sin(angle), width * 0.5f);
+ }
+ gl.glEnd();
+ }
+
+ // Methods required for the implementation of MouseListener
+ public void mouseEntered(MouseEvent e) {}
+ public void mouseExited(MouseEvent e) {}
+
+ public void mousePressed(MouseEvent e) {
+ prevMouseX = e.getX();
+ prevMouseY = e.getY();
+ if ((e.getModifiers() & e.BUTTON3_MASK) != 0) {
+ mouseRButtonDown = true;
+ }
+ }
+
+ public void mouseReleased(MouseEvent e) {
+ if ((e.getModifiers() & e.BUTTON3_MASK) != 0) {
+ mouseRButtonDown = false;
+ }
+ }
+
+ public void mouseClicked(MouseEvent e) {}
+
+ // Methods required for the implementation of MouseMotionListener
+ public void mouseDragged(MouseEvent e) {
+ int x = e.getX();
+ int y = e.getY();
+ Dimension size = e.getComponent().getSize();
+
+ float thetaY = 360.0f * ( (float)(x-prevMouseX)/(float)size.width);
+ float thetaX = 360.0f * ( (float)(prevMouseY-y)/(float)size.height);
+
+ prevMouseX = x;
+ prevMouseY = y;
+
+ view_rotx += thetaX;
+ view_roty += thetaY;
+ }
+
+ public void mouseMoved(MouseEvent e) {}
+}
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