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-rw-r--r--demos/MiscDemos/gearRenderer.java348
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diff --git a/demos/MiscDemos/gearRenderer.java b/demos/MiscDemos/gearRenderer.java
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+/**
+ * @(#) gears.java
+ * @(#) author: Brian Paul (converted to Java by Ron Cemer and Sven Goethel)
+ *
+ * This version is equal to Brian Paul's version 1.2 1999/10/21
+ */
+
+import java.awt.*;
+import java.awt.event.*;
+import java.lang.*;
+import java.util.*;
+import java.io.*;
+import gl4java.*;
+import gl4java.awt.*;
+import gl4java.drawable.*;
+
+/* Local GLAnimCanvas extension class */
+
+public class gearRenderer
+ implements GLEventListener, MouseListener, MouseMotionListener
+{
+ private static final float M_PI = 3.14159265f;
+
+ private long T0 = 0;
+ private long Frames = 0;
+
+ 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;
+
+ private boolean showGL = false;
+
+ private GLFunc gl;
+ private GLUFunc glu;
+ private GLContext glj;
+ private GLDrawable gldrawable;
+
+ public gearRenderer(boolean showGL)
+ {
+ this.showGL=showGL;
+ }
+
+ public void init(GLDrawable drawable)
+ {
+ gl = drawable.getGL();
+ glu = drawable.getGLU();
+ glj = drawable.getGLContext();
+ this.gldrawable = drawable;
+
+ 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(GL_LIGHT0, GL_POSITION, pos);
+ gl.glEnable(GL_CULL_FACE);
+ gl.glEnable(GL_LIGHTING);
+ gl.glEnable(GL_LIGHT0);
+ gl.glEnable(GL_DEPTH_TEST);
+
+ /* make the gears */
+ gear1 = gl.glGenLists(1);
+ gl.glNewList(gear1, GL_COMPILE);
+ gl.glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+ gear(1.0f, 4.0f, 1.0f, 20, 0.7f);
+ gl.glEndList();
+
+ gear2 = gl.glGenLists(1);
+ gl.glNewList(gear2, GL_COMPILE);
+ gl.glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+ gear(0.5f, 2.0f, 2.0f, 10, 0.7f);
+ gl.glEndList();
+
+ gear3 = gl.glGenLists(1);
+ gl.glNewList(gear3, GL_COMPILE);
+ gl.glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+ gear(1.3f, 2.0f, 0.5f, 10, 0.7f);
+ gl.glEndList();
+
+ gl.glEnable(GL_NORMALIZE);
+
+ glj.gljCheckGL();
+
+ drawable.addMouseListener(this);
+ drawable.addMouseMotionListener(this);
+
+ T0=System.currentTimeMillis();
+ }
+
+ public void cleanup(GLDrawable drawable)
+ {
+ System.out.println("destroy(): " + this);
+ drawable.removeMouseListener(this);
+ drawable.removeMouseMotionListener(this);
+ }
+
+ public void reshape(gl4java.drawable.GLDrawable gld,int width,int height)
+ {
+ float h = (float)height / (float)width;
+
+ gl.glViewport(0,0,width,height);
+ gl.glMatrixMode(GL_PROJECTION);
+ gl.glLoadIdentity();
+ gl.glFrustum(-1.0f, 1.0f, -h, h, 5.0f, 60.0f);
+ gl.glMatrixMode(GL_MODELVIEW);
+ gl.glLoadIdentity();
+ gl.glTranslatef(0.0f, 0.0f, -40.0f);
+ }
+
+ public void display(GLDrawable drawable)
+ {
+ if(showGL)
+ {
+ showGL=false;
+ System.out.println("GL VERSION : "+gl.glGetString(GL_VERSION));
+ System.out.println("GL RENDERER: "+gl.glGetString(GL_RENDERER));
+ System.out.println("GL VENDOR : "+gl.glGetString(GL_VENDOR));
+ }
+
+ angle += 2.0f;
+
+ gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ 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);
+
+ gl.glPushMatrix();
+ gl.glTranslatef(-3.0f, -2.0f, 0.0f);
+ gl.glRotatef(angle, 0.0f, 0.0f, 1.0f);
+ gl.glCallList(gear1);
+ gl.glPopMatrix();
+
+ 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();
+
+ 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();
+
+ gl.glPopMatrix();
+
+ Frames++;
+ }
+
+ public void preDisplay(GLDrawable drawable)
+ {
+ }
+
+ public void postDisplay(GLDrawable drawable)
+ {
+ long t=System.currentTimeMillis();
+ if(t - T0 >= 5000)
+ {
+ double seconds = (double)(t - T0) / 1000.0;
+ double fps = (double)Frames / seconds;
+ System.out.println(Frames+" frames in "+seconds+" seconds = "+
+ fps+" FPS");
+ T0 = t;
+ Frames = 0;
+ }
+ }
+
+ private void gear
+ (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 * M_PI / teeth / 4.0f;
+
+ gl.glShadeModel(GL_FLAT);
+
+ gl.glNormal3f(0.0f, 0.0f, 1.0f);
+
+ /* draw front face */
+ gl.glBegin(GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * M_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(GL_QUADS);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * M_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(GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * M_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(GL_QUADS);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * M_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(GL_QUAD_STRIP);
+ for (i = 0; i < teeth; i++)
+ {
+ angle = i * 2.0f * M_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(GL_SMOOTH);
+
+ /* draw inside radius cylinder */
+ gl.glBegin(GL_QUAD_STRIP);
+ for (i = 0; i <= teeth; i++)
+ {
+ angle = i * 2.0f * M_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 evt )
+ {
+ //System.out.println("mouse entered cvs: ");
+ }
+
+ public void mouseExited( MouseEvent evt )
+ {
+ //System.out.println("mouse exit cvs: ");
+ }
+
+ public void mousePressed( MouseEvent evt )
+ {
+ //System.out.println("mouse pressed cvs: ");
+ prevMouseX = evt.getX();
+ prevMouseY = evt.getY();
+ if ((evt.getModifiers() & evt.BUTTON3_MASK) != 0)
+ {
+ mouseRButtonDown = true;
+ }
+ }
+
+ public void mouseReleased( MouseEvent evt )
+ {
+ //System.out.println("mouse released cvs: ");
+ if ((evt.getModifiers() & evt.BUTTON3_MASK) != 0)
+ {
+ mouseRButtonDown = false;
+ }
+ }
+
+ public void mouseClicked( MouseEvent evt )
+ {
+ //System.out.println("mouse clicked cvs: ");
+ }
+
+ // Methods required for the implementation of MouseMotionListener
+ public void mouseDragged( MouseEvent evt )
+ {
+ //System.out.println("mouse dragged: ");
+ int x = evt.getX();
+ int y = evt.getY();
+ Dimension size = gldrawable.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 evt )
+ {
+ //System.out.println("mouse moved: ");
+ }
+}
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