diff options
Diffstat (limited to 'demos/RonsDemos/gears.java')
| -rw-r--r-- | demos/RonsDemos/gears.java | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/demos/RonsDemos/gears.java b/demos/RonsDemos/gears.java new file mode 100644 index 0000000..cdc1634 --- /dev/null +++ b/demos/RonsDemos/gears.java @@ -0,0 +1,432 @@ +/**
+ * @(#) gears.java
+ * @(#) author: Brian Paul (converted to Java by Ron Cemer)
+ */
+
+import java.applet.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.lang.*;
+import java.util.*;
+import java.io.*;
+import java.util.*;
+import gl4java.GLContext;
+import gl4java.awt.GLAnimCanvas;
+import gl4java.applet.SimpleGLAnimApplet1;
+
+public class gears extends SimpleGLAnimApplet1
+{
+
+ /* Initialize the applet */
+
+
+ public void init()
+ {
+ super.init();
+ Dimension d = getSize();
+ canvas = new gearsCanvas(d.width, d.height);
+ add("Center", canvas);
+ }
+
+
+ public static void main( String args[] )
+ {
+ Frame mainFrame = new Frame("gears");
+
+ gears applet = new gears();
+
+ applet.setSize(400, 400);
+ applet.init();
+ applet.start();
+
+ mainFrame.add(applet);
+
+ mainFrame.pack();
+ mainFrame.setVisible(true);
+ }
+
+
+ /* Local GLAnimCanvas extension class */
+
+
+ private class gearsCanvas extends GLAnimCanvas implements MouseListener, MouseMotionListener
+ {
+ private static final float M_PI = 3.14159265359f;
+ private int gear1, gear2, gear3;
+ private float angle = 0.0f;
+
+ private MatrixFuncs mtxfuncs = null;
+ private int prevMouseX, prevMouseY;
+ private boolean mouseRButtonDown = false;
+ private float rot_matrix[] =
+ {
+ 1.0f, 0.0f, 0.0f, 0.0f,
+ 0.0f, 1.0f, 0.0f, 0.0f,
+ 0.0f, 0.0f, 1.0f, 0.0f,
+ 0.0f, 0.0f, 0.0f, 1.0f
+ };
+
+ public gearsCanvas(int w, int h)
+ {
+ super(w, h);
+ GLContext.gljNativeDebug = false;
+ GLContext.gljClassDebug = false;
+ setAnimateFps(30.0);
+
+ mtxfuncs = new MatrixFuncs();
+ }
+
+ public void preInit()
+ {
+ doubleBuffer = true;
+ stereoView = false;
+ }
+
+ public void init()
+ {
+ System.out.println("init(): " + this);
+ reshape(getSize().width, getSize().height);
+
+ setInitialRotation();
+
+ 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();
+
+ addMouseListener(this);
+ addMouseMotionListener(this);
+ }
+
+ public void doCleanup()
+ {
+ System.out.println("destroy(): " + this);
+ removeMouseListener(this);
+ removeMouseMotionListener(this);
+ }
+
+ public void reshape(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()
+ {
+ if (glj.gljMakeCurrent() == false) return;
+
+ angle += 0.5f;
+
+ gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ gl.glPushMatrix();
+ gl.glMultMatrixf(rot_matrix);
+
+ 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();
+
+ glj.gljSwap();
+ glj.gljCheckGL();
+ glj.gljFree();
+
+ //if (!isSuspended()) repaint(); // Animate at full speed.
+ }
+
+ 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);
+ 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);
+ da = 2.0f * M_PI / teeth / 4.0f;
+ 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();
+
+ gl.glNormal3f(0.0f, 0.0f, -1.0f);
+
+ /* 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);
+ da = 2.0f * M_PI / teeth / 4.0f;
+ 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();
+ }
+
+ // Reset the rotation matrix to the default view.
+ private void setInitialRotation()
+ {
+ float mtxbuf[] = new float[16];
+ float mtxbuf2[] = new float[16];
+
+ mtxfuncs.rotateAroundY(30.0f,mtxbuf);
+ mtxfuncs.rotateAroundX(20.0f,mtxbuf2);
+ mtxfuncs.multiplyMatrices(mtxbuf2,mtxbuf,rot_matrix);
+ fixRotationMatrix();
+ }
+
+ private void fixRotationMatrix()
+ {
+ // Fix any problems with the rotation matrix.
+ rot_matrix[3] =
+ rot_matrix[7] =
+ rot_matrix[11] =
+ rot_matrix[12] =
+ rot_matrix[13] =
+ rot_matrix[14] = 0.0f;
+ rot_matrix[15] = 1.0f;
+ float fac;
+ if ((fac = (float)Math.sqrt
+ ((rot_matrix[0]*rot_matrix[0]) +
+ (rot_matrix[4]*rot_matrix[4]) +
+ (rot_matrix[8]*rot_matrix[8]))) != 1.0f)
+ {
+ if (fac != 0.0f)
+ {
+ fac = 1.0f/fac;
+ rot_matrix[0] *= fac;
+ rot_matrix[4] *= fac;
+ rot_matrix[8] *= fac;
+ }
+ }
+ if ((fac = (float)Math.sqrt
+ ((rot_matrix[1]*rot_matrix[1]) +
+ (rot_matrix[5]*rot_matrix[5]) +
+ (rot_matrix[9]*rot_matrix[9]))) != 1.0f)
+ {
+ if (fac != 0.0f)
+ {
+ fac = 1.0f/fac;
+ rot_matrix[1] *= fac;
+ rot_matrix[5] *= fac;
+ rot_matrix[9] *= fac;
+ }
+ }
+ if ((fac = (float)Math.sqrt
+ ((rot_matrix[2]*rot_matrix[2]) +
+ (rot_matrix[6]*rot_matrix[6]) +
+ (rot_matrix[10]*rot_matrix[10]))) != 1.0f)
+ {
+ if (fac != 0.0f)
+ {
+ fac = 1.0f/fac;
+ rot_matrix[2] *= fac;
+ rot_matrix[6] *= fac;
+ rot_matrix[10] *= fac;
+ }
+ }
+ }
+
+ // Methods required for the implementation of MouseListener
+ public void mouseEntered( MouseEvent evt )
+ {
+ }
+
+ public void mouseExited( MouseEvent evt )
+ {
+ }
+
+ public void mousePressed( MouseEvent evt )
+ {
+ prevMouseX = evt.getX();
+ prevMouseY = evt.getY();
+ if ((evt.getModifiers() & evt.BUTTON3_MASK) != 0)
+ {
+ mouseRButtonDown = true;
+ evt.consume();
+ }
+ }
+
+ public void mouseReleased( MouseEvent evt )
+ {
+ if ((evt.getModifiers() & evt.BUTTON3_MASK) != 0)
+ {
+ mouseRButtonDown = false;
+ evt.consume();
+ }
+ }
+
+ public void mouseClicked( MouseEvent evt )
+ {
+ }
+
+ // Methods required for the implementation of MouseMotionListener
+ public void mouseDragged( MouseEvent evt )
+ {
+ int x = evt.getX();
+ int y = evt.getY();
+ float thetaX = (float)(x-prevMouseX)*(360.0f/(float)getSize().width);
+ float thetaY = (float)(prevMouseY-y)*(360.0f/(float)getSize().height);
+ float mtxbuf[] = new float[16];
+ float mtxbuf2[] = new float[16];
+
+ prevMouseX = x;
+ prevMouseY = y;
+ if ( (thetaX != 0.0f) || (thetaY != 0.0f) )
+ {
+ mtxfuncs.rotateAroundY(((float)thetaX),mtxbuf);
+ if (mouseRButtonDown)
+ mtxfuncs.rotateAroundZ(thetaY,mtxbuf2);
+ else
+ mtxfuncs.rotateAroundX(-thetaY,mtxbuf2);
+ mtxfuncs.multiplyMatrices(mtxbuf2,mtxbuf,mtxbuf);
+ mtxfuncs.multiplyMatrices(rot_matrix,mtxbuf,rot_matrix);
+ fixRotationMatrix();
+ }
+ evt.consume();
+ }
+
+ public void mouseMoved( MouseEvent evt )
+ {
+ }
+ }
+}
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