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| import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL3;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.awt.GLJPanel;
import javax.swing.JFrame;
import com.jogamp.opengl.util.Animator;
public class testGL implements GLEventListener {
public static void main(String args[]) {
GLProfile profile = GLProfile.get(GLProfile.GL2);
// configure context
GLCapabilities capabilities = new GLCapabilities(profile);
capabilities.setNumSamples(2); // enable anti aliasing - just as a
// example
capabilities.setSampleBuffers(true);
// initialize a GLDrawable of your choice
GLCanvas canvas = new GLCanvas(capabilities);
// register GLEventListener
testGL testGL2 = new testGL();
canvas.addGLEventListener(testGL2);
Animator a = new Animator(canvas);
a.start();
// ... (start rendering thread -> start rendering...)
JFrame frame = new JFrame();
frame.add(canvas);
frame.setVisible(true);
}
private float angle;
private float view_rotx = 20.0f, view_roty = 30.0f, view_rotz = 0.0f;
@Override
public void display(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
// Turn the gears' teeth
angle += 2.0f;
// 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
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.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.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, blue, 0);
gear(gl, 1.0f, 4.0f, 1.0f, 20, 0.7f);
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.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, green, 0);
gear(gl, 0.5f, 2.0f, 2.0f, 10, 0.7f);
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.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, red, 0);
gear(gl, 1.3f, 2.0f, 0.5f, 10, 0.7f);
gl.glPopMatrix();
// Remember that every push needs a pop; this one is paired with
// rotating the entire gear assembly
gl.glPopMatrix();
}
@Override
public void dispose(GLAutoDrawable arg0) {
// TODO Auto-generated method stub
}
@Override
public void init(GLAutoDrawable drawable) {
GL3 gl = drawable.getGL().getGL3();
System.err.println("INIT GL IS: " + gl.getClass().getName());
System.err.println("Chosen GLCapabilities: " + drawable.getChosenGLCapabilities());
gl.setSwapInterval(1);
// gl.glLightfv(GL3.GL_LIGHT0, GL3.GL_POSITION, pos, 0);
gl.glEnable(GL3.GL_CULL_FACE);
// gl.glEnable(GL3.GL_LIGHTING);
// gl.glEnable(GL3.GL_LIGHT0);
gl.glEnable(GL3.GL_DEPTH_TEST);
/* make the gears */
// int gear1 = gl.glGenLists(1);
// gl.glNewList(gear1, GL2.GL_COMPILE);
// gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, red, 0);
// gl.glEndList();
// int gear2 = gl.glGenLists(1);
// // gl.glNewList(gear2, GL2.GL_COMPILE);
// gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, green, 0);
// gl.glEndList();
// int gear3 = gl.glGenLists(1);
// gl.glNewList(gear3, GL2.GL_COMPILE);
// gl.glMaterialfv(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE, blue, 0);
// gl.glEndList();
gl.glEnable(GL2.GL_NORMALIZE);
/*
* if (drawable instanceof AWTGLAutoDrawable) { AWTGLAutoDrawable
* awtDrawable = (AWTGLAutoDrawable) drawable;
* awtDrawable.addMouseListener(this);
* awtDrawable.addMouseMotionListener(this); }
*/
}
@Override
public void reshape(GLAutoDrawable drawable, int arg1, int arg2, int arg3, int arg4) {
GL2 gl = drawable.getGL().getGL2();
float h = (float) 600 / (float) 800;
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 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();
}
} |
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