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Quadrics - NeHe Tutorial JOGL Port E-mail
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This example shows how to use quadrics.

This is the Java port of the one of the NeHe OpenGL tutorials.

You can get complete IntelliJ IDEA project structure (all source, resources, build script, …) by downloading the source distribution from here.

The original post of the programmer who ported the examples can be found here.


Image

package demos.nehe.lesson18;

/*--.          .-"-.
/   o_O        / O o \
\_  (__\       \_ v _/
//   \\        //   \\
((     ))      ((     ))
¤¤¤¤¤¤¤¤¤¤¤¤¤¤--""---""--¤¤¤¤--""---""--¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
¤                 |||            |||                             ¤
¤                  |              |                              ¤
¤                                                                ¤
¤ Programmer:Abdul Bezrati                                       ¤
¤ Program   :Nehe's 18th lesson port to JOGL                     ¤
¤ Comments  :None                                                ¤
¤    _______                                                     ¤
¤  /` _____ `\;,     This e-mail address is being protected from spam bots, you need JavaScript enabled to view it                          ¤
¤ (__(^===^)__)';,                                 ___           ¤
¤   /  :::  \   ,;                               /^   ^\         ¤
¤  |   :::   | ,;'                              ( Ö   Ö )        ¤
¤¤¤'._______.'`¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤ --°oOo--(_)--oOo°--¤¤*/

import demos.common.GLDisplay;

/**
 @author Abdul Bezrati
 */
public class Lesson18 {
    public static void main(String[] args) {
        GLDisplay neheGLDisplay = GLDisplay.createGLDisplay("Lesson 18: Quadrics");
        Renderer renderer = new Renderer();
        InputHandler inputHandler = new InputHandler(renderer, neheGLDisplay);
        neheGLDisplay.addGLEventListener(renderer);
        neheGLDisplay.addKeyListener(inputHandler);
        neheGLDisplay.start();
    }
}


package demos.nehe.lesson18;

import demos.common.GLDisplay;

import javax.swing.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

class InputHandler extends KeyAdapter {
    private Renderer renderer;

    public InputHandler(Renderer renderer, GLDisplay glDisplay) {
        this.renderer = renderer;
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_F, 0)"Switch texture fiulter");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0)"Switch object");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_L, 0)"Toggle lighting");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0)"Zoom in");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0)"Zoom out");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0)"Decrease X-axis rotation speed");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0)"Increase X-axis rotation speed");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0)"Decrease Y-axis rotation speed");
        
        glDisplay.registerKeyStrokeForHelp(
                KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0)"Increase Y-axis rotation speed");
    }

    public void keyPressed(KeyEvent e) {
        processKeyEvent(e, true);
    }

    public void keyReleased(KeyEvent e) {
        switch (e.getKeyCode()) {
            case KeyEvent.VK_F:
                renderer.switchFilter();
                break;
            case KeyEvent.VK_SPACE:
                renderer.switchObject();
                break;
            case KeyEvent.VK_L:
                renderer.toggleLighting();
                break;
            default:
                processKeyEvent(e, false);
        }
    }

    private void processKeyEvent(KeyEvent e, boolean pressed) {
        switch (e.getKeyCode()) {
            case KeyEvent.VK_PAGE_UP:
                renderer.zoomIn(pressed);
                break;
            case KeyEvent.VK_PAGE_DOWN:
                renderer.zoomOut(pressed);
                break;
            case KeyEvent.VK_UP:
                renderer.increaseXspeed(pressed);
                break;
            case KeyEvent.VK_DOWN:
                renderer.decreaseXspeed(pressed);
                break;
            case KeyEvent.VK_RIGHT:
                renderer.increaseYspeed(pressed);
                break;
            case KeyEvent.VK_LEFT:
                renderer.decreaseYspeed(pressed);
                break;
        }
    }
}


package demos.nehe.lesson18;

import demos.common.TextureReader;
import javax.media.opengl.*;
import javax.media.opengl.glu.GLUquadric;
import javax.media.opengl.glu.GLU;

import java.io.IOException;

class Renderer implements GLEventListener {
    private boolean lightingEnabled;    // Lighting ON/OFF

    private float[] lightPosition = {0.0f0.0f2.0f1.0f};
    private float[] lightAmbient = {0.5f0.5f0.5f1.0f};
    private float[] lightDiffuse = {1.0f1.0f1.0f1.0f};

    private float xspeed;               // X Rotation Speed
    private boolean increaseX;
    private boolean decreaseX;

    private float yspeed;               // Y Rotation Speed
    private boolean increaseY;
    private boolean decreaseY;

    private float xrot;                 // X Rotation
    private float yrot;
    private float z = -5f;              // Y Rotation
    private boolean zoomIn;
    private boolean zoomOut;

    private int[] textures = new int[3]// Storage For 3 Textures
    private int object;                  // Which Object To Draw (NEW)
    private int filter;                  // Which Filter To Use
    private int part1;                   // Start Of Disc ( NEW )
    private int part2;                   // End Of Disc ( NEW )
    private int p1 = 0;                  // Increase 1 ( NEW )
    private int p2 = 1;                  // Increase 2 ( NEW )
    private GLU glu = new GLU();

    private GLUquadric quadric;

    public void increaseXspeed(boolean increase) {
        increaseX = increase;
    }

    public void decreaseXspeed(boolean decrease) {
        decreaseX = decrease;
    }

    public void increaseYspeed(boolean increase) {
        increaseY = increase;
    }

    public void decreaseYspeed(boolean decrease) {
        decreaseY = decrease;
    }

    public void zoomIn(boolean zoom) {
        zoomIn = zoom;
    }

    public void zoomOut(boolean zoom) {
        zoomOut = zoom;
    }

    public void switchFilter() {
        filter = (filter + 12;
    }

    public void switchObject() {
        object = (object + 16;
    }

    public void toggleLighting() {
        lightingEnabled = !lightingEnabled;
    }

    private void loadGLTextures(GL gl, GLU glu) {    // Load image And Convert To Textures
        TextureReader.Texture texture;
        try {
            texture = TextureReader.readTexture("demos/data/images/Wall.bmp");
        catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
        gl.glGenTextures(3, textures, 0);  // Create Three Textures
        // Create Nearest Filtered Texture
        gl.glBindTexture(GL.GL_TEXTURE_2D, textures[0]);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
        gl.glTexImage2D(GL.GL_TEXTURE_2D, 03, texture.getWidth()
                texture.getHeight()0, GL.GL_RGB, GL.GL_UNSIGNED_BYTE, texture.getPixels());

        // Create Linear Filtered Texture
        gl.glBindTexture(GL.GL_TEXTURE_2D, textures[1]);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
        gl.glTexImage2D(GL.GL_TEXTURE_2D, 03, texture.getWidth()
                texture.getHeight()0, GL.GL_RGB, GL.GL_UNSIGNED_BYTE, texture.getPixels());

        // Create MipMapped Texture
        gl.glBindTexture(GL.GL_TEXTURE_2D, textures[2]);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, 
                GL.GL_LINEAR_MIPMAP_NEAREST);
        
        glu.gluBuild2DMipmaps(GL.GL_TEXTURE_2D, 3
                texture.getWidth(), texture.getHeight(), GL.GL_RGB, 
                GL.GL_UNSIGNED_BYTE, texture.getPixels());
    }

    public void init(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();

        gl.glEnable(GL.GL_TEXTURE_2D);                             // Enable Texture Mapping
        gl.glShadeModel(GL.GL_SMOOTH);                             // Enable Smooth Shading
        gl.glClearColor(0.0f0.0f0.0f0.5f);                   // Black Background
        gl.glClearDepth(1.0f);                                     // Depth Buffer Setup
        gl.glEnable(GL.GL_DEPTH_TEST);                             // Enables Depth Testing
        
        // The Type Of Depth Testing To Do
        gl.glDepthFunc(GL.GL_LEQUAL);                              
        
        // Really Nice Perspective Calculations
        gl.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);

        gl.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT, lightAmbient, 0);   // Setup The Ambient Light
        gl.glLightfv(GL.GL_LIGHT1, GL.GL_DIFFUSE, lightDiffuse, 0);   // Setup The Diffuse Light
        gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, lightPosition, 0);  // Position The Light
        gl.glEnable(GL.GL_LIGHT1);                                 // Enable Light One

        // Create A Pointer To The Quadric Object (Return 0 If No Memory) (NEW)
        quadric = glu.gluNewQuadric();
        glu.gluQuadricNormals(quadric, GLU.GLU_SMOOTH);  // Create Smooth Normals (NEW)
        glu.gluQuadricTexture(quadric, true);            // Create Texture Coords (NEW)

        loadGLTextures(gl, glu);
    }

    private void glDrawCube(GL gl) {

        gl.glBegin(GL.GL_QUADS);

        gl.glNormal3f(0.0f0.0f1.0f);               // Front Face
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(-1.0f, -1.0f1.0f);
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(1.0f, -1.0f1.0f);
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(1.0f1.0f1.0f);
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(-1.0f1.0f1.0f);

        gl.glNormal3f(0.0f0.0f, -1.0f);                // Back Face
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(-1.0f, -1.0f, -1.0f);
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(-1.0f1.0f, -1.0f);
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(1.0f1.0f, -1.0f);
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(1.0f, -1.0f, -1.0f);

        gl.glNormal3f(0.0f1.0f0.0f);                 // Top Face
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(-1.0f1.0f, -1.0f);
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(-1.0f1.0f1.0f);
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(1.0f1.0f1.0f);
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(1.0f1.0f, -1.0f);

        gl.glNormal3f(0.0f, -1.0f0.0f);              // Bottom Face
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(-1.0f, -1.0f, -1.0f);
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(1.0f, -1.0f, -1.0f);
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(1.0f, -1.0f1.0f);
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(-1.0f, -1.0f1.0f);

        gl.glNormal3f(1.0f0.0f0.0f);               // Right Face
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(1.0f, -1.0f, -1.0f);
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(1.0f1.0f, -1.0f);
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(1.0f1.0f1.0f);
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(1.0f, -1.0f1.0f);

        gl.glNormal3f(-1.0f0.0f0.0f);               // Left Face
        gl.glTexCoord2f(0.0f0.0f);
        gl.glVertex3f(-1.0f, -1.0f, -1.0f);
        gl.glTexCoord2f(1.0f0.0f);
        gl.glVertex3f(-1.0f, -1.0f1.0f);
        gl.glTexCoord2f(1.0f1.0f);
        gl.glVertex3f(-1.0f1.0f1.0f);
        gl.glTexCoord2f(0.0f1.0f);
        gl.glVertex3f(-1.0f1.0f, -1.0f);
        gl.glEnd();
    }

    private void update() {
        if (zoomOut)
            z -= 0.02f;
        if (zoomIn)
            z += 0.02f;
        if (decreaseX)
            xspeed -= 0.01f;
        if (increaseX)
            xspeed += 0.01f;
        if (increaseY)
            yspeed += 0.01f;
        if (decreaseY)
            yspeed -= 0.01f;
    }

    public void display(GLAutoDrawable drawable) {
        update();
        GL gl = drawable.getGL();

        if (!lightingEnabled)
            gl.glDisable(GL.GL_LIGHTING);
        else
            gl.glEnable(GL.GL_LIGHTING);

        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        gl.glLoadIdentity()// Reset The View
        gl.glTranslatef(0.0f0.0f, z);

        gl.glRotatef(xrot, 1.0f0.0f0.0f);
        gl.glRotatef(yrot, 0.0f1.0f0.0f);

        gl.glBindTexture(GL.GL_TEXTURE_2D, textures[filter]);

        switch (object) {

            case 0:
                glDrawCube(gl);
                break;
            case 1:
                gl.glTranslatef(0.0f0.0f, -1.5f);  // Center The Cylinder
                
                // A Cylinder With A Radius Of 0.5 And A Height Of 2
                glu.gluCylinder(quadric, 1.0f1.0f3.0f3232);  
                break;
            case 2:                
                // Draw A Disc (CD Shape) With An Inner Radius Of 0.5, 
    // And An Outer Radius Of 2.  Plus A Lot Of Segments ;)
                glu.gluDisk(quadric, 0.5f1.5f3232);             
                break;
            case 3:
                // Draw A Sphere With A Radius Of 1 And 16 
    // Longitude And 16 Latitude Segments
                glu.gluSphere(quadric, 1.3f3232);                
                break;
            case 4:
                gl.glTranslatef(0.0f0.0f, -1.5f);   // Center The Cone
                // A Cone With A Bottom Radius Of .5 And A Height Of 2
                glu.gluCylinder(quadric, 1.0f0.0f3.0f3232);    
                break;
            case 5:
                part1 += p1;
                part2 += p2;

                if (part1 > 359) {  // 360 Degrees
                    p1 = 0;
                    part1 = 0;
                    p2 = 1;
                    part2 = 0;
                }

                if (part2 > 359) { // 360 Degrees
                    p1 = 1;
                    p2 = 0;
                }
                glu.gluPartialDisk(quadric, 0.5f1.5f3232
                        part1, part2 - part1);  // A Disk Like The One Before
                break;
        }

        xrot += xspeed;
        yrot += yspeed;
    }

    public void reshape(GLAutoDrawable drawable,
                        int xstart,
                        int ystart,
                        int width,
                        int height) {
        GL gl = drawable.getGL();

        height = (height == 0: height;

        gl.glViewport(00, width, height);
        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();

        glu.gluPerspective(45(floatwidth / height, 11000);
        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();
    }

    public void displayChanged(GLAutoDrawable drawable,
                               boolean modeChanged,
                               boolean deviceChanged) {
    }
}

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