and am on tutorial 6 in eclipse. I've copied the image files themselves into every single folder in my eclipse workspace (I'm posting here in desperation after trying everything I can think of and beating my head against the wall for really a very long time).
When I run my code it just instantly closes with the following error:
Detected screen size 1920x1200
Exception in thread "Timer-0" java.lang.NullPointerException
at learning.Tutorial_06.loadTexture(Tutorial_06.java:236)
at learning.Tutorial_06.access$1(Tutorial_06.java:230)
at learning.Tutorial_06$2.init(Tutorial_06.java:73)
at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:132)
at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:170)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:159)
at com.jogamp.newt.opengl.GLWindow$DisplayAction.run(GLWindow.java:588)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:343)
at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:534)
at com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:74)
at com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:142)
at com.jogamp.opengl.util.FPSAnimator$1.run(FPSAnimator.java:128)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Code attached:
package learning;
import com.jogamp.newt.event.KeyAdapter;
import com.jogamp.newt.event.KeyEvent;
import com.jogamp.newt.event.WindowAdapter;
import com.jogamp.newt.event.WindowEvent;
import com.jogamp.newt.opengl.GLWindow;
import com.jogamp.opengl.util.FPSAnimator;
import com.jogamp.opengl.util.texture.Texture;
import com.jogamp.opengl.util.texture.TextureIO;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.glu.GLU;
/**
*
* @author Sebastiaan
*/
public class Tutorial_06 {
private GLWindow window;
private boolean fullscreen = false;
private float xrot; // X Rotation ( NEW )
private float yrot; // Y Rotation ( NEW )
private float zrot; // Z Rotation ( NEW )
private Texture cubeTexture; // Stores our BMP as texture (NEW)
public Tutorial_06() {
// Choose the GL profile
GLProfile glp = GLProfile.getMaxFixedFunc();
// Configure the GL capabilities
GLCapabilities caps = new GLCapabilities(glp);
// Create a new GL NEWT window with the GL capabilities
window = GLWindow.create(caps);
window.setSize(400, 300);
window.setVisible(true);
window.setTitle("Tutorial 6: Texture Mapping");
window.addWindowListener(new WindowAdapter() {
@Override
public void windowDestroyNotify(WindowEvent arg0) {
closeTutorial();
};
});
// Add a GL eventlistener to the window
window.addGLEventListener(new GLEventListener() {
/**
* This method is called when we first create our opengl window
*/
@Override
public void init(GLAutoDrawable drawable) {
final GL2 gl = drawable.getGL().getGL2();
gl.glClearDepth(1.0f); // Depth Buffer Setup
gl.glEnable(GL2.GL_DEPTH_TEST); // Enables Depth Testing
gl.glDepthFunc(GL2.GL_LEQUAL); // The Type Of Depth Testing To Do
gl.glHint(GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL2.GL_NICEST); // Really Nice Perspective Calculations
gl.glShadeModel(GL2.GL_SMOOTH);
// load the texture for the cube (NEW)
cubeTexture = loadTexture();
// Something went wrong loading texture, return to selecting menu (NEW)
if(cubeTexture == null)
closeTutorial();
// enable the texture we just loaded (NEW)
cubeTexture.enable(gl);
}
/**
* This method is called when we destroy our opengl window
*/
@Override
public void dispose(GLAutoDrawable drawable) {}
/**
* Here happens the actual opengl drawing
*/
@Override
public void display(GLAutoDrawable drawable) {
// get the GL2 context on which we can draw
final GL2 gl = drawable.getGL().getGL2();
// Clear The Screen And The Depth Buffer
gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
// Sets the background color of our window to black (RGB alpha)
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// reset the scene to its origin point
gl.glLoadIdentity();
// reset the scene to its origin point
gl.glLoadIdentity();
// Move Left 1.5 Units And Into The Screen 6.0
gl.glTranslatef(0.0f,0.0f,-6.0f);
// Rotate The Cube around X, Y and Z Axis (NEW)
gl.glRotatef(xrot,1.0f,0.0f,0.0f); // Rotate On The X Axis
gl.glRotatef(yrot,0.0f,1.0f,0.0f); // Rotate On The Y Axis
gl.glRotatef(zrot,0.0f,0.0f,1.0f); // Rotate On The Z Axis
// draw the cube (NEW)
drawTexturedCube(gl);
// adjust the rotation angle (NEW)
xrot+=0.3f; // X Axis Rotation
yrot+=0.2f; // Y Axis Rotation
zrot+=0.4f; // Z Axis Rotation
gl.glFlush();
}
/**
* This method is called when our window his dimension is changed
*/
@Override
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
final GL2 gl = drawable.getGL().getGL2();
final GLU glu = new GLU();
if (height <= 0) // avoid a divide by zero error!
height = 1;
gl.glViewport(0, 0, width, height);
// change matrixmode to projection for perspective
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glLoadIdentity();
final float h = (float)width / (float)height;
glu.gluPerspective(45.0f, h, 1.0, 20.0);
// restore the matrix mode to modelview
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glLoadIdentity();
}
});
// add a KeyListener so we can respond to user input
window.addKeyListener(new KeyAdapter() {
// We stop the tutorial if we press the escape key
@Override
public void keyPressed(KeyEvent ke){
if(ke.getKeyCode() == KeyEvent.VK_ESCAPE)
closeTutorial();
if(ke.getKeyCode() == KeyEvent.VK_F1){
fullscreen = !fullscreen;
window.setFullscreen(fullscreen);
}
}
}
);
// create a new FPS Animator
FPSAnimator animator = new FPSAnimator(window, 60);
animator.add(window);
animator.start();
}
/**
* Closes the tutorial and retuns to the selection menu
*/
private void closeTutorial(){
if(window != null){
window.setVisible(false);
window.destroy();
}
}
/**
* This method draws a textured cube on the screen (NEW)
* @param gl The gl context on which we draw
*/
private void drawTexturedCube(GL2 gl) {
// Use the texture on our cube
cubeTexture.bind(gl);
gl.glBegin(GL2.GL_QUADS);
// Front Face
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad
// Back Face
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Texture and Quad
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, -1.0f); // Bottom Left Of The Texture and Quad
// Top Face
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Texture and Quad
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom Right Of The Texture and Quad
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
// Bottom Face
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Top Right Of The Texture and Quad
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f( 1.0f, -1.0f, -1.0f); // Top Left Of The Texture and Quad
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
// Right face
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, -1.0f); // Bottom Right Of The Texture and Quad
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, -1.0f); // Top Right Of The Texture and Quad
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f( 1.0f, 1.0f, 1.0f); // Top Left Of The Texture and Quad
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f( 1.0f, -1.0f, 1.0f); // Bottom Left Of The Texture and Quad
// Left Face
gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Texture and Quad
gl.glTexCoord2f(1.0f, 0.0f); gl.glVertex3f(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Texture and Quad
gl.glTexCoord2f(1.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, 1.0f); // Top Right Of The Texture and Quad
gl.glTexCoord2f(0.0f, 1.0f); gl.glVertex3f(-1.0f, 1.0f, -1.0f); // Top Left Of The Texture and Quad
gl.glEnd();
}
/**
* Loads the texture for the cube (NEW)
* @return The texture
*/
private Texture loadTexture() {
Texture texture = null;
File imgFile = null;
try {
URL url = this.getClass().getClassLoader().getResource("nehe.bmp");
imgFile = new File(url.getFile());
texture = TextureIO.newTexture(imgFile, true);// bool - mipmap.
}
catch (IOException e) {
System.out.println("fail openning file... " + imgFile.getName());
System.out.println(e);
}
return texture;
}
public static void main(String argv[]){
Tutorial_06 tut = new Tutorial_06();
}
}
I think the problem is with this line:
URL url = this.getClass().getClassLoader().getResource("nehe.bmp");
I've tried ("\nehe.bmp"), I've tried "C:\nehe.bmp", I've tried all sorts of other options, I've even tried using paint to make my own. Nothing has worked. Please save me.
