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Title: texture creating problem
Post by: pn__ on October 28, 2004, 14:24:23

hi

im trying to load a texture like it is described in the nehe tutorial.

all i get is:
java.lang.UnsatisfiedLinkError: nglGenTextures
at org.lwjgl.opengl.GL11.nglGenTextures(Native Method)
at org.lwjgl.opengl.GL11.glGenTextures(Unknown Source)
...

everything else (untextured stuff) works really nice...
do i need another library or something ?

thank you

Title: texture creating problem
Post by: Chman on October 28, 2004, 15:25:50

Can you post the texture loading stuff to see what's wrong ?
:)

Chman

Title: texture creating problem
Post by: pn__ on October 28, 2004, 15:33:16

hi
here is the sourcecode...

Code Select



	public int loadTexture(String path) 
	{
	    
	    Image image = (new javax.swing.ImageIcon(path)).getImage();

        // Exctract The Image
        BufferedImage tex = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_3BYTE_BGR);
        Graphics2D g = (Graphics2D) tex.getGraphics();
        g.drawImage(image, null, null);
        g.dispose();

        // Flip Image
        AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
        tx.translate(0, -image.getHeight(null));
        AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
        tex = op.filter(tex, null);
 
        // Put Image In Memory
        ByteBuffer scratch = ByteBuffer.allocateDirect(4 * tex.getWidth() * tex.getHeight());

        byte data[] = (byte[]) tex.getRaster().getDataElements(0, 0, tex.getWidth(), tex.getHeight(), null);
        scratch.clear();
        scratch.put(data);
        scratch.rewind();

        // Create A IntBuffer For Image Address In Memory
        IntBuffer buf = ByteBuffer.allocateDirect(4).order(ByteOrder.nativeOrder()).asIntBuffer();
        //GL11.glGenTextures(buf); // Create Texture In OpenGL


        GL11.glGenTextures(buf); // HERE IT CRASHES


        GL11.glBindTexture(GL11.GL_TEXTURE_2D, buf.get(0));
        // Typical Texture Generation Using Data From The Image

        // Linear Filtering
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
        // Linear Filtering
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
        // Generate The Texture
        GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGB, tex.getWidth(), 
                          tex.getHeight(), 0, GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, scratch);

        return buf.get(0); // Return Image Address In Memory
	}

[/code]

Title: texture creating problem
Post by: Chman on October 28, 2004, 17:14:18

Hum that's strange, I don't see any problem in this code... Which version of LWJGL are you using ? What's your video card ?

Chman

PS: Just one thing, are you loading the texture before starting the rendering loop or during the loop ? Texture loading in OpenGL should be made in initilization code (so just before starting the rendering loop)...

Title: texture creating problem
Post by: CaptainJester on October 28, 2004, 19:07:33

Also make sure in your init code that you call GL11.glEnable(GL11.GL_TEXTURE_2D);

when you want to use the texture are you calling GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture);

Title: texture creating problem
Post by: pn__ on October 28, 2004, 19:28:35

hey

i just got it, i was trying to do this before initializing display and opengl, which is a bit stupid :))

anyway, thank you for helping

LWJGL Forum

Programming => Lightweight Java Gaming Library => Topic started by: pn__ on October 28, 2004, 14:24:23