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  Cube Texturing, HELP pls !  (Read 852 times)
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Offline beaucoralk

Senior Newbie
« Posted 2011-05-24 12:22:09 »
I feel there is a problem with the Z-BUFFER!
I can not make the faces of the cubes are properly textured visible or not.
Here is what I obtain:

and here is my code:
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@Override
    public void init(GLAutoDrawable gLDrawable) 
    {
       System.out.println("init() called");
        GL2 gl = gLDrawable.getGL().getGL2();
        gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        gl.glEnable(GL2.GL_DEPTH_TEST);                                          // Enables Depth Testing
        gl.glDepthFunc(GL2.GL_LESS);
    }

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gl.glColor3f(1.0f, 1.0f, 1.0f);
        gl.glEnable(GL2.GL_BLEND);
        gl.glBlendFunc(GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA);
        
        texPack.getTexture(numtex).getTop().enable();
        texPack.getTexture(numtex).getTop().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glBegin(GL2.GL_QUADS);
        gl.glNormal3f(0.0f, 1.0f, 0.0f);
        gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z + CUBESIZE);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x, y + CUBESIZE, z + CUBESIZE);
        gl.glEnd();
        texPack.getTexture(numtex).getTop().disable();
        
   texPack.getTexture(numtex).getBottom().enable();
        texPack.getTexture(numtex).getBottom().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glNormal3f(0.0f, -1.0f, 0.0f);
   gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y, z);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x, y, z);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x, y, z + CUBESIZE);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y, z + CUBESIZE);
        gl.glEnd();
        texPack.getTexture(numtex).getBottom().disable();
        
   texPack.getTexture(numtex).getRight().enable();
        texPack.getTexture(numtex).getRight().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glBegin(GL2.GL_QUADS);
        gl.glNormal3f(1.0f, 0.0f, 0.0f);
   gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z + CUBESIZE);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y, z);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y, z + CUBESIZE);
        gl.glEnd();
        texPack.getTexture(numtex).getRight().disable();
   
   texPack.getTexture(numtex).getLeft().enable();
        texPack.getTexture(numtex).getLeft().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glBegin(GL2.GL_QUADS);
        gl.glNormal3f(-1.0f, 0.0f, 0.0f);
   gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x, y + CUBESIZE, z + CUBESIZE);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x, y, z + CUBESIZE);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x, y, z);
        gl.glEnd();
        texPack.getTexture(numtex).getLeft().disable();
   
   texPack.getTexture(numtex).getFront().enable();
        texPack.getTexture(numtex).getFront().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glBegin(GL2.GL_QUADS);
        gl.glNormal3f(0.0f, 0.0f, 1.0f);
   gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x, y + CUBESIZE, z + CUBESIZE);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z + CUBESIZE);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y, z + CUBESIZE);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x, y, z + CUBESIZE);
        gl.glEnd();
        texPack.getTexture(numtex).getFront().disable();
   
   texPack.getTexture(numtex).getBack().enable();
        texPack.getTexture(numtex).getBack().bind();
        gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT);
   gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT);
   gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
        gl.glBegin(GL2.GL_QUADS);
        gl.glNormal3f(0.0f, 0.0f, -1.0f);
   gl.glTexCoord2d(0.0f, 0.0f); gl.glVertex3f(x + CUBESIZE, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 0.0f); gl.glVertex3f(x, y + CUBESIZE, z);
   gl.glTexCoord2d(1.0f, 1.0f); gl.glVertex3f(x, y, z);
   gl.glTexCoord2d(0.0f, 1.0f); gl.glVertex3f(x + CUBESIZE, y, z);
        gl.glEnd();
        texPack.getTexture(numtex).getBack().disable();
        
        gl.glDisable(GL2.GL_BLEND);

texPack.getTexture(numtex).getTop() // Renvoi l'objet Texture ou est charger le fichier top.png
texPack.getTexture(numtex).getBottom() // Renvoi l'objet Texture ou est charger le fichier bottom.png
texPack.getTexture(numtex).getRight() // Renvoi l'objet Texture ou est charger le fichier right.png
texPack.getTexture(numtex).getLeft() // Renvoi l'objet Texture ou est charger le fichier left.png
texPack.getTexture(numtex).getFront() // Renvoi l'objet Texture ou est charger le fichier front.png
texPack.getTexture(numtex).getBack() // Renvoi l'objet Texture ou est charger le fichier back.png

Please HELP ME !!
Offline Orangy Tang

JGO Kernel


Medals: 48
Projects: 11


Monkey for a head
« Reply #1 - Posted 2011-05-24 15:13:36 »
Did you remember to request a depth buffer when creating your display?
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Offline Riven
« League of Dukes »

JGO Overlord


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Hand over your head.
« Reply #2 - Posted 2011-05-24 16:51:49 »
Did you set your near-clipping-plane to (almost) zero? (in the projection matrix)


Other points:

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gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

You typically want (0.0f, 0.0f, 0.0f, 1.0f) // alpha: 1.0

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        gl.glDepthFunc(GL2.GL_LESS);

You typically want (GL_LEQUAL)
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Offline beaucoralk

Senior Newbie
« Reply #3 - Posted 2011-05-24 17:03:01 »
Quote
Did you set your near-clipping-plane to (almost) zero? (in the projection matrix)
I must admit I'm confused ... How can I do to do this?
Quote
Did you remember to request a depth buffer when creating your display?
Same question ... lol
Offline gouessej

JGO Ninja


Medals: 33
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TUER
« Reply #4 - Posted 2011-05-27 14:26:13 »
Hi!

Quote from: beaucoralk on 2011-05-24 12:22:09
Please HELP ME !!
Keep cool, this forum has already an example of excited French people Wink

I think that the order of the vertices is wrong, the texture at the bottom of each cube is not displayed. I'm accustomed with displaying orthogonal volumes, I had done this kind of mistake in the past.
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