Mapping several Textures on the same surface

[elect]

Hi,

I am rendering a cylinder and mapping two different textures to the top and to the bottom face.

Both the textures are loaded in the following way:

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check3dFloorFile = new File(check3dFloorPath);                 try {             check3dFloorTexture = TextureIO.newTexture(check3dFloorFile, true);         } catch (IOException | GLException ex) {             Logger.getLogger(Viewer.class.getName()).log(Level.SEVERE, null, ex);         }                 check3dFloorTexture.setTexParameteri(gl, GL2.GL_TEXTURE_MIN_FILTER,                                                     GL2.GL_LINEAR_MIPMAP_LINEAR);         check3dFloorTexture.setTexParameteri(gl, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_LINEAR);                         check3dFloorBackFile = new File(check3dFloorBackPath);                 try {             check3dFloorBackTexture = TextureIO.newTexture(check3dFloorBackFile, true);         } catch (IOException | GLException ex) {             Logger.getLogger(Viewer.class.getName()).log(Level.SEVERE, null, ex);         }                 check3dFloorBackTexture.setTexParameteri(gl, GL2.GL_TEXTURE_MIN_FILTER,                                                     GL2.GL_LINEAR_MIPMAP_LINEAR);         check3dFloorBackTexture.setTexParameteri(gl, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_LINEAR);

The problem arises when I try to render to a texture (a blank one, that has nothing to do with this first two ones):

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gl.glGenTextures(1, textureID, 0);         gl.glBindTexture(GL2.GL_TEXTURE_2D, textureID[0]);                 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.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_NEAREST);         gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_NEAREST);                 // null means reserve texture memory, but texels are undefined        gl.glTexImage2D(GL2.GL_TEXTURE_2D, 0, GL2.GL_RGB, floorWidth, floorHeight,                                                     0, GL2.GL_RGB, GL2.GL_FLOAT, null);                 gl.glGenFramebuffers(1, frameBufferID, 0);         gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, frameBufferID[0]);                 //Attach 2D texture to this FBO        gl.glFramebufferTexture2D(GL2.GL_FRAMEBUFFER, GL2.GL_COLOR_ATTACHMENT0,                                         GL2.GL_TEXTURE_2D, textureID[0], 0);                 // depth buffer        //int[] depthRenderBufferID = new int[1];        gl.glGenRenderbuffers(1, depthRenderBufferID, 0);         gl.glBindRenderbuffer(GL2.GL_RENDERBUFFER, depthRenderBufferID[0]);         gl.glRenderbufferStorage(GL2.GL_RENDERBUFFER, GL2.GL_DEPTH_COMPONENT,                                                 floorWidth, floorHeight);         gl.glFramebufferRenderbuffer(GL2.GL_FRAMEBUFFER, GL2.GL_DEPTH_ATTACHMENT,                                             GL2.GL_RENDERBUFFER, depthRenderBufferID[0]);                 if(gl.glCheckFramebufferStatus(GL2.GL_FRAMEBUFFER) == GL2.GL_FRAMEBUFFER_COMPLETE)             System.out.println("[Viewer] GL_FRAMEBUFFER_COMPLETE!!");         else             System.out.println("..cazzo ^^");

As soon as this code is executed, the texture mapped on the top of the cylinder disappears and all the top turns to black..

Why?

Ps: my task is to map this third rendered texture on the top of the cylinder, over the already existing one..

[gouessej]

Why not simply using multitexturing?

You should rather post your questions on the official JogAmp forum too if you want more replies and I cannot come here by using a machine with a restricted web access, you see what I mean 

[theagentd]

Just use multi-texturing. IMO it's easier to do it in a shader than by messing around with texture parameters.

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[elect]

Just use multi-texturing. IMO it's easier to do it in a shader than by messing around with texture parameters.

I guess shader means OpenGL 3 or above... Im using 2.0

[kappa]

Just use multi-texturing. IMO it's easier to do it in a shader than by messing around with texture parameters.

I guess shader means OpenGL 3 or above... Im using 2.0

You can use shaders in OpenGL 2.0 too.

[elect]

Just use multi-texturing. IMO it's easier to do it in a shader than by messing around with texture parameters.

I guess shader means OpenGL 3 or above... Im using 2.0

You can use shaders in OpenGL 2.0 too.

Do you have a link to any good guide/howto/tutorial?

[theagentd]

Shaders were promoted to core in OpenGL 2.0... >_>

[elect]

Shaders were promoted to core in OpenGL 2.0... >_>

Hey comon, im a nub

Otherwise I would not be here asking for your help 

[theagentd]

Shaders were promoted to core in OpenGL 2.0... >_>

Hey comon, im a nub

Otherwise I would not be here asking for your help 

Well, sorry... 

OpenGL 2 = DirectX 9 hardware (2002)
OpenGL 3 = DirectX 10 hardware (2007)
OpenGL 4 = DirectX 11 hardware (2009)

On top of this we have extensions, so some cards may for example not support OpenGL 2 fully but still support shaders, and some OGL 2 cards may support Frame Buffer Objects even though it was only promoted to core in OGL 3.

[elect]

Just use multi-texturing. IMO it's easier to do it in a shader than by messing around with texture parameters.

I guess shader means OpenGL 3 or above... Im using 2.0

You can use shaders in OpenGL 2.0 too.

Btw, it is possible to do it without shaders?

Games published by our own members! Check 'em out!

[theagentd]

Yes, but it's messy as hell. You'll have to Google it, since I took a look at it once, threw up and went over to using shaders.