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Index › Programming Questions & Help › OpenGL and 3D Libraries › Please help my WaterCube....
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Please help my WaterCube.... (Read 855 times)
triscuit
Please help my WaterCube....
May 3rd, 2008, 3:28am  
I'm trying to do something way over my head.

I'm working on getting a water like texture on an opengl cube.

I pasted a few sketches together and got really lost.

I don't know how to get the water ripples into the opengl code.

I tried:

img.pixels[i+j*width]=img.pixels[int((i+Xoffset)+(j+Yoffset)*img.width)] ;

Obviously this is not the correct way to go about passing the array into opengl.

Here is the full code I'm working on:

http://www.tristanhansen.com/WaterCube.pde

texture if you need one: http://www.tristanhansen.com/foo.png

I always get an array index outofbounds error.

Please please help. I have a draft of this project due Monday. Final project with music due Thursday.
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« Last Edit: May 3rd, 2008, 6:43am by triscuit »  
 
triscuit
Re: Please help my WaterCube....
Reply #1 - May 5th, 2008, 5:33am  
I figured out what the array error was. My image was too small and the buffer was too small.

At least it will compile now.


I had a dream about this cube so if anyone has a moment it really would be a dream come true. I just have no idea how to pass the vector information into the texture.

http://www.tristanhansen.com/WaterCube.pde

texture at the right size: http://www.tristanhansen.com/foo.png

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triscuit
Re: Please help my WaterCube....
Reply #2 - May 7th, 2008, 8:12am  
My sever was down for a while. It's now back, up if anyone has a minute. At the moment I've almost lost hope of achieving this.

I don't understand why I can't just change the image before it goes into the buffer.

I think the pixels can be altered with glReadPixels() but I really have no idea how to write the buffer that I need.

glTexSubImage2d (write pixels to a texture)
glGetTexImage (get pixels from a texture)
glGetTexLevelParameterfv (used to get pixel dimensions for figuring out what size of an array needed for use with glGetTexImage)  

These calls might also help. I'm not sure. I feel so alone. Sad

Please help!
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« Last Edit: May 7th, 2008, 9:18am by triscuit »  
 
sgsrules
Re: Please help my WaterCube....
Reply #3 - May 8th, 2008, 7:47am  
use this instead it will make your life easier:

import com.sun.opengl.util.texture.*;

Texture foo;

void setup(){

try{
   foo=TextureIO.newTexture(new                       File(dataPath("foo.png")),true);
   }
catch(Exception e) {
   println(e);
   }
}

void draw {
foo.bind();
foo.enable();
 // draw stuff that uses texture
}

here's a link to official documentation:
http://jsourcery.com/api/java.net/jogl/1.1.0/com/sun/opengl/util/texture/package-summary.html

and another one that discusses texturing in opengl in processing:
http://processing.org/discourse/yabb_beta/YaBB.cgi?board=OpenGL;action=display;num=1199399046
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Stephen Shepard (sgsrules)
 
triscuit
Re: Please help my WaterCube....
Reply #4 - May 8th, 2008, 8:23am  
That gets me so close. Thanks! Now how do I read the pixel array into the new way the texture is stored?

I'm going to try to figure this out myself but I'm running out of time.
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triscuit
Re: Please help my WaterCube....
Reply #5 - May 8th, 2008, 9:17am  
I think what I need is:


updateImage(TextureData data)

Not sure how to use it though.
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