[GLGraphics] pixel values outside the GLTexture border

limch0808

[GLGraphics] pixel values outside the GLTexture border

in Contributed Library Questions • 2 years ago

Hi, I'm having some trouble figuring out how to modify texture parameters.

I want to make my texture border's pixel values to be clamped to the edge (GL_CLAMP_TO_EDGE),
but I'm not that familiar with the native OpenGL, so I need some tips to solve the problem...

GLGraphics renderer = (GLGraphics)g;
renderer.beginGL();
GL gl = renderer.gl;
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_S, gl.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_T, gl.GL_CLAMP_TO_EDGE);
renderer.endGL();

??

GLGraphics have a class named 'GLTextureParameters', and there are these 'wrappingU', 'wrappingV' fields.
But I'm not sure what values have to be entered, or how to use this class.

Or, are there any other ways to solve this problem?

Replies(2)

andres

Re: [GLGraphics] pixel values outside the GLTexture border

2 years ago

Hello,

GLGraphics doesn't support the clamp to edge mode. The way to set it manually would be as follows:

import processing.opengl.*;
import codeanticode.glgraphics.*;
import javax.media.opengl.*;
GLTexture tex;
void setup() {
size(640, 480, GLConstants.GLGRAPHICS);
tex = new GLTexture(this, "milan_rubbish.jpg");
GL gl = ((GLGraphics)g).gl;
gl.glBindTexture(tex.getTextureTarget(), tex.getTextureID());
gl.glTexParameteri(tex.getTextureTarget(), GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(tex.getTextureTarget(), GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
}
void draw() {
image(tex, 0, 0, width, height);
}

limch0808

Re: Re: [GLGraphics] pixel values outside the GLTexture border

2 years ago

You are the BEST!!!! Thanks a lot!

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