Per-Texture Unit Parameters

OpenGL Development
#1

Is there any way I can do multi-texturing in a shader, but still have the parameters effect per-texture unit?

Here’s my code so far, if this isn’t possible, then I don’t mind hard-coding a linear interpolation filter in the shader code itself by uniforms.


setParametei(this.getTarget(), GL11.GL_TEXTURE_MAG_FILTER, filter);
setParametei(this.getTarget(), GL11.GL_TEXTURE_MIN_FILTER, filter);

setParametei(this.getTarget(), GL11.GL_TEXTURE_WRAP_S, clamp);
setParametei(this.getTarget(), GL11.GL_TEXTURE_WRAP_T, clamp);

GL13.glActiveTexture(GL13.GL_TEXTURE0 + unit);
GL11.glBindTexture(target, textureID);
#2

ja. u could use sampler-objects for that.

https://www.opengl.org/wiki/Sampler_Object

  • bind same texture to multiple pipes, say 1 2 3.

  • bind a sampler (for instance linear sampling) object to pipe 1

  • bind another sampler (nearest sampling) to pipe 2

  • bind another sampler (st-repeat or something) to pipe 3

  • assign uniforms :

shader.uniform("tex_linear", 1);
shader.uniform("tex_nearest", 2);
shader.uniform("tex_repeat", 3);
  • in the shader use :
uniform sampler2D tex_linear;
uniform sampler2D tex_nearest;
uniform sampler2D tex_repeat;

tho’ maybe i just missed what you’re looking for.

#3

I meant multiple textures being bound at once, with different texture units, with different parameters. So far it isn’t working. Multi texturing is, but not setting the parameters.

#4

if you mean parameter which are available through sampler-objects, it should work.

#5

Yeah, but it’s not working so far, it seems that the parameters of the texture I’m binding only effect the texture bound before.