Problem with mipmaping

please tell us what kind of code you are using for example to mipmap i use this:

glGenTextures(1,§or1.texture[0]);

glBindTexture(GL_TEXTURE_2D, sector1.texture[0]);

glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);

gluBuild2DMipmaps(GL_TEXTURE_2D,3,TextureImage[0]->sizeX, TextureImage[0]->sizeY,GL_RGB,GL_UNSIGNED_BYTE,TextureImage[0]->data);

tho that now it does not work anymore, it looks great on my pc..? and it doesn't bug my fps down...

the only "bad" thing is that it requires more memory(i think)

Greetz

[edited by - Fluid FX on July 31, 2002 11:05:54 AM]

something like this:


glGenTextures(1,&texture);

glBindTexture(GL_TEXTURE_2D, texture);



glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
gluBuild2DMipmaps(GL_TEXTURE_2D,4,bmpI->sizeX,bmpI->sizeY,GL_RGBA,GL_UNSIGNED_BYTE,bmpI->data);


but this is not a problem with TexParameteri (i tryed various combinations of filters)

P.S. :
Mipmaping needs more memory:
x=texture size
100%x - level 0 mipmap
+50% * 50% x - level 1 mipmap (4 times smaler)
+25% * 50% * 50% x - level 2 mipmap (16 times smaler than orginal)
+25% * 25% * 50% * 50% x - level 3 mipmap
=
circa 133% x, that makes about 1/3 additional memory

Fluid FX
/*wrote:

tho that now it does not work anymore, it looks great on my pc..? and it doesn''t bug my fps down...

the only "bad" thing is that it requires more memory(i think)

*/

;-)

fpp - first person perspective,
sorry by mistake, not fps

Enable Anisotropic texture filtering, that helps the "blurryness" you see with oblique surfaces.

Death of one is a tragedy, death of a million is just a statistic.

I just read your original post again, and if you are seeing the actual boundries of your mip levels, use the LINEAR_MIPMAP_LINEAR texture minification filter. ( This combined with anisotropic texture filtering looks great ).

Death of one is a tragedy, death of a million is just a statistic.

Anisotropic?
What is it and how can enable it?

Anisotropic texture filtering helps reduce the blurryness that you see on oblique ( surfaces that are at a small angle to the view ) surfaces. Goto the nVidia developers site, they have an example on anisotropic texture filtering ( as well as screenshots of standard isotropic and anisotropic texture filtering next to each other, so you can see the difference ). It explains the term aswell.

Look up the GL_EXT_texture_filter_anisotropic extension. It's extreamly easy to use.

Death of one is a tragedy, death of a million is just a statistic.

[edited by - python_regious on August 9, 2002 9:24:34 AM]

Thx!!!!

This works.
Using GL_LINEAR,GL_LINEAR_MIPMAP_LINEAR does great!