I 'm not able to aply the texture to my 3D object

hellsinn0 · 2004-05-20T16:21:36

hello, ok, I''ll put you into the situation. I have a window where I render the images captured from a web cam, and at the same time where I overlay a 3D object, which I can successfully load from a .3ds file; this is I''m mixing the camera images and the object==>I look for a reference in the captured image and I obtain the matrix for positioning the object (like ARToolkit does...if somebody knows about it) The problem is that I''m also loading the texture (a .bmp file) for that object but when drawing the object, I just can see a plane color object, of course with shades and light effects, but ..no texture. I''ve been surfing on the web and I could find some examples for mapping textures using OpenGl and actually I could get an example to work...soooo, this is making me think that there must be some option when drawing the video frame or even when creating the window that disable the texture for the object, or probably I don''t draw the object in the proper order.....did anyone try it before?? I don''t know too much about OpenGl so.... please help!!!! I can post some of the code if somebody needs to take a look for some mistake...

Graphics and GPU Programming Programming

Started by hellsinn0 May 19, 2004 04:16 PM

18 comments, last by hellsinn0 19 years, 11 months ago

MaulingMonkey

1,729

May 20, 2004 03:34 AM

I believe you need to enable GL_TEXTURE as well as GL_TEXTURE_2D?

hellsinn0

122

Author

May 20, 2004 03:45 AM

quote:Original post by Raduprv
Yes, ID==0 means baaaad
Like I said, make your own texture loading function (check the NeHe tutorials).

could you tell me exactly where to find it, an easy way I mean. It just mean to me a bounch of code lines and I don''t know exactly what I need to make my own loader.
By the way, why am I getting ID=0? if I''m loading the texture in the same way than in the example??

Raduprv

997

May 20, 2004 03:46 AM

quote:Original post by MaulingMonkey
I believe you need to enable GL_TEXTURE as well as GL_TEXTURE_2D?

No, you don''t have to.
I don''t even think GL_TEXTURE exists.

Eternal Lands (free, Open Source MMORPG)

hellsinn0

122

Author

May 20, 2004 03:54 AM

heyyyyyyyyyyyyyy , I got a diferent number!!! yeahhh

ok, my fisrt error was==> I was loading the texture before CREATE THE WINDOW!!!! uppss...didn''t think it was important!!! as you guys can see I''m totally bad in this...ok now I''m getting after loading the texture ID=5, let''s see if it works now!!! I''ll let you know it!! hehehehe :D

MaulingMonkey

1,729

May 20, 2004 04:04 AM

quote:Original post by Raduprv
I don''t even think GL_TEXTURE exists.

It''s defined as 0x1702... at least in my version of gl.h.

I could''ve sworn that fixed the problem I was having once, but then again, it''s quite possible I modified something else at the same time.

hellsinn0

122

Author

May 20, 2004 05:37 AM

it''s not working!!! why????
I don''t understand anything.....I''m getting an ID=5, but when binding the texture I just can see a totally plane white circle shape. If don''t bind the texture at least a can see the 3D sphere!!! I''m desperated!!

urayami

122

May 20, 2004 02:11 PM

One thing I noticed is that when you first load your texture, you're using mipmaps to build your texture:

gluBuild2DMipmaps(GL_TEXTURE_2D,3,Image->sizeX,
Image->sizeY,GL_RGB, GL_UNSIGNED_BYTE,Image->data);

However, you're specifying GL_LINEAR for both *MIN_FILTER and *MAG_FILTER. I'm not sure if this would cause the problem, but try using this instead of gluBuild2DMipmaps:

glTexImage2D(GL_TEXTURE_2D, 0, 3, Image->sizeX,
Image->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, Image->data);

~Urayami

[edited by - urayami on May 20, 2004 3:12:04 PM]

~Urayami

_the_phantom_

11,263

May 20, 2004 02:21 PM

quote:Original post by hellsinn0
it''s not working!!! why????
I don''t understand anything.....I''m getting an ID=5, but when binding the texture I just can see a totally plane white circle shape. If don''t bind the texture at least a can see the 3D sphere!!! I''m desperated!!

Is your texture now a power of 2 in size? thats generally what you get when the texture isnt a power of 2 in size.

hellsinn0

122

Author

May 20, 2004 03:05 PM

GUYS!!!!!!! I could make it!!! guys!!!!! and don't know why but this thing suddenly worked !!!!

now, I'm able to see the texture in the simple sphere...so my challenge will be mapping different textures in a virtual laboratory I have made using 3ds max. wish me luck!!! otherwise I'll be around here bothering people, you guys. Thanks a lot to all you guys!!!

sincerely

Begoña.- the happiest one, right now!! hehe

yeeeep!!

by the way....I can also render bmp files that are not power of 2!!! isn't it weird???

[edited by - hellsinn0 on May 20, 2004 4:06:53 PM]

the last thing...is it normal to loose the shading efects?? now when I'm able to see the texture, the sphere looks kinda artificial, i don't have shades any more