Lesson6 - Texture Mapping :)

NeHe Productions Affiliates

Started by sh0rtaaay August 28, 2002 03:10 PM

8 comments, last by sh0rtaaay 21 years, 7 months ago

122

Author

August 28, 2002 03:10 PM

My problem is, when I try to compile i get an error in the following section of the code: "[Warning] In function `int LoadGLTextures()'': 78 implicit declaration of function `int free(...)'' [Build Error] [main.o] Error 1"

  
int LoadGLTextures()					
{
	int Status=FALSE;

	AUX_RGBImageRec *TextureImage[1];					
	memset(TextureImage,0,sizeof(void *)*1);           	
	
	if (TextureImage[0]=LoadBMP("Data\NeHe.bmp"))
	{
		Status=TRUE;					

		glGenTextures(1, &texture[0]);			

                glBindTexture(GL_TEXTURE_2D, texture[0]);
                glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
}
         if (TextureImage[0])					
	 {
		if (TextureImage[0]->data)			
		{
			free(TextureImage[0]->data);		
		}

		free(TextureImage[0]);					 }

	return Status;					
}

im using dev-cpp..

"the baby was like.. you know.. retarded"

vincoof

514

August 28, 2002 04:27 PM

insert that line at the beginning of your source code :

  #include <stdlib.h>

sh0rtaaay

122

Author

August 28, 2002 11:35 PM

THX dude, now it works

"the baby was like.. you know.. retarded"

sh0rtaaay

122

Author

August 29, 2002 09:33 AM

oh darn it..

now what do i do to fix:

[Linker error] undefined reference to `auxDIBImageLoadA@4''
[Linker error] undefined reference to `glGenTextures@8''
[Linker error] undefined reference to `glBindTexture@8''
[Linker error] undefined reference to `glTexImage2D@36''
[Linker error] undefined reference to `glTexParameteri@12''
[Linker error] undefined reference to `glTexParameteri@12''
[Linker error] undefined reference to `glViewport@16''
[Linker error] undefined reference to `glMatrixMode@4''
[Linker error] undefined reference to `glLoadIdentity@0''
[Linker error] undefined reference to `gluPerspective@32''
[Linker error] undefined reference to `glMatrixMode@4''
[Linker error] undefined reference to `glLoadIdentity@0''
[Linker error] undefined reference to `glEnable@4''
[Linker error] undefined reference to `glShadeModel@4''
[Linker error] undefined reference to `glClearColor@16''
[Linker error] undefined reference to `glClearDepth@8''
[Linker error] undefined reference to `glEnable@4''
[Linker error] undefined reference to `glDepthFunc@4''
[Linker error] undefined reference to `glHint@8''
[Linker error] undefined reference to `glClear@4''
[Linker error] undefined reference to `glLoadIdentity@0''
[Linker error] undefined reference to `glTranslatef@12''
[Linker error] undefined reference to `glRotatef@16''
[Linker error] undefined reference to `glRotatef@16''
[Linker error] undefined reference to `glRotatef@16''
[Linker error] undefined reference to `glBindTexture@8''
[Linker error] undefined reference to `glBegin@4''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glTexCoord2f@8''
[Linker error] undefined reference to `glVertex3f@12''
[Linker error] undefined reference to `glEnd@0''
[Linker error] undefined reference to `wglMakeCurrent@8''
[Linker error] undefined reference to `wglDeleteContext@4''
[Linker error] undefined reference to `wglCreateContext@4''
[Linker error] undefined reference to `wglMakeCurrent@8''

:|

"the baby was like.. you know.. retarded"

Anonymous

August 29, 2002 09:42 AM

You need to include the openGL .libs

sh0rtaaay

122

Author

August 29, 2002 09:54 AM

those would be

#include <gl\gl.h>
#include <gl\glu.h>
#include <gl\glaux.h>

and they're allready included

i've also got

-lopengl32 -lglu32 -lglaux

under "Linker options/Optional libs or object files"
in my project options.

Im almost certain that i've set the project up correctly, but if anyone want to contribute and help me learn opengl, i'd like a complete walkthrough of everything needed to set up an opengl program.
(im using dev-cpp therefore it has to be a walkthrough which fits dev-cpp)

[edited by - sh0rtaaay on August 29, 2002 12:35:34 PM]

"the baby was like.. you know.. retarded"

algumacoisaqualquer

170

August 30, 2002 11:13 AM

You need to have the Glaux.dll in the same directory of your project and Exe. There are some problems with Glaux no being suported anymore ar something like that. you can still use it on Dev-C++, but you will need to download the glaux DLL (1,32Mgs), and distribute it with your game. This is why many people prefer to write their own bitmap Loading function (see NeHe Lesson24, he loads a TGA file, but you can try to modify it to a BMP), but that''s something that will take some time.

I can e-mail the dll for you if you want to (or my bmp loader, but my bmp loader has poor comenting, leeks memory and doesen''t always work. It will load bmps however...).

Erunama

168

August 30, 2002 12:26 PM

quote:Original post by sh0rtaaay
Im almost certain that i''ve set the project up correctly, but if anyone want to contribute and help me learn opengl, i''d like a complete walkthrough of everything needed to set up an opengl program.
(im using dev-cpp therefore it has to be a walkthrough which fits dev-cpp)

sh0rtaaay

122

Author

August 31, 2002 03:45 AM

thx algumacoisaqualquer.. but actually.. those linker errors were because of a bug in Dev-cpp. It''s fixed now.
Tho you are right about the thing that i need glaux.dll

I don''t want your bitmap loader, but i would like some info(tutorial) on how to make one of these, NOT using glaux.

"the baby was like.. you know.. retarded"

algumacoisaqualquer

170

August 31, 2002 03:36 PM

Ok, here is how I did it:

1) Take a look at NeHe''s Lesson24, it loads a *tga file, learn how it works, it can look hard at first, but it''s not.

2) Get the bmp file format at http://www.wotsit.org, take a look. I sugest that you download Hex Workshop at http://www.bpsoft.com, this is a program that opens any file in it''s binary format, very useful to understand how the data storage works. It''s shareware, but you can use it for 30 days, that will be a lot more than you need.

3) Mix them up and cook for 1 hour. basicly, in the TGA load thing, he takes the image height, width, bites per pixel, and the start of the pixels array. For 24bits bitmaps, you are going to do the same, the only difirence will be the position of this informations, in the TGA you use height = buffer[4], and in BMP you use height = buffer[10], (not the actual posicions, but you get the idea). For paleted bitmaps, you will also have to deal with the palete, but it''s not that hard.

Lesson6 - Texture Mapping :)

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