Comments on: 7. Texturing in GLSL

By: BabyStuey

BabyStuey — Mon, 10 Oct 2011 08:01:43 +0000

There’s no link to a texture file in the download list for this tutorial. I found one here though: http://www.swiftless.com/tutorials/opengl/cplusplus/texture.zip

By: Paul

Paul — Thu, 22 Sep 2011 16:56:37 +0000

Hey Swift!

I was wondering how you make the “raw” files? Like the texture.raw. I can’t find any program to convert any file into raw. It may sound like a stupid question but please I am new to this and I need your help : )

By: maxnb

maxnb — Thu, 09 Jun 2011 13:18:51 +0000

not sure if you notice this but your theme is cutting the text, take a look here:

http://i.imgur.com/fDh8z.png

look at: didn’t rename the method, naughty me

well “rename the method” gets cut/hidden so its not really possible to follow the text, please correct this. If you need help with that, I am wordpress theme developer and can help you probably with css/html, in that case drop me an email and I’ll be glad to help

By: Paras

Paras — Tue, 24 May 2011 13:51:13 +0000

Hi Swiftless,

I have a following question,

file = fopen( filename, “rb” );
if ( file == NULL ) return 0;
data = (unsigned char *)malloc( width * height * 3 );
fread( data, width * height * 3, 1, file );
fclose( file );

glGenTextures( 1, &texture ); //generate the texture with the loaded
data
glBindTexture( GL_TEXTURE_2D, texture ); //bind the texture to it’s
array
glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE,
GL_MODULATE ); /

when you use the function, glGenTextures(),

How does the openGL understand to read the texture from the pointer “data”? I mean where have you passed ‘data ‘ to openGL.

By: hudeleli

hudeleli — Thu, 14 Apr 2011 09:28:11 +0000

Thank you for your effort! Keep up with your great tutorials!

By: Swiftless

Swiftless — Wed, 18 Aug 2010 00:24:14 +0000

Hey Fonix,

That’s a typo, just rename either of the variables to match up with the other.

Cheers,
Swiftless

By: Fonix

Fonix — Tue, 17 Aug 2010 15:51:21 +0000

…and takes the paramters for the shader id, and the name of the variable inside the shader for our texture.
int texture_location = glGetUniformLocation(shader.id(), “texture_color”);

and

uniform sampler2D color_texture;

dont seem to line up, is this intentional?

By: Swiftless

Swiftless — Tue, 29 Jun 2010 01:17:13 +0000

Hey Bloodust,

I’m surprised you got all the way to tutorial 7 before that

I’ve mentioned that in the comments for the previous tutorials. The reason I don’t have it, is because I made these tutorials on OSX and on OSX that call isn’t needed.

Cheers,
Swiftless

By: Bloodust

Bloodust — Sat, 26 Jun 2010 18:31:47 +0000

Great but missing glew initialization and without it my shader couldnt be created because
“Unhandled exception at 0×00000000″

add this to main before init()

if(glewInit() != GLEW_OK)
return 0;
or just
glewInit();

By: Osk

Osk — Sun, 11 Apr 2010 01:09:32 +0000

@Swiftless:
actually my game using shader from yours tuts looks like this:
http://www.gamedev.pl/projects.php?x=view&id=1198