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About Medic8712

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  1. Are NeHe's tutorials still any good?

    Based on the tutorials and the OpenGL books I have everything on NeHe seems pretty standard to the books (not saying the books arn't outdated either). I'm honestly not sure if they are up to industry standard but there still really good for learning basics in OpenGL. I say this because in my experience in 2d programming and a few different Graphic API's usually the newest updates usually don't change much as far as what code you use but more of what the code does internally.
  2. Weird Access Violation Error

    Ok, I have ended up answering my own question. Its pretty simple really and i kick myself for not thinking about it yesterday. The two different bmp file were saved with 2 different bit depths. Apparently my code won't handle but the one bit depth, so I converted the one that didn't work to same as the one that did and now both are working. If anyone else has this problem try checking that.
  3. Weird Access Violation Error

    I've been toying with opengl for a little while now and have made my way down into NeHes 6th and 7th tutorials. I have no problem at all understanding the tutorials (even though I have to gut the windows code from them cause I'm using SDL). I successfully got tutorial 6 working in my own coding method with SDL. I moved onto tutorial 7 and decided to do a recode on my load texture function to include all 3 filter methods shown. I of course wanted to test my new function so I skipped the light portion and went ahead and compiled and ran the code. This is where the error pops up. The program crashes at startup. I run in debug and it gives me an Access violation that it says is no where in my code (kinda hard to explain that one but when i try to be shown where in the code the violation takes place it tells me no source code applicable). Now heres the weird part. If i compile and run the code using the bmp file from tutorial 6 it runs perfectly. When I switch out the bmp with the one from 7 it crashes on startup and spits out the Access Violation. I've tried completely closing the IDE and restarting it. I've tried commenting out lines until i found the one that crashes it. I've tried pretty much everything i can think of. Its just wierd cause it works with the one but not the other. Here's my code. [code] //Loading Texture to GLuint texture[] is declared as GLUint texture[3]; texture[0] =LoadTexture("Crate.bmp", 1); //Funtion to load img and convert to texture int LoadTexture(const char *file, int TexFilter) { SDL_Surface *tex = IMG_Load(file); GLuint texture; switch(TexFilter) { case 1: if(tex) { glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexImage2D(GL_TEXTURE_2D, 0, 3, tex->w, tex->h, //IF commented out the program will run but will be just a black screen with no crashing 0, GL_BGR, GL_UNSIGNED_BYTE, tex->pixels); SDL_FreeSurface(tex); return texture; } break; case 2: if(tex) { glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexImage2D(GL_TEXTURE_2D, 0, 3, tex->w, tex->h, 0, GL_BGR, GL_UNSIGNED_BYTE, tex->pixels); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); SDL_FreeSurface(tex); return texture; } break; case 3: if(tex) { glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); gluBuild2DMipmaps(GL_TEXTURE_2D, 3, tex->w, tex->h, GL_BGR, GL_UNSIGNED_BYTE, tex->pixels); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); SDL_FreeSurface(tex); return texture; } break; default: SDL_FreeSurface(tex); return NULL; } SDL_FreeSurface(tex); return NULL; } [/code] And heres my specs (shouldn't matter for something this simple for programming though I would think. Using VS Studios 2010 Ultimate Win 7 Ultimate 32 bit 4 gigs ram Nvidia 9800 Geforce graphics card Core 2 duo Intel processor SDL with OpenGL both updated to latest releases Come to think of it I think it may be because I didn't free the texture? Its late here where i'm at and I'm done fooling with it tonight but if that might be it please say so and i'll test it tomorrow after a reboot.
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