Problems with Lesson 6
Author
I was trying to compile Lesson 6, (loading textures) in my compiler, DevC++ but got some errors. Can someone look at my source code and tell me how to fix it, or fix it for me.
You Can get it form here, http://webvision.xdesignz.com/OpenGLSource.zip
thanks,
There is a reason that people format code nicely with consistent indenting. When I compile your code I get the following errors:
So I jump to line 58 and find:
If I rewrite that with proper indenting:
The error moves to line 62 and the problem is now clear. You have horibly mixed up the functions ReSizeGLScene and LoadGLTextures. Separate them and the errors are reduced to:
Sort out the indentation again and you'll find the function looks like this:
So get rid of the additional closing brace and everything should compile fine.
Error E2108 main.cpp 58: Improper use of typedef 'GLvoid' in function LoadGLTextures()Error E2379 main.cpp 58: Statement missing ; in function LoadGLTextures()Error E2451 main.cpp 73: Undefined symbol 'width' in function LoadGLTextures()Error E2451 main.cpp 73: Undefined symbol 'height' in function LoadGLTextures()Error E2190 main.cpp 91: Unexpected }Error E2268 main.cpp 330: Call to undefined function 'ReSizeGLScene' in function CreateGLWindow(char *,int,int,int,bool)Error E2268 main.cpp 398: Call to undefined function 'ReSizeGLScene' in function __stdcall WndProc(HWND__ *,unsigned int,unsigned int,long)So I jump to line 58 and find:
35 int LoadGLTextures()36 {37 int Status=FALSE;38 AUX_RGBImageRec *TextureImage[1]; // Create Storage Space For The Texture39 memset(TextureImage,0,sizeof(void *)*1); //Clears TextureImage40 // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit41 if (TextureImage[0]=LoadBMP("Data/NeHe.bmp"))42 {Status=TRUE; // Set The Status To TRUE43 glGenTextures(1, &texture[0]); // Create The Texture44 // Typical Texture Generation Using Data From The Bitmap45 glBindTexture(GL_TEXTURE_2D, texture[0]);46 // Generate The Texture47 glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);48 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); // Linear Filtering49 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // Linear Filtering50 }51 52 if (TextureImage[0])53 {54 if (TextureImage[0]->data){ free(TextureImage[0]->data); }55 free(TextureImage[0]);56 }57 58 GLvoid ReSizeGLScene(GLsizei width, GLsizei height)59 {60 if (height==0)61 {62 height=1;63 }64 return Status; // Return The Status65 }666768 glViewport(0, 0, width, height); // Reset The Current Viewport69 glMatrixMode(GL_PROJECTION); // Select The Projection Matrix70 glLoadIdentity(); // Reset The Projection Matrix7172 // Calculate The Aspect Ratio Of The Window73 gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);7475 glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix76 glLoadIdentity(); // Reset The Modelview Matrix77 }If I rewrite that with proper indenting:
35 int LoadGLTextures()36 {37 int Status=FALSE;38 AUX_RGBImageRec *TextureImage[1]; // Create Storage Space For The Texture39 memset(TextureImage,0,sizeof(void *)*1); //Clears TextureImage40 // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit41 if (TextureImage[0]=LoadBMP("Data/NeHe.bmp"))42 {43 Status=TRUE; // Set The Status To TRUE44 glGenTextures(1, &texture[0]); // Create The Texture45 // Typical Texture Generation Using Data From The Bitmap46 glBindTexture(GL_TEXTURE_2D, texture[0]);47 // Generate The Texture48 glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);49 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); // Linear Filtering50 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // Linear Filtering51 }52 53 if (TextureImage[0])54 {55 if (TextureImage[0]->data)56 {57 free(TextureImage[0]->data);58 }59 free(TextureImage[0]);60 }61 62 GLvoid ReSizeGLScene(GLsizei width, GLsizei height)63 {64 if (height==0)65 {66 height=1;67 }68 return Status; // Return The Status69 }70 71 72 glViewport(0, 0, width, height); // Reset The Current Viewport73 glMatrixMode(GL_PROJECTION); // Select The Projection Matrix74 glLoadIdentity(); // Reset The Projection Matrix75 76 // Calculate The Aspect Ratio Of The Window77 gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);78 79 glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix80 glLoadIdentity(); // Reset The Modelview Matrix81 }The error moves to line 62 and the problem is now clear. You have horibly mixed up the functions ReSizeGLScene and LoadGLTextures. Separate them and the errors are reduced to:
Error E2190 main.cpp 95: Unexpected }Sort out the indentation again and you'll find the function looks like this:
int InitGL(GLvoid) // All Setup For OpenGL Goes Here{ // some code}}So get rid of the additional closing brace and everything should compile fine.
Author
I got the code to compile but the compiler won't create the exe file. I included the following lib files , -lopengl32 -lglu32 -lglut32 but it still don't work. What am I doing wrong?
Author
This is what says Linker:
undefined reference to `auxDIBImageLoadA@4'
undefined reference to `ChoosePixelFormat@8'
undefined reference to `SetPixelFormat@12'
undefined reference to `SwapBuffers@4'
On your first post you said you were able to fix the probem. Can you mail me to source. My screenname is viperblaze01@yahoo.com
undefined reference to `auxDIBImageLoadA@4'
undefined reference to `ChoosePixelFormat@8'
undefined reference to `SetPixelFormat@12'
undefined reference to `SwapBuffers@4'
On your first post you said you were able to fix the probem. Can you mail me to source. My screenname is viperblaze01@yahoo.com
For the first of those see the post that lc_overlord linked to. For the other three try adding -lgdi32 to the linker options.
Enigma
Enigma
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