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Main Page Namespace List Class Hierarchy Compound List File List Compound Members File Members #include "shared.h"#include "polygon.h"#include "texture.h"#include "camera.h"#include "locmath.h"Go to the source code of this file.
Functions | |
| bool | LoadTGA (TEXTURE *texture, char *filename) |
| void | SetGLProperties () |
| void | SetGLView (int Width, int Height) |
| void | SetGLMaterial () |
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Definition at line 3 of file general.cpp. References TEXTURE::Bpp, TEXTURE::Height, TEXTURE::ImageData, texture, and TEXTURE::Width.
00004 {
00005 GLubyte TGAheader[12]={0,0,2,0,0,0,0,0,0,0,0,0}; // Uncompressed TGA Header
00006 GLubyte TGAcompare[12]; // Used To Compare TGA Header
00007 GLubyte header[6]; // First 6 Useful Bytes From The Header
00008 GLuint bytesPerPixel; // Holds Number Of Bytes Per Pixel Used In The TGA File
00009 GLuint imageSize; // Used To Store The Image Size When Setting Aside Ram
00010 GLuint temp; // Temporary Variable
00011 GLuint type=GL_RGBA; // Set The Default GL Mode To RBGA (32 BPP)
00012 FILE *file = fopen(filename, "rb"); // Open The TGA Fi
00013 if( file==NULL || // Does File Even Exist?
00014 fread(TGAcompare,1,sizeof(TGAcompare),file)!=sizeof(TGAcompare) || // Are There 12 Bytes To Read?
00015 memcmp(TGAheader,TGAcompare,sizeof(TGAheader))!=0 || // Does The Header Match What We Want?
00016 fread(header,1,sizeof(header),file)!=sizeof(header)) // If So Read Next 6 Header Bytes
00017 {
00018 if (file == NULL) // Did The File Even Exist? *Added Jim Strong*
00019 {
00020 MessageBox(NULL,"Image file was not found","Error",MB_OK|MB_ICONERROR);
00021 return false; // Return False
00022 }
00023 if(TGAcompare[2] == 1)
00024 MessageBox(NULL,"Image cannot be indexed color. \r\n Convert the image to RGB or RGBA.","Error",MB_OK|MB_ICONERROR);
00025 if(TGAcompare[2] == 3)
00026 MessageBox(NULL,"Image cannot be greyscale color. \r\n Convert the image to RGB or RGBA.","Error",MB_OK|MB_ICONERROR);
00027 if(TGAcompare[2] == 9 || TGAcompare[2] == 10)
00028 MessageBox(NULL,"Image cannot be compressed. \r\n Convert the image to an uncompressed format.","Error",MB_OK|MB_ICONERROR);
00029 fclose(file); // If Anything Failed, Close The File
00030 return false; // Return False
00031 }
00032 texture->Width = header[1] * 256 + header[0]; // Determine The TGA Width (highbyte*256+lowbyte)
00033 texture->Height = header[3] * 256 + header[2]; // Determine The TGA Height (highbyte*256+lowbyte)
00034 if( texture->Width <=0 || // Is The Width Less Than Or Equal To Zero
00035 texture->Height <=0 || // Is The Height Less Than Or Equal To Zero
00036 (header[4]!=24 && header[4]!=32)) // Is The TGA 24 or 32 Bit?
00037 {
00038 fclose(file); // If Anything Failed, Close The File
00039 if(texture->Width <=0 || texture->Height <=0)
00040 MessageBox(NULL,"Image must have a width and height greater than 0","Error",MB_OK|MB_ICONERROR);
00041 if(header[4]!=24 && header[4]!=32)
00042 MessageBox(NULL,"Image must be 24 or 32 bit","Error",MB_OK|MB_ICONERROR);
00043 return false; // Return False
00044 }
00045 texture->Bpp = header[4]; // Grab The TGA's Bits Per Pixel (24 or 32)
00046 bytesPerPixel = texture->Bpp/8; // Divide By 8 To Get The Bytes Per Pixel
00047 imageSize = texture->Width*texture->Height*bytesPerPixel; // Calculate The Memory Required For The TGA Data
00048 texture->ImageData=(GLubyte *)malloc(imageSize); // Reserve Memory To Hold The TGA Data
00049 if( texture->ImageData==NULL || // Does The Storage Memory Exist?
00050 fread(texture->ImageData, 1, imageSize, file)!=imageSize) // Does The Image Size Match The Memory Reserved?
00051 {
00052 if(texture->ImageData!=NULL) // Was Image Data Loaded
00053 free(texture->ImageData); // If So, Release The Image Data
00054 MessageBox(NULL,"Image load failed for unknown reason.","Error",MB_OK|MB_ICONERROR);
00055 fclose(file); // Close The File
00056 return false; // Return False
00057 }
00058 for(GLuint i=0; i<int(imageSize); i+=bytesPerPixel) // Loop Through The Image Data
00059 { // Swaps The 1st And 3rd Bytes ('R'ed and 'B'lue)
00060 temp=texture->ImageData[i]; // Temporarily Store The Value At Image Data 'i'
00061 texture->ImageData[i] = texture->ImageData[i + 2]; // Set The 1st Byte To The Value Of The 3rd Byte
00062 texture->ImageData[i + 2] = temp; // Set The 3rd Byte To The Value In 'temp' (1st Byte Value)
00063 }
00064 fclose (file); // Close The File
00065
00066 // Build A Texture From The Data
00067 glGenTextures(1, &texture[0].TexID); // Generate OpenGL texture IDs
00068 glBindTexture(GL_TEXTURE_2D, texture[0].TexID);
00069 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
00070 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
00071 if (texture[0].Bpp==24) // Was The TGA 24 Bits
00072 {
00073 type=GL_RGB; // If So Set The 'type' To GL_RGB
00074 }
00075 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
00076 glTexImage2D(GL_TEXTURE_2D, 0, type, texture[0].Width, texture[0].Height, 0, type, GL_UNSIGNED_BYTE, texture[0].ImageData);
00077 gluBuild2DMipmaps(GL_TEXTURE_2D, type, texture[0].Width, texture[0].Height, type, GL_UNSIGNED_BYTE, texture[0].ImageData);
00078 free(texture->ImageData);
00079 return true; // Texture Building Went Ok, Return True
00080 }
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Definition at line 108 of file general.cpp.
00109 {
00110 float no_mat[] = { 0.0, 0.0, 0.0, 1.0 };
00111 float mat_ambient[] = { 0.4, 0.4, 0.4, 1.0 };
00112 float mat_diffuse[] = { 0.8, 0.8, 0.8, 1.0 };
00113 float mat_specular[] = { 0.9, 0.9, 0.9, 1.0 };
00114 float high_shininess[] = { 80.0 };
00115
00116 glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
00117 glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
00118 glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
00119 glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);
00120 glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
00121 }
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Definition at line 83 of file general.cpp.
00084 {
00085 glCullFace(GL_BACK);
00086 glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black
00087 glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
00088 glDepthFunc(GL_LESS); // The Type Of Depth Test To Do
00089 glEnable(GL_DEPTH_TEST); // Enables Depth Testing
00090 glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
00091 glEnable(GL_NORMALIZE);
00092 glEnable(GL_CULL_FACE);
00093 }
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Definition at line 95 of file general.cpp.
00096 {
00097 if (Height==0) // Prevent A Divide By Zero If The Window Is Too Small
00098 Height=1;
00099
00100 glViewport(0, 0, Width, Height); // Reset The Current Viewport And Perspective Transformation
00101 glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
00102 glLoadIdentity(); // Reset The Projection Matrix
00103 gluPerspective(45.0,(float)Width/(float)Height,0.1,200.0); // Calculate The Aspect Ratio Of The Window
00104 glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
00105 glLoadIdentity();
00106 }
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1.2.15