OpenGL绘制旋转六面体并纹理贴图.zip

#include "windows.h" #include <GL/gl.h> #include <GL/glu.h> #include <GL/glaux.h> #include <stdio.h> bool myinit(void); int LoadGLTextures(); void CALLBACK myReshape(GLsizei w, GLsizei h); void CALLBACK stepDisplay(void); void CALLBACK startIdleFunc(AUX_EVENTREC* event); void CALLBACK stopIdleFunc(AUX_EVENTREC* event); void CALLBACK display(void); GLfloat xrot = 0; // X Rotation GLfloat yrot = 0; // Y Rotation GLfloat zrot = 0; // Z Rotation GLuint texture[6]; // Storage For Six Texture bool myinit(void) { if (!LoadGLTextures()) // Jump To Texture Loading Routine { return FALSE; // If Texture Didn't Load Return FALSE } GLfloat fogColor[4] = { 0.2, 0.3, 0.6, 1.0 }; glEnable(GL_FOG); { glFogi(GL_FOG_MODE, GL_LINEAR); glFogfv(GL_FOG_COLOR, fogColor); glFogf(GL_FOG_START, 3.0); glFogf(GL_FOG_END, 15.0); glHint(GL_FOG_HINT, GL_DONT_CARE); } glEnable(GL_TEXTURE_2D); // Enable Texture Mapping glShadeModel(GL_SMOOTH); // Enable Smooth Shading glClearColor(0.1f, 0.8f, 0.5f, 0.0f); // Black Background glClearDepth(1.0f); // Depth Buffer Setup glEnable(GL_DEPTH_TEST); // Enables Depth Testing glDepthFunc(GL_LESS); // The Type Of Depth Testing To Do glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations return TRUE; } AUX_RGBImageRec* LoadBMP(char* Filename) // Loads A Bitmap Image { FILE* File = NULL; // File Handle if (!Filename) // Make Sure A Filename Was Given { return NULL; // If Not Return NULL } File = fopen(Filename, "r"); // Check To See If The File Exists if (File) // Does The File Exist? { fclose(File); // Close The Handle return auxDIBImageLoad(Filename); // Load The Bitmap And Return A Pointer } return NULL; // If Load Failed Return NULL } int LoadGLTextures() // Load Bitmaps And Convert To Textures { int Status = FALSE; // Status Indicator AUX_RGBImageRec* TextureImage[6]; // Create Storage Space For The Texture memset(TextureImage, 0, sizeof(void*) * 6); // Set The Pointer To NULL // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit if ((TextureImage[0] = LoadBMP("Data/NeHe.bmp")) && (TextureImage[1] = LoadBMP("Data/1.bmp")) && (TextureImage[2] = LoadBMP("Data/2.bmp")) && (TextureImage[3] = LoadBMP("Data/3.bmp")) && (TextureImage[4] = LoadBMP("Data/4.bmp")) && (TextureImage[5] = LoadBMP("Data/5.bmp"))) { Status = TRUE; // Set The Status To TRUE for (int i = 0; i < 6; i++) { glGenTextures(i + 1, &texture[i]); glBindTexture(GL_TEXTURE_2D, texture[i]); glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[i]->sizeX, TextureImage[i]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[i]->data); //glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[i]->sizeX, TextureImage[i]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[i]->data); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); } for (int i = 0; i < 6; i++) { if (TextureImage[i]) // If Texture Exists { if (TextureImage[i]->data) // If Texture Image Exists { free(TextureImage[i]->data); // Free The Texture Image Memory } free(TextureImage[i]); // Free The Image Structure } } } return Status; // Return The Status } //set rotate values void CALLBACK stepDisplay(void) { xrot += 1.0f; if (xrot > 360.0) xrot = xrot - 360.0; yrot += 2.0f; if (xrot > 360) yrot = yrot - 360; zrot += 3.0f; if (zrot > 360.0) zrot = zrot - 360.0; display(); } //when press leftmouse down ,start the rotation void CALLBACK startIdleFunc(AUX_EVENTREC* event) { auxIdleFunc(stepDisplay); } //when press rightmouse down ,stop the rotation void CALLBACK stopIdleFunc(AUX_EVENTREC* event) { auxIdleFunc(0); } void CALLBACK display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer glLoadIdentity(); // Reset The View glTranslatef(0.0f, 0.0f, -10.0f); glRotatef(yrot, 0.0f, 1.0f, 0.0f); glRotatef(xrot, 1.0f, 0.0f, 0.0f); glRotatef(zrot, 0.0f, 0.0f, 1.0f); glBindTexture(GL_TEXTURE_2D, texture[0]); glBegin(GL_QUADS); // Front Face glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D, texture[1]); glBegin(GL_QUADS); // Back Face glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D, texture[2]); glBegin(GL_QUADS); // Top Face glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D, texture[3]); glBegin(GL_QUADS); // Bottom Face glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, -1.0f, -1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D, texture[4]); glBegin(GL_QUADS); // Right face glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); glEnd(); glBindTexture(GL_TEXTURE_2D, texture[5]); glBegin(GL_QUADS); // Left Face glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); glEnd(); glFlush(); auxSwapBuffers();/* 交换缓存 */ } void CALLBACK myReshape(GLsizei w, GLsizei h) { glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if (w <= h) glOrtho(-1.5, 1.5, -1.5 * (GLfloat)h / (GLfloat)w, 1.5 * (GLfloat)h / (GLfloat)w, -15.0, 15.0); else glOrtho(-1.5 * (GLfloat)w / (GLfloat)h, 1.5 * (GLfloat)w / (GLfloat)h, -1.5, 1.5, -15.0, 15.0); //gluPerspective(25.0f,(GLfloat)w/(GLfloat)h,1.0f,100.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void main(void) { auxInitDisplayMode(AUX_DOUBLE | AUX_RGBA); auxInitPosition(0, 0, 640, 480); auxInitWindow("立方体纹理贴图"); myinit(); auxReshapeFunc(myReshape); auxIdleFunc(stepDisplay); auxMouseFunc(AUX_LEFTBUTTON, AUX_MOUSEDOWN, startIdleFunc); auxMouseFunc(AUX_RIGHTBUTTON, AUX_MOUSEDOWN, stopIdleFunc); auxMainLoop(display); }