OPENGL 纹理贴图旋转立方体(Nehe glut版)

深碍√TFBOYSˉ_ 2022-04-15 07:25 258阅读 0赞

\#define \_CRT\_SECURE\_NO\_WARNINGS  
\#pragma comment (lib,"glaux.lib")  
\#include <windows.h>  
\#include <gl\\gl.h>  
\#include <stdio.h>  
\#include <time.h>  
\#include <gl\\glu.h>  
\#include <gl\\glut.h>  
\#include <gl\\glaux.h>  
\#include <stdlib.h>  
GLuint texture\[1\];    //存储纹理数据  
GLfloat x = 0.0f,y = 0.0f,z = 0.0f;

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 NULL;  
   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\[1\];      // Create Storage Space For The Texture

memset(TextureImage,0,sizeof(void \*)\*1);           // Set The Pointer To NULL

// 装入bmp格式图像，并检查错误，工程下创建的文件夹data  
if (TextureImage\[0\]=LoadBMP("data/yazi.bmp"))  
\{  
   Status=TRUE;          // Set The Status To TRUE  
   glGenTextures(1, &texture\[0\]);      // 创建纹理  
   glBindTexture(GL\_TEXTURE\_2D, texture\[0\]);  
   glTexImage2D(GL\_TEXTURE\_2D, 0, 3, TextureImage\[0\]->sizeX, TextureImage\[0\]->sizeY, 0, GL\_RGB, GL\_UNSIGNED\_BYTE, TextureImage\[0\]->data);  
   glTexParameteri(GL\_TEXTURE\_2D,GL\_TEXTURE\_MIN\_FILTER,GL\_LINEAR);  
   glTexParameteri(GL\_TEXTURE\_2D,GL\_TEXTURE\_MAG\_FILTER,GL\_LINEAR);  
\}

if (TextureImage\[0\])          // If Texture Exists  
\{  
   if (TextureImage\[0\]->data)        // If Texture Image Exists  
   \{  
    free(TextureImage\[0\]->data);      // Free The Texture Image Memory  
   \}

free(TextureImage\[0\]);         // Free The Image Structure  
\}

return Status;           // Return The Status  
\}

void reshape(int width,int height)\{  
glViewport(0,0,(GLsizei)width,(GLsizei)height);  
glMatrixMode(GL\_PROJECTION);  
glLoadIdentity();  
gluPerspective(60,1,2,-5);  
glMatrixMode(GL\_MODELVIEW);  
glLoadIdentity();  
gluLookAt(0.0,0.0,6.0,0.0,0.0,0.0,0.0,1.0,0.0);//设置眼睛  
\}

void display(void)\{  
glPushMatrix();  
glClear(GL\_COLOR\_BUFFER\_BIT|GL\_DEPTH\_BUFFER\_BIT);  
glRotatef(x,1.0,0.0,0.0);  
glRotatef(y,0.0,1.0,0.0);  
glRotatef(z,0.0,0.0,1.0);  
glBindTexture(GL\_TEXTURE\_2D, texture\[0\]);  
    glBegin(GL\_QUADS);  
    glColor3f(1.0,1.0,1.0);  
   // 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);  
   // 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);  
   // 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);  
   // 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);  
   // 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);  
   // 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();  
glPopMatrix();  
    glutSwapBuffers();  
   x += 0.3f;  
    y += 0.2f;  
    z += 0.4f;  
  
\}

int Init(void)\{  
if (!LoadGLTextures())         // Jump To Texture Loading Routine ( NEW )  
\{  
   return 0;          // 没有加载成功  
\}  
glClearColor(0.0,0.0,0.0,0.0);  
glClearDepth(1.0f);  
glClear(GL\_COLOR\_BUFFER\_BIT|GL\_DEPTH\_BUFFER\_BIT);  
glEnable(GL\_TEXTURE\_2D);  
glEnable(GL\_DEPTH\_TEST);  
glDepthFunc(GL\_LEQUAL);  
glShadeModel(GL\_SMOOTH);  
return 1;  
\}  
int main(int argc,char \*\* argv)\{  
glutInit(&argc,argv);  
glutInitDisplayMode(GLUT\_RGB|GLUT\_DOUBLE|GLUT\_DEPTH);  
glutInitWindowPosition(300,400);  
glutInitWindowSize(600,600);  
glutCreateWindow("...");  
Init();  
glutDisplayFunc(display);  
glutIdleFunc(display);  
glutReshapeFunc(reshape);  
glutMainLoop();  
return 0;  
\}