OpenGL源代码学习.rar_nehe opengl_opengl neHe

//例17-1 双缓存动画例程（dbufcolr.c） #include <windows.h>//#include "glos.h" #include <GL/gl.h> #include <GL/glu.h> #include <GL/glaux.h> /* 定义旋转和比例因子的初始值 */ GLfloat step=0.0,s=0.1; /* 定义立方体的顶点坐标值 */ static GLfloat p1[]={0.5,-0.5,-0.5},p2[]={0.5,0.5,-0.5}, p3[]={0.5,0.5,0.5},p4[]={0.5,-0.5,0.5}, p5[]={-0.5,-0.5,0.5},p6[]={-0.5,0.5,0.5}, p7[]={-0.5,0.5,-0.5},p8[]={-0.5,-0.5,-0.5}; /* 定义立方体的顶点方向值 */ static GLfloat m1[]={1.0,0.0,0.0},m2[]={-1.0,0.0,0.0}, m3[]={0.0,1.0,0.0},m4[]={0.0,-1.0,0.0}, m5[]={0.0,0.0,1.0},m6[]={0.0,0.0,-1.0}; /* 定义立方体的顶点颜色值 */ static GLfloat c1[]={0.0,0.0,1.0}, c2[]={0.0,1.0,1.0}, c3[]={1.0,1.0,1.0}, c4[]={1.0,0.0,1.0}, c5[]={1.0,0.0,0.0}, c6[]={1.0,1.0,0.0}, c7[]={0.0,1.0,0.0}, c8[]={1.0,1.0,1.0}; void myinit(void); 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); void DrawColorBox(void); void myinit(void) { GLfloat light_ambient[]={0.3,0.2,0.5}; GLfloat light_diffuse[]={1.0,1.0,1.0}; GLfloat light_position[] = { 2.0, 2.0, 2.0, 1.0 }; GLfloat light1_ambient[]={0.3,0.3,0.2}; GLfloat light1_diffuse[]={1.0,1.0,1.0}; GLfloat light1_position[] = { -2.0, -2.0, -2.0, 1.0 }; glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0, GL_POSITION, light_position); glLightfv(GL_LIGHT1, GL_AMBIENT, light1_ambient); glLightfv(GL_LIGHT1, GL_DIFFUSE, light1_diffuse); glLightfv(GL_LIGHT1, GL_POSITION, light1_position); glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_LIGHT1); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); glColorMaterial(GL_FRONT_AND_BACK,GL_DIFFUSE); glEnable(GL_COLOR_MATERIAL); } void CALLBACK display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); s+=0.005; if(s>1.0) s=0.1; glPushMatrix(); glScalef(s,s,s); glRotatef(step,0.0,1.0,0.0); glRotatef(step,0.0,0.0,1.0); glRotatef(step,1.0,0.0,0.0); DrawColorBox(); glPopMatrix(); glFlush(); auxSwapBuffers();/* 交换缓存 */ } void CALLBACK stepDisplay (void) { step = step + 1.0; if (step > 360.0) step = step - 360.0; display(); } void CALLBACK startIdleFunc (AUX_EVENTREC *event) { auxIdleFunc(stepDisplay); } void CALLBACK stopIdleFunc (AUX_EVENTREC *event) { auxIdleFunc(0); } 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, 1.50*(GLfloat)h/(GLfloat)w, -10.0, 10.0); else glOrtho (-1.5*(GLfloat)w/(GLfloat)h, 1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void DrawColorBox(void) { glBegin(GL_QUADS); glColor3fv(c1); glNormal3fv(m1); glVertex3fv(p1); glColor3fv(c2); glVertex3fv(p2); glColor3fv(c3); glVertex3fv(p3); glColor3fv(c4); glVertex3fv(p4); glColor3fv(c5); glNormal3fv(m5); glVertex3fv(p5); glColor3fv(c6); glVertex3fv(p6); glColor3fv(c7); glVertex3fv(p7); glColor3fv(c8); glVertex3fv(p8); glColor3fv(c5); glNormal3fv(m3); glVertex3fv(p5); glColor3fv(c6); glVertex3fv(p6); glColor3fv(c3); glVertex3fv(p3); glColor3fv(c4); glVertex3fv(p4); glColor3fv(c1); glNormal3fv(m4); glVertex3fv(p1); glColor3fv(c2); glVertex3fv(p2); glColor3fv(c7); glVertex3fv(p7); glColor3fv(c8); glVertex3fv(p8); glColor3fv(c2); glNormal3fv(m5); glVertex3fv(p2); glColor3fv(c3); glVertex3fv(p3); glColor3fv(c6); glVertex3fv(p6); glColor3fv(c7); glVertex3fv(p7); glColor3fv(c1); glNormal3fv(m6); glVertex3fv(p1); glColor3fv(c4); glVertex3fv(p4); glColor3fv(c5); glVertex3fv(p5); glColor3fv(c8); glVertex3fv(p8); glEnd(); } void main(void) { auxInitDisplayMode (AUX_DOUBLE | AUX_RGBA);/* 设置双缓存和RGBA颜色模式*/ auxInitPosition (0, 0, 500,400); auxInitWindow ("Double_Buffer_Animation"); myinit(); auxReshapeFunc (myReshape); auxIdleFunc (stepDisplay); auxMouseFunc (AUX_LEFTBUTTON, AUX_MOUSEDOWN, startIdleFunc); auxMouseFunc (AUX_RIGHTBUTTON, AUX_MOUSEDOWN, stopIdleFunc); auxMainLoop(display); } //以上程序运行结果是在屏幕上显示一个不断旋转和由小到大变化的五彩立方体。