OpenGL雾化特效源码

//sample.cpp #include <gl\glos.h> #include <gl\gl.h>//OpenGL32库的头文件 #include <gl\glu.h>//Glu32库的头文件 #include <gl\glut.h>//OpenGL实用库的头文件 #include <gl\glaux.h>//GLaux库的头文件 #include "windows.h" void myinit(void); void CALLBACK display(void); void CALLBACK reshape(GLsizei w,GLsizei h); void myinit(void) { auxInitDisplayMode(AUX_SINGLE|AUX_RGBA); auxInitPosition(0,0,500,500); auxInitWindow((LPCWSTR)"sample1"); glClearColor(0.0,0.0,0.0,0.0); glClear(GL_COLOR_BUFFER_BIT); GLfloat mat_ambient[]={0.0,0.1,0.8,1.0}; GLfloat mat_diffuse[]={0.0,0.3,0.6,1.0}; GLfloat mat_specular[]={1.0,0.0,1.0,1.0}; GLfloat mat_shininess[]={15.0}; GLfloat position[]={5.0,5.0,5.0,0.0}; GLfloat fogColor[4]={0.6,0.6,0.0,1.0}; glMaterialfv(GL_FRONT,GL_AMBIENT,mat_ambient); glMaterialfv(GL_FRONT,GL_DIFFUSE,mat_diffuse); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess); glLightfv(GL_LIGHT0,GL_POSITION,position); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glFrontFace(GL_CW); // glEnable(GL_POLYGON_SMOOTH); // glEnable(GL_BLEND); // glBlendFunc(GL_SRC_ALPHA,GL_ONE); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); //启用雾化处理 glEnable(GL_FOG); { //采用线性变化的雾化效果 glFogi(GL_FOG_MODE,GL_LINEAR); //指定雾化颜色（黄色） glFogfv(GL_FOG_COLOR,fogColor); //指定按线性变化时计算公式的参量 glFogf(GL_FOG_START,3.0); glFogf(GL_FOG_END,15.0); //规定雾化效果的质量 glHint(GL_FOG_HINT,GL_DONT_CARE); } // glShadeModel(GL_FLAT); } void CALLBACK reshape(GLsizei w,GLsizei h) { glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(w<=h*3) glOrtho(-6.0,6.0,-2.0*(GLfloat)h*3/(GLfloat)w, 2.0*(GLfloat)h*3/(GLfloat)w,0.0,10.0); else glOrtho(-6.0*(GLfloat)h/(GLfloat)w, 6.0*(GLfloat)h/(GLfloat)w,-2.0,2.0,0.0,10.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void CALLBACK display(void) { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); //在不同远近（Z方向）绘制同样大小、颜色的环，显示雾化的效果 glPushMatrix(); glTranslatef(-3.0,-1.5,-3.0); auxSolidTorus(0.6,1.5); glPopMatrix(); glPushMatrix(); glTranslatef(-0.5,-0.5,-6.0); auxSolidTorus(0.6,1.5); glPopMatrix(); glPushMatrix(); glTranslatef(2.0,0.5,-8.0); auxSolidTorus(0.6,1.5); glPopMatrix(); glFlush(); } void main(void) { myinit(); auxReshapeFunc(reshape); auxMainLoop(display); } //end of sample