opengl光照模型试验

学号：姓名：协作者：实验二题目：光照模型的实现第十四周星期四实验二光照模型的实现一、实验目的掌握OpenGL的光照及材质效果设置方法二、实验要求在Windows平台上用VC++结合GLUT做实验，要求掌握结合VC++和OpenGL的光照模型的理解及实现，实验完成后要求根据自己的成果撰写一份实验报告。

三、实验环境操作系统：Windows xp开发环境：VC++6.0以及GLUT图形交互设备：鼠标和键盘四、实验内容在实验一的基础上理解并实现添加各种光（环境光，发散光，镜面光，聚光），使效果更逼真以接近实际环境。

1、打开灯光，设置灯光的位置、方向、类别、颜色和衰减，并改变其值，观察效果的变化。

2、实现旋转和移动灯光。

3、设置材质，了解材质和光照如何相互影响。

五、存在的问题和感想Opengl是一个强大的图形设计工具，对于设计具有真实感的图形真的很有帮助，在学习opengl的过程中，遇到了许多问题，比如，光照效果函数的使用，什么环境光，漫射光，反射光，一开始总搞不懂这些光找出来的具体效果是怎样的，还有对三维空间，视点坐标，模型坐标的变换等等，通过学习，参考别的代码，初步了解了这些函数调用的效果，也感觉到了opengl功能的强大，给人的视觉效果等等。

学习opengl真的是充满了无穷的乐趣啊！六、结果测试1、球体、单色渲染、光照2、单击右键弹出选择菜单，选择正方体、单色渲染和光照3、单击右键弹出选择菜单，选择棱锥，单色渲染和光照4、单击右键选择平滑渲染，上下左右键旋转光源附件：#include<Common\OpenGLSB.h> #include<Common\GLTools.h> GLfloat xRot=0.0f;GLfloat yRot=0.0f;GLfloat xRot1=0.0f;GLfloat yRot1=0.0f;GLfloat lightColor[]={1.0f,1.0f,1.0f}; GLfloat white[]={1.0f,1.0f,1.0f}; GLfloatspecular[]={1.0f,1.0f,1.0f,1.0f}; GLfloatlightPos[]={0.0f,50.0f,0.0f,1.0f}; GLfloatlightDir[]={0.0f,1.0f,0.0f,1.0f}; GLfloatspecref[]={1.0f,1.0f,1.0f,1.0f}; GLfloatambientLight[]={0.5f,0.5f,0.5f,1.0f}; char textrueObject[]={"png1.png"};int iShape=1;int iModel=1;void DrawGround(void);void DrawCube(void);void DrawTriangle(void);void RenderScene(void){glClear(GL_COLOR_BUFFER_BI T|GL_DEPTH_BUFFER_BIT);if(iModel==1)glShadeModel(GL_FLAT);if(iModel==2)glShadeModel(GL_SMOOTH); glPushMatrix();glRotatef(xRot,0.0f,1.0f,0.0f);glRotatef(yRot,1.0f,0.0f,0.0f);glDisable(GL_LIGHTING); glLightfv(GL_LIGHT0,GL_POSITI ON,lightPos);glLightfv(GL_LIGHT0,GL_SPOT_ DIRECTION,lightDir); glTranslatef(lightPos[0],lightPos[1], lightPos[2]);glColor3f(1.0f,0.0f,0.0f);//glutSolidCone(3.0f,4.0f,15,15);glColor3f(0.0f,1.0f,0.0f);glutSolidSphere(2.0f,30,30); glPopMatrix();glPushMatrix();glRotatef(xRot1,0.0f,1.0f,0.0f);glRotatef(yRot1,1.0f,0.0f,0.0f);glEnable(GL_LIGHTING);if(iShape==1){glColor3f(0.0f,1.0f,1.0f); glutSolidSphere(25.0f,30,30);}if(iShape==2){DrawCube();}if(iShape==3){DrawTriangle();}glPopMatrix();glPushMatrix();glDisable(GL_LIGHTING);glTranslatef(0.0f,-50.0f,0.0f);glColor3f(0.0f,1.0f,1.0f);DrawGround();glPopMatrix(); glutSwapBuffers();}void SetupRC(void){glEnable(GL_DEPTH_TEST); glEnable(GL_DITHER); glFrontFace(GL_CCW);glEnable(GL_TEXTURE_3D); glEnable(GL_LIGHTING);//光源属性glLightModelfv(GL_LIGHT_MOD EL_AMBIENT, ambientLight); glLightfv(GL_LIGHT0,GL_DIFFU SE,ambientLight);glLightfv(GL_LIGHT0,GL_SPECU LAR,specular);glLightf(GL_LIGHT0,GL_SPOT_C UTOFF,120.0f);glLightfv(GL_LIGHT0,GL_SPECU LAR,white);glEnable(GL_LIGHT0);//设定材质属性glEnable(GL_COLOR_MATERIAL); glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE); glMaterialfv(GL_FRONT,GL_AM BIENT_AND_DIFFUSE,white);glMaterialfv(GL_FRONT,GL_SPECULAR,specref);glMateriali(GL_FRONT,GL_SHININESS,128); glClearColor(0.0f,0.0f,0.0f,1.0f);}void ChangeSize(int w, int h){GLfloat fAspect;if(h == 0)h = 1;glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION);glLoadIdentity();fAspect = (GLfloat) w / (GLfloat) h;gluPerspective(35.0f, fAspect, 1.0f, 500.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();glTranslatef(0.0f, 0.0f, -250.0f); }//键盘控制void SpecialKeys(int key,int x,int y){ if(key==GLUT_KEY_UP)xRot+=5.0f;if(key==GLUT_KEY_DOWN)xRot-=5.0f;if(key==GLUT_KEY_RIGHT)yRot+=5.0f;if(key==GLUT_KEY_LEFT)yRot-=5.0f; glutPostRedisplay();} //画正方体void DrawCube(void){ glPushMatrix();glBegin(GL_QUADS); glBindTexture(GL_TEXTURE_2D, textrueObject[0]);glColor3ub(255,255,255); glVertex3f(25.0f,25.0f,25.0f);glColor3ub( 255,255,0); glVertex3f(25.0f,-25.0f,25.0f);glColor3ub(255,0,0); glVertex3f(-25.0f,-25.0f,25.0f);glColor3ub(255,0,255); glVertex3f(-25.0f,25.0f,25.0f);glColor3f(0.0f, 1.0f, 1.0f); glVertex3f(25.0f,25.0f,-25.0f);glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(25.0f,-25.0f,-25.0f);glColor3f(0.0f, 0.0f, 0.0f); glVertex3f(-25.0f,-25.0f,-25.0f);glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(-25.0f,25.0f,-25.0f);glColor3f(0.0f, 1.0f, 1.0f); glVertex3f(25.0f,25.0f,-25.0f);glColor3f(1.0f, 1.0f, 1.0f);glVertex3f(25.0f,25.0f,25.0f);glColor3f(1.0f, 0.0f, 1.0f); glVertex3f(-25.0f,25.0f,25.0f);glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(-25.0f,25.0f,-25.0f);glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(25.0f,-25.0f,-25.0f);glColor3f(1.0f, 1.0f, 0.0f); glVertex3f(25.0f,-25.0f,25.0f);glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(-25.0f,-25.0f,25.0f);glColor3f(0.0f, 0.0f, 0.0f); glVertex3f(-25.0f,-25.0f,-25.0f);glColor3f(1.0f, 1.0f, 1.0f); glVertex3f(25.0f,25.0f,25.0f);glColor3f(0.0f, 1.0f, 1.0f); glVertex3f(25.0f,25.0f,-25.0f);glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(25.0f,-25.0f,-25.0f);glColor3f(1.0f, 1.0f, 0.0f); glVertex3f(25.0f,-25.0f,25.0f);glColor3f(1.0f, 0.0f, 1.0f); glVertex3f(-25.0f,25.0f,25.0f);glColor3f(0.0f, 0.0f, 1.0f); glVertex3f(-25.0f,25.0f,-25.0f);glColor3f(0.0f, 0.0f, 0.0f); glVertex3f(-25.0f,-25.0f,-25.0f);glColor3f(1.0f, 0.0f, 0.0f); glVertex3f(-25.0f,-25.0f,25.0f);glEnd();glPopMatrix();}//画底面void DrawGround(void){GLfloat fExtent=100.0f;GLfloat fStep=10.0f;GLfloat y=-10.0f;GLint iLine;glPushMatrix();glBegin(GL_LINES);for(iLine=-fExtent;iLine<=fExtent;i Line+=fStep){glVertex3f(iLine,y,fExtent);glVertex3f(iLine,y,-fExtent);glVertex3f(fExtent,y,iLine);glVertex3f(-fExtent,y,iLine); }glEnd();glBegin(GL_QUADS);glColor3f(1.0f,1.0f,.0f); glVertex3f(-100.0f,-10.0f,-100.0f); glVertex3f(100.0f,-10.0f,-100.0f); glVertex3f(100.0f,100.0f,-100.0f);glVertex3f(-100.0f,100.0f,-100.0f); glEnd();glPopMatrix();}//画四棱锥void DrawTriangle(void){ glPushMatrix();glBegin(GL_TRIANGLES);glColor3f(1.0f,0.0f,0.0f);glVertex3f(0.0f,25.0f,0.0f); glVertex3f(-25.0f,-25.0f,25.0f); glVertex3f(25.0f,-25.0f,25.0f);glColor3f(0.0f,1.0f,1.0f);glVertex3f(0.0f,25.0f,0.0f); glVertex3f(25.0f,-25.0f,25.0f); glVertex3f(25.0f,-25.0f,-25.0f);glColor3f(1.0f,0.0f,1.0f);glVertex3f(0.0f,25.0f,0.0f); glVertex3f(25.0f,-25.0f,-25.0f); glVertex3f(-25.0f,-25.0f,-25.0f);glColor3f(1.0f,1.0f,.0f);glVertex3f(0.0f,25.0f,0.0f); glVertex3f(-25.0f,-25.0f,-25.0f); glVertex3f(-25.0f,-25.0f,25.0f);glEnd();glBegin(GL_QUADS); glVertex3f(25.0f,-25.0f,25.0f); glVertex3f(25.0f,-25.0f,-25.0f);glVertex3f(-25.0f,-25.0f,-25.0f);glColor3f(1.0f,1.0f,0.0f); glVertex3f(-25.0f,-25.0f,25.0f);glEnd();glPopMatrix();}void TimerFunction(int value){// yRot1+=5.0f;xRot1+=5.0f; glutPostRedisplay(); glutTimerFunc(100,TimerFunction, 1);}void Menu(int value){switch(value){case 1:iShape=1;break;case 2:iShape=2;break;case 3:iShape=3;break;case 4:iModel=1;break;case 5:iModel=2;break;}glutPostRedisplay();}int main(int argc,char* argv[]){int nMenu;//初始化窗口glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOU BLE|GLUT_RGB|GLUT_DEPTH); glutInitWindowSize(800,600); glutCreateWindow("光照");//创建右键选择菜单nMenu=glutCreateMenu(Menu);glutAddMenuEntry("球体",1); glutAddMenuEntry("立方体",2); glutAddMenuEntry("圆锥体",3); glutAddMenuEntry("单色",4); glutAddMenuEntry("平滑",5); glutAttachMenu(GLUT_RIGHT_B UTTON);glutReshapeFunc(ChangeSize);glutSpecialFunc(SpecialKeys); glutTimerFunc(100,TimerFunction, 1);glutDisplayFunc(RenderScene); SetupRC();glutMainLoop();return 0;}。