计算机图形学实验_透视茶壶源代码

#include

#include

#include

using namespace std;

float fTranslate;

float fRotate;

float fScale=1.0f;//set inital scale value to 1.0f

bool bPersp=false;

bool bAnim=false;

bool bWire=false;

int wHeight=0;

int wWidth=0;

//todo

//hint:some additional parameters may needed here when you operate the teapot

void Draw_Leg()

{

glScalef(1,1,3);

glutSolidCube(1.0f);

//glutWireCone(1.0f);

}

//定义操作茶壶的操作参数

int tx=1;

int ty=0;

int tz=0;

int tangle=90;

//定义设置scale的参数

float sx=0.3f;

float sy=0.3f;

float sz=0.3f;

void Draw_Scene()

{

glPushMatrix();

glTranslatef(0,0,5);

glRotatef(tangle,tx,ty,tz);

// glutSolidTeapot(1);

glutSolidSphere(1.0f,10,10);

glPopMatrix();

glPushMatrix();

glTranslatef(0,0,3.5);

glScalef(5,4,1);

glutSolidCube(1.0);

glPopMatrix();

//leg1

glPushMatrix();

glTranslatef(1.5,1,1.5);

Draw_Leg();

glPopMatrix();

//leg2

glPushMatrix();

glTranslatef(-1.5,1,1.5);

Draw_Leg();

glPopMatrix();

//leg3

glPushMatrix();

glTranslatef(1.5,-1,1.5);

Draw_Leg();

glPopMatrix();

//leg4

glPushMatrix();

glTranslatef(-1.5,-1,1.5);

Draw_Leg();

glPopMatrix();

}

void updateView(int width,int height)

{

glViewport(0,0,width,height);//reset the current viewport

glMatrixMode(GL_PROJECTION);//select the projection matrix glLoadIdentity();//reset the projection matrix

float whRatio=(GLfloat)width/(GLfloat)height;

if(bPersp)

{

//todo when 'p'operation ,hint:use function glupersPective }

else

glOrtho(-3,3,-3,3,-100,100);

glMatrixMode(GL_MODELVIEW);//select the modelview matrix

}

void reshape(int width,int height)

{

if(height==0)//prevent a divide by zero by

{

height=1;

}

wHeight=height;

wWidth=width;

updateView(wHeight,wWidth);

}

void idle()

{

glutPostRedisplay();

}

float eye[]={0,0,8};

float center[]={0,0,0};

//todo:hint:you may need another array when you operate the teapot

void key(unsigned char k,int x,int y)

{

switch(k)

{

case 27:

case 'q':{exit(0);break;}

case 'p':{bPersp=!bPersp;updateView(wHeight,wWidth);break;}

case ' ':{bAnim=!bAnim;break;}

case 'o':{bWire=!bWire;break;}

case 'a':{center[0]=center[0]+1;break;}//todo ,hint:eye[]and center[]are the keys to solve the problems

case 'd':{center[0]=center[0]-1;break;}

case 'w':{center[2]=center[2]+1;break;}

case 's':{center[2]=center[2]-1;break;}

case 'z':{center[1]=center[1]+1;break;}

case 'c':{center[1]=center[1]-1;break;}

case 'r':{center[0]=0;center[1]=0;center[2]=0;};//恢复原状

//茶壶相关操作

case 'j':{tx++;break;}

case 'l':{tx--;break;}

case 'i':{ty++;break;}

case 'k':{ty--;break;}

case 'n':{tz++;break;}

case 'm':{tz--;ty--;break;}

case 'g':{sx=sy=sz=sx+0.05;break;}//放大

case 'f':{sx=sy=sz=sx-0.05;break;}//缩小

}

}

void redraw()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glLoadIdentity();

gluLookAt(eye[0],eye[1],eye[2],center[0],center[1],center[2],0,1,0);//场景（0，0,0）扥视点中心（0,5,50）Y轴向上

if(bWire)

{

glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);

}

else

{

glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);

}

glEnable(GL_DEPTH_TEST);

glEnable(GL_LIGHTING);

GLfloat white[]={1.0,1.0,1.0,1.0};

GLfloat light_pos[]={5,5,5,1};

glLightfv(GL_LIGHT0,GL_POSITION,light_pos);

glLightfv(GL_LIGHT0,GL_AMBIENT,white);

glEnable(GL_LIGHT0);

glRotatef(fRotate,0,0,1.0f);//ratate around y axis

glRotatef(-90,1,0,0);

glScalef(sx,sy,sz);

Draw_Scene();

if(bAnim)

fRotate+=0.3f;

//todo hint:when you want to rotate the teepot you may like to add another line here =

glutSwapBuffers();

}

int main(int argc,char*argv[])

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH|GLUT_DOUBLE);

glutInitWindowSize(480,480);

int windowHandle=glutCreateWindow("Simple GLUT App");

glutDisplayFunc(redraw);

glutReshapeFunc(reshape);

glutKeyboardFunc(key);

glutIdleFunc(idle);

glutMainLoop();

return 0;

}