Plurk paste

#include<iostream.h>
#include<math.h>
#include<fstream.h>

#include<windows.h>
#include <GL/glut.h>

GLfloat windowWidth;
GLfloat windowHeight;


GLUquadricObj *quadObj = gluNewQuadric();



float X[101],Y[101];

GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // 重置OpenGL窗口大小
{
if (height==0) // 防止被零除
{
height=1; // ?Height??1
}

glViewport(0, 0, width, height); // 重置?前的?口

}

void myDisplay(void)
{
ifstream infile("a.txt");



for(int a=0;a<101;a++)
{

infile>>X[a]>>Y[a];
//cout<<X[a]<<Y[a]<<endl;
}
infile.close();

glClear(GL_COLOR_BUFFER_BIT);
//glPointSize(5.0f);
glColor3f(0.5f,0.3f,0.9f);
glBegin(GL_LINE_LOOP);

for(int i=0;i<101;i++)
{

glVertex2f(X[i],Y[i]);

}

glEnd();
/*
glColor3f(0.1,0.2,0.4);
glTranslatef(X[i],Y[i],0.0f);
gluCylinder(quadObj,0.05f,0.05f,0.5f,32,32);
*/
GLUquadricObj *quadratic;
quadratic=gluNewQuadric();
//柱
glPushMatrix();
// for (i=0;i<101;i++)
// {}
// glTranslatef(X[0],Y[0],0.0f);
gluCylinder(quadratic,0.05f,0.05f,0.5f,32,32);
glColor3f(0.5f,0.0f,0.9f);
//gluDisk(quadratic,0.0f,0.05f,32,32);
//glTranslatef(0.0f,0.0f,-0.5f);

//glColor3f(0.9f,0.8f,0.0f);

// glColor3f(0.1f,0.4f,0.5f);
//gluDisk(quadratic,0.0f,0.05f,32,32);
glPopMatrix();
glutSwapBuffers();
glFlush();

}

void TimerFunction(int value)
{
int i;
glutPostRedisplay();
glutTimerFunc(30,TimerFunction,1);

/**/ for (i=0;i<=100;i++)
{
glTranslatef(X[i],Y[i],0.0f);

}

}







void SpecialKeyHandler(int key,int x,int y)
{
if (key ==GLUT_KEY_UP)
{
// glRotatef(5.0,1.0,0.0,0.0); //旋轉
// glTranslatef( 0 , -5 , 0 ); //平移
glScalef( 1.1 , 1.1 , 1.1 ); //縮放
glutPostRedisplay(); //繪圖更新
}
if (key ==GLUT_KEY_DOWN)
{
// glRotatef(-5.0,1.0,0.0,0.0); //旋轉
// glTranslatef( 0 , -5 , 0 ); //平移
glScalef( 0.9 , 0.9 , 0.9 ); //縮放
glutPostRedisplay(); //繪圖更新
}
if (key ==GLUT_KEY_LEFT)
{
glRotatef(-5.0,1.0,0.0,0.0); //旋轉
// glTranslatef( 0 , -5 , 0 ); //平移
// glScalef( 0.9 , 0.9 , 0.9 ); //縮放
glutPostRedisplay(); //繪圖更新
}
if (key ==GLUT_KEY_RIGHT)
{
glRotatef(5.0,1.0,0.0,0.0); //旋轉
// glTranslatef( 0 , -5 , 0 ); //平移
// glScalef( 0.9 , 0.9 , 0.9 ); //縮放
glutPostRedisplay(); //繪圖更新
}
}




//Setup the rendering state (可控制桌布顏色)
void SetupRC(void)
{ glClearColor( 0.0f,0.0f,0.0f,1.0f);
glEnable(GL_DEPTH_TEST);
}

void WindowSize(int w, int h) //控制動態視窗大小
{
glViewport(0, 0, w, h); //當視窗長寬改變時，畫面也跟著變
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.5,2,-2,3,-3,10); //正交投影
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}

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

int i,k,n;
float X[101],Y[101],B[50][50],u[50],A[50],C[50],xv[10],yv[10],x,y;
float t;
u[0]=0;
u[1]=0;
u[2]=0;
u[3]=0;
u[4]=1;
u[5]=2;
u[6]=3;
u[7]=4;
u[8]=5;
u[9]=5;
u[10]=5;
u[11]=5;
xv[0]=-1; //控制點
xv[1]=0;
xv[2]=1;
xv[3]=1;
xv[4]=0;
xv[5]=-1;
xv[6]=-1;
xv[7]=-1;
yv[0]=-1;
yv[1]=-1.5;
yv[2]=-0.5;
yv[3]=2;
yv[4]=2;
yv[5]=1.5;
yv[6]=0.25;
yv[7]=-1;







for(n=0;n<=100;n++) //100等份
{
t=0.05*n; //1等份是0.05
for(i=0;i<=10;i++) //Basic Function
{
if(u[i]<=t&&t<u[i+1])
{
B[1][i]=1;
}
else
{
B[1][i]=0;
}
}
for(k=2;k<=4;k++)
{
for(i=0;i<=10;i++)
{
if(u[i+k-1]==u[i])
{
A[i]=0;
}
else
{
A[i]=((t-u[i])*B[k-1][i])/(u[i+k-1]-u[i]);
}
if(u[i+k]==u[i+1])
{
C[i]=0;
}
else
{
C[i]=((u[i+k]-t)*B[k-1][i+1])/(u[i+k]-u[i+1]);
}
B[k][i]=A[i]+C[i];
}

}
if(t==5)
{
B[4][7]=1;
} //Basic Function



x=0;
y=0;
for(i=0;i<=7;i++)
{
x=xv[i]*B[4][i]+x;
y=yv[i]*B[4][i]+y;
}
X[n]=x;
Y[n]=y;

}
ofstream outfile("a.txt");
for(i=0;i<101;i++)
{

outfile<<X[i]<<" "<<Y[i]<<endl;
//outfile<<Y[i]<<endl;
}
outfile.close();


glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
glutInitWindowPosition(50,50);
glutInitWindowSize(900,700);
glutCreateWindow("GO!");
glutSpecialFunc(SpecialKeyHandler);
glutDisplayFunc(myDisplay);
glutMainLoop();
glutTimerFunc(30,TimerFunction,1);
glutReshapeFunc(WindowSize);
SetupRC();

}