week15

(可自動播放)

#include <GL/glut.h>

#include <stdio.h>

float a=0;

float angle[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

float angleOld[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

float angleNew[20]={90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

int angleID=0;

FILE *fout = NULL ,*fin = NULL;

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glRotatef(angle[0],0,0,1);

glutSolidTeapot(0.3);

glPopMatrix();

glPushMatrix();

glTranslatef(0.5,0,0);

glRotatef(angle[1],0,0,1);

glutSolidTeapot(0.3);

glPopMatrix();

glutSwapBuffers();

}

void readNext()

{

if(fin==NULL) fin=fopen("my_file_for_animation","r");

a+=0.05;

for(int i=0;i<20;i++)

{

angle[i]=angleOld[i]*(1-a)+angleNew[i]*a;

}

if(a>=1.0)

{

a=0.0;

for(int i=0;i<20;i++)

{

angleOld[i]=angleNew[i];

fscanf(fin,"%f",&angleNew[i]);

}

}

}

void Timer(int t)

{

glutTimerFunc(50,Timer,0);

readNext();

glutPostRedisplay();

}

int OldX=0,OldY=0;

void mouse(int button, int state,int x,int y)

{

OldX=x; OldY=y;

}

void motion(int x,int y)

{

angle[angleID]+=(x-OldX);

OldX=x;

glutPostRedisplay();

}

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

{

if(key=='0') angleID=0;

if(key=='1') angleID=1;

if(key=='2') angleID=2;

if(key=='3') angleID=3;

if(key=='s')

{

if(fout==NULL) fout=fopen("my_file_for_animation","w+");

for(int i=0;i<20;i++)

{

printf("%f",angle[i]);

fprintf(fout,"%f",angle[i]);

}

printf("\n");

fprintf(fout,"\n");

}

if(key=='r')

{

readNext();

}

else if(key=='p')

{

glutTimerFunc(0,Timer,0);

}

glutPostRedisplay();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("Week15");

glutKeyboardFunc(keyboard);

glutDisplayFunc(display);

glutMainLoop();

}