15週 角度內插

void keyboard(unsigned char key,int x,int y)
{
if(key=='r')
{
a+=0.1;
angle=angleOld*(1-a)+angleNew*a;
}
glutPostRedisplay();
}

#include<GL/glut.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};

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()

{

a+=0.1;

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

{

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

    }

}

void timer(int t)

{

glutTimerFunc(10,timer,0);

readNext();

glutPostRedisplay();

}

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

{

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();

}

#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("this is my file for animation.txt","r");

a+=0.05;

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

{

angleOld[i]=angleNew[i];

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

    }

}

void timer(int t)

{

glutTimerFunc(100,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("this_is_my_file_for_animation.txt","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");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutMainLoop();

}