WeeK15

#include <GL/glut.h>
float a=0;
float angle=0,anglex=0,angley=90;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void keyboard(unsigned char key, int x, int y)
{
if(key=='r')
{
a+=0.1;
angle=anglex*(1-a)+angley*a;
}
glutPostRedisplay();
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week15");

glutKeyboardFunc(keyboard);
glutDisplayFunc(display);
glutMainLoop();
}
*內插公式：anglex*(1-比重)+angley*比重

#include <GL/glut.h>

float a=0;//比重 

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

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

float angley[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 keyboard(unsigned char key, int x, int y)

{

if(key=='r')

{

a+=0.1;

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

angle[i]=anglex[i]*(1-a)+angley[i]*a;

}

glutPostRedisplay();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week15");

glutKeyboardFunc(keyboard);

glutDisplayFunc(display);

glutMainLoop();

}

*使用Timer按P之後自動旋轉

#include <GL/glut.h>

float a=0;//比重 

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

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

float angley[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]=anglex[i]*(1-a)+angley[i]*a;

}

void timer(int t)

{

glutTimerFunc(100,timer,0);//每100ms動一次 

readNext();

glutPostRedisplay();

}

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

{

if(key=='r')readNext();

else if(key=='p')glutTimerFunc(0,timer,0);//立即播放 

glutPostRedisplay();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week15");

glutKeyboardFunc(keyboard);

glutDisplayFunc(display);

glutMainLoop();

}

*滑鼠控制旋轉和紀錄角度

#include <stdio.h> 

#include <GL/glut.h>

float a=0;//比重 

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

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

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

FILE *fout=NULL, *fin=NULL;

int angleID=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()

{

if(fin==NULL)fin=fopen("this_is_my_file_for_animation.txt","r");

a+=0.05;

for(int i=0;i<20;i++)angle[i]=anglex[i]*(1-a)+angley[i]*a;

if(a>1.0)

{

a=0.0;

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

{

anglex[i]=angley[i];

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

}

}

}

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 timer(int t)

{

glutTimerFunc(100,timer,0);//每100ms動一次 

readNext();

glutPostRedisplay();

}

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

{

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

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

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);//立即播放 

glutPostRedisplay();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week15");

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutKeyboardFunc(keyboard);

glutDisplayFunc(display);

glutMainLoop();

}