HW15-內插法的茶壺

#include <GL/glut.h>
float a=0;
float angle=0;
float angle01d=0;
float angleNew=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 = angle01d * (1-a) + angleNew *a;          
     }  
     glutPostRedisplay();
}

int main()
{
 glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
 glutCreateWindow("week15");
 glutKeyboardFunc(keyboard);
 glutDisplayFunc(display);
 glutMainLoop();  
}

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#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();
        glTranslatef(angle[3],angle[4],angle[5]);
        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; //內插公式
}
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();  
}

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#include <stdio.h>
#include <GL/glut.h>
float a = 0; //內插法比重
//有很多個角度都要做內插法怎麼辦? 利用陣列, 就可以存很多個角度了
float angle[20] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //用來轉動的角度，由angleOld, angleNew計算出
float angleOld[20] = {0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //舊的角度，用來做內插法
float angleNew[20] = {90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //新的角度，用來做內插法
int angleID = 0;
FILE *fout = NULL, *fin = NULL;

void display()
{
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glPushMatrix(); //1
      glRotatef(angle[0], 0,0,1);
      glutSolidTeapot(0.3);
     glPopMatrix();
     glPushMatrix(); //2
      glTranslatef(0.5, 0,0);
glRotatef(angle[1], 0,0,1);
glutSolidTeapot(0.3);
     glPopMatrix();
     glutSwapBuffers();
}
void readNext() //改變角度
{
if (fin == NULL) fin = fopen("this is my file for animation.txt", "r");
a += 0.1; //比重一直增加，角度才會變化
for( int i=0; i<=20; i++){ //全部打出來太遜了,  用for可以直接打20個,比葉問還厲害!
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) //計時器定時抓角度
{
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");

glutKeyboardFunc(keyboard);
glutDisplayFunc(display);
glutMainLoop();
}