Step01:
1.alpha內插法
alpha:00.0~1.0
angle=alpha*new+(1-alpha)*old
2.讀入上週程式
#include <GL/glut.h>
#include <stdio.h>
float ang le[20],oldX=0;
int angleID=0;
FILE * fout=NULL,*fin=NULL;
void myWrite(){
if(fout==NULL) fout=fopen("file.txt","w");
for(int i=0;i<20;i++){
printf("%.1f ",angle[i]);
fprintf(fout,"%.1f ",angle[i]);
}
printf("\n");//跳行
fprintf(fout,"\n");
}
void myRead(){
if(fout!=NULL){fclose(fout);fout=NULL;}
if(fin==NULL) fin=fopen("file.txt","r");
for(int i=0;i<20;i++){
fscanf(fin, "%f", &angle[i]);
}
glutPostRedisplay();//重畫畫面
}
void keyboard(unsigned char key,int x,int y){
if(key=='s')myWrite();
if(key=='r')myRead();
if(key=='0')angleID=0;
if(key=='1')angleID=1;
if(key=='2')angleID=2;
if(key=='3')angleID=3;
}
void mouse(int button,int state,int x,int y){
oldX=x;
}
void motion(int x,int y){
angle[angleID]+=(x-oldX);
///myWrite();
oldX=x;
glutPostRedisplay();///重畫畫面
}
void display(){
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);
glRectf(0.3,0.5,-0.3,-0.5);///身體
glPushMatrix();
glTranslatef(0.3,0.4,0);///手臂掛到身體
glRotatef(angle[0],0,0,1);///旋轉
glTranslatef(-0.3,-0.4,0);///把手臂旋轉中心放到中心
glColor3f(1,0,0);///紅
glRectf(0.3,0.5,0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(0.7,.4,0);
glRotatef(angle[1],0,0,1);///旋轉
glTranslatef(-0.7,-0.4,0);///把手臂旋轉中心放到中心
glColor3f(0,1,0);///紅
glRectf(0.7,0.5,1.0,0.3);///下手臂
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3,0.4,0);///手臂掛到身體
glRotatef(angle[2],0,0,1);///旋轉
glTranslatef(0.3,-0.4,0);///把手臂旋轉中心放到中心
glColor3f(1,0,0);///紅
glRectf(-0.3,0.5,-0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(-0.7,.4,0);
glRotatef(angle[3],0,0,1);///旋轉
glTranslatef(0.7,-0.4,0);///把手臂旋轉中心放到中心
glColor3f(0,1,0);///紅
glRectf(-0.7,0.5,-1.0,0.3);///下手臂
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc,char** argv){
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("week15_ANGLE_TRT_Again");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
3.加入
void myInterpolate(float alpha){///alpha內插法
for(int i=0;i<20;i++){
angle[i]=alpha*Newangle[i]+(1-alpha)+Oldangle[i];
}
}
在keyboard()加
int t=0;
if(key=='p'){///按p逐步加入內插
if(t%30==0)myRead();
myInterpolate(t%30/30);
glutPostRedisplay();
t++;
}
修改mtRead()
float Newangle[20],Oldangle[20];
void myRead(){
if(fout!=NULL){fclose(fout);fout=NULL;}
if(fin==NULL) fin=fopen("file.txt","r");
for(int i=0;i<20;i++){
Oldangle[i]=Newangle[i];///原來新->舊
fscanf(fin, "%f", &Newangle[i]);///讀新的
}
glutPostRedisplay();//重畫畫面
}
4.加入timer()
void timer(int t){
if(t%50==0)myRead();
myInterpolate(t%50/50.0);
glutTimerFunc(20,timer,t+1);
}
5.修改keboard()
if(key=='p'){
myRead();
glutTimerFunc(0,timer,0);
}
Step02:
1.開啟projection.exe
類似從眼睛視角看出去
glutLookAt(0.00,0.00,2.00,0.00 眼睛
0.00,0.80,0.00 中心
0.00,1.00,0.00); 上方(向量)
aspect ratio 長寬比ex:16:9,4:3
3.寫入
#include <GL/glut.h>
void reshape(int w,int h){
const float ar = (float) w / (float) h;
glViewport(0, 0, w, h);///3D變2D
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60,ar,0.1,100);
glMatrixMode(GL_MODELVIEW);///3D Model+View
glLoadIdentity() ;
gluLookAt(0,0,3,
0,0,0,
0,1,0
);
}
void display(){
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSolidTeapot(1);
glutSwapBuffers();
}
int main(int argc,char** argv){
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week16");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
}
5.加入motion()
void motion(int x,int y){
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt((x-150/150.0,(y-150)/150.0,3,
0,0,0,
0,1,0
);
glutPostRedisplay();
}
在main加入
glutMotionFunc(motion);
