利用Excel來了解Alpha
B is Alpha
Alpha * New + ( 1-Alpha ) * Old
這裡的程式碼是用Week 14的，連結 Week14
在編輯動作時會一直存檔，但我們需要的是存最重要的動作
更改成紅色部分的樣子，就可以只在需要的時候存檔
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=='r'){
readAll();
glutPostRedisplay();
}else if(key=='p'){
glutTimerFunc(20, timer, 0);
}else if(key=='s'){
void saveAll();///要先宣告
saveAll();
}
}
void mouse(int button, int state, int x, int y)
{
oldX=x; oldY=y;
}
void saveAll()
{
if(fout==NULL) fout=fopen("motion.txt", "w+");
for(int i=0; i<10; i++){
printf("%d ", angle[i]);
fprintf(fout, "%d ", angle[i]);
}
printf("\n");
fprintf(fout, "\n");
}
void motion(int x, int y)
{
angle[angleID] += (x-oldX);
oldX=x;
///saveAll();
glutPostRedisplay();
}
利用Alpha的的方式讓剛剛所存的東西跑起來
int oldAngle[10];///舊的
int newAngle[10];///新的
void timer(int t){
glutTimerFunc(100, timer, t+1);
if(t==0){///第一次進入，先讀新的
if(fin==NULL) fin=fopen("motion.txt","r");
for(int i=0;i<10;i++){
fscanf(fin,"%d",&newAngle[i]);
}
}
float alpha = (t%10)/10.0;///讓alpha 介於0-1之間
if(t%10==0){
for(int i=0;i<10;i++) {
oldAngle[i] = newAngle[i];
fscanf(fin,"%d",&newAngle[i]);
printf("%d \n",newAngle[i]);
}
}
for(int i=0;i<10;i++){
angle[i] = alpha*newAngle[i]+(1-alpha)*oldAngle[i];///內插
}
///readAll();///Remove
glutPostRedisplay();
}
把位置的移動加進去
#include <GL/glut.h>
///int angle[10]={0,0,0,0,0, 0,0,0,0,0};///如果關節要變多
int angle[20]={};
///可以讓移動也加進去 x,y
void display()
{...}
int angleID=0;
int oldX=0, oldY=0;
#include <stdio.h>
FILE * fout=NULL;
FILE * fin=NULL;
void readAll()
{
if(fin==NULL) fin=fopen("motion.txt", "r" );
for(int i=0; i<20; i++){
///scanf( "%d", &a[i]);
fscanf(fin,"%d", &angle[i]);/
}
}
int oldAngle[20];
int newAngle[20];
void timer(int t)
{
glutTimerFunc(20, timer, t+1);
if(t==0){
if(fin==NULL) fin=fopen("motion.txt", "r");
for(int i=0; i<20; i++){
fscanf(fin, "%d", &newAngle[i]);
}
}
float alpha = (t%30)/30.0;
if( t%30==0 ){///每次進入橙色區域,就再做一次調整
for(int i=0; i<20; i++){
oldAngle[i] = newAngle[i];
fscanf(fin, "%d", &newAngle[i]);
}
}
for(int i=0; i<20; i++){
angle[i] = alpha*newAngle[i] + (1-alpha)*oldAngle[i];
}
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=='a') angleID=11;
if(key=='r'){
readAll();
glutPostRedisplay();
}else if(key=='p'){
glutTimerFunc(20, timer, 0);
}else if(key=='s'){
void saveAll();
saveAll();
}
}
void mouse(int button, int state, int x, int y)
{
...
}
void saveAll()
{
if(fout==NULL) fout=fopen("motion.txt", "w+");
for(int i=0; i<20; i++){
printf("%d ", angle[i]);
fprintf(fout, "%d ", angle[i]);
}
printf("\n");
fprintf(fout, "\n");
}
void motion(int x, int y)
{
angle[angleID] += (x-oldX);
if(angleID==11){
angle[angleID+1] += (oldY-y);
}
oldX=x; oldY=y;
glutPostRedisplay();
}
int main(int argc, char**argv)
{
...
}
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