1、
1-1:alpha內插
內插公式： alpha* 新的*(1-alpha)*舊的///以此表為範例，13=舊，90=新
1-2內插公式程式碼：
(需先按r再長按p，手臂就會緩緩上升)
#include <GL/glut.h>
#include <stdio.h>
float angle[20], oldX=0;
int angleID=0;
float NewAngle[20],OldAngle[20];
FILE * fout = NULL, * fin = NULL;
void myWrite(){
if(fout==NULL) fout = fopen("file.txt", "w+");
for(int i=0; i<20; i++){
printf( "%.2f", angle[i]);
fprintf(fout, "%.2f", angle[i]);
}
printf("\n");
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++){
OldAngle[i]=NewAngle[i];
fscanf(fin,"%f",&NewAngle[i]);
///fscanf(fin, "%f", &angle[i]);
}
glutPostRedisplay();
}
void myInterpolate(float alpha){
for(int i=0;i<20;i++){
angle[i]=alpha * NewAngle[i]+(1-alpha)*OldAngle[i];
printf("%.2f",angle[i]);
}
printf("\n");
glutPostRedisplay();
}
float alpha=0;
void keyboard( unsigned char key, int x, int y){
if(key=='p'){
myInterpolate(alpha);
alpha=(alpha+0.01);
if(alpha>1) alpha=alpha-1;
}
if( key=='r' ) myRead();
if( key=='s' ) myWrite();
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);
oldX = x;
glutPostRedisplay();
}
void display()
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glColor3f(1, 1, 1);
glRectf(0.3, 0.5, -0.3, -0.2);
glPushMatrix();
glTranslatef(0.3, 0.5, 0);
glRotatef(angle[0], 0, 0, 1);
glTranslatef(-0.3, -0.4, 0);
glColor3f(1, 0, 0);
glRectf(0.3, 0.5, 0.8, 0.3);
glPushMatrix();
glTranslatef(0.8, 0.4, 0);
glRotatef(angle[1], 0, 0 ,1);
glTranslatef(-0.8, -0.4, 0);
glColor3f(0, 1, 0);
glRectf(0.8, 0.5, 1.1, 0.3);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3, 0.5, 0);
glRotatef(angle[2], 0, 0, 1);
glTranslatef(+0.3, -0.4, 0);
glColor3f(1, 0, 0);
glRectf(-0.3, 0.5, -0.8, 0.3);
glPushMatrix();
glTranslatef(-0.8, 0.4, 0);
glRotatef(angle[3], 0, 0 ,1);
glTranslatef(+0.8, -0.4, 0);
glColor3f(0, 1, 0);
glRectf(-0.8, 0.5, -1.1, 0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit( &argc, argv );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
glutInitWindowSize(600, 600);
glutCreateWindow("week15 TRT angles again");
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutDisplayFunc( display );
glutMainLoop();
return 0;
}
2、
2-1利用timer做內插：
#include <GL/glut.h>
#include <stdio.h>
float angle[20], oldX=0;
int angleID=0;
float NewAngle[20],OldAngle[20];
FILE * fout = NULL, * fin = NULL;
void myWrite(){
if(fout==NULL) fout = fopen("file.txt", "w+");
for(int i=0; i<20; i++){
printf( "%.2f", angle[i]);
fprintf(fout, "%.2f", angle[i]);
}
printf("\n");
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++){
OldAngle[i]=NewAngle[i];
fscanf(fin,"%f",&NewAngle[i]);
}
glutPostRedisplay();
}
void myInterpolate(float alpha){
for(int i=0;i<20;i++){
angle[i]=alpha * NewAngle[i]+(1-alpha)*OldAngle[i];
printf("%.2f",angle[i]);
}
printf("\n");
glutPostRedisplay();
}
void timer(int t){
float alpha = (t%30)/30.0;///算出alpha
if(t%30==0)myRead();///等到30整除時，新舊交接
myInterpolate(alpha);
glutTimerFunc(33,timer,t+1);///開始做動畫
}
void keyboard( unsigned char key, int x, int y){
if(key=='p'){
myRead();///先讀一行
glutTimerFunc(0,timer,0);
}
if( key=='r' ) myRead();
if( key=='s' ) myWrite();
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);
oldX = x;
glutPostRedisplay();
}
void display()
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glColor3f(1, 1, 1);
glRectf(0.3, 0.5, -0.3, -0.2);
glPushMatrix();
glTranslatef(0.3, 0.5, 0);
glRotatef(angle[0], 0, 0, 1);
glTranslatef(-0.3, -0.4, 0);
glColor3f(1, 0, 0);
glRectf(0.3, 0.5, 0.8, 0.3);
glPushMatrix();
glTranslatef(0.8, 0.4, 0);
glRotatef(angle[1], 0, 0 ,1);
glTranslatef(-0.8, -0.4, 0);
glColor3f(0, 1, 0);
glRectf(0.8, 0.5, 1.1, 0.3);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3, 0.5, 0);
glRotatef(angle[2], 0, 0, 1);
glTranslatef(+0.3, -0.4, 0);
glColor3f(1, 0, 0);
glRectf(-0.3, 0.5, -0.8, 0.3);
glPushMatrix();
glTranslatef(-0.8, 0.4, 0);
glRotatef(angle[3], 0, 0 ,1);
glTranslatef(+0.8, -0.4, 0);
glColor3f(0, 1, 0);
glRectf(-0.8, 0.5, -1.1, 0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit( &argc, argv );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
glutInitWindowSize(600, 600);
glutCreateWindow("week15 TRT angles again");
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutDisplayFunc( display );
glutMainLoop();
return 0;
}
(先記錄4個動作，再長按p，手臂就會動)
3、
3-1:攝影機
先到https://jsyeh.org/3dcg10/
下載win32跟data
打開Projection
eye=從哪裡看
center=鏡頭中心在哪
up=
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