畫線(但會消失)
void setup(){
size(400,400);
}
void draw(){
if(mousePressed) line(mouseX,mouseY,pmouseX,pmouseY);
}
void mouseReleased(){
background(255);
}
加了移動的小球(但有軌跡)
void setup(){
size(400,400);
}
float ghostX=400,ghostY=20;
void draw(){
ellipse(200,200,15,15);
if(mousePressed) line(mouseX,mouseY,pmouseX,pmouseY);
ellipse(ghostX,ghostY,15,15);
float dx=200-ghostX,dy=200-ghostY,len= sqrt(dx*dx+dy*dy);
ghostX +=dx/len/3;
ghostY +=dy/len/3;
}
void mouseReleased(){
background(255);
}
移動小球沒有軌跡
ArrayList<PVector> pt = new ArrayList<PVector>();
void setup(){
size(400,400);
background(255);
}
float ghostX=400,ghostY=20;
void mouseDragged(){
pt.add(new PVector(mouseX,mouseY));
}
void draw(){
background(255);
ellipse(200,200,15,15);
//if(mousePressed) line(mouseX,mouseY,pmouseX,pmouseY);
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
line(p.x,p.y,p2.x,p2.y);
}
ellipse(ghostX,ghostY,15,15);
float dx=200-ghostX,dy=200-ghostY,len= sqrt(dx*dx+dy*dy);
ghostX +=dx/len/3;
ghostY +=dy/len/3;
}
void mouseReleased(){
//background(255);
for(int i=pt.size()-1;i>=0;i--){
pt.remove(i);
}
}
void draw(){
background(255);
stroke(0); ellipse(200,200,15,15);
stroke(0); ellipse(ghostX,ghostY,15,15);
strokeWeight(4);
float dpx=0,dpy=0;
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
dpx += abs(p2.x-p.x);
dpy += abs(p2.y-p.y);
}
if(dpx>100&&dpy<40) stroke(255,0,0);
else stroke(0);
//if(mousePressed) line(mouseX,mouseY,pmouseX,pmouseY);
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
line(p.x,p.y,p2.x,p2.y);
}
增加藍線跟綠線(但勾勾有問題)
ArrayList<PVector> pt = new ArrayList<PVector>();
void setup(){
size(400,400);
background(255);
}
float ghostX=400,ghostY=20;
void mouseDragged(){
pt.add(new PVector(mouseX,mouseY));
}
void draw(){
background(255);
strokeWeight(1);
stroke(0); ellipse(200,200,15,15);
stroke(0); ellipse(ghostX,ghostY,15,15);
strokeWeight(4);
float dpx=0,dpy=0;
float rightdown=0 , rightup =0;
boolean green_part1= false,green_ok =false;
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
dpx += abs(p2.x-p.x);
dpy += abs(p2.y-p.y);
if(p2.x-p.x>0&&p2.y-p.y>0)rightdown +=sqrt(dpx*dpx+dpy*dpy);
if(p2.x-p.x>0&&p2.y-p.y<0)rightup +=sqrt(dpx*dpx+dpy*dpy);
ellipse(p.x,p.y,10,10);
if(green_part1==false && rightdown>150) green_part1= true;
else if(green_part1==true && rightup>150) green_ok =true;
}
if(dpx>100&&dpy<40) stroke(255,0,0);
else if(dpx<40&&dpy>100) stroke(0,0,255);
else if(green_ok) stroke(0,255,0);
else stroke(0);
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
line(p.x,p.y,p2.x,p2.y);
}
float dx=200-ghostX,dy=200-ghostY,len= sqrt(dx*dx+dy*dy);
ghostX +=dx/len/3;
ghostY +=dy/len/3;
}
void mouseReleased(){
//background(255);
for(int i=pt.size()-1;i>=0;i--){
pt.remove(i);
}
}
(最終結果)
ArrayList<PVector> pt = new ArrayList<PVector>();
void setup(){
size(400,400);
background(255);
}
float ghostX=400,ghostY=20;
void mouseDragged(){
pt.add(new PVector(mouseX,mouseY));
}
void draw(){
background(255);
strokeWeight(1);
stroke(0); ellipse(200,200,15,15);
stroke(0); ellipse(ghostX,ghostY,15,15);
strokeWeight(4);
float dpx=0,dpy=0;
float rightdown=0 , green_rightup =0;
float rightup=0 , yellow_rightdown =0;
boolean green_part1= false,green_ok =false;
boolean yellow_part1= false,yellow_ok =false;
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
dpx += abs(p2.x-p.x);
dpy += abs(p2.y-p.y);
if(p2.x-p.x>0&&p2.y-p.y>0)rightdown +=sqrt(dpx*dpx+dpy*dpy);
if(green_part1 && p2.x-p.x>0&&p2.y-p.y<0) green_rightup +=sqrt(dpx*dpx+dpy*dpy);
if(p2.x-p.x>0&&p2.y-p.y<0)rightup +=sqrt(dpx*dpx+dpy*dpy);
if(yellow_part1 && p2.x-p.x>0&&p2.y-p.y>0) yellow_rightdown +=sqrt(dpx*dpx+dpy*dpy);
//ellipse(p.x,p.y,10,10);
if(green_part1==false && rightdown>150) green_part1= true;
else if(green_part1==true && green_rightup>150) green_ok =true;
if(yellow_part1==false && rightup>150) yellow_part1= true;
else if(yellow_part1==true && yellow_rightdown>150) yellow_ok =true;
}
if(dpx>100&&dpy<40) stroke(255,0,0);
else if(dpx<40&&dpy>100) stroke(0,0,255);
else if(green_ok) stroke(0,255,0);
else if(yellow_ok) stroke(255,255,0);
else stroke(0);
for(int i=0;i<pt.size()-1;i++){
PVector p = pt.get(i),p2=pt.get(i+1);
line(p.x,p.y,p2.x,p2.y);
}
float dx=200-ghostX,dy=200-ghostY,len= sqrt(dx*dx+dy*dy);
ghostX +=dx/len/3;
ghostY +=dy/len/3;
}
void mouseReleased(){
//background(255);
for(int i=pt.size()-1;i>=0;i--){
pt.remove(i);
}
}
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