week07
1.產生圓
float x=250,y=0,vx=0,vy=3;
void setup(){
size(500,600);
}
void draw(){
background(255);
ellipse(x,y,50,50);
//y++;
//y=y+3;
y=y+vy;
}
2.產生兩個圓
float x=250,y=0,vx=0,vy=3;
float x2=150,y2=50,vx2=0,vy2=2;
void setup(){
size(500,600);
}
void draw(){
background(255);
ellipse(x,y,50,50);
ellipse(x2,y2,50,50);
y=y+vy;
y2=y2+vy2;
}
3.用for
float []x={250,150,350,300};
float []y={0,50,80,100};
float []vx={0,0,0,0};
float []vy={3,2,2.5,4};
void setup(){
size(500,600);
}
void draw(){
background(255);
for(int i=0;i<4;i++){
ellipse(x[i],y[i],50,50);
y[i]=y[i]+vy[i];
}
}
4.加上碰撞
float []x={250,150,350,300};
float []y={0,50,80,100};
float []vx={0,0,0,0};
float []vy={3,2,2.5,4};
void setup(){
size(500,600);
}
void draw(){
background(255);
for(int i=0;i<4;i++){
ellipse(x[i],y[i],50,50);
y[i]=y[i]+vy[i];
if(y[i]>600) vy[i]=-vy[i];
if(y[i]<0) vy[i]=-vy[i];
}
}
5.判斷碰撞
float []x={250,150,350,300};
float []y={0,50,80,100};
float []vx={0,0,0,0};
float []vy={3,2,2.5,4};
void setup(){
size(500,600);
}
void draw(){
background(255);
for(int i=0;i<4;i++){
fill(255,255,0); ellipse(x[i],y[i],50,50);
if(dist(mouseX,mouseY,x[i],y[i])<=50){
continue;
}
y[i]=y[i]+vy[i];
if(y[i]>600) vy[i]=-vy[i];
if(y[i]<0) vy[i]=-vy[i];
}
fill(255,0,0); ellipse(mouseX,mouseY,50,50);
}
6.boolean陣列
float []x={250,150,350,300};
float []y={0,50,80,100};
float []vx={0,0,0,0};
float []vy={3,2,2.5,4};
boolean []dead={false,false,false,false,false};//false=0,true=1
void setup(){
size(500,600);
}
void draw(){
background(255);
for(int i=0;i<4;i++){
if(dist(mouseX,mouseY,x[i],y[i])<=50){
dead[i]=true;
}
if(dead[i]==true) continue;
fill(255,255,0); ellipse(x[i],y[i],50,50);
y[i]=y[i]+vy[i];
if(y[i]>600) vy[i]=-vy[i];
if(y[i]<0) vy[i]=-vy[i];
}
fill(255,0,0); ellipse(mouseX,mouseY,50,50);
}
7.boolean練習
boolean down=true;
void setup(){
size(500,300);
}
void draw(){
if(mousePressed) down=true;
else down=false;
print(down);
if(down) background(255,0,0);
else background(0,255,0);
}
8.random亂數
float []x;
float []y;
float []vy;
boolean []dead;
int N=20;
void setup(){
size(500,600);
x=new float[N];
y=new float[N];
vy=new float[N];
dead=new boolean[N];
for(int i=0;i<N;i++){
x[i]=random(500);
y[i]=random(100,200);
vy[i]=random(3,4);
dead[i]=false;
}
}
void draw(){
background(255);
for(int i=0;i<N;i++){
if(dist(mouseX,mouseY,x[i],y[i])<=50){
dead[i]=true;
}
if(dead[i]==true) continue;
fill(255,255,0); ellipse(x[i],y[i],50,50);
y[i]=y[i]+vy[i];
if(y[i]>600) vy[i]=-vy[i];
if(y[i]<0) vy[i]=-vy[i];
}
fill(255,0,0); ellipse(mouseX,mouseY,50,50);
}
9.class物件導向
class Ball{
float x,y,vx,vy;
boolean dead;
Ball(){
x=random(500);
y=random(100,200);
vy=random(3,4);
dead=false;
}
void draw(){
if(dead==true) return;
ellipse(x,y,50,50);
if(dist(mouseX,mouseY,x,y)<50){
dead=true;
}
y=y+vy;
if(y>500) vy=-vy;
if(y<0) vy=-vy;
}
}
Ball []balls;
void setup(){
size(500,500);
balls=new Ball[20];
for(int i=0;i<20;i++){
balls[i]=new Ball();
}
}
void draw(){
background(255);
for(int i=0;i<20;i++){
balls[i].draw();
}
}
10.加變數
class Ball{//發明Ball物件
float x,y,vx,vy;
boolean dead;
Ball(){//建構同名
x=random(500);
y=random(500);
vy=random(-4,4);
vx=random(-4,4);
dead=false;
}
void draw(){
if(dead==true) return;
ellipse(x,y,50,50);
if(dist(mouseX,mouseY,x,y)<50){
dead=true;
}
x=x+vx;
y=y+vy;
if(y>500 || y<0) vy=-vy;
if(x>500 || x<0) vx=-vx;
}
}
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