*交PVector如何使用*
程式碼:
size(600,600);
PImage img=loadImage("img.jpg");
PVector pt=new PVector(10,20,0);
image(img,0,0);
println(pt.x);
///之前的
float userX=10,userY=20,userZ=0;
float user2X=30,user2Y=40,user2Z=0;
//現在可以以使用物件處理
PVector user=new PVector(10,20,0);
PVector user2=new PVector(30,40,0);
*做憤怒鳥，球會射出去*
程式碼:
PVector user; //(1)外面宣告,setup()及draw()都看的到
PVector Y,v=null;//彈弓,v飛行速度
void setup(){
size(600,400);
user = new PVector(100,300);//(2)只在setup() new一次
Y = new PVector(100,300);
}
void draw(){
background(255);
line(user.x, user.y, Y.x, Y.y);
textSize(40);
fill(255,0,0); text("Y", Y.x, Y.y);
fill(255); ellipse(user.x, user.y,20,20);//(3)用他的值
if(v!=null) user.add(v);
}
void mouseDragged(){
user.x=mouseX;
user.y=mouseY;
}
void mouseReleased(){
PVector diff = PVector.sub(Y, user);
v = diff.div(10);
}
*控制按鈕的方向，球會跟著移動*
P語言:
import processing.serial.*;
Serial myPort;
void setup(){
size(256,256);
myPort = new Serial(this,"COM3",9600);
}
int ballX=0, ballY=0;
void draw(){
if(myPort.available()>=3){
int x = myPort.read();
int y = myPort.read();
int sw = myPort.read();
ballX = x;
ballY = y;
}
ellipse(ballX,ballY,10,10);
}
Arduino:
void setup() {
pinMode(2,INPUT_PULLUP);
Serial.begin(9600);
}
void loop() {
int x = analogRead(A0);
int y = analogRead(A1);
int sw = digitalRead(2);
Serial.write(x/4);
Serial.write(y/4);
Serial.write(sw);
delay(20);
}
程式碼:
import processing.serial.*;
Serial myPort;
void setup(){
size(256,256);
myPort = new Serial(this,"COM3",9600);
}
int ballX=0, ballY=0;
void draw(){
background(255);//清畫面
if(myPort.available()>=3){
int x = myPort.read();
int y = myPort.read();
int sw = myPort.read();
ballX = x;
ballY = y;
}
ellipse(ballX,ballY,10,10);
}
