[耍廢]WEEK10

用 processing寫 android app

1. 將 processing 右上角的 java改成app mode
(要下載 android模式)
自動安裝 Android SDK NDK)
可以與手機互動

2.

2.偵測碰撞遊戲:

void setup(){

size(500,500);

}

float ballX=250,ballY=450, ballVX=1, ballVY=10;

float ball2X=250, ball2Y=50;

void draw(){

if(ballX>450||ballX<50) //牆壁

    ballVX=-ballVX;

if(ballY>450 || ballY<50) //牆壁

    ballVY=-ballVY;

if( dist(ballX, ballY, ball2X, ball2Y)<100 ){

float cx=(ballX+ball2X)/2, cy=(ballY+ball2Y)/2;

float nx=ballX-ball2X, ny=ballY-ball2Y;

PVector N=new PVector(nx,ny);

N.normalize();

PVector v0=new PVector(ballVX, ballVY);

float len= -N.dot(v0);

v0.add(N.mult(len*2));

ellipse(cx, cy, 10,10);

stroke(0); line(ballX, ballY, ball2X, ball2Y);

stroke(255,128,0); line(cx,cy, cx+5*ballVX, cy+5*ballVY);

stroke(255,128,0); line(cx,cy, cx+5*v0.x, cy+5*v0.y);

stroke(255,0,0); line(cx,cy, cx+N.x, cy+N.y);

//return;

ballVX=v0.x; ballVY=v0.y;

}

background(255);

ballX+=ballVX; ballY+=ballVY;

ellipse(ballX, ballY, 100,100);

ellipse(ball2X, ball2Y, 100,100);

}