以下是我的code，
就是运行后单次点击鼠标射击子弹，没问题。
但是连续按就会不断重置或者说使用同一个子弹不断从大炮中射出
有什么办法可以做出可以无限正常射出子弹，连续，
可能表达不是很清楚，前辈们可以直接run这个code，
能帮忙解决的，一定会回报，谢谢
/*
April 24
game
Hawke Jiang
*/
PVector mPos;//position of the mouse
PVector tPos;// the postiion of the turret
PVector pPos;// the positon of the player project
PVector tDir;//the firing direction of the turret, length 1
//PVector vel;
//PVector acc;
//PVector size1;
PVector pVel;//
PVector grav = new PVector(0,1);//gravty
void setup(){
size(600,600);
init();
// vel = PVector.random2D();
// vel.mult(5);
// acc = new PVector (0,1);
// size1 = new PVector(30,30);
}
void init(){
//PVector.initializations
mPos = new PVector();//zerioo until mousex and y exist
tPos = new PVector(width/8,height);//
pPos = new PVector(-1000, -1000);//projectile bank location
tDir = new PVector();//
pVel = new PVector ();
}
void mousePressed(){
//set the bullet position to the turret
pPos.set(tPos);
//set the initial velcit to the turret direction
pVel.set(tDir.div(2));
// vel = PVector.random2D();
// vel.mult(10);
}
void draw(){
//clear the last frame
background(200);
//check ksy so see if is new key input for turret
if (keyPressed){
if (key == 'a'&&tPos.x >9){//only accept the key command if it doesn't move
tPos.x -= 10;
}
else if (key == 'd'&&tPos.x < width - 9){
tPos.x += 10;
}
}
//update
//a***tes the projectile is it not in the bank
if (pPos.x!=-1000){
pVel.add(grav);
pPos.add(pVel);
}
mPos.set(mouseX,mouseY);
tDir = PVector.sub(mPos,tPos);
tDir.normalize();
tDir.mult(50);
//draw
fill(255);
// line(mPos.x, mPos.y,0,0);// line from the origin to the mouse position postion
// ellipse(mPos.x, mPos.y,10,10);
// line(tPos.x, tPos.y,0,0);// line from the origin to the mouse position postion
ellipse(tPos.x, tPos.y,40,40);
strokeWeight(5);
line(tPos.x + tDir.x, tPos.y + tDir.y, tPos.x, tPos.y);
fill(255,0,0);
ellipse(tPos.x + tDir.x, tPos.y + tDir.y,10,10);
//bullet
ellipse(pPos.x,pPos.y,10,10);
}

就是怎么做才能不停开火，就不止一颗子弹