如何添加碰撞檢測

我想製作一個遊戲，其中壞人在飛機上飛行，你必須嘗試躲閃它們。我設法編寫了飛機的控制，以及如何將壞人加入/移動到舞臺上。我想知道如何編碼碰撞檢測，以便如果飛機被壞人擊中，我會被帶到「遊戲結束」屏幕。如何添加碰撞檢測

import flash.utils.Timer; 
import flash.events.TimerEvent; 

var upPressed:Boolean = false; 
var downPressed:Boolean = false; 
var leftPressed:Boolean = false; 
var rightPressed:Boolean = false; 
var baddies:Array = new Array(); 
var baddieSpeed:int = 15; 
var timer: Timer = new Timer(1000); 
timer.addEventListener(TimerEvent.TIMER, addBaddie); 
timer.start(); 

//deg2rad = Math.PI/180; 
//rad2deg = 180/Math.PI; 

plane.addEventListener(Event.ENTER_FRAME, fl_MoveInDirectionOfKey_2); 
stage.addEventListener(KeyboardEvent.KEY_DOWN, fl_SetKeyPressed_2); 
stage.addEventListener(KeyboardEvent.KEY_UP, fl_UnsetKeyPressed_2); 



function fl_MoveInDirectionOfKey_2(event:Event) 
{ 
    if (upPressed) 
    { 
     plane.y -= 8; 
    } 
    if (downPressed) 
    { 
     plane.y += 8; 
    } 
    if (leftPressed) 
    { 
     plane.x -= 8; 
    } 
    if (rightPressed) 
    { 
     plane.x += 8; 
    } 
} 

function fl_SetKeyPressed_2(event:KeyboardEvent):void 
{ 
    switch (event.keyCode) 
    { 
     case Keyboard.UP: 
     { 
      upPressed = true; 
      break; 
     } 
     case Keyboard.DOWN: 
     { 
      downPressed = true; 
      break; 
     } 
     case Keyboard.LEFT: 
     { 
      leftPressed = true; 
      break; 
     } 
     case Keyboard.RIGHT: 
     { 
      rightPressed = true; 
      break; 
     } 
    } 
} 

function fl_UnsetKeyPressed_2(event:KeyboardEvent):void 
{ 
    switch (event.keyCode) 
    { 
     case Keyboard.UP: 
     { 
      upPressed = false; 
      break; 
     } 
     case Keyboard.DOWN: 
     { 
      downPressed = false; 
      break; 
     } 
     case Keyboard.LEFT: 
     { 
      leftPressed = false; 
      break; 
     } 
     case Keyboard.RIGHT: 
     { 
      rightPressed = false; 
      break; 
     } 
    } 
} 

timer.addEventListener(TimerEvent.TIMER, addBaddie); 
timer.start(); 
function addBaddie(evt:TimerEvent):void { 
    var baddie:Baddie = new Baddie(); 
    baddie.x = - baddie.width 
    baddie.y = Math.random() * stage.stageHeight; 
    baddie.angle = getAngle(baddie.x, baddie.y, plane.x, plane.y); 
    baddie.rotation = getAngle(baddie.x, baddie.y, plane.x, plane.y); 
    baddie.speed = baddieSpeed 
    addChild(baddie); 
    baddies.push(baddie); 
    } 

var baddieMover:Timer = new Timer(40); 
baddieMover.addEventListener(TimerEvent.TIMER, moveBaddies); 
baddieMover.start(); 
var counter:int = 0; 
function moveBaddies(evt:TimerEvent):void { 
    for (var i:int = 0; i < baddies.length; i++) { 
     var dx = Math.cos(deg2rad(baddies[i].angle)) * baddies[i].speed; 
     var dy = Math.sin(deg2rad(baddies[i].angle)) * baddies[i].speed; 
     baddies[i].x += dx; 
     baddies[i].y += dy; 
    } 
} 



function deg2rad(deg:Number):Number { 
    return deg * (Math.PI/180); 
} 

function rad2deg(rad:Number):Number { 
    return rad * (180/Math.PI); 
} 



function getAngle(x1:Number, y1:Number, x2:Number, y2:Number):Number { 
    var radians:Number = Math.atan2(y2 - y1, x2 - x1); 
    return rad2deg(radians); 
}

來源

2013-06-06 user2449910

獲取對象的邊界 - 即baddie和plane，然後檢查相交。在僞代碼：

Rectangle rect_1 = plane.getBounds(); 
Rectangle rect_2 = baddie.getBounds(); 

if(rect_1.intersects(rect_2)) 
{ 
    DoSomethingAmazing(); 
}

這裏有一個更詳細的教程：http://zetcode.com/tutorials/javagamestutorial/collision/

來源

2013-06-06 01:24:55

閃光燈有一個內置的叫hitTestObject您可以使用簡單的基於方/邊框衝突的方法。

if(player.hitTestObject(baddies[i])){ 
//kill the player or whatever, go to game over screen, break out of for loop 
}

來源

2013-06-12 17:08:03 bandaro

如何添加碰撞檢測

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