hit3用AS3中的BitmapData進行測試 - 我的播放器沉入平臺

Question

我正在製作一臺平臺遊戲機。以下是我迄今爲止： http://megaswf.com/s/2486396（四處走動，並與arrowkeys跳）

當你從一個跳躍土地，你匯幾像素到地面，並得到推高（我不喜歡這個）。

當你走下山坡時，你會失去與地面的接觸，它看起來很生澀（我不喜歡這樣）。

當你爬上一座小山時，你會很慢地被推到頂部（我特別不喜歡這樣）。

我基本上希望玩家能夠在行走時跟隨山的輪廓（除非山坡太陡峭，我認爲我會在稍後工作）。 關於如何做到這一點的任何想法？

這裏是我的代碼（這只是在時間軸上的那一刻，直到我真正工作，如何做到這一點上有第二階段的影片剪輯 - playerClip和groundClip）：

import flash.geom.Rectangle; 
import flash.display.BitmapData; 
import flash.events.Event; 
import flash.geom.Point; 
import flash.events.KeyboardEvent; 

// Bitmap data stuff 
var groundRect:Rectangle = groundClip.getBounds(this); 
var groundClipBmpData = new BitmapData(groundRect.width,groundRect.height,true,0); 
groundClipBmpData.draw(groundClip); 

var playerRect:Rectangle = playerClip.getBounds(this); 
var playerClipBmpData = new BitmapData(playerRect.width,playerRect.height,true,0); 
playerClipBmpData.draw(playerClip); 


// Player movement variables 
var jump:Boolean = false; 
var grounded:Boolean = false; 

var moveRight:Boolean = false; 
var moveLeft:Boolean = false; 

var xMove = 0; 
var yMove = 0; 

const jumpStrength = 10; 
const xMax = 5; 
const xAccel = 1; 
const GRAVITY = 1; 

addEventListener(Event.ENTER_FRAME, enterFrame); 
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyPress); 
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyRelease); 

function enterFrame(e:Event):void { 
    /*---- PLAYER MOVEMENT ----*/ 
    // Movement Acceleration 
    if (moveLeft == true) { 
     xMove -= xAccel; 
    } else if (moveRight == true) { 
     xMove += xAccel; 
    } else if (xMove > 0) { 
     xMove -= xAccel; 
    } else if (xMove < 0) { 
     xMove += xAccel; 
    } 

    // Maximum Walk Speed 
    if (xMove > xMax) { 
     xMove = xMax; 
    } else if (xMove < -xMax) { 
     xMove = -xMax; 
    } 

    // Jumping 
    if (jump == true) { 
     grounded = false; 
     yMove = -jumpStrength; 
     jump = false; 
    } 

    /*---- BITMAP DATA STUFF ----*/ 
    var playerRect:Rectangle = playerClip.getBounds(this); 
    var playerOffset:Matrix = playerClip.transform.matrix; 

    playerOffset.tx = playerClip.x - playerRect.x; 
    playerOffset.ty = playerClip.y - playerRect.y; 

    var playerClipBmpData = new BitmapData(playerRect.width,playerRect.height,true,0); 
    playerClipBmpData.draw(playerClip, playerOffset); 

    var groundRect:Rectangle = groundClip.getBounds(this); 
    var groundClipBmpData = new BitmapData(groundRect.width,groundRect.height,true,0); 
    var groundOffset:Matrix = groundClip.transform.matrix; 

    groundOffset.tx = groundClip.x - groundRect.x; 
    groundOffset.ty = groundClip.y - groundRect.y; 
    groundClipBmpData.draw(groundClip, groundOffset); 


    // COORDINATES 
    var rLoc:Point = new Point(groundRect.x,groundRect.y); 
    var bLoc:Point = new Point(playerRect.x, playerRect.y); 

    // FUTURE COORDINATE OF THE PLAYER 
    var bLocFuture:Point = new Point(playerRect.x + xMove,playerRect.y + yMove); 

    // HIT TEST GROUND WITH FUTURE COORDINATE OF PLAYER 
    if (groundClipBmpData.hitTest(rLoc, 
    255, 
    playerClipBmpData, 
    bLocFuture, 
    255 
    )) { 
     grounded = true; 
     playerClip.y--; 
     yMove = 0; 
    } else { 
     yMove += GRAVITY; 
    } 

    // MOVE THE PLAYER 
    playerClip.y += yMove; 
    playerClip.x += xMove; 


    // delete useless bitmap data to save memory 
    playerClipBmpData.dispose(); 
    groundClipBmpData.dispose(); 
} 

function onKeyPress(e:KeyboardEvent):void { 
    if (e.keyCode == 37) { 
     moveLeft = true; 
     moveRight = false; 
    } else if (e.keyCode == 39) { 
     moveRight = true; 
     moveLeft = false; 
    } else if (e.keyCode == 38) { 
     if (grounded == true) { 
      jump = true; 
     } 
    } 

} 

function onKeyRelease(e:KeyboardEvent):void { 
    if (e.keyCode == 37) { 
     moveLeft = false; 
    } else if (e.keyCode == 39) { 
     moveRight = false; 
    } 
} 

Answer 1

我想你想改變，使表面上的球員，而不是步行向上浮動，這是什麼代碼：

if (groundClipBmpData.hitTest(rLoc, 
    255, 
    playerClipBmpData, 
    bLocFuture, 
    255 
    )) { 
     grounded = true; 
     playerClip.y--; 
     yMove = 0; 
    } else { 
     yMove += GRAVITY; 
    } 

你想要做的是這樣的：

if(groundClipBmpData.hitTest(rLoc, 255, playerClipBmpData, bLocFuture, 255)) 
{ 
    yMove += GRAVITY; 
} 
else 
{ 
    grounded = true; 
    yMove = 0; 
} 

while(groundClipBmpData.hitTest(rLoc, 255, playerClipBmpData, bLocFuture, 255)) 
{ 
    playerClip.y--; 
} 
playerClip.y++;