这是我的代码：
package {
import players.*;
import physics.Engine;
import flash.display.MovieClip;
public class Mission extends MovieClip {
public function Mission() {
var player1:Player1 = new Player1();
player1.playerWeight = 2;
player1.walkingSpeed = 5;
stage.addEventListener(KeyboardEvent.KEY_DOWN, player1.keyDown);
stage.addEventListener(KeyboardEvent.KEY_UP, player1.keyUp);
Engine.addPlayer(player1);
}
}
}
引擎类：
package physics {
import animation.Player;
import flash.events.Event;
import scene.Mission;
public class Engine {
private static var _players:Array = new Array();
public static function addPlayer(player:*):void{
_players.push(player);
}
public static function update(e:Event):void{
for(var i:String in _players){
_gravity(_players[i]);
}
}
private static function _gravity(player:*):void{
if(solidBelow(player)){
player.jumps = 0;
player.jumping = false;
player.gravity = 0;
} else{
player.gravity += player.playerWeight;
}
if(player.gravity < 0 && player.currentLabel != 'jumping'){
player.gotoAndStop('jumping');
player.jumping = true;
}
if(player.gravity > 5 && player.currentLabel != 'falling' && solidBelow(player) == false){
player.gotoAndStop('falling');
}
if(player.gravity > -10 && player.gravity < 0 && player.jumping == true){
player.jumps++;
player.jumping = false;
}
if(player.currentLabel == 'falling' && solidBelow(player) == true){
player.gotoAndStop('still');
}
if(player.gravity > 100){
player.die();
}
player.y += player.gravity;
}
public static function solidBelow(object:*):Boolean{
for(var i:String in Mission.solidArray){ //contains all the solid blocks
if(Mission.solidArray[i].hitTestPoint(object.x + object.bottomBumpPoint.x, object.y + object.bottomBumpPoint.y, true)){
object.y = Mission.solidArray[i].y;
return true;
}
}
return false;
}
public static function solidLeft(object:*):Boolean{
for(var i:String in Mission.solidArray){
if(
Mission.solidArray[i].hitTestPoint(object.x + object.leftBumpPoint.x, object.y + object.leftBumpPoint.y, true)){
return true;
}
}
return false;
}
public static function solidRight(object:*):Boolean{
for(var i:String in Mission.solidArray){
if(
Mission.solidArray[i].hitTestPoint(object.x + object.rightBumpPoint.x, object.y + object.rightBumpPoint.y, true)){
return true;
}
}
return false;
}
public static function moveLeft(object:*):void{
if(solidBelow(object) == true && object.currentLabel != 'walking'){
object.gotoAndStop('walking');
}
if(!solidLeft(object)){
object.scaleX = object.scaleX > 0 ? object.scaleX * -1 : object.scaleX * 1;
object.x -= object.walkingSpeed;
}
}
public static function moveRight(object:*):void{
if(solidBelow(object) == true && object.currentLabel != 'walking'){
object.gotoAndStop('walking');
}
if(!solidRight(object)){
object.scaleX = object.scaleX < 0 ? object.scaleX * -1 : object.scaleX * 1;
object.x += object.walkingSpeed;
}
}
public static function jump(object:*, jumpHeight:int):void{
object.gotoAndStop('still');
object.gravity = jumpHeight;
object.y--;
}
}
}
玩家类：
package animation {
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.geom.Point;
import physics.Engine;
import flash.Events.Event;
public class Player extends MovieClip{
public var gravity:int = 0;
public var jumping:Boolean = false;
public var jumps:int = 0;
public var walkingSpeed:int = 5;
public var movingLeft:Boolean = false;
public var movingRight:Boolean = false;
public var leftBumpPoint:Point = new Point(-19, -80);
public var rightBumpPoint:Point = new Point(20, -80);
public var topBumpPoint:Point = new Point(0, 170);
public var bottomBumpPoint:Point = new Point(0, 0);
public const DIED:String = 'died';
public function Player() {
}
public function keyDown(e:KeyboardEvent){
var keyCode:int = e.keyCode;
//w = 87
//a = 65
//s = 83
//d = 68
//up = 38
//left = 37
//down = 40
//right = 39
//space = 32
if(keyCode == 37 || keyCode == 65) {
addEventListener(Event.ENTER_FRAME, moveLeft, false, 0, true);
movingLeft = true;
if(movingRight == true){
movingRight = false;
removeEventListener(Event.ENTER_FRAME, moveRight);
}
} //left
if(keyCode == 39 || keyCode == 68) {
addEventListener(Event.ENTER_FRAME, moveRight, false, 0, true);
movingRight = true;
if(movingLeft == true){
movingLeft = false;
removeEventListener(Event.ENTER_FRAME, moveLeft);
}
}//right
if((keyCode == 38 || keyCode == 87 || keyCode == 32) && jumping == false && jumps < 2) {
switch (jumps){
case 0:
var jumpHeight:int = -20;
break;
case 1:
var jumpHeight:int = -25;
break;
}
jump(jumpHeight);
} //up
if(keyCode == 40 || keyCode == 83) { } //down
}
public function keyUp(e:KeyboardEvent){
var keyCode:uint = e.keyCode;
//w = 87
//a = 65
//s = 83
//d = 68
//up = 38
//left = 37
//down = 40
//right = 39
//space = 32
if(keyCode == 37 || keyCode == 65) {
gotoAndStop('still');
removeEventListener(Event.ENTER_FRAME, moveLeft);
} //left
if(keyCode == 39 || keyCode == 68) {
gotoAndStop('still');
removeEventListener(Event.ENTER_FRAME, moveRight);
}//right
if(keyCode == 40 || keyCode == 83) { } //down
}
public function moveLeft(e:Event):void{
Engine.moveLeft(this);
}
public function moveRight(e:Event):void{
Engine.moveRight(this);
}
public function jump(jumpHeight:int):void{
Engine.jump(this, jumpHeight);
}
public function respawn(xPos, yPos){
gravity = 0;
x = xPos;
y = yPos;
}
public function die():void{
var event:Event = new Event(DIED);
dispatchEvent(event);
}
}
}
我从此页面获得了碰撞检测的代码：http://as3gametuts.com/2012/01/08/platformer-3/。但是代码中仍然存在很多错误：例如，如果向左移动而有一个实体对象，但它低于左碰撞点，则会直接通过它。此外，如果您正在高速移动，则可以移动对象。有没有人知道一个正确的教程，甚至更好：任何人都可以给我一些开始的提示吗？
提前致谢
修改 如果有帮助，这里有一个游戏链接：http://host.undeadzone.net/stackoverflow.php
另一个编辑： 这不是基于平铺的游戏！
答案 0 :(得分：1)
嗯，好的，对当前代码的评论很少：
我不喜欢在按键上添加/删除eventlisteners。您已经将moveLeft / moveRight状态存储为bools，因此我只需要一次“移动”即可。检查那些的功能，例如
addEventListener(Event.ENTER_FRAME, move, false, 0, true);
public function move(e:Event):void{
if(moveLeft) Engine.moveLeft(this);
else if(moveRight) Engine.moveRight(this);
}
之后更容易清理......事实上，在你目前的代码中，我并没有看到你在死亡时删除了听众（也许它已经在其他地方完成了，但这正是我和＃39; d避免经常创建事件监听器，它很难跟踪，如果它们没有全部被删除，那么该对象永远不会被垃圾收集）
高速穿过物体的问题称为隧道效应。可能有更好的方法，但我所做的是从旧位置到新位置生成一条线并检查其上的碰撞。当你的碰撞器是简单的矩形时不是太难，但如果它们是不规则的形状，我认为你必须更进一步：创建一个包含字符所经过的所有位置并检查多边形的多边形（玩家路径） - 多边形（障碍物）碰撞。