以 Gary Rosenzweig 的游戏为基础制作基于动作脚本 3 的基于触摸的平台游戏，直到今天一切顺利，我一直在尝试在不更改大部分动作脚本的情况下换掉地板对象等，我有以下错误.
ArgumentError：错误 #2109：在场景跳转中找不到帧标签跳转。在 flash.display::MovieClip/gotoAndStop() 在 PlatformGame/moveCharacter()[C:\Users\Michael\Desktop\platformGame\PlatformGame.as:418] 在 PlatformGame/moveEnemies()[C:\Users\Michael\Desktop \platformGame\PlatformGame.as:314] 在 PlatformGame/gameLoop()[C:\Users\Michael\Desktop\platformGame\PlatformGame.as:303]
这似乎也会导致碰撞检测问题。
代码如下。（不是我没有更改原始场景或标签名称，但它仍然显示错误）。
package {
import flash.display.*;
import flash.events.*;
import flash.text.*;
import flash.utils.getTimer;
import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;
public class PlatformGame extends MovieClip {
// movement constants
static const gravity:Number = .004;
// screen constants
static const edgeDistance:Number = 100;
public var rightButton:SimpleButton;
// object arrays
private var fixedObjects:Array;
private var otherObjects:Array;
// hero and enemies
private var hero:Object;
private var enemies:Array;
// game state
private var playerObjects:Array;
private var gameScore:int;
private var gameMode:String = "start";
private var playerLives:int;
private var lastTime:Number = 0;
// start game
public function startPlatformGame() {
playerObjects = new Array();
gameScore = 0;
gameMode = "play";
playerLives = 3;
}
// start level
public function startGameLevel() {
// create characters
createHero();
addEnemies();
// examine level and note all objects
examineLevel();
// add listeners
this.addEventListener(Event.ENTER_FRAME,gameLoop);
Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
gamelevel["rButton"].addEventListener(TouchEvent.TOUCH_BEGIN,touchRight);
gamelevel["rButton"].addEventListener(TouchEvent.TOUCH_END,touchRightReleased);
gamelevel["lButton"].addEventListener(TouchEvent.TOUCH_BEGIN,touchLeft);
gamelevel["lButton"].addEventListener(TouchEvent.TOUCH_END,touchLeftReleased);
gamelevel["jButton"].addEventListener(TouchEvent.TOUCH_BEGIN,jump);
gamelevel["jButton"].addEventListener(TouchEvent.TOUCH_END,jumpReleased);
trace("hi"+gamelevel["rButton"]);
// set game state
gameMode = "play";
addScore(0);
showLives();
}
// start level
public function startGameLevelHarder() {
// create characters
createHero();
addHardEnemies();
// examine level and note all objects
examineLevel();
// set game state
gameMode = "play";
addScore(0);
showLives();
}
// start level
public function startGameLevelHardest() {
// create characters
createHero();
addHardestEnemies();
// examine level and note all objects
examineLevel();
// set game state
gameMode = "play";
addScore(0);
showLives();
}
// creates the hero object and sets all properties
public function createHero() {
hero = new Object();
hero.mc = gamelevel.hero;
hero.dx = 0.0;
hero.dy = 0.0;
hero.inAir = false;
hero.direction = 0;
hero.animstate = "stand";
hero.walkAnimation = new Array(2,3,4,5,6,7,8);
hero.animstep = 0;
hero.jump = false;
hero.moveLeft = false;
hero.moveRight = false;
hero.jumpSpeed = .8;
hero.walkSpeed = .15;
hero.width = 15.0;
hero.height = 35.0;
hero.startx = hero.mc.x;
hero.starty = hero.mc.y;
}
// finds all enemies in the level and creates an object for each
public function addEnemies() {
enemies = new Array();
var i:int = 1;
while (true) {
if (gamelevel["enemy"+i] == null) break;
var enemy = new Object();
enemy.mc = gamelevel["enemy"+i];
enemy.dx = 0.0;
enemy.dy = 0.0;
enemy.inAir = false;
enemy.direction = 1;
enemy.animstate = "stand"
enemy.walkAnimation = new Array(2,3,4,5);
enemy.animstep = 0;
enemy.jump = false;
enemy.moveRight = true;
enemy.moveLeft = false;
enemy.jumpSpeed = 1.0;
enemy.walkSpeed = .08;
enemy.width = 30.0;
enemy.height = 30.0;
enemies.push(enemy);
i++;
}
}
// finds all enemies in the level and creates an object for each
public function addHardEnemies() {
enemies = new Array();
var i:int = 1;
while (true) {
if (gamelevel["enemy"+i] == null) break;
var enemy = new Object();
enemy.mc = gamelevel["enemy"+i];
enemy.dx = 0.0;
enemy.dy = 0.0;
enemy.inAir = false;
enemy.direction = 1;
enemy.animstate = "stand"
enemy.walkAnimation = new Array(2,3,4,5);
enemy.animstep = 0;
enemy.jump = false;
enemy.moveRight = true;
enemy.moveLeft = false;
enemy.jumpSpeed = 1.0;
enemy.walkSpeed = .15;
enemy.width = 56.0;
enemy.height = 80.0;
enemies.push(enemy);
i++;
}
}
// finds all enemies in the level and creates an object for each
public function addHardestEnemies() {
enemies = new Array();
var i:int = 1;
while (true) {
if (gamelevel["enemy"+i] == null) break;
var enemy = new Object();
enemy.mc = gamelevel["enemy"+i];
enemy.dx = 0.0;
enemy.dy = 0.0;
enemy.inAir = false;
enemy.direction = 1;
enemy.animstate = "stand"
enemy.walkAnimation = new Array(2,3,4,5);
enemy.animstep = 0;
enemy.jump = false;
enemy.moveRight = true;
enemy.moveLeft = false;
enemy.jumpSpeed = 1.0;
enemy.walkSpeed = .25;
enemy.width = 40.0;
enemy.height = 40.0;
enemies.push(enemy);
i++;
}
}
// look at all level children and note walls, floors and items
public function examineLevel() {
fixedObjects = new Array();
otherObjects = new Array();
for(var i:int=0;i<this.gamelevel.numChildren;i++) {
var mc = this.gamelevel.getChildAt(i);
// add floors and walls to fixedObjects
if ((mc is Floor) || (mc is Wall) || (mc is ground1) || (mc is wall1) || (mc is ledge1) || (mc is ledge2) || (mc is rock) ||(mc is rocktip)) {
var floorObject:Object = new Object();
floorObject.mc = mc;
floorObject.leftside = mc.x;
floorObject.rightside = mc.x+mc.width;
floorObject.topside = mc.y;
floorObject.bottomside = mc.y+mc.height;
fixedObjects.push(floorObject);
// add treasure, key and door to otherOjects
} else if ((mc is Treasure) || (mc is Key) || (mc is Door) || (mc is Chest)) {
otherObjects.push(mc);
}
}
}
// note key presses, set hero properties
public function touchRight(event:TouchEvent) {
trace("touchRight");
hero.moveRight = true;
}
public function touchRightReleased(event:TouchEvent) {
hero.moveRight = false;
}
public function touchLeft(event:TouchEvent) {
hero.moveLeft = true;
}
public function touchLeftReleased(event:TouchEvent) {
hero.moveLeft = false;
}
public function jump(event:TouchEvent) {
if (!hero.inAir) {
hero.jump = true;
}
}
public function jumpReleased(event:TouchEvent) {
if (!hero.inAir) {
hero.jump = false;
}
}
// note key presses, set hero properties
//public function keyDownFunction(event:KeyboardEvent) {
//if (gameMode != "play") return; // don't move until in play mode
//if (event.keyCode == 37) {
//hero.moveLeft = true;
//} else if (event.keyCode == 39) {
//hero.moveRight = true;
//} else if (event.keyCode == 32) {
//if (!hero.inAir) {
//hero.jump = true;
//}
//}
//}
//public function keyUpFunction(event:KeyboardEvent) {
//if (event.keyCode == 37) {
//hero.moveLeft = false;
//} else if (event.keyCode == 39) {
//hero.moveRight = false;
//}
//}
// perform all game tasks
public function gameLoop(event:Event) {
// get time differentce
if (lastTime == 0) lastTime = getTimer();
var timeDiff:int = getTimer()-lastTime;
lastTime += timeDiff;
// only perform tasks if in play mode
if (gameMode == "play") {
moveCharacter(hero,timeDiff);
moveEnemies(timeDiff);
checkCollisions();
scrollWithHero();
}
}
// loop through all enemies and move them
public function moveEnemies(timeDiff:int) {
for(var i:int=0;i<enemies.length;i++) {
// move
moveCharacter(enemies[i],timeDiff);
// if hit a wall, turn around
if (enemies[i].hitWallRight) {
enemies[i].moveLeft = true;
enemies[i].moveRight = false;
} else if (enemies[i].hitWallLeft) {
enemies[i].moveLeft = false;
enemies[i].moveRight = true;
}
}
}
// primary function for character movement
public function moveCharacter(char:Object,timeDiff:Number) {
if (timeDiff < 1) return;
// assume character pulled down by gravity
var verticalChange:Number = char.dy*timeDiff + timeDiff*gravity;
if (verticalChange > 15.0) verticalChange = 15.0;
char.dy += timeDiff*gravity;
// react to changes from key presses
var horizontalChange = 0;
var newAnimState:String = "stand";
var newDirection:int = char.direction;
if (char.moveLeft) {
// walk left
horizontalChange = -char.walkSpeed*timeDiff;
newAnimState = "walk";
newDirection = -1;
} else if (char.moveRight) {
// walk right
horizontalChange = char.walkSpeed*timeDiff;
newAnimState = "walk";
newDirection = 1;
}
if (char.jump) {
// start jump
char.jump = false;
char.dy = -char.jumpSpeed;
verticalChange = -char.jumpSpeed;
newAnimState = "jump";
}
// assume no wall hit, and hanging in air
char.hitWallRight = false;
char.hitWallLeft = false;
char.inAir = true;
// find new vertical position
var newY:Number = char.mc.y + verticalChange;
// loop through all fixed objects to see if character has landed
for(var i:int=0;i<fixedObjects.length;i++) {
if ((char.mc.x+char.width/2 > fixedObjects[i].leftside) && (char.mc.x-char.width/2 < fixedObjects[i].rightside)) {
if ((char.mc.y <= fixedObjects[i].topside) && (newY > fixedObjects[i].topside)) {
newY = fixedObjects[i].topside;
char.dy = 0;
char.inAir = false;
break;
}
}
}
// find new horizontal position
var newX:Number = char.mc.x + horizontalChange;
// loop through all objects to see if character has bumped into a wall
for(i=0;i<fixedObjects.length;i++) {
if ((newY > fixedObjects[i].topside) && (newY-char.height < fixedObjects[i].bottomside)) {
if ((char.mc.x-char.width/2 >= fixedObjects[i].rightside) && (newX-char.width/2 <= fixedObjects[i].rightside)) {
newX = fixedObjects[i].rightside+char.width/2;
char.hitWallLeft = true;
break;
}
if ((char.mc.x+char.width/2 <= fixedObjects[i].leftside) && (newX+char.width/2 >= fixedObjects[i].leftside)) {
newX = fixedObjects[i].leftside-char.width/2;
char.hitWallRight = true;
break;
}
}
}
// set position of character
char.mc.x = newX;
char.mc.y = newY;
// set animation state
if (char.inAir) {
newAnimState = "";
}
char.animstate = newAnimState;
// move along walk cycle
if (char.animstate == "walk") {
char.animstep += timeDiff/60;
if (char.animstep > char.walkAnimation.length) {
char.animstep = 0;
}
char.mc.gotoAndStop(char.walkAnimation[Math.floor(char.animstep)]);
// not walking, show stand or jump state
} else {
char.mc.gotoAndStop(char.animstate);
}
// changed directions
if (newDirection != char.direction) {
char.direction = newDirection;
char.mc.scaleX = char.direction*1.35;
}
}
// scroll to the right or left if needed
public function scrollWithHero() {
var stagePosition:Number = gamelevel.x+hero.mc.x;
var rightEdge:Number = stage.stageWidth-edgeDistance;
var leftEdge:Number = edgeDistance;
if (stagePosition > rightEdge) {
gamelevel.x -= (stagePosition-rightEdge);
gamelevel["rButton"].x += (stagePosition-rightEdge);
gamelevel["lButton"].x += (stagePosition-rightEdge);
gamelevel["jButton"].x += (stagePosition-rightEdge);
if (gamelevel.x < -(gamelevel.width-stage.stageWidth)) gamelevel.x = -(gamelevel.width-stage.stageWidth);
}
if (stagePosition < leftEdge) {
gamelevel.x += (leftEdge-stagePosition);
gamelevel["rButton"].x -= (leftEdge-stagePosition);
gamelevel["lButton"].x -= (leftEdge-stagePosition);
gamelevel["jButton"].x -= (leftEdge-stagePosition);
if (gamelevel.x > 0) gamelevel.x = 0;
}
}
// check collisions with enemies, items
public function checkCollisions() {
// enemies
for(var i:int=enemies.length-1;i>=0;i--) {
if (hero.mc.hitTestObject(enemies[i].mc)) {
// is the hero jumping down onto the enemy?
if (hero.inAir && (hero.dy > 0)) {
enemyDie(i);
} else {
heroDie();
}
}
}
// items
for(i=otherObjects.length-1;i>=0;i--) {
if (hero.mc.hitTestObject(otherObjects[i])) {
getObject(i);
}
}
}
// remove enemy
public function enemyDie(enemyNum:int) {
var pb:PointBurst = new PointBurst(gamelevel,"Got Em!",enemies[enemyNum].mc.x,enemies[enemyNum].mc.y-20);
gamelevel.removeChild(enemies[enemyNum].mc);
enemies.splice(enemyNum,1);
}
// enemy got player
public function heroDie() {
// show dialog box
var dialog:Dialog = new Dialog();
dialog.x = 175;
dialog.y = 100;
addChild(dialog);
if (playerLives == 0) {
gameMode = "gameover";
dialog.message.text = "Game Over!";
} else {
gameMode = "dead";
dialog.message.text = "He Got You!";
playerLives--;
}
hero.mc.gotoAndPlay("die");
}
// player collides with objects
public function getObject(objectNum:int) {
// award points for treasure
if (otherObjects[objectNum] is Treasure) {
var pb:PointBurst = new PointBurst(gamelevel,100,otherObjects[objectNum].x,otherObjects[objectNum].y);
gamelevel.removeChild(otherObjects[objectNum]);
otherObjects.splice(objectNum,1);
addScore(100);
// got the key, add to inventory
} else if (otherObjects[objectNum] is Key) {
pb = new PointBurst(gamelevel,"Got Key!" ,otherObjects[objectNum].x,otherObjects[objectNum].y);
playerObjects.push("Key");
gamelevel.removeChild(otherObjects[objectNum]);
otherObjects.splice(objectNum,1);
// hit the door, end level if hero has the key
} else if (otherObjects[objectNum] is Door) {
if (playerObjects.indexOf("Key") == -1) return;
if (otherObjects[objectNum].currentFrame == 1) {
otherObjects[objectNum].gotoAndPlay("open");
levelComplete();
}
// got the chest, game won
} else if (otherObjects[objectNum] is Chest) {
otherObjects[objectNum].gotoAndStop("open");
gameComplete();
}
}
// add points to score
public function addScore(numPoints:int) {
gameScore += numPoints;
scoreDisplay.text = String(gameScore);
}
// update player lives
public function showLives() {
livesDisplay.text = String(playerLives);
}
// level over, bring up dialog
public function levelComplete() {
gameMode = "done";
var dialog:Dialog = new Dialog();
dialog.x = 175;
dialog.y = 100;
addChild(dialog);
dialog.message.text = "Level Complete!";
}
// game over, bring up dialog
public function gameComplete() {
gameMode = "gameover";
var dialog:Dialog = new Dialog();
dialog.x = 175;
dialog.y = 100;
addChild(dialog);
dialog.message.text = "You Got the Treasure!";
}
// dialog button clicked
public function clickDialogButton(event:MouseEvent) {
removeChild(MovieClip(event.currentTarget.parent));
// new life, restart, or go to next level
if (gameMode == "dead") {
// reset hero
showLives();
hero.mc.x = hero.startx;
hero.mc.y = hero.starty;
gameMode = "play";
} else if (gameMode == "gameover") {
cleanUp();
gotoAndStop("start");
} else if (gameMode == "done") {
cleanUp();
nextFrame();
}
// give stage back the keyboard focus
stage.focus = stage;
}
// clean up game
public function cleanUp() {
removeChild(gamelevel);
this.removeEventListener(Event.ENTER_FRAME,gameLoop);
}
}
}