Here's a very simple AS3 project consisting of one class which draws a rectangle. When I run it, the rectangle is clearly larger than 100x100 pixels. After pulling out my hair for a few hours I thought I'd ask: why?
Edit: I know that it isn't correct because, though I have my screen resolution set to 1280x800, if I set the width to 500 it takes up almost all of my screen.
package
{
import flash.display.Sprite;
import flash.events.Event;
public class Draw extends Sprite
{
private var screen:Sprite;
public function Draw():void
{
this.addEventListener(Event.ADDED_TO_STAGE, stageHandler);
}
private function stageHandler(e:Event):void{
screen = new Sprite();
screen.graphics.clear();
screen.graphics.beginFill(0x333333,.9);
screen.graphics.drawRect(0,0,100, 100);
screen.graphics.endFill();
addChild(screen);
trace(stage.width + "," + stage.height);
}
}
}
:
Somehow your scalemode settigns for your flash player are set in a strange mode from FlashBuilder.
Try setting
stage.scaleMode = StageScaleMode.NO_SCALE;
in your stageHandler function. You code has no errors. The problem is in your publish preview settings somewhere.
Related
I have created a MOUSE_MOVE MouseEvent and a code to draw circles while I move the mouse cursor. The problem is, it doesn't draw out every single circle if I move the mouse too fast.
Here are the codes I have for the MOUSE_MOVE event.
stage.addEventListener(MouseEvent.MOUSE_MOVE, mCursor);
public function mCursor(e:MouseEvent):void
{
var cursor:Shape = new Shape();
cursor.graphics.beginFill(1, 1);
cursor.graphics.drawCircle(e.stageX, e.stageY, 10);
cursor.graphics.endFill();
addChild(cursor);
}
Would there be an arithmetic equation or physics formula to have it add every single circle such that it can draw a straight line without the blanks in between?
Just use
cursor.graphics.lineTo(…);
To draw a continuous line between points instead of adding discrete individual circles.
I erased the above codes and just added this one line of code cursor.graphics.lineTo(e.localX, e.localY); I tested it and there were blanks in between
You have to set the line width first by calling lineStyle() method of the graphics object. Otherwise the line width is zero (its default value).
Here's a full working document class:
package
{
import flash.display.Sprite;
import flash.display.Shape;
import flash.events.MouseEvent;
public class Main extends Sprite
{
private var cursor:Shape;
public function Main()
{
cursor = new Shape();
cursor.graphics.lineStyle(2);
addChild(cursor);
stage.addEventListener(MouseEvent.MOUSE_MOVE, mCursor);
}
private function mCursor(e:MouseEvent):void
{
cursor.graphics.lineTo(e.stageX, e.stageY);
}
}
}
You likely have to fiddle around with moveTo in order to set an appropriate starting position. As the code is now, it starts at 0/0.
I am making a TDS in Flash CS4 using AS3 but there seems to be a problem. It's hard to explain so I'm gonna link the flash file. Click this.
This is the first time uploading a file for sharing so for those who can't or are unable to download the file, this is what happens:
Player has mouse rotation that is, Player looks at where the mouse is. On Mouse down I've put the script for creating bullets. The bullets are being created alright. But when the bullets move that's when the problem arises. Say that at position and rotation X, I shot 5 bullets and they are moving in X direction. Now if I shoot a bullet in Y position and rotation, the bullet that was created there goes in Y direction but so do all the other bullets that were created in the X position and direction. They change their course.
Here is the code for the game.
package {
import flash.display.MovieClip;
import flash.display.Stage;
import flash.events.MouseEvent;
import flash.ui.Keyboard;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.ui.Mouse;
import flash.events.TimerEvent;
public class Main extends MovieClip {
var player : Player = new Player();
//Customizable Weapon Settings
var bulletNumber:Number;//number of bullets per shot
var bulletOffset:Number;//bigger number = less acurate
var bulletSpeed:Number;//pixels per frame
var bulletMaxAge:Number;//1000 = 1 second
var reloadSpeed:Number;//1000 = 1 second
var randomNum:Number;
public static var xSpeed:Number;
public static var ySpeed:Number;
var bulletAngle:Number;
var timer:Number=0;
var flag:Boolean;
//other variables (do not edit)
var mouseClicked:Boolean=false;
var radians:Number=Math.PI/180;
public function Main() {
player.x=stage.stageWidth/2;
player.y=stage.stageHeight/2;
stage.addChild(player);
player.gotoAndStop(5);
loadWeapon("Machine Gun");
addEventListener(Event.ENTER_FRAME,on_enter_frame);
stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDownHandler);
stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUpHandler);
}
public function onMouseDownHandler(event:MouseEvent) {
//trace("Mouse Down");
mouseClicked=true;
flag=true;
}
public function onMouseUpHandler(event:MouseEvent) {
//trace("Mouse Up");
mouseClicked=false;
flag=false;
timer=0;
}
public function loadWeapon(weaponType:String) {
switch (weaponType) {
case "Machine Gun" :
//bulletNumber = 100;
bulletOffset=10;
bulletSpeed=10;
bulletMaxAge=1000;
break;
}
}
function on_enter_frame(e:Event) {
trace("Click: "+ mouseClicked);
fireWeapon();
}
function fireWeapon() {
//check if mouse is clicked
//if true, create bullet
if (mouseClicked) {
createBullet();
player.gotoAndStop(10);
} else {
player.gotoAndStop(1);
}
}
public function createBullet() {
var bullet : Bullet2= new Bullet2();
bullet.x=player.x;
bullet.y=player.y;
if (flag) {
timer++;
if (timer==10) {
trace("lol");
//calculate random bullet offset.
randomNum = Math.random() * (bulletOffset);
//set bullet firing angle
bulletAngle = (player.rotation + randomNum) * radians;
//set bullet speed based on angle
xSpeed=Math.cos(bulletAngle)*bulletSpeed;
ySpeed=Math.sin(bulletAngle)*bulletSpeed;
//trace (bulletAngle);
stage.addChild(bullet);
bullet.addEventListener(Event.ENTER_FRAME, runForest);
//mouseClicked = false;
timer=0;
}
}
function runForest(e:Event) {
bullet.x+=xSpeed;
bullet.y+=ySpeed;
}
}
}
}
Things that I've tried:
1) I put the "runForest()" funtion outside of "createbullet()" function which give me a "1120: Access of undefined property bullet." Error. (Which doesn't make sense since I am giving it a enter frame event listener.)
2) For solving this, I made the bullet variable global and declared it inside the "createbullet()" function like this- "var bullet : Bullet2;" And inside createbullet()- "bullet = new Bullet2();" That gives me a completely different output.
3) I put the "runForest()" function in its own class file. But the same thing is happening.
I was referring to a Tutorial that used AS2. This is the link.
Help me solve this please.
Thanks!
Review this code:
//set bullet speed based on angle
xSpeed=Math.cos(bulletAngle)*bulletSpeed;
ySpeed=Math.sin(bulletAngle)*bulletSpeed;
then take a look at how these variables for speed are created:
public static var xSpeed:Number;
public static var ySpeed:Number;
You have 1 variable for the x direction of the speed. If there is only one variable, there can only be 1 value for speed.
that's why all your bullets are moving in the same direction, because they all share that one single value for speed, which causes them to go into the same direction.
Your Main class is doing everything at the moment and you should really refactor some of that code into several other classes.
Even your own understanding of the code you are writing is not reflected by the code, your comment says:
//set bullet speed based on angle
Now why is that bullet speed a variable of Main? Object oriented programming is made exactly for that. You can literally turn your plain English description of the desired behaviour into code.
When you say that you "want to have Bullets", then create a Bullet class.
When you say "each Bullet object should have its own speed", then add a property to that class that is the speed.
You will encounter the same problem with your weapons and the same solution applies.
I am beginner of as3. I am trying to keep object size and position static while the stage size changing. I want my objects size and position same in any condition of the stage. the stage can be full screen, can be resized by user, can be resized by device. i have added a ball on my screen and when i click the ball screen goes full screen. but in full screen mode my ball change its position and size. it gets bigger. how to keep the ball on the top left corner of the stage.
see the following screenshots and my code.
AS3 Code
package {
import flash.display.MovieClip;
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.display.*;
import flash.geom.Rectangle;
public class mainajaira extends MovieClip {
private var _ball=new ball();
private var stagewidht:Number=stage.stageWidth;
public function mainajaira() {
// constructor code
addChild(_ball);
_ball.x=0;
_ball.y=0;
trace(_ball.height + "." + "." + _ball.width);
trace("Stage Width:" + stagewidht);
trace("Ball x: " + _ball.x);
_ball.addEventListener(MouseEvent.CLICK, fullscreen)
}
private function fullscreen(e:MouseEvent):void{
if(stage.displayState==StageDisplayState.NORMAL){
stage.displayState=StageDisplayState.FULL_SCREEN}
else if (stage.displayState==StageDisplayState.FULL_SCREEN){
stage.displayState=StageDisplayState.NORMAL}
}
}
}
By default the stage will scale content (so your object dimensions are the same) instead of "expanding" to have extra area. You can adjust this with StageScaleMode. Your description sounds like you want NO_SCALE.
Typically:
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
I'm attempting to draw a text box on the screen. If I assign width and height to any value, as in the code below, I don't see anything drawn. Why is this? What is the use of width and height? Adobe's docs say it's the width/height of the sprite in pixels. Why would that occlude or prevent the drawing of a textbox or another box? I assumed the width/height would set the area that this sprite could be drawn upon, but based on this, I'm probably wrong.
Thanks in advance.
-Nick
package
{
import flash.display.Sprite;
import flash.events.Event;
import mx.core.* ;
import mx.collections.* ;
import flash.display.* ;
import flash.text.* ;
[SWF(width=1000,height=500)]
public class BareBones extends Sprite
{
public var backBuffer:BitmapData;
public var clearColor:uint = 0xFF0043AB;
public var display_txt:TextField;
public var i:uint = 0
public function BareBones()
{
addEventListener(Event.ENTER_FRAME, step);
width = 1000;
height = 500;
display_txt = new TextField();
display_txt.text = "Hello World!";
addChild(display_txt);
}
private function step(event:Event) : void
{
i++;
display_txt.text = i.toString();
}
}
}
When you set width and height in the constructor, you're actually affecting the scaleX and scaleY variables, which in turn affect root's transform.matrix.
In order to know how to set scaleX, Flash works off the content that is inside the clip. For example if you have a MovieClip with a 100x100 box in it, and you set width = 200, Flash will calculate that you mean scaleX = 2.
However you are setting width and height on a clip with nothing in it. The consequence is that scaleX and scaleY are both being set to 0.
I've come across an undesirable effect of using JointStyle.MITER when clearing/redrawing graphics.
My project involves managing custom line graphics with both round and sharp edges, which is why I would like to use a miter joint style.
When the line thickness is greatly increased, even the round areas of the line are affected by the miter style. While I find this unfortunate, it's understandable and not the bug I'm referring to. the bug(?) occurs when decreasing the line thickness doesn't completely clear the graphics, as instructed to do so by the code each time the thickness changes, leaving artifacts of the line graphics where the line once was. Artifacts are also left by sharp edges, not just rounded corners.
I'm using Flash Player version 10.1.53.64 on Mac OS X Snow Leopard (10.6.4).
You can test this by running my sample code below. use the left and right keyboard arrows change the thickness of the stroke of a round rect.
Update: The graphics artifacts are superficial. Dragging the shape over their location after they appear will remove them. Code updated with dragging functionality.
package
{
import flash.display.CapsStyle;
import flash.display.JointStyle;
import flash.display.LineScaleMode;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.events.MouseEvent;
import flash.ui.Keyboard;
public class StrokeWidth extends Sprite
{
private var roundRect:Sprite = new Sprite();
private var strokeThickness:Number = 6;
public function StrokeWidth()
{
addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(evt:Event):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownEventListener);
roundRect.addEventListener(MouseEvent.MOUSE_DOWN, mouseEventListener);
roundRect.addEventListener(MouseEvent.MOUSE_UP, mouseEventListener);
drawRoundRect();
roundRect.x = roundRect.y = 100;
addChild(roundRect);
}
private function drawRoundRect():void
{
roundRect.graphics.clear();
roundRect.graphics.lineStyle(strokeThickness, 0x000000, 1.0, true, LineScaleMode.NONE, CapsStyle.NONE, JointStyle.MITER);
roundRect.graphics.beginFill(0xFF0000);
roundRect.graphics.drawRoundRect(0, 0, 400, 200, 100);
}
private function mouseEventListener(evt:MouseEvent):void
{
switch (evt.type)
{
case MouseEvent.MOUSE_DOWN: roundRect.startDrag(); break;
case MouseEvent.MOUSE_UP: roundRect.stopDrag();
}
}
private function keyDownEventListener(evt:KeyboardEvent):void
{
switch (evt.keyCode)
{
case Keyboard.LEFT: strokeThickness -= 1; break;
case Keyboard.RIGHT: strokeThickness += 1;
}
drawRoundRect();
}
}
}
interesting. the problem was caused because the lineStyle's scale mode was set to none:
LineScaleMode.NONE
changing it to normal fixes the problem:
LineScaleMode.NORMAL
what about re-creating the shape?