Porting from as3 to haxeflixel

aschab

I wanna port this to haxeflixel:

http://blog.oaxoa.com/2009/07/27/actionscript-3-as3-lightning-thunderbolt-electric-discharge-class/

Does someone know if I will have trouble with the filters? will they work in android/iOs?
any general tips of what to do or not to do?

aschab

@aschab
Following my idea I did the following code:

package;

import flash.filters.GlowFilter;
import flixel.tweens.FlxTween;
import flixel.graphics.frames.FlxFilterFrames;
import flash.filters.BitmapFilter;

import flixel.FlxG;
import flixel.FlxSprite;
import flixel.util.FlxColor;
import flixel.math.FlxPoint;
using flixel.util.FlxSpriteUtil;

class Shield extends FlxSprite
{
private var spr2Filter:FlxFilterFrames;
private var tween2: FlxTween;

public function new() 
{
	trace('Shield created');
	super();
	
	makeGraphic(FlxG.width, FlxG.height, FlxColor.TRANSPARENT);
	drawLine(30, 200, 300, 200, { thickness: 2, color: FlxColor.WHITE } );
	
	var glowFilter = new GlowFilter(0x000000, 1, 10, 10, 3, 1);
	spr2Filter = createFilterFrames(this, glowFilter);
	tween2 = FlxTween.tween(glowFilter, { blurX: 10, blurY: 10 }, 1, { type: FlxTween.PINGPONG });
	tween2.active = true;
}

override public function update(elapsed:Float):Void
{
	updateFilter(this, spr2Filter);
	super.update(elapsed);
}

function createFilterFrames(sprite:FlxSprite, filter:BitmapFilter)
{
	var filterFrames = FlxFilterFrames.fromFrames(
		sprite.frames, 50, 50, [filter]);
	updateFilter(sprite, filterFrames);
	return filterFrames;
}

function updateFilter(spr:FlxSprite, sprFilter:FlxFilterFrames)
{
	sprFilter.applyToSprite(spr, false, true);
}

}
inspired on http://haxeflixel.com/demos/FlxSpriteFilters/

Now my problem is in update when I run updateFilter(this, spr2Filter); all updates seem to stop. What am I missing? what im doing wrong?

dean

@aschab

I'm new to HaxeFlixel, and Flixel for that matter, but I always specify the functions return type. This may not be the reason for your problem though.

function createFilterFrames(sprite:FlxSprite, filter:BitmapFilter):FlxFilterFrames
{
	var filterFrames = FlxFilterFrames.fromFrames(
		sprite.frames, 50, 50, [filter]);
	updateFilter(sprite, filterFrames);
	return filterFrames;
}

function updateFilter(spr:FlxSprite, sprFilter:FlxFilterFrames):Void
{
	sprFilter.applyToSprite(spr, false, true);
}

I checked out that effect. It's really cool. Good luck!

aschab

Nice catch, actually that code is mostly copied from the demos, they had it like that. But didnt solve it.

So far I can say that I'm doing something wrong on the filter, or maybe you can't put filters on drawed stuff (can someone confirm this)

I did a simple update with:
fill(FlxColor.TRANSPARENT);
drawLine(30, cy++, 300, 200, { thickness: 2, color: FlxColor.WHITE } );
Works like a charm, I get a moving line.

BUT when I activate the filter, nromal, without any updates, the line never updates and all animations stop. So something is broken in the update of my filtered sprite.

I only want to achieve an animated glowing of a drawed line (animated or static, doesnt matter). If anyone can point me in the right direction would be appreciated