Hero stops on hitTest

[brad_sk88]

http://www.saskgmperformance.org/Brad/HMPort.fla
http://www.saskgmperformance.org/Brad/HMPort.swf

I'm trying to make a port of an old game, but I haven't used flash in a long time.

So if you run the .swf and walk onto a weed or rock you'll see the problem I'm having. I have the code set up so that if there is no hitTest the character will respond to the keyboard.

But, when there is a hitTest he gets stuck. I've tried making him go in the opposite direction until the hitTest returns false, but this turns out sloppy and buggy.

I have to test for multiple, duplicated movie clips, so I'm having trouble finding a method that will work for me.

Yes I searched
Thanks in advance.

[mr_malee]

perform the hitTest after you have updated your position with velocity, then render new position when all calculations have finished

if(key.isDown(Key.RIGHT)) x += speed
if(Key.isDown(Key.LEFT)) x -= speed

if(_root.bounds.hitTest(x, y, true)) //do hit

_x = x
_y = y

[brad_sk88]

Okay, so now I have

for(i = 0; i <= 200; i++){
	if(!this.hitBox.hitTest(_root["obstacle"+i].hitBox)){
		this._x = x;
		this._y = y;
	}
}

other stuff

if(Key.isDown(Key.UP)){
		if(Key.isDown(Key.SHIFT)){ //Player runs when shift is held with controls
			this.gotoAndStop("RunN");
			y -= 6;
		}else{
			this.gotoAndStop("WalkN");
			y -= 2;
		}
}

^^repeated for each keystroke

But now the hero doesn't move at all.

[MikeMD]

You probably need a switch, otherwise it continually does the action uncer hittest, so it keeps sending and resending your hero to a given frame. Should have and hit!= 1 when testing for hit, and then switch hit = 1 after he's hit and sent to a frame you need to send it to. Then just reset this to 0 or whatever as needed ( hit animation completed ).

[mr_malee]

Okay, so now I have

for(i = 0; i <= 200; i++){
	if(!this.hitBox.hitTest(_root["obstacle"+i].hitBox)){
		this._x = x;
		this._y = y;
	}
}

other stuff

if(Key.isDown(Key.UP)){
		if(Key.isDown(Key.SHIFT)){ //Player runs when shift is held with controls
			this.gotoAndStop("RunN");
			y -= 6;
		}else{
			this.gotoAndStop("WalkN");
			y -= 2;
		}
}

^^repeated for each keystroke

But now the hero doesn't move at all.

x and y cannot be temporary variables, in you loop trace out what x and y are. To use this method (bounding box hitTest) you'll need to update your coordinates before the hit, because hitTest uses your _x and _y movieclip coordinates for a bounding box hitTest. In my original post i used shapeflag which tests a point against a shape. So in order to use a bounding box method you will have to project your movieclip out of the collision. A common way is to just use the inverted velocity. But this will make your movieclip act sticky to the object when trying to move diagonally along it

[brad_sk88]

The diagonal thing isn't a problem, this is a direct port and the original game had no diagonal movement, just 4 way. I may change it later but for now I'm keeping it that way.

Unfortunately, I don't know how to use the 'inverted velocity,' can you elaborate?

[mr_malee]

i'm not sure what the correct term is, velocity, speed, acceleration or force but basically its the:

var speed = 6 bit

_x += speed

if you collide, simply say, _x -= speed

[brad_sk88]

I've done that, but when you turn around while the hero is 'bouncing' away you slide backwards over the object....

[mr_malee]

i fixed your fla

[brad_sk88]

Wow, that's so simple, yet I would have never thought of it on my own.. Thanks.

[Flyingcow]

i dunno if you have the framerate set to low or not. but it is very very choppy.

i think this could be because of your for loop of 200 hittests. From looking at your game, the rocks/bushes look the same size as the character. I would suggest using a tile engine. It will speed things up a lot and make everything easier.

[brad_sk88]

It's running fine on my computer, anyone else having issues with speed?

(link is in first post)