hitTests problem

[adminz]

I have had a bad time with hitTests lately. I need some help with my character not falling through the wall. Here's the code:
onClipEvent(load){
speed = 10;
grav = 0;
}
onClipEvent(enterFrame) {
if(_root.Player.hitTest(_root.Wall)){
this._y -= 10;
this._x += 10;
}
_y += grav;
grav++;
if(Key.isDown(Key.RIGHT)){
_x += speed;
}
if(Key.isDown(Key.LEFT)){
_x -= speed;
}
}
The code in put in the character. Please help soon.

[Magicalmonkeyguy]

use this instead

onClipEvent(load){
speed = 10;
grav = 0;
wall = _root.wall
}
onClipEvent(enterFrame) {
while(wall.hitTest(_x,_y,true)){
_y-=grav;
grav=0;
}
_y += grav;
grav++;
if(Key.isDown(Key.RIGHT)){
_x += speed;
}
if(Key.isDown(Key.LEFT)){
_x -= speed;
}
}

even this isnt the best and i wouldn't use it, but it is a start.
try it out, if you dont like the results, the ultimate platformer tutorial helps a lot.

[Magicalmonkeyguy]

this code works without any serious issues

onClipEvent (load) {
	var ground:MovieClip = _root.ground;
	var grav:Number = 0;
	var gravity:Number = 2;
	var speed:Number = 15;
	var maxjump:Number = -30;
	var onground:Boolean = false;
}
onClipEvent (enterFrame) {
	_y += grav;
	grav += gravity;
	while (ground.hitTest(_x, _y, true)) {
		_y -= gravity;
		grav = 0;
	}
	if (ground.hitTest(_x, _y+5, true)) {
		onground = true;
	} else {
		onground = false;
	}
	if (Key.isDown(Key.RIGHT)) {
		_x += speed;
	}
	if (Key.isDown(Key.LEFT)) {
		_x -= speed;
	}
	if (Key.isDown(Key.UP) && onground) {
		grav = maxjump;
	}
	if (ground.hitTest(_x+(_width/2), _y-(_height/2), true)) {
		_x -= speed;
	}
	if (ground.hitTest(_x-(_width/2), _y-(_height/2), true)) {
		_x += speed;
	}
	if (ground.hitTest(_x, _y-(_height), true)) {
		grav = 3;
	}
}

just rename your wall instance name ground if you want to copy paste.

with this your ground can be any shape as long as its thick enough.
it also works with walls and ceilings.

[Kart-Man]

Make sure that your player's instance name is "Player"; it is case-sensitive.

Oh, and using shapeFlag to check whether the right or left sides of the player are colliding with the wall:

if (_root.Wall.hitTest(_x+this._width/2, _y, true)) {
	_x-=speed;
}
if (_root.Wall.hitTest(_x-this._width/2, _y, true)) {
	_x+=speed;
}

Simply put, we are hitTesting a certain point of the player -- the coordinate is the _x coordinate PLUS half of the its width. That is the precise point where it is going to check for collisions. This goes for the opposite side as well, but SUBTRACT half of its width.

For more information, look at Actionscript Dictionary: MovieClip.hitTest.

[Kart-Man]

At 2/9/09 12:07 AM, Magicalmonkeyguy wrote: this code works without any serious issues
code

Ack, beat me to it. :P

[adminz]

Neither of those scripts did anything...

[Magicalmonkeyguy]

At 2/9/09 12:18 AM, adminz wrote: Neither of those scripts did anything...

then you are doing something crazy wrong.

[adminz]

At 2/9/09 12:30 AM, Magicalmonkeyguy wrote:

At 2/9/09 12:18 AM, adminz wrote: Neither of those scripts did anything...

then you are doing something crazy wrong.

I put the exact coding in my player...I don't see whats wrong

onClipEvent (load) {
var ground:MovieClip = _root.ground;
var grav:Number = 0;
var gravity:Number = 2;
var speed:Number = 15;
var maxjump:Number = -30;
var onground:Boolean = false;
}
onClipEvent (enterFrame) {
_y += grav;
grav += gravity;
while (ground.hitTest(_x, _y, true)) {
_y -= gravity;
grav = 0;
}
if (ground.hitTest(_x, _y+5, true)) {
onground = true;
} else {
onground = false;
}
if (Key.isDown(Key.RIGHT)) {
_x += speed;
}
if (Key.isDown(Key.LEFT)) {
_x -= speed;
}
if (Key.isDown(Key.UP) && onground) {
grav = maxjump;
}
if (ground.hitTest(_x+(_width/2), _y-(_height/2), true)) {
_x -= speed;
}
if (ground.hitTest(_x-(_width/2), _y-(_height/2), true)) {
_x += speed;
}
if (ground.hitTest(_x, _y-(_height), true)) {
grav = 3;
}
}

[Denvish]

Make sure you have changed your 'wall' instance name to 'ground', as Magicalmonkeyguy said. If it still doesn't work, you'll have to be more specific about exactly HOW it's failing.

Here's a more basic hitTest code that works, but doesn't include jumping etc. It will only work for downfall, not sideways, but is relatively easily adapted.

onClipEvent (load) {
	var ground:MovieClip=_root.ground;
	var yvel:Number=0;
	var gravity:Number=1;
	var speed:Number=10;

}
onClipEvent (enterFrame) {
	yvel+=gravity;
	_y+=yvel;
	if(ground.hitTest(this)){
		while(ground.hitTest(this)){
			_y-=0.1;
		}
	}
	if(Key.isDown(Key.RIGHT)){_x+=speed;}
	if(Key.isDown(Key.LEFT)){_x-=speed;}
}

Fla

[roxasreaper]

hey i have the same problem and non of these codes work for me either

[Denvish]

The code works, download the fla at the bottom of my last post and test it.

[Kwing]

If you made the walls a different Movie Clip than the floor, try this:

onClipEvent(load){
speed = 10;
grav = 0;
}
onClipEvent(enterFrame) {
if(_root.Player.hitTest(_root.Wall)&&Key.isDown(Key.LEFT)){
this._x += speed;
}
if(_root.Player.hitTest(_root.Wall)&&Key.isDown(Key.RIGHT)){
this._x -= speed;
}
_y += grav;
grav++;
if(Key.isDown(Key.RIGHT)){
_x += speed;
}
if(Key.isDown(Key.LEFT)){
_x -= speed;
}
}