Circle hitTest problem

[Morningdeath]

As u are all well aware. Simple hitTests just create this collision square. I have been spending quite a while trying to make the hittest radial but even As:Main didn't really help. So I have decided to give specifics. My circle mc is _root.main and it is 50 by 50. I was wondering if someone could give me a simple code to make the circle have a circular hitTest.

Also maybe tell me where to put all my hitTest code (If it has to be specific)

[Cecemel]

The easiest way is just using a for loop, and shapeflag.

[Morningdeath]

I have looked at the tuts but they don't work. And when i write one myself it still acts with the stupid square hitTest

:(

[Hate-or-Hate]

i dont know what shapeflag is but i think the best way is the hittest with the spots
hitTest(0,0,true) will make it work in the middle you may do few points ... well search for a tuts for this there are alot here...

[Cecemel]

for (i=1; i<=360; i += 10) {
X = (Math.cos(i*(Math.PI/180))*_width/2)+_x;
Y = (Math.sin(i*(Math.PI/180))*_width/2)+_y;
if (whatever.hitTest(X, Y, true)) {
stuff
}

put this in the circle movieclip if its center is in its center :]
it basically gets 360/10=36 points on the circle and tests if whatever hits any of them.

[CaiWengi]

onClipEvent (load) {
radius = ###
}
onClipEvent (enterFrame) {
for (i=0; i<360; i++) {
X = (Math.cos(i*(Math.PI/180))*radius)+_x;
Y = (Math.sin(i*(Math.PI/180))*radius)+_y;
if (_root.shape.hitTest(X, Y, true)) {
trace("hit")
}
}
}

Taken from here, written by 23450

AS 2

[Morningdeath]

I have triied both your codes. Could someone maybe post a small fla of a circle with the code on it cause I put it on mine.
onClipEvent (enterFrame) {
for (i=1; i<=360; i += 10) {
X = (Math.cos(i*(Math.PI/180))*_width/2)+_x;
Y = (Math.sin(i*(Math.PI/180))*_width/2)+_y;
if (_root.main.hitTest(X, Y, true)) {
trace("yay");
}
}
}

It is tracing yay always. what is it hitTesting. what does the X,Y, true mean. These are sort of the questions i need answered....

[Cecemel]

At 6/9/08 08:04 AM, CaiWengi wrote: for (i=0; i<360; i++) {

this would lag like hell though, 1 point every 10 pixels is more than enough.

[Swordsbite]

In the stuff I make, I have a variable on the circle called

radius

Now, you would set that up so it works like this

onClipEvent(load) {
radius = 8.5;
}

You can change the 8.5 to something smaller or higher depending on how it turns out in your test.

Now, for the hitTests, you would use a while loop. So you make have something like this

	_x += Key.isDown(Key.RIGHT)*power;
	_x -= Key.isDown(Key.LEFT)*power;
	_y += Key.isDown(Key.DOWN)*power;
	_y -= Key.isDown(Key.UP)*power;
	// wall22 HitTests 
	while (_root.wall2.hitTest(_x, _y+radius, true)) {
		_y--;
	}
	while (_root.wall2.hitTest(_x, _y-radius, true)) {
		_y++;
	}
	while (_root.wall2.hitTest(_x-radius, _y, true)) {
		_x++;
	}
	while (_root.wall2.hitTest(_x+radius, _y, true)) {
		_x--;
	}

And there ya go. Dont worry about the power, I always write that as my speed variables and I just added it in so u could see.

Good Luck on your game

[Morningdeath]

what is the _root.wall2 u are referring to. Does that mean it hits a wall called wall2?
I am testing out your code though.

I AM ALMOST IN DESPAIR....
I just need a freaking radial hitTest and it is becoming so bloody hard.

I can code all this shit in my game but I can't do a simple hitTest....

Moans*

I still recon someone should upload a small fla that works...

WHAT AM I DOING WRONG!
And i gtg sleep now which sucks.

[CaiWengi]

At 6/9/08 08:04 AM, CaiWengi wrote: onClipEvent (load) {
radius = ###
}

onClipEvent (enterFrame) {
for (i=0; i<360; i++) {
X = (Math.cos(i*(Math.PI/180))*radius)+_x;
Y = (Math.sin(i*(Math.PI/180))*radius)+_y;
if (_root.shape.hitTest(X, Y, true)) {
trace("hit")
}
}
}

Taken from here, written by 23450

AS 2

If you dont understand it then click the link. What more do you want?

[Morningdeath]

But I don't understand. What is the X,Y. And when i have an if (hitTest) bla bla.... statement then I don't know where to put it. It traces hit forever as well so I need help.

[Morningdeath]

FUCK. I got it. Soz for wasting your time. And thanks for helping. I played with your codes and it finnally worked. TY now this topic can die...

[Vengeance]

At 6/9/08 08:09 AM, Morningdeath wrote: Blah blah blah
onClipEvent (enterFrame) {
for (i=1; i<=360; i += 10) {
X = (Math.cos(i*(Math.PI/180))*_width/2)+_x;
Y = (Math.sin(i*(Math.PI/180))*_width/2)+_y;
if (_root.main.hitTest(X, Y, true)) {
trace("yay");
}
}
}

The problem here is that you're checking if the object is hitting itself.

onClipEvent (enterFrame) {
for (i=1; i<=360; i += 10) {
X = (Math.cos(i*(Math.PI/180))*_width/2)+_x;
Y = (Math.sin(i*(Math.PI/180))*_width/2)+_y;
if (_root.THEOBJECTHATYOUWANTITTOHIT.hitTest(X, Y, true)) {
trace("yay");
}
}
}

[WolfAkela]

If you're just trying to see if a point is inside the circle you should just use the distance formula. Distance = radius

[Swordsbite]

Heres a fla without all this complicated hitTests (suposively i dont understand for loops yet) that will help you

yes, wall2 is just the levels instance name, youll see

http://spamtheweb.com/ul/upload/090608/3 2676_Circle_HitTest.fla