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AS2 Conglomeration

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Started 9 months ago by Infrared
Latest reply from redligot2009

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Infrared
Member
Post Count: 8

I'm pretty sure that this hasn't been done before... I'm sorry if it has been, I didn't see it tagged under AS2.

Anyways, the idea is that it's kind of like the Actionscript 2.0 Code topic, but instead of asking questions here, you post code that people could freely use for their games...a compendium of sorts.

So, guidelines:

1. Include what it is for (i.e. platformer game player movement)
2. Actionscript 2.0 only
3. State where the code should go (on a movieclip, etc.)
4. Be sure to state what movieclips/buttons/graphics you need, what frames they should go on, and their instance names.

I have some code for point-and-click player movement, once I'm sure that that this topic is in the clear I'll post it below so it doesn't get too disorganized.

Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

We have other AS2/AS3 threads I think. But tell you the truth, i don't know much on as2, so I am not sure if we can have another thread or not.

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Posted 9 months ago #
Coolnesiac
Member
Post Count: 1067

Haha, fun!

Well, here's some stuff

Basic Platforming Code

var veloY = 0;
var gravity = 0.5;
var jump = 8;
var jumping = false;
var speed = 5;

player.onEnterFrame = function() {
if(Key.isDown(Key.RIGHT)) {
this._x += speed;
}
if(Key.isDown(Key.LEFT)) {
this.x -= speed;
}
if(jumping) {
veloY += 0.5;
}
if(Key.isDown(Key.UP) && jumping == false) {
veloY = 0;
jumping = true;
veloY = -jump;
}

while(ground.hitTest(this._x, this._y-1, true) || ground.hitTest(this._x-2, this._y-1, true) || ground.hitTest(this._x+2, this._y-1, true)) {
if(veloY >= 0) {
veloY = 0;
jumping = false;
this._y-=0.25;
}
else {
break;
}
}
if(!ground.hitTest(this._x, this._y, true) && !jumping && !ground.hitTest(this._x-2, this._y, true) && !ground.hitTest(this._x+2, this._y, true)) {
veloY += 0.5;
jumping = true;
}
}

If there's any problems email me at david.lougheed@gmail.com

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Posted 9 months ago #
Infrared
Member
Post Count: 8

Well, I'm still not 100% sure that this is allowed, but I might as well post this for others to use...

Point-and-click movement (with size change based on perspective):

In order to use these codes, you need to have a movieclip with an instance name of "player", and the walkable area needs to be a movieclip with an instance name of "walkable".

Put the following code on the first frame (or whatever frame you are using):

var perspectiveShrink:Number = -20;
function onLoad() {
_root.createEmptyMovieClip("topStage", 0)
topStage._yscale = 1;
topStage._xscale = stage.width;
topStage._x = 0;
topStage._y = 0;
//create an empty movieclip at the top of the stage
}
function onEnterFrame() {
distance = Math.sqrt(Math.pow(topStage._x - player._x, 2)+Math.pow(topStage._y - player._y, 2))/perspectiveShrink;
if (distance > 50) distance = 50;
player._xscale = 50-distance;
player._yscale = 50-distance;
}

And this belongs on the player movieclip:

onClipEvent (mouseDown)
//This isn't really necessary, it shows if you clicked the walkable area or not
if (_root.walkable.hitTest(_root._xmouse, _root._ymouse, true ) ) {
trace ("yep" ) ;
}
if (!_root.walkable.hitTest(_root._xmouse, _root._ymouse, true ) ) {
trace ("nope" ) ;
}
}
onClipEvent (mouseDown) {
if (_root.walkable.hitTest(_root._xmouse, _root._ymouse, true ) ) {
//load these variables on every click if the player clicked on the walkable area
xMouse = _root._xmouse;
yMouse = _root._ymouse;
moveAngle = Math.atan2(yMouse - this._y, xMouse - this._x ) ;
walkX = Math.cos(moveAngle)*5;
walkY = Math.sin(moveAngle)*5;
}
}
onClipEvent (enterFrame) {
//move
if (playerWalk = true) {
this._x += walkX;
this._y += walkY;
walkDistance = Math.sqrt(((xMouse-this._x) ^ 2)+((yMouse-this._y) ^ 2) ) ;
if (walkDistance < 4) {
walkX = 0;
walkY = 0;
}
}
if (playerWalk = false) {
trace ("I'm not moving" ) ;
}
}

Note: The spaces in between closed parentheses and semicolons are to prevent them from showing up as emoticons...

Note 2: The "playerWalk" is from me trying to debug the code, and it should work if you remove it entirely. I'm not 100% sure though...

Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

Well i will just go with it for now!

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Posted 9 months ago #
wingdemon
Member
Post Count: 2748

i'll post some code for some stuff that'll be really cool and awesome later.

Posted 9 months ago #
wallross
Member
Post Count: 1729

I might post the code I used for aiming in Subterra. I'm also working on IceBoy now, so I can also post tidbits of code from that as well...

Posted 9 months ago #
WJUK
The Lone Ranger
Post Count: 13501

We do have other threads of AS2, but it seems like this topic is specialised (unlike the others which is people asking for help) and people actually want to post and stay on-topic in it.

So, I do feel we can keep this open.

Carry on with the topic. /tangent

Don't click here

Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

thats why i didnt vote for close...

I really suck at Programming so... David, whats a platforming code?

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Posted 9 months ago #
wingdemon
Member
Post Count: 2748

thats why i didnt vote for close...
I really suck at Programming so... David, whats a platforming code?

lol. seriously?

well, a "Platform" game is the most basic of games. Fancy Pants is a platformer. it basically has multiple platforms (ground)that a player can run across and jump to and fro.

like i said Fancy Pants is a great example.

he gave you the bare bones of a platform game. if you want to make a game in AS2m your going to need that code.

Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

oh that makes sense, i thought it would have been different.

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Posted 9 months ago #
Coolnesiac
Member
Post Count: 1067

Fancy pants is very different because of Slope Detection, which is really complex.

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Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

Slope Detection... Sounds like the mix of something sciencey and some thing that has to do with mathematics.

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Posted 9 months ago #
wingdemon
Member
Post Count: 2748

slope detection is pure math. using Arc Tangent (Atan2) to calculate slope to rotate the character and using cos and sin to calculate speed.

actually very simple for math geeks.

its trigonometry.

too bad i'm not a math geek. ^.^

Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

yeah, i know that stuff.. Im a math geek i guess. i learned that last summer though... weird.

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Posted 9 months ago #
Coolnesiac
Member
Post Count: 1067

It's also really finicky cause of the nature of game programming. I know how it works, but it's still weird. Also, you have to get it to move properly according to it's angle and get jump working and all sorts of stuff.

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Posted 9 months ago #
ICARAX
Moderator
Post Count: 3086

interesting...

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Posted 9 months ago #
wingdemon
Member
Post Count: 2748

interesting...

thats exactly the type of post you make just for raising your post count.

and you, icarax, make alot of them.

you shouldn't.

Posted 9 months ago #
wallross
Member
Post Count: 1729

Instead of posting raw code, I might just post a few mathematical formula that I've been using pretty often.

First off, Distance Formula
=Math.sqrt ((x2 - x1)^2 + (y2-y1)^2)
(Knowledge of the midpoint formula is also pretty useful)

The more eagle eyed of you will notice that this is basically the Pythagorean theorem.

Like wingy mentioned, understanding Cos Sin & Tan is also pretty important.

[EDIT] Can you guys do me a favor and beta test this: http://www.newgrounds.com/dump/item/e1713c0a458f62db4dc1da3cdb66efb7

Posted 9 months ago #
wingdemon
Member
Post Count: 2748

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Sorry, had to.

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Posted 9 months ago #

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