kirupa.com has a ton of tutorials on Isometric stuff that I've found very useful.
http://www.kirupa.com/developer/flash/index.htm#Isometry --- Jobe Makar <[EMAIL PROTECTED]> wrote: > Hi Jiri, > > I've pasted below the isometric class that I wrote > for one of my game books. > It is a handy class that allows for easy translation > between screen coords, > and iso coords. In addition, it handles tile-based > dept calculations as > well. You asked how do you handle multiple per tile > - check out the leeway > variable in this class. If leeway is set to 5, and > calculateDepth returns > 1230, then you can place your item anywhere from > 1230 to 1235. You just have > to keep track of which depth is being used. > > You don't have to swap depths of every item every > frame. You just have to > swap depths on any items that has just changed > tiles. > > There are two limitations with this technique: > 1) It does the depth calculations based on the size > of the map. For most > uses this is fine. But if your map is like 5000 X > 5000 tiles, then this > depth calculation can probably quickly get too high > for Flash to handle > without further modifications. > 2) A sortable item needs to be no bigger than a > tile. If the base of this > item takes up multiple tiles (like a couch, or > bench, etc) then you need to > either slice it up into tile-sized pieces, or change > the depth approach. The > approach that you use if you are not slicing it up > does require resorting > lots of item depths frequently rather than using > just using unique depths > per tile. > > //Isometric CLASS > > class com.electrotank.world.Isometric { > private var maxx:Number; > private var maxz:Number; > private var theta:Number; > private var alpha:Number; > private var sinTheta:Number; > private var cosTheta:Number; > private var sinAlpha:Number; > private var cosAlpha:Number; > var leeway:Number; > public function Isometric(x:Number, z:Number) { > maxx = x; > maxz = z; > theta = 30; > alpha = 45; > theta *= Math.PI/180; > alpha *= Math.PI/180; > sinTheta = Math.sin(theta); > cosTheta = Math.cos(theta); > sinAlpha = Math.sin(alpha); > cosAlpha = Math.cos(alpha); > leeway = 5; > } > public function mapToScreen(xpp:Number, ypp:Number, > zpp:Number):Array { > var yp:Number = ypp; > var xp:Number = xpp*cosAlpha+zpp*sinAlpha; > var zp:Number = zpp*cosAlpha-xpp*sinAlpha; > var x:Number = xp; > var y:Number = yp*cosTheta-zp*sinTheta; > return [x, y]; > } > public function mapToIsoWorld(screenX:Number, > screenY:Number):Array { > var z:Number = > (screenX/cosAlpha-screenY/(sinAlpha*sinTheta))*(1/(cosAlpha/sinAlpha+sinAlpha/cosAlpha)); > var x:Number = (1/cosAlpha)*(screenX-z*sinAlpha); > return [x, z]; > } > public function setLeeway(value:Number) { > leeway = value; > } > public function calculateDepth(x:Number, y:Number, > z:Number):Number { > var x:Number = Math.abs(x)*leeway; > var y:Number = Math.abs(y); > var z:Number = Math.abs(z)*leeway; > var a:Number = maxx; > var b:Number = maxz; > var floor:Number = a*(b-1)+x; > var depth:Number = a*(z-1)+x+floor*y; > return depth; > } > } > > > Jobe Makar > http://www.electrotank.com > http://www.electro-server.com > phone: 252-627-8026 > mobile: 919-609-0408 > fax: 919-882-1121 > ----- Original Message ----- > From: "Jiri Heitlager" > <[EMAIL PROTECTED]> > To: <flashcoders@chattyfig.figleaf.com> > Sent: Tuesday, September 11, 2007 8:50 AM > Subject: [Flashcoders] Isometic game - zdepth > managing for multiple > movablecharacters > > > > He guys (and maybe girls), > > > > I have a question that is related to z-depth > managing in an isometric > > game, that needs to be made in AS2. > > In the game I basically use one abstract layer > that holds all the tiles > > and their information wheter or not a movable > object is allowed to 'walk' > > over the tile. Then there is another layer that > holds all the objects, so > > that includes a player, a computer controlled > player and enviormental > > objects that players cannot walk through being the > visualization of the > > first layer. > > Every object gets a z-depth assigned. For the > players the zdpeth need to > > be set based on the tile they are at. This way the > players can walk > > 'around' the enviorment objects. For the z-depth > calculation I use the > > tile grid x and y plus the width of the row, this > generates an unique > > z-depth number and makes sure that the higher the > y, the bigger the > > z-depth , thus objects appear infront of objects > with a lower y index. > > Here is the problem I am trying to figure out. If > two movable objects, or > > even three of them are at the same time on the > same tile, then the above > > described z-depth managing will fail. How do I > deal with that? > > > > Then another question I have is this. Does every > movable object needs to > > check/swap z-depth on every frame. Wouldn't that > be to CPU intensive? > > > > I really hope someone can clear this up for me. > > > > thank you in advance, > > > > Jiri > > _______________________________________________ > > Flashcoders@chattyfig.figleaf.com > > To change your subscription options or search the > archive: > > > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > > > Brought to you by Fig Leaf Software > > Premier Authorized Adobe Consulting and Training > > http://www.figleaf.com > > http://training.figleaf.com > > > > > _______________________________________________ > Flashcoders@chattyfig.figleaf.com > To change your subscription options or search the > archive: > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > Brought to you by Fig Leaf Software > Premier Authorized Adobe Consulting and Training > http://www.figleaf.com > http://training.figleaf.com > ____________________________________________________________________________________ Fussy? Opinionated? 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