Thats a damn awesome script. Between this & all the other posts Ive learned
a great deal on what I inquired about. You guys did an outstanding job. Once
again this script is verydetailed & looks great.
You were right when you said entertaining, Ive always been a fan of game
programming & have wanted one day perhaps code a small game or something
like that. Do you have a working example of this online that I can play
with!?!?!? Please Please Please!!! lmao
Once again on a serious note, to everyone that posted, good job guys. If you
have that game online or avialable to try out Id love to play with it, Post
Link!!! hehe
Sincerely,
Mike
>From: "Daniel Kemp" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: CF-Talk <[EMAIL PROTECTED]>
>Subject: RE: Real Life Math Computations....
>Date: Fri, 17 Nov 2000 17:02:11 -0000
>
> > There are a couple of built-in functions within Cold Fusion
> > as well as other languages like Javascript etc. etc. that
> > Im curious about.
>
> > Abs()
> > Atn() (or otherwise referred to as Atan)
> >
> > Anyone have a real world example of these within a CF
> > App???
>
>Yup here's an entertaining, if not unlong snippit of code...
>
>It's used to help run a virtual ecosystem, the below helps me work out
>which target creatures are within the source creatures Field of
>Vision. i.e. the sourceCreature can be facing 45 degree (northwest),
>and have a FoV of 120 degree, the below code works out the angle
>between the source creature and target creature, and then the angle
>between that angle and the facing angle (nording) of the source
>creature, and checks to see if it falls within the FoV.
>
>Of course I assume the whole thing would be faster in <cfscript> and
>using some form of look-up table.
>
>I don't know about "real-world", but this is artificial world :)
>
>-----------------------------
>
><cfset skipCalc = false>
><cfif targetX EQ sourceX AND targetY GTE sourceY>
> <cfset skipCalc = true>
> <cfset newAngle = 0>
></cfif>
>
><cfif targetX EQ sourceX AND targetY LT sourceY>
> <cfset skipCalc = true>
> <cfset newAngle = 180>
></cfif>
>
><cfif targetY EQ sourceY AND targetX GT sourceX>
> <cfset skipCalc = true>
> <cfset newAngle = 90>
></cfif>
>
><cfif targetY EQ sourceY AND targetX LT sourceX>
> <cfset skipCalc = true>
> <cfset newAngle = 270>
></cfif>
>
><cfif skipCalc NEQ true>
><cfset fraction = Evaluate((abs(sourceX - targetX)/abs(sourceY -
>targetY)))>
><cfset baseAngle = Evaluate(Atn(fraction) * (180/PI()))>
>
><cfif targetX GTE sourceX and targetY GTE sourceY>
> <cfset newAngle = baseAngle>
></cfif>
>
><cfif targetX GTE sourceX and targetY LT sourceY>
> <cfset newAngle = int(180-baseAngle)>
></cfif>
>
><cfif targetX LT sourceX and targetY GTE sourceY>
> <cfset newAngle = int(360-baseAngle)>
></cfif>
>
><cfif targetX LT sourceX and targetY LT sourceY>
> <cfset newAngle = int(180+baseAngle)>
></cfif>
></cfif>
>
><!--- check to see if the target creature is within the sources
>Fov --->
><cfif abs(sourceNording - newAngle) LT abs(sourceNording -
>(newAngle-360))>
> <cfset testAngle = abs(sourceNording - newAngle)>
><cfelse>
> <cfset testAngle = abs(sourceNording - (newAngle-360))>
></cfif>
><cfif testAngle LTE (sourceFoV/2)>
>
> <!--- Work out the attack strength, i.e. the one we'd inflict the
>most damage on, who
> isn't too far away --->
> <cfset Distance = int(SQR((sourceX - targetX)*(sourceX -
>targetX)+(sourceY - targetY)*(sourceY - targetY)))>
><cfset attackStrength = int((128-Distance)*(TvTMod/100)*(TvTMod/100))>
>
> <!--- if there is a attack strength, then this is a better
>target --->
> <cfif attackStrength GT targetCreatureScore AND Distance LTE
>sourceDoV AND Distance LTE int(sourceDistance*5)>
> <cfset targetCreatureScore = attackStrength>
> <cfset targetCreature = targetID>
> <cfset targetCreatureX = targetX>
> <cfset targetCreatureY = targetY>
> <cfset targetDistance = Distance>
> <cfset targetAngle = int(newAngle)>
> <cfset sourceTargetTheta = int(testAngle)>
> </cfif>
></cfif>
>
>----------------------------
>
>Oh yeah, and for the record, here's the SQL that get's the 10 nearest
>target creatures, within the source creatures view distance.
>
><cfquery name="findCreatures" datasource="miniSphere" maxRows="10">
> SELECT id as targetID,
> x as targetX,
> y as targetY,
> creatureType as targetCreatureType,
> dmgTvTMod.modify as TvTMod,
> dmgAvBMod.modify as AvBMod
> FROM creature,
> dmgTypeVrsTypeMod dmgTvTMod,
> dmgAttackVrsBodyMod dmgAvBMod
> WHERE id <> #sourceID#
> AND energyLevel > 0
> AND dmgTvTMod.defenderTypeID = creatureType
> AND dmgTvTMod.attackerTypeID = #sourceCreatureType#
> AND dmgAvBMod.bodyTypeID = bodyType
> AND dmgAvBMod.attackTypeID = #sourceAttackType#
> ORDER BY ((x-#sourceX#)*(x-#sourceX#)+(y-#sourceY#)*(y-#sourceY#))
></cfquery>
>
>Notice the scary ORDER BY bit, any suggestions on how to turn that
>into a stored procedure greatly welcomed :)
>
>-------------------------
>
>R'grds,
>Dan.
>
>
>
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