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 CastMORay [QUESTION CHANGE!] 
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Asklar
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Post CastMORay [QUESTION CHANGE!]
What does it return?

Let's say I'm using it on particles being fired to me and if they return self then I want to dodge it.

Should I do something like if self.Ray == self then or if self.Ray.ID == self.ID then?

/\-------------------Older doubtz---------------------------/\
-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-,_:;-.,_:;-.,-;
-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-,_:;-.,_:;-.,-;
-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-,_:;-.,_:;-.,-;
-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-.,_:;-,_:;-.,_:;-.,-;
\/-------------------New doubtz----------------------------\/

Does CastMORay ignore terrain? If it does, is there a way to make it get stopped by terrain?


Last edited by Asklar on Mon Dec 05, 2011 11:46 pm, edited 1 time in total.
Mon Dec 05, 2011 12:15 am
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CaveCricket48
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Post Re: CastMORay
It returns an MOID. You should grab the MO of that ID, find the parent MO, and compare the parent MO's ID to self.RootID.
Mon Dec 05, 2011 12:33 am
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Asklar
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Post Re: CastMORay
MovableMan:GetMOFromID(self.Ray).RootID == self.ID?
Mon Dec 05, 2011 12:35 am
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CaveCricket48
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Post Re: CastMORay
Yep, assuming self is the parent object.
Mon Dec 05, 2011 12:40 am
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Asklar
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Post Re: CastMORay
Ok, gone to test.
BRB.
Mon Dec 05, 2011 12:41 am
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Asklar
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Post Re: CastMORay
Not working, it doesn't show errors or anything.

Code:
      if not self:IsPlayerControlled() then
         for particle in MovableMan.Particles do
            self.VectorToTraceAlong = Vector(particle.Vel.X*15,particle.Vel.Y*15)
            self.Ray = SceneMan:CastMORay(particle.Pos,self.VectorToTraceAlong,particle.ID,0,false,0)
            if MovableMan:GetMOFromID(self.Ray) == self.ID then
               self.Vel.X = 15*math.random(-1,1)
            end
         end
      end


This is the code I'm using, it's like some sort of primitive and reactive AI.

(Note it is inside the function Update(self))
Mon Dec 05, 2011 1:01 am
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CaveCricket48
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Post Re: CastMORay
You did "MovableMan:GetMOFromID(self.Ray)" instead of "MovableMan:GetMOFromID(self.Ray).RootID"
Mon Dec 05, 2011 2:15 am
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Asklar
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Post Re: CastMORay
Why didn't I see that?

Testing and BRB.
Mon Dec 05, 2011 3:02 am
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Asklar
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Post Re: CastMORay
Changed it again, the code looks like:
Code:
      if not self:IsPlayerControlled() then
         for particle in MovableMan.Particles do
            self.VectorToTraceAlong = Vector(particle.Vel.X*15,particle.Vel.Y*15)
            self.Ray = SceneMan:CastMORay(particle.Pos,self.VectorToTraceAlong,particle.ID,0,false,0)
            if MovableMan:GetMOFromID(self.Ray).RootID == self.ID then
               self.Vel.X = 15*math.random(-1,1)
            end
         end
      end


It's wierd. It works sometimes. If I shoot at it it might work, if I don't it sometimes works anyway. And I keep getting a very vague error in the lua console which says "attempt to index a nil value" in the if MovableMan:Get... line.

Maybe it has to do with the self.VectorToTraceAlong, but I'm not sure.
Mon Dec 05, 2011 3:12 am
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CaveCricket48
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Post Re: CastMORay
You also forgot to check if the ray doesn't hit anything (self.Ray ~= 255).
Mon Dec 05, 2011 4:02 am
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Asklar
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Post Re: CastMORay
Changed the code to this:
Code:
      if not self:IsPlayerControlled() then
         for particle in MovableMan.Particles do
            self.DodgeDistance = SceneMan:ShortestDistance(self.Pos,particle.Pos,true).Magnitude
            if self.DodgeDistance <= 700 then   
               self.VectorToTraceAlong = Vector(particle.Vel.X*15,particle.Vel.Y*15)
               self.Ray = SceneMan:CastMORay(particle.Pos,self.VectorToTraceAlong,particle.ID,0,false,0)
               if self.Ray ~= 255 then
                  if MovableMan:GetMOFromID(self.Ray).RootID == self.ID then
                  self.Vel.X = 15*math.random(-1,1)
                  end
               end
            end
         end
      end


But it's not working either.
Mon Dec 05, 2011 5:20 am
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Asklar
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Post Re: CastMORay
I was right, the thing was the self.VectorToTraceAlong. Just changed it to particle.Vel and it works perfectly.
Mon Dec 05, 2011 7:02 pm
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Post Re: CastMORay [QUESTION CHANGE!]
Quote:
CastMORay
Traces along a vector and returns MOID of the first non-ignored non-NoMOID MO encountered. If a non-air terrain pixel is encountered first, g_NoMOID will be returned.

Arguments:
-The starting position.
-The vector to trace along.
-An MOID to ignore. Any child MO's of this MOID will also be ignored.
-A specific material ID to ignore hits with.
-Whether to ignore all terrain hits or not.
-For every pixel checked along the line, how many to skip between them for optimization reasons. 0 = every pixel is checked.

Return value:
The MOID of the hit non-ignored MO, or g_NoMOID if terrain or no MO was hit.

Setting fifth argument to false should work. And if it doesn't, try true.
Tue Dec 06, 2011 5:47 pm
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Asklar
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Post Re: CastMORay [QUESTION CHANGE!]
Tried them both, not working.

I used another ray to determine the length of the MORay in order to get a length that wouldn't go across terrain, but still it's not working.

Code:
self.DetectTerrain = SceneMan:CastObstacleRay(self.Weapon.Pos,Vector(650*self.Reverse,0):RadRotate(self.RotAngleFactor),Vector(),Vector(),self.ID,0,0)

self.DetectEnemy = SceneMan:CastMORay(self.Weapon.Pos,Vector(self.DetectTerrain,0):RadRotate(self.RotAngleFactor),self.ID,0,true,0)
Tue Dec 06, 2011 6:49 pm
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CaveCricket48
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Post Re: CastMORay [QUESTION CHANGE!]
You should cast a strength ray instead of an obstacle ray, since, if I'm thinking about this correctly, obstacle rays cast 2 rays at once (one for MOs and one for terrain), which would slow things down a lot. Also, a strength ray is easier to work with.
Tue Dec 06, 2011 6:53 pm
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