Finding the Target Angle between two vectors

Help and Feedback Scripting Support
#21

Not at all, the height (y) of the target part varies, depending on where the ray hits.

#22

Ok that’s probably fine. Try something like this:

local a=baseplate.CFrame.lookVector*-1
a=Vector2.new(a.X,a.Z)
local b=(Vector3.new(target.Position.X,baseplate.Position.Y,target.Position.Z)-baseplate.Position).Unit
b=Vector2.new(b.X,b.Z)

local cost=(a:Dot(b))/(a.Magnitude*b.Magnitude)
local t=math.acos(cost)
print(t)

I can walk you through the math later if you want. But I really want to see how this does first. :slightly_smiling_face::

1 Like
#23

local cost=(a:Dot(b))/(a.Magnitude*b.Magnitude)

Is there an extra parenthesis here?

#24

A lone parenthesis? I don’t see one. Is your HingeConstraint’s ActuatorType set to Servo?

#25

Yeah, it is. :eyes: :thinking: :smile:

#26

Oh ok. That might mean we will need to add our angle to the current TargetAngle. :thinking:

#27

It will be returned in Radians correct? Not Degrees?

#28

It will return as degrees not radians.

Update: Actually, let me check.

#29

I was wrong. It returns in radians.

1 Like
#30

Okay I was wrong as well… the front vector is actually facing towards the right of the mortar… Which means the baseplate’s front vector is actually negative RightVector

1 Like
#31

Just to update this so far:

local a=baseplate.CFrame.RightVector*-1
a=Vector2.new(a.X,a.Z)
local b=(Vector3.new(target.Position.X,baseplate.Position.Y,target.Position.Z)-baseplate.Position).Unit
b=Vector2.new(b.X,b.Z)

local cost=(a:Dot(b))/(a.Magnitude*b.Magnitude)
local t=math.acos(cost)
local angle=math.deg(t)
print(angle)
#32

It’s partially working, it won’t rotate left at all.

https://gyazo.com/78711c68b15dd9ebfb01459fff4ebca1.gif

Output of T:

  62.015907206196
  72.197744334062
  80.393969837658 (x2)
  80.545715200787 (x6)
  90.42974063954
  115.49450465057
  118.32042315943 (x2)
  113.23179367071
  111.91522450319 (x3)

local A = Baseplate.CFrame.RightVector * -1
A = Vector2.new(A.X, A.Z)
	
local B = ( Vector3.new(Hit.X, Baseplate.CFrame.Y, Hit.Z) - Baseplate.CFrame.p ).Unit
B = Vector2.new(B.X, B.Z)
	
local Cost = ( A:Dot(B) ) / (A.Magnitude * B.Magnitude)
local T = math.acos(Cost)
	
print(math.deg(T))

I use a bunch of capitals… haha a bit non conventional.

2 Likes
#33

That’s normal. I actually expected that to happen. (just hadn’t mentioned it yet) :stuck_out_tongue:
We need a way to figure out when our angle should be subtracted. Give me a minute to try and figure something out. :thinking:

2 Likes
#34

Will every mortar’s base part always have the save orientation? (I hope so :stuck_out_tongue:)

#35

Lol, nope. The way it spawns is it’s placed directly in front of your character on the ground. So it’s facing the same direction as the player.

#36

This actually turned out to be a lot more difficult than I expected, Actually the parabola seemed easier. But that’s probably because I looked up the formula. Haha

#37

Could you try adding this after the angle is calculated:

local x=nozzle.CFrame:PointToObjectSpace(target.Position)
print(x.Z)

After you do that, could you hit play and show me what happens similar to what you posted above?

1 Like
#38

https://gyazo.com/ba4bc40fd3964f289b73634242f918d2.gif

  -4.8550653457642
  -5.9226531982422
  -8.0932426452637
  -9.8448848724365
  -13.027925491333
  -12.001844406128
  31.100881576538
  50.444561004639
  79.524765014648
  80.549499511719 (x51)
  21.992385864258
  17.524366378784
#39

Sorry, could you do that again and sweep between the left side of the nozzle and the right side. I’m trying to figure out if you get a negative output when your mouse is to the left of the nozzle and a positive output if it’s on the right side. Your mouse stayed to the left of the nozzle the entire time. I’m pretty hopful since I saw mostly negative numbers. But try keeping the mouse over on the other side to see if you get positive numbers.

#40

https://gyazo.com/744a238be5f4cdc2a9192b05c6dd35cb.gif

-16.302471160889
  -17.394468307495
  -11.611865997314
  -10.058298110962
  -9.9586334228516
  -9.8046932220459
  -7.5283803939819
  -6.6902565956116
  -7.1277585029602
  -7.531792640686
  -8.0928020477295
  -9.6837329864502
  -9.3881597518921
  -9.4646100997925
  -8.5556716918945
  -9.3337001800537
  -6.2375454902649
  -5.7798442840576
  -6.0139751434326
  -6.1250791549683
  -6.7178807258606
  -7.8094615936279
  -6.7452449798584
  -6.8286004066467
  -7.0145587921143
  -7.3607110977173
  -5.6080870628357
  -5.1491408348083
  -5.4976568222046
  -5.5263962745667 (x38)
  -3.6308784484863
  -1.4806373119354
  -2.232314825058
  -2.6993093490601
  -3.5148768424988
  -4.2912278175354
  -5.004047870636
  -5.6491546630859
  -6.1727752685547
  -6.6697034835815
  -6.9977197647095