Rotation

[annikk.exe]

Occam's Razor, etc.  :>

[Aino]

Yes, it is done

[Aino]

I just saw that Atan2 calculates angles between two points x.x

Just do math.atan2(x2-x1,y1-y2) and it should work, it works together with math.sin/cos since it returns negative to positive pi >.<

And as we know, be is the circle, you can use pi*2 in sin/cos to get a circle instead of using negative, but negative works just as well

I've been experiementing alot with trigonometry


Going to test it now, solving the most ancient programming question I've had in my mind since I started with math...

[Aino]

Results Test 1:

Weird that this code halflike works:

Code: [Select]

function LevelSetup()
Globals.G.Asteroids=0
Globals.G.EnemyFactionsMin=0
Globals.G.EnemyFactionsMax=0
Globals.Asteroids.SpawnCap=0
SetBackdropColour(0,0,0)

a = AddAsteroid(0,0)
a.Radius = 50
a.Owner = 1
a.TreeCap = 1
a:AddSeedlings(10)

posx = -100
posy = -100

end

function LevelLogic()

end

function GetMouseX()

return(GetCameraX()+(((GetMouseScreenX()-(GetScreenWidth()/2)))*GetCameraZoom()))

end

function GetMouseY()

return(GetCameraY()+(((GetMouseScreenY()-GetScreenHeight()/2))*GetCameraZoom()))

end

function LevelDraw()

local dx = posx-GetMouseY()
local dy = posy-GetMouseX()

local atan2 = math.atan2(dx,dy)
local dist = math.sqrt((dx^2)+(dy^2))

DrawLine(posx,posy,posx+math.cos(atan2-math.pi)*dist,posy+math.sin(atan2-math.pi)*dist,1,1,1,1,1,1,1,1,5)

end
Because of:

Code: [Select]

local dx = posx-GetMouseY()
local dy = posy-GetMouseX()
Where the values are switched, WTH?

Though it only work on perfectly similar positions, like (-100,-100) or (100,100)

Test 2 soon, I'm gonna get to the bottom of this seed!

[Aino]

Attempt 2, succesful!

Code: [Select]

function LevelSetup()
Globals.G.Asteroids=0
Globals.G.EnemyFactionsMin=0
Globals.G.EnemyFactionsMax=0
Globals.Asteroids.SpawnCap=0
SetBackdropColour(0,0,0)

a = AddAsteroid(0,0)
a.Radius = 50
a.Owner = 1
a.TreeCap = 1
a:AddSeedlings(10)

posx = -100
posy = -100

end

function LevelLogic()

end

function GetMouseX()

return(GetCameraX()+(((GetMouseScreenX()-(GetScreenWidth()/2)))*GetCameraZoom()))

end

function GetMouseY()

return(GetCameraY()+(((GetMouseScreenY()-GetScreenHeight()/2))*GetCameraZoom()))

end

function LevelDraw()

local dx = posx-GetMouseX()
local dy = posy-GetMouseY()

local atan2 = math.atan2(dx,dy)
local atan22 = math.atan2(dy,dx)
local dist = math.sqrt((dx^2)+(dy^2))

DrawLine(posx,posy,posx+math.cos(atan2-(atan22/2))*dist,posy+math.sin(atan2-(atan22/2))*dist,0,1,0,1,1,1,1,1,5)
DrawLine(posx,posy,posx+math.cos(atan2-atan22)*dist,posy+math.sin(atan2-atan22)*dist,1,0,0,1,1,1,1,1,5)
DrawLine(posx,posy,posx+math.cos(atan2)*dist,posy+math.sin(atan2)*dist,1,1,1,1,0,1,0,1,5)
DrawLine(posx,posy,posx+math.cos(atan22-math.pi)*dist,posy+math.sin(atan22-math.pi)*dist,1,1,1,1,1,0,0,1,5)
DrawText(atan2,GetMouseX(),GetMouseY(),1,25)

end
!!

My life is complete!!

I love using memes

Edit:

Uploaded the complete file without extra arrows, it should work!

[Aino]

I realize I've solved alot of problems, of my own(coding wise), with three lines of code o.o

The three can be compressed to one even

This is so awesome