1 Topic by HondaDirtBiker (edited by HondaDirtBiker 2006-06-03 20:13:30)

  • From: United States
  • Registered: 2006-01-05
  • Posts: 37

Topic: Using values given by Irrlicht.

I need to get the position of a node and use each dimension of the vector.
I use "Node.GetPosition()". I would like to apply the vector to a variable. Then get individual dimensions from the variable.
I am having a problem when I apply the nodes position to variables.

Here is an example of my code.

Const ScreenW=1024, ScreenH=768
Local PlayerPos
Local TargetPos
Local HUDArrow = "HUDArrow.bmp"

PlayerPos = Node.GetPosition()
TargetPos = Node2.GetPostion()

Local = AngleX = ACos((PlayerPos[0],PlayerPos[1]*TargetPos[0],TargetPos[1])/(Mod(PlayerPos[0],PlayerPos[1])Mod(TargetPos[0],TargetPos[1])))
Local = AngleY = ASin((PlayerPos[0],PlayerPos[2]*TargetPos[0],TargetPos[2])/(Mod(PlayerPos[0],PlayerPos[2])Mod(TargetPos[0],TargetPos[2])))
Local = AngleZ = ACos((PlayerPos[1],PlayerPos[2]*TargetPos[1],TargetPos[2])/(Mod(PlayerPos[1],PlayerPos[2])Mod(TargetPos[1],TargetPos[2])))
Local = HUDX = Cos((AngleX-AngleZ)*(ScreenW/2))
Local = HUDY = Sin((AngleY-AngleZ)*(ScreenH/2))

Video.Draw2DImage(HUDArrow, T_irrPosition2d_s32.Create (HUDX, HUDY))

What type of variables could I use?

Thank you.

HondaDirtBiker's Website

  • gman
  • Administrator
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  • Registered: 2006-01-04
  • Posts: 764

Re: Using values given by Irrlicht.

greetings smile  getPostion() returns an instance of T_irrVector3df.  while the C++ version of Irrlicht has operator overloads that allow you to use math directly on instances of this type and use indexers, BMAX unfortunately does not due to limitations in the language.  while you cant directly use them, the operator overloads for each C++ type have been converted to methods of the type.  your code should be changed to something like:

Const ScreenW=1024, ScreenH=768
Local PlayerPos:T_irrVector3df
Local TargetPos:T_irrVector3df
Local HUDArrow = "HUDArrow.bmp"

PlayerPos = Node.GetPosition()
TargetPos = Node2.GetPostion()

Local AngleX:Float = ACos((PlayerPos.getX(),PlayerPos.getY()*TargetPos.getX(),TargetPos.getY())/(Mod(PlayerPos.getX(),PlayerPos.getY())Mod(TargetPos.getX(),TargetPos.getY())))
Local AngleY:Float = ASin((PlayerPos.getX(),PlayerPos.getZ()*TargetPos.getX(),TargetPos.getZ())/(Mod(PlayerPos.getX(),PlayerPos.getZ())Mod(TargetPos.getX(),TargetPos.getZ())))
Local AngleZ:Float = ACos((PlayerPos.getY(),PlayerPos.getZ()*TargetPos.getY(),TargetPos.getZ())/(Mod(PlayerPos.getY(),PlayerPos.getZ())Mod(TargetPos.getY(),TargetPos.getZ())))
Local HUDX:Float = Cos((AngleX-AngleZ)*(ScreenW/2))
Local HUDY:Float = Sin((AngleY-AngleZ)*(ScreenH/2))

Video.Draw2DImage(HUDArrow, T_irrPosition2d_s32.Create (HUDX, HUDY))