Corona light settings

[LUXi]

Hi all,

I need your help. I am struggling with settings of rectangle light to set the vertical position. How to do that?
Any help I could appreciate.

Thanks,
krsz

[tma]

Yes, it can't be exactly on a vertical position, at least from my tests.
We can approche the vertical position ( using the arrow hotspot), but once on 90°, it switches the light emission direction.

[alexhajdu]

Hi. I'd like to help, but I'm afraid I don't understand your issue. Is this correctly working with lights from AC library? It's not more AC issue than Corona Light issue?
Thanks for bringing more light into this.

[tma]

I think , that's what the OP was asking for :

[LUXi]

tma that is correct but how?

[LUXi]

Alex, imagine a rectangle light on a vertical wall as tma presented.

[LUXi]

...like this

[alexhajdu]

Ugh, after 5 minutes of furious clicking I was even not able to rotate a chair :) It's different like generic 3D programs, probably for a good reason. I need to find some tutorials how to rotate an object and then will explore why it's not working for Corona Light.

[alexhajdu]

Maybe I'm wrong, but it seems like @tma knows the trick?

[rozky]

I think the problem is in 3d script

"compute transform":
   EPS = 0.001
   dirX = coro_targetX - coro_posX
   dirY = coro_targetY - coro_posY
   dirZ = coro_targetZ - coro_posZ
   dirLen = SQR(dirX**2 + dirY**2 + dirZ**2)

   if ABS(dirZ) > EPS then
      rotationY = ATN(SQR(dirX**2 + dirY**2)/dirZ)
      if dirZ < 0 then rotationY = 180 + rotationY
   else
      rotationY = 90
   endif

   if ABS(dirX) > EPS then
      rotationZ = ATN(dirY / dirX)
      if dirX < 0 then rotationZ = 180 + rotationZ
   else
      if dirY > 0 then
         rotationZ = 90
      else
         rotationZ = -90
      endif
   endif

2d script can be usefull:

   HOTSPOT2 0,  coro_targetY,  unID, coro_targetX, 1+128 : unID = unID+1
   HOTSPOT2 -1, coro_targetY,  unID, coro_targetX, 3 : unID = unID+1
   HOTSPOT2 coro_targetX, coro_targetY,  unID, coro_targetX, 2 : unID = unID+1

   HOTSPOT2 coro_targetX, 0,  unID, coro_targetY, 1+128 : unID = unID+1
   HOTSPOT2 coro_targetX, -1,  unID, coro_targetY, 3 : unID = unID+1
   HOTSPOT2 coro_targetX, coro_targetY,  unID, coro_targetY, 2 : unID = unID+1

Peter

[alexhajdu]

Thanks @rozky for your help! I will test it and updated Corona Light will be delivered in the next build.
And maybe I will attach it to this thread if you guys need this urgently... cc: @LUXi

[alexhajdu]

I really don't get it. How can I rotate for example column on y-z axis? I tried to change planes, but all I can do is to rotate on x-y axis. Thanks for help :)

[LUXi]

@alexhajdu if you are ready I will be happy to test it.

[rozky]

I really don't get it. How can I rotate for example column on y-z axis? I tried to change planes, but all I can do is to rotate on x-y axis. Thanks for help :)

it's not possible. Morph and shell objects are an exception.
For gdl objects, you can use the hotspots.

[tma]

hi ,

In the 3d view, I grabbed the hotspot on the arrow head of the corona light object , and then rotated the light from there* ( however , it is not possible to get it to be perfecly horizontal ) .

hope it is clear.