cant get x,y,z co-ords of child

Blitz3D Forums/Blitz3D Programming/cant get x,y,z co-ords of child

slenkar

(Posted 2007) [#1]

I created a level in wings3d, exported to OBJ then imported into UU3D and exported to B3D format.
When I click on a child entity (like a barrel or crate) I can get it to move using moveentity but when I use entityX it always returns the position of the level mesh itself.
can anyone help?

Gabriel

(Posted 2007) [#2]

EntityX has a parameter to return the global position.

EntityX# ( entity[,global] )

It defaults to false, so you'll need to specify true for a global position.

slenkar

(Posted 2007) [#3]

sorry, forgot to mention, I tried that,
but it always returns 10,10,10 - the position of the parent

GfK	(Posted 2007) [#4]

Its most likely a problem with the way wings has exported the model. Had similar problems using .X format meshes exported from lightwave.

slenkar

(Posted 2007) [#5]

it seems that wings puts the child's entity at 0,0,0,
and the child's mesh at the co-ordinates specified

does anyone know of a program that places the child's entity at the same location as its mesh?
ill try UU3d

caff_

(Posted 2007) [#6]

I'd imagine UU3D should work.. if not try milkshape?

Gabriel

(Posted 2007) [#7]

Ah yes, I've had this problem with meshes exported from 3dsMax too. I can't remember if I was exporting via UU3D or B3D Pipeline at the time, but yep, it's definitely an export issue, and it seems to be a common one.

b32	(Posted 2007) [#8]

You could try this function. It might not work in all circumstances, but maybe you can tweak it a bit:

Function ReplacePos(mesh)

	If EntityClass(mesh) = "Mesh" Then
		minx# = 10000
		miny# = 10000
		minz# = 10000
		maxx# = -10000
		maxy# = -10000
		maxz# = -10000
		For i = 1 To CountSurfaces(mesh)
			surf = GetSurface(mesh, i)
			For j = 0 To CountVertices(surf) - 1
				x# = VertexX(surf, j)
				y# = VertexY(surf, j)
				z# = VertexZ(surf, j)
				If x < minx Then minx = x
				If x > maxx Then maxx = x
				If y < miny Then minx = y
				If y > maxy Then maxx = y
				If z < minz Then minx = z
				If z > maxz Then maxx = z
			Next
		Next
		midx# = (minx + maxx) / 2
		midy# = (miny + maxy) / 2
		midz# = (minz + maxz) / 2
		PositionMesh mesh, -midx, -midy, -midz
		PositionEntity mesh, midx, midy, midz
	End If

	For i = 1 To CountChildren(mesh)
		ReplacePos(GetChild(mesh, i))
	Next
	
End Function

Gabriel

(Posted 2007) [#9]

Yep, that's how I did it in the end. It's fine if all your objects are generally centered around their geometric center.

slenkar

(Posted 2007) [#10]

great thanks, ill check it out

octothorpe

(Posted 2007) [#11]

				x# = VertexX(surf, j)
				y# = VertexX(surf, j)
				z# = VertexX(surf, j)

should be

				x# = VertexX(surf, j)
				y# = VertexY(surf, j)
				z# = VertexZ(surf, j)

b32	(Posted 2007) [#12]

Erm .. yes .. sorry, I will edit it. Thanks!