Blitz unit scale using CreateCube

Blitz3D Forums/Blitz3D Programming/Blitz unit scale using CreateCube

puki	(Posted 2006) [#1]

Hi, can someone remind me - is a default cube created by 'CreateCube' 1 unit or 2 units (or other) high - ie does it relate to a 1 or 2 metre high block - based on the fact that 1 Blitz unit= 1 metre?

EDIT:
So, for example, sticking 3 default cubes on top of each other makes a stack 3 metres high?

I've always thought it was 1 unit high/wide/deep, therefore 1 metre high/wide/deep. However, looking at geometry created by other Blitzers is now confusing me.

I'd like to stick to 1 unit= 1 metre.

Mustang

(Posted 2006) [#2]

The cube will extend from -1,-1,-1 to +1,+1,+1.

http://www.blitzbasic.co.nz/b3ddocs/command.php?name=CreateCube&ref=3d_cat

IMO it's 2*2*2 units then by default.. ie more largeness than you thought (just had to ;P).

puki	(Posted 2006) [#3]

Yeh could be, I was wondering that - which is why I said is it 1 or 2 units. I wanted to be sure.

So, by the above, I am taking it that the cube is actually 2 metres high/wide/deep.

Anyone have any other opinions?

In the meantime - I have a bit of scaling to do.

Shifty Geezer

(Posted 2006) [#4]

Yes, cubes are 2x2x2 (-1,-1,-1) to (1,1,1). Sphere's are radius 1 too.

Graphics3D 800,600,32,2

cam=CreateCamera()
PositionEntity cam,0,0,-50
CameraZoom cam,20

light=CreateLight()
TurnEntity light,45,45,0

corner1=CreateSphere() : ScaleEntity corner1,0.1,0.1,0.1 : PositionEntity corner1,-1,-1,-1
EntityColor corner1,255,0,0 : EntityOrder corner1,-1
corner2=CreateSphere() : ScaleEntity corner2,0.1,0.1,0.1 : PositionEntity corner2,-1,-1,1
EntityColor corner2,255,0,0 : EntityOrder corner2,-1
corner3=CreateSphere() : ScaleEntity corner3,0.1,0.1,0.1 : PositionEntity corner3,-1,1,-1
EntityColor corner3,255,0,0 : EntityOrder corner3,-1
corner4=CreateSphere() : ScaleEntity corner4,0.1,0.1,0.1 : PositionEntity corner4,-1,1,1
EntityColor corner4,255,0,0 : EntityOrder corner4,-1
corner5=CreateSphere() : ScaleEntity corner5,0.1,0.1,0.1 : PositionEntity corner5,1,-1,-1
EntityColor corner5,255,0,0 : EntityOrder corner5,-1
corner6=CreateSphere() : ScaleEntity corner6,0.1,0.1,0.1 : PositionEntity corner6,1,-1,1
EntityColor corner6,255,0,0 : EntityOrder corner6,-1
corner7=CreateSphere() : ScaleEntity corner7,0.1,0.1,0.1 : PositionEntity corner7,1,1,-1
EntityColor corner7,255,0,0 : EntityOrder corner7,-1
corner8=CreateSphere() : ScaleEntity corner8,0.1,0.1,0.1 : PositionEntity corner8,1,1,1
EntityColor corner8,255,0,0 : EntityOrder corner8,-1

cube=CreateCube()
sphere=CreateSphere()
EntityColor sphere,0,0,255
EntityOrder sphere,-2

	RenderWorld()
	Flip
Delay 2000

While Not KeyHit(1)
	MoveEntity cam,0.1,0.01,0
	PointEntity cam,cube
	RenderWorld()
	Flip
Wend

Sir Gak

(Posted 2006) [#5]

Two. Origin is at 0,0,0.