CameraViewport - why is cam height ineffective?

I'm finding the need to use CameraViewport for the first time. However, I find it somewhat erratic.

Why is camera height so ineffective (ie PositionEntity cam, 0,30,0)?

After much faffing about, I found more joy from CameraZoom. However, this seems to be a balancing act between the two.

I spotted the bentness when I decided to scale down the size of my entities. Low and behold everything was fine. However, I deem it should be just as easy to set the camera up (with my chosen entity scale) as it is to scale the entities down just to get a logical view.

I don't like it.

Why is the actual height of the camera virtually irellevent? I find it annoying.

 
Graphics3D 800,600,16,2

light=CreateLight()
PositionEntity light,100,100,-100

ground=CreatePlane()
EntityColor ground,0,200,0

worldcentre=CreateCube()
ScaleEntity worldcentre,.01,.01,.01;  Scaling this down is bent
PointEntity light,worldcentre

cam=CreateCamera()
CameraViewport cam,10,10,400,400
CameraProjMode cam,2
CameraZoom cam,.1
CameraRange cam,.01,1000

PositionEntity cam,0,1000,0 ; <- Bent!  I don't like it - 0,1,0 is the same as 0,1000,0
RotateEntity cam,90,0,0

Repeat

UpdateWorld()
RenderWorld()
Flip

Until KeyDown(1)=1 

I don't like it.

EDIT:
ps, I need ProjectMode 2 as with mode 1, my entities stretch.

Wait a minute!

The problem is caused by Project Mode 2 - "Sibly" designed it that way.

Sniff.

Right, I have sorted Mode 1 out.

CameraZoom 2 (or thereabouts) fixes the entity stretching.

Anyone know what the exact value should be? I'm not sure if 2 is right, but it looks okay.

The problem is - I need the Mode 2 Perspective.

This is really annoying. Would be great if there was a sort of combination mode.

The camera is an point in 3d space. It doesn't really have a height or width. Try scaleentity camera?

You either want perspective, or you don't.

You can alter the appearance of perspective by altering CameraZoom along with the distance the camera is from objects.

I want it both ways - as per my other thread.

The perspective option is great for picking an entity - but the non-perspective option is great for picking an exact point.

I want Mode 3.

Hmmm, what are you actually trying to do here? It's clear your both threads are linked, so can you fill us in a little, then maybe we can help you a little better :o)

As big10p says , just use mode 1 but position the camera far from the scene and use a high zoom to reduce the FOV. IMHO, ortho cameras in Blitz are useless and give you alot of z-order problems if you use them.

Stevie