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Problems to align camera

by AIDan · in Torque X 3D · 05/14/2009 (4:15 pm) · 3 replies

I have a camera which derives from T3DCameraComponent.

I want my camera to look at the target _controlledObject.SceneGroup.Position.

SceneGroup.Rotation= Quaternion.CreateFromRotationMatrix( Matrix.CreateLookAt(SceneGroup.Position, _controlledObject.SceneGroup.Position, _controlledObject.SceneGroup.Transform.Up) );

When I try this I get really strange results and I wonder why it does not work. Any ideas?
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Torque Owner AIDan
#1
05/15/2009 (12:11 am)
It does not even work when I directly call SetTransform.

All the offsets are set to zero.

Strangely My camera focuses the object correctly at the beginning when I do the following:

SceneGroup.Rotation= Quaternion.CreateFromRotationMatrix( Matrix.CreateWorld(Vector3.Zero, Vector3.Cross(Vector3.Normalize(_controlledObject.SceneGroup.Position - SceneGroup.Position), Vector3.Right), Vector3.Up) );

I wonder why this Cross is required. Makes no sense to me but it works.

When I rotate the object my camera should keep looking at it which it still does not.

Torque Owner AIDan
#2
05/15/2009 (8:14 am)
It appears to me that the problem seems to be related to the different coordination system used by Torque. Does Torque has its own methods to create a rotation matrix?

Torque Owner AIDan
#3
05/17/2009 (10:07 am)
I finally got the look at stuff right by using MatrixUtil.CreateAimedTransform. But now I still have to set the up vector so the camera is always correctly aligned. Does anyone know where on the camera I can set that?