I'm puzzled by the usage of Ogre::Camera in Demo_BezierPatch

[panyy]

the Demo uses Camera like this:
mCamera->setPosition(500,500, 1500);
mCamera->lookAt(0,200,-300);

the Demo works well,but I wonder where is the 'UP' vector?
and I can't find any function in OgreCamera.h that set the 'UP' vector,is this a bug or something?

I'm not familiar with Ogre,but how can Ogre setup Camera without UP vector???
can anyone answer my question,best regards!

[Raven]

but I wonder where is the 'UP' vector?

What do you mean by the 'UP' Vector

Are you talking about Orientation?

[haffax]

Camera::setUp() is not missing, it is just not there. Just use setOrientation() to set up and right vector (indirectly). In Ogre Camera is set up the way, that in its local coordinate system -z is the look at direction, +y is up and +x is right. Use setOrientation() to orient the camera in worldspace.

[panyy]

for half day's work,I just finished my first Ogre Project,It's simple - only a ManualMesh in it,but I have learnt something like Ogre's Unique Camera ^_^,Mesh and SubMesh,etc.very happy,thanks for your help.

it's me,another question:
can I render a MunualMesh without IndexBuffer,say can I use OT_TRIANGLE_STRIP or OT_TRIANGLE_FAN?

[haffax]

Afaik you can't, but you can subclass SimpleRenderable for better control of the RenderOperation and here you can use only a vertex buffer and operation types of your choice.