History: -Camera

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__Camera__ - A viewpoint from which the scene will be rendered.

OGRE renders scenes from a camera viewpoint into a buffer of some sort, normally a window or a ((texture)) (a subclass of ((RenderTarget))). OGRE cameras support both perspective projection (the default, meaning objects get smaller the further away they are) and orthographic projection (blueprint-style, no decrease in size with distance). Each camera carries with it a style of rendering, e.g. full textured, flat shaded, wireframe), field of view, rendering distances etc., allowing you to use OGRE to create complex multi-window views if required. In addition, more than one camera can point at a single render target if required, each rendering to a subset of the target, allowing split screen and picture-in-picture views.

Cameras maintain their own aspect ratios, field of view, and frustum, and project coordinates into a space measured from -1 to 1 in X and Y, and 0 to 1 in Z. At render time, the camera will be rendering to a viewport which will translate these parametric co-ordinates into real screen coordinates. Obviously it is advisable that the viewport has the same aspect ratio as the camera to avoid distortion (unless you want it!).

Note that a Camera can be attached to a ((-SceneNode)), using the method ''SceneNode::attachObject()''. If this is done the Camera will combine it's own position/orientation settings with it's parent ((-SceneNode)). This is useful for implementing more complex Camera / object relationships i.e. having a camera attached to a world object.

!!See also
* [http://www.ogre3d.org/docs/api/html/classOgre_1_1Camera.html|Ogre::Camera Class Reference]

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