A scene can include any number of camera objects, in which case the 'Current' attribute indicates the current active camera. The Current attribute can be animated so that the current camera may change during the animation.
The geometry of camera object is defined by four points.
The Center specifies the position for the camera. The Direction point defines the aim point for the camera. The focal axis can be derived from the two by subtracting the Position from the Direction point. Also the focusing distance, which is needed for the depth-of-field effect, is defined as the distance between the two points. The two other points, 'Up' and 'Side', define the opening angle for the view pyramid in both directions. The image aspect ratio, for example, can be derived from these geometry points.
The geometry can be skewed, in which case the film surface is no longer perpendicular to the focal axis.
Realsoft 3D supports both perspective cameras and orthographic cameras. This property is controlled via the 'Projection' attribute. Orthographic cameras are often used for modeling purposes, or to simulate distant cameras.
In addition to geometric attributes, a camera object defines many other attributes well known from their real counterparts.
Depth-of-field effect depends on the properties of the camera. The following attributes can be used for controlling it:
Depth Of Field - on/off
Focal Length - the focal length of the lens
Fstop - fstop value
Focusing Distance - the distance between the aim point and the position point.
In real world, the lens flare effect depends on the properties of the camera. This is also the case with Realsoft 3D. The lens flare effect is automatically generated according to the properties of the light sources and the camera. Camera object defines an attribute 'Lens Flare', which specifies the name of the lens flare post effect for the camera.
Perspective/Orthographic: The projection type of the camera.
Current: Selects the 'Current' camera, which is used in camera tracking and in file rendering.
Vertical Film: Activates a special film projection which keeps vertical lines parallel.
Flashlight: Defines the color and intensity of the camera flashlight.
Film sensitivity: Controls the overall brightness of images rendered using this camera. The higher the value, the more sensitive the film is, becoming more exposed so that the picture appears lighter.
Position: The location of the camera in 3D space.
View angle: The same as above, expressed as an angle value.
Scale: The same as above, expressed as inverse of width of the visible area at 1.0 meter distance. Useful in orthographic projection. The scale value describes how much the camera magnifies the image.
Type: A list of predefined camera aspect ratios.
Aspect ratio: The current image aspect ratio (height/width of visible area). Note: this value is independent of pixel resolutions and pixel aspect ratio. Set them separately for example in the File Rendrering window.
Film width and Height: Film size also controls the aspect ratio and affects depth of field.
Safe Width and Height: You can define a safe sub region using these controls. The safe region is part of camera wireframe and is used as a visual guide only (does not affect rendering). When tracking a camera view, you can use an appropriate safe region guide to verify that critical objects fit into the image area that is always visible. For example, borders of TV screens always hide part of the received image signal. (As a general rule, 0.9 is "safe motion", 0.8 is "Title safe".)
Lens flare: Activates automatic camera/light source lens flare effect. You can edit the properties of the flare from the post particle effects tab of the select window: activate the same effect there and open the property window.
Depth of Field: Activates camera defined depth of field effect. The DOF properties can be edited from the post image effects tab of the select window. Select the DOF effect that is used in the current post effect configuration and change its properties. Note: this setting is relevant only when the post effect configuration includes a DOF effect with the 'Camera Defined' option enabled.