An abstract base object for all lens objects. Lens objects provides a projection matrix that transforms 3D geometry to normalized homogeneous coordinates.

Subobjects: FreeMatrixLens, ObliqueNearPlaneLens, OrthographicLens, OrthographicOffCenterLens, PerspectiveLens, PerspectiveOffCenterLens


Inherited from EventDispatcher.


Created LensBase object has properties:

far

The distance to the far plane of the frustum. Float

frustumCorners

Retrieves the corner points of the lens frustum. Vector array of Floats

matrix

The projection matrix that transforms 3D geometry to normalized homogeneous coordinates. (Matrix3D)

near

The distance to the near plane of the frustum. Float

unprojectionMatrix

[read-only] (Matrix3D)


methods:

clone()

Creates an exact duplicate of the lens

project(point3d)

Calculates the normalised position in screen space of the given scene position relative to the camera. (Vector3D)

point3d - the position vector of the scene coordinates to be projected. (Vector3D)

unproject(nX, nY, sZ)

Calculates the scene position relative to the camera of the given normalized coordinates in screen space.(Vector3D)

nX - The normalised x coordinate in screen space, -1 corresponds to the left edge of the viewport, 1 to the right. Float

nY - The normalised y coordinate in screen space, -1 corresponds to the top edge of the viewport, 1 to the bottom. Float

sZ - The z coordinate in screen space, representing the distance into the screen. Float

Created with the Personal Edition of HelpNDoc: Create help files for the Qt Help Framework