6 modules - PI-VR GmbH

6 MODULESmeaning that the lines do not change when moving the camera (except whenusing the option “Use Camera View Vector” explained below).• Highlight Lines: Highlight lines mark spots on a surface whose extendedsurface normals intersect light lines (defined below). Highlight lines are viewindependentas well.• Reflection Lines: Reflection lines are reflections of light lines. This analysismode is view-dependent.» Both Highlight Lines and Reflection Lines need light lines to be defined as a kindof virtual light source. You can choose between two different basic shapes onwhich the light lines appear:• Longitudinal Lines on a Sphere: The lines are meridians on a sphere (linesfrom pole to pole) which encloses the scene and is of infinite size. The usercan set the axis of the sphere.• Parallel Linear Lines on a Plane: The lines are parallel straights on a plane.The user can set their position and rotation.» Define Light Source Depending on the chosen Analysis Mode the GUI changesin frame “Define Light Source”.198» For Isophotes:• Show Light Direction: Shows an arrow in the render view for the pickeddirection. It can be modified by using the rotation manipulator to rotate thearrow (does change the direction) and the translation manipulator to moveit (does not change the direction). Please note: The translation does not changethe direction of the light and therefore has no influence on the isophotes.• Direction: Offers the opportunity to enter values manually. Caution: The enteredvalues are automatically normalized if the direction manipulator is enabledvia “Show Light Direction”. If you want to enter X,Y,Z manually without normalization,please disable the manipulator.• Normalize: Normalizes the manually entered direction vector to length 1.• Set to Axis: Sets the direction to X (1, 0, 0), Y (0, 1, 0) or Z (0, 0, 1).