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labs:lightutilities [2015/09/14]
 labs:lightutilities [2020/08/14] (current)
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 +====== Light Utilities for V4.0 ======
 +> **Summary:** //This plug-in adds several light manipulation commands in a new menu to Rhino V4//
 +
 +=====Background=====
 +
 +Lights in Rhino do not allow a great deal of control for positioning. These utilities add some commands that you may find useful for this.
 +
 +There are some for rectangular lights (the plug-in calls them area lights for now) and some for spotlights.
 +
 +Rectangular lights are the most difficult to use in Rhino so this plug-in lets you make some special ones that have handles and some commands to manipulate the handles. See below.
 +
 +=====Downloads=====
 +
 +
 +  * [[http://wiki.mcneel.com/_media/legacy/en/Light_Utilities.zip|Download Rhino Light Utilities]]
 +Unzip to a convenient location, then drag and drop the Light_Utilities.rhp file onto a Rhino 4.0 window to install it.
 +
 +===== Commands=====
 +
 +
 +**AreaLightPlace** 
 +
 +  * Places a rectangular light with a target point and a source location. Default size is 10 by 10 units but you can enter anything you like (square) and change the size later using //AreaLightResize//.
 +
 +**AreaLightResize**
 +
 +  * Select the edge points on a rectangular light created by //AreaLightPlace// to resize the light from the center.
 +
 +**AreaLightOrient**
 +
 +  * Select the center point of a light created with //AreaLightPlace// to wobble it around its target point. The light source point is constrained to a sphere.
 +  * Select an edge point to swivel the light on its axis (center to target point).
 +  * Select the target point of the light to wobble it around the center of the rectangle.
 +
 +**AreaLightSlide**
 +
 +  * Select edge points of a light created with //AreaLightPlace// to slide it in the plane of the light.
 +  * Select the middle point of the light plane to slide it in and out from the target point on its axis.
 +
 +<color White> .</color>
 +
 +The above work only on lights made by the first command, //AreaLightPlace//.
 +
 +----
 +<color White> .</color>
 +
 +**SpotlightAngle**
 +
 +  * Sets the cone angle of one or more spotlights numerically.
 +
 +**SpotlightPivot**
 +
 +  * Wobble a spotlight around on its target point without changing the length of the light. The light source location is constrained to a sphere.
 +
 +**SpotlightSlide**
 +
 +  * Slide a light in and out along its axis.
 +
 +**SpotlightTarget**
 +
 +  * Aligns one or more spotlights to point at a user defined location.
 +
 +**SpotlightTargetObjects**
 +
 +  * Aligns one or more spotlights to point at the center of one or more object's bounding box centroid.
 +
 +=====Comments=====
 +
 +The AreaLight manipulation tools are very much a prototype and fairly fragile. Please be sure not to delete the points (handles) that are grouped with the lights.
 +
 +=====Feedback=====
 +
 +Please email <pascal@mcneel.com> with comments or questions.
 +
 +
  

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