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OnLight Method

IExport Context On Light Method

This method marks the beginning of export of a light which is enabled for rendering.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax 
void OnLight(
	LightNode node
)

Parameters

node LightNode
A node describing the light object.
Remarks
This method is only called for photo-rendering export (a custom exporter that implements IPhotoRenderContext ).
Example 
/// <summary>
/// This method is called for instances of lights
/// </summary>
/// <remarks>
/// The Light API can be used to get more information about each particular light
/// </remarks>
public void OnLight(LightNode node)
{
   // Obtain local transform data of the light object.
   Transform lightTrf = node.GetTransform();

   // Note: 1. If your light coordinate system differs from the one in REvit, 
   //   The light's local transform should be adjusted to reflect the difference.

   // Note 2. This local transform describes the light source position and light direction data.
   //   It means the "TiltAngle" property of a spot light has already been accounted for.

   // If a stack of transformation is maintained by the context object,
   // the current combined transform will be multiplied by the local transform.
   Transform lightWorldTrf = m_TransformationStack.Peek().Multiply(lightTrf);

}
See Also