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LightSourcePropertyValues Property (IModelDoc2)

Gets and sets the light source property values.

.NET Syntax

Visual Basic (Declaration) 
Property LightSourcePropertyValues( _
   ByVal ID As System.Integer _
) As System.Object
Visual Basic (Usage) 
Dim instance As IModelDoc2
Dim ID As System.Integer
Dim value As System.Object
instance.LightSourcePropertyValues(ID) = value
value = instance.LightSourcePropertyValues(ID)
System.object LightSourcePropertyValues( 
   System.int ID
) {get; set;}
property System.Object^ LightSourcePropertyValues {
   System.Object^ get(System.int ID);
   void set (System.int ID, System.Object^ value);



Light source ID

Property Value

Array of 19 doubles containing the light source properties (see Remarks)



The light source ID ranges from 0 to n, where n = (the total number of light sources - 1). To get the total number of light sources, use IModelDoc2::GetLightSourceCount.

The return values for this property is the following array of 19 doubles:

[ type, Intensity, Color[3], Position[3], Direction[3], coneAngle, falloff[3], Ambient, Specular, isDisabled, SpotExponent ]



  • type =  an integer packed into a double that represents the light source type where valid types are taken from openGL definitions (LIGHT_EYE, LIGHT_AMBIENT, LIGHT_SPOT, LIGHT_POINT, LIGHT_DISTANT)

  • Intensity = Light-source intensity (diffuseness) where values range from 0 to 1.

  • Color[3] =  Light-source color in the form of an array of 3 doubles (R, G, B) where values range from 0 to 1.

  • Position[3] =  Light-source position for spot lights in the form of an array of 3 doubles (X, Y, Z) in model space.

  • Direction[3] = Light-source direction in the form of an array of 3 doubles (i, j, k)

  • coneAngle = Light-source cone half angle in degrees where valid values are from 0 to 90 and 180.

  • falloff[3] =  Light-source falloff in the form of an array of 3 doubles (Kc, Kl, Kq). These values result in changes in light intensity as the distance between the light position and the vertex change.

    NOTE: The falloff[3] values are not supported in SOLIDWORKS 2011 and later.

    The result is driven by the following equation:

 [ 1 / (Kc + D*Kl + D*D*Kq ) ]


D =  the distance.between the light's position and the vertex

Kc = constant attenuation

Kl = linear attenuation

Kq = quadratic attenuation

  • Ambient = light-source ambient Intensity

  • Specular = light-source specular Intensity

  • isDisabled = an integer packed into a double. True means that the light is disabled and false means the light is not disabled.

  • SpotExponent = spot exponent

    NOTE: The SpotExponent value is not supported in SOLIDWORKS 2011 and later.

See Also


SOLIDWORKS 2001Plus FCS, Revision Number 10.0

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