API Reference › core-common› Symbology

Symbology

Types that define the appearance of geometry.

Classes

Name Description  
ColorDef An immutable integer representation of a color.  
Contour Describes how to generate and style contour lines for geometry within a single ContourGroup.  
ContourDisplay Settings that specify how to apply contour lines to groups of geometry  
ContourGroup Defines a group of objects to which to apply Contour lines in a particular style.  
ContourStyle The style settings used by either a minor or major contour.  
FontMap A FontMap holds the set of font names available in an iModel. Deprecated
GeometryParams Describes the display properties of graphics in a persistent element's GeometryStream that aren't inherited from SubCategoryAppearance.  
GraphicParams The "cooked" material and symbology for a RenderGraphic.  
HSLColor An immutable color defined by Hue, Saturation, and Lightness.  
HSVColor An immutable color defined by Hue, Saturation, and Value  
RgbColor An immutable representation of a color with red, green, and blue components each in the integer range [0, 255].  
SubCategoryAppearance Parameters that define the way geometry on a SubCategory appears.  
ThematicDisplay The thematic display setup of a DisplayStyle3d.  
ThematicDisplaySensor A sensor in world space, used for InverseDistanceWeightedSensors.  
ThematicDisplaySensorSettings Settings for sensor-based thematic display for InverseDistanceWeightedSensors.  
ThematicGradientSettings Thematic settings specific to creating a color gradient used by ThematicDisplay.  

Constants

Name Description  
ColorByName A set of known colors by HTML color name, as a 32-bit integer in the form 0xBBGGRR (red is the low byte).  

Enumerations

Name Description  
BackgroundFill Describes how a view's background color affects the interior area of a closed region.  
FillDisplay Whether a closed region should be drawn for wireframe display with its internal area filled or not.  
FillFlags Flags indicating whether and how the interiors of closed planar regions is displayed within a view.  
FontType The FontFile encodings understood by iTwin.js.  
GeometryClass Categorizes a piece of geometry within a GeometryStream.  
HSVConstants  
LinePixels Enumerates the available patterns for drawing patterned lines.  
ThematicDisplayMode The thematic display mode.  
ThematicGradientColorScheme A color scheme used to generate the colors of a thematic gradient within an applied range.  
ThematicGradientMode A thematic gradient mode used to generate and apply a thematic effect to a scene.  
ThematicGradientTransparencyMode Describes how transparency is computed when applying a thematic gradient to a surface.  

Interfaces

Name Description  
ContourDisplayProps JSON representation of ContourDisplay settings.  
ContourGroupProps JSON representation of a ContourGroup.  
ContourProps JSON representation of a Contour.  
ContourStyleProps JSON representation of a ContourStyle.  
FontFace A specific variation of the glyphs defined by a font family.  
FontFamilyDescriptor Uniquely describes one or more FontFaces sharing the same name and type comprising a single font family.  
FontFamilySelector A FontFamilyDescriptor in which the FontType is optional, used when querying FontIds via IModelDbFonts.findId.  
FontMapProps The properties of a FontMap Deprecated
FontProps Represents a FontFamilyDescriptor stored in an iModel with a unique numeric Id.  
RgbColorProps JSON representation of an RgbColor, with each component an integer in the range [0, 255].  
ThematicDisplayProps JSON representation of the thematic display setup of a DisplayStyle3d.  
ThematicDisplaySensorProps JSON representation of a ThematicDisplaySensor.  
ThematicDisplaySensorSettingsProps JSON representation of a ThematicDisplaySensorSettings for InverseDistanceWeightedSensors.  
ThematicGradientSettingsProps JSON representation of a ThematicGradientSettings.  

Namespaces

Name Description  
AreaPattern  
Gradient Namespace containing types for defining a color gradient, often used for filled planar regions.  
LineStyle  
SubCategoryAppearance  

Type Aliases

Name Description  
ColorDefProps The JSON representation of a ColorDef - an unsigned 32-bit integer in 0xTTBBGGRR format.  
ContourDisplayProperties A type containing all of the properties of ContourDisplay with none of the methods and with the readonly modifiers removed.  
ContourGroupProperties A type containing all of the properties of ContourGroup with none of the methods and with the readonly modifiers removed.  
ContourProperties A type containing all of the properties of Contour with none of the methods and with the readonly modifiers removed.  
ContourStyleProperties A type containing all of the properties of ContourStyle with none of the methods and with the readonly modifiers removed.  
FontId An unsigned integer uniquely identifying a font family in the context of an IModel.  

Last Updated: 01 October, 2025