API Reference > imodeljs-common > Symbology > ThematicDisplay > axis axis Readonly axis: Vector3d For ThematicDisplayMode.Height, this is the axis along which to apply the thematic gradient in the scene. For ThematicDisplayMode.Slope, the slope of a surface is calculated in relation to this axis. Defaults to {0,0,0}. Defined in core/common/src/ThematicDisplay.ts Line 420 Last Updated: 11 June, 2024