Modeling Tools Internals

Create Shapes

Shapes commands are registered via REGISTER_MODELING_TOOL_COMMAND as FUICommandInfo.

When you click to create a shape, UAddPrimitiveToolBuilder::BuildTool is called. This will create a new subclass object of UAddPrimitiveTool (for example UAddTorusPrimitiveTool is used for a Torus shape).

The manager will then call UInteractiveTool::Setup.

UAddPrimitiveTool::GenerateMesh is used to generate the actual mesh the tool is building.