P1 = Point(Math.PI/2, LaneSlope, LaneWidth) L1 = Link(P1, P2, "Paved")
The is an advanced authoring tool included with AutoCAD Civil 3D . It allows civil designers and engineers to create highly complex, custom corridor components without advanced programming knowledge. Subassembly Composer Autocad Civil 3d Tutorial Pdf
| Error in Civil 3D | Cause in Subassembly Composer | Solution | | :--- | :--- | :--- | | "Corridor baseline not found" | Missing Link codes or disconnected geometry. | Ensure all shape points are connected via AddGeometry > Link . | | "Invalid target surface" | You didn’t add a Surface Target Parameter . | Go to Target Parameters and add Surface . | | Subassembly appears upside down | Sign error in Y-axis (positive is up, negative is down). | Use -DitchDepth instead of +DitchDepth . | | Logic never triggers | Case sensitivity or wrong data type. | Ensure IncludeCheckDam is Yes/No, not Double. | P1 = Point(Math