Sketch.createAutoConstrainInput Method

Parent Object: Sketch
Defined in namespace "adsk::fusion" and the header file is <Fusion/Sketch/Sketch.h>

Description

Creates a new AutoConstrainInput object associated with this sketch. The input object is used to define the various options when adding dimension and geometric constraints to help constrain a sketch. The returned object has all options defined with default values and additional constraints can be applied by passing this into the autoConstrain method.

Syntax

"sketch_var" is a variable referencing a Sketch object.

returnValue = sketch_var.createAutoConstrainInput()
"sketch_var" is a variable referencing a Sketch object.

#include <Fusion/Sketch/Sketch.h>

returnValue = sketch_var->createAutoConstrainInput();
"sketch_var" is a variable referencing a Sketch object.

returnValue = sketch_var.createAutoConstrainInput();

Return Value

Type Description
AutoConstrainInput Returns the newly created AutoConstrainInput object. Validation of sketch suitability (entity count, entitlements, fully constrained status, 3D vs 2D, etc.) is performed when the autoConstrain method is called, not during input creation.

Samples

Name Description
AutoConstrain Sample Demonstrates using the AutoConstrain API to automatically add geometric constraints and dimensions to a sketch. This sample creates a simple sketch with a rectangle and circle, then applies automatic constraints using the origin point as a datum.

Version

Introduced in version January 2026