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Use of this software is subject to the terms of the Autodesk license agreement provided at the time of installation or download, or which otherwise accompanies this software in either electronic or hard copy form.

The polysamp application demonstrates several things:

• How to implement a custom entity class (polyobj project).

• How transactions work (polyui project).

• How to use the AcDbEntity::highlight() and AcDbEntity::unHighlight()

• How to implement AcDbAssocPersSubentIdPE for a custom entity. This protocol extention reveals subentities of the entity to the Associative Framework. When the entity exposes this protocol extension, it can participate in associative relations represented by the Associative Framework, such as geometric and dimensional constraints can be created between the custom entities and other entities in the drawing.

• How to implement AcDbAssocPersSubentIdPE::createNewPersSubent() so that the returned AcDbAssocPersSubentId persistently identifies the subentity of the custom entity. When the topology of the entity changes (number of sides changes), AcDbAssocPersSubentIdPE::getTransientSubentIds() takes the AcDbAssocPersSubentId and returns a "corresponding" subentity in the current state of the entity.

• How to make a custom entity constrainable by using a general and reusable ConstrainedRigidEntityAssocPersSubentIdPE class that handles the case when the constrained custom entity changes shape during dragging.

• How to allow associative dimensions on a custom entity by the custom entity exposing AcDbAssocPersSubentIdPE.

git clone https://github.com/MadhukarMoogala/adskpoly.git
cd  adskpoly
start notepad asdkpoly.vcxproj
change <ObjectARXPath>D:\Work\ObjectARX20$(ArxVersion)</ObjectARXPath> to your SDK path
devenv asdkpoly.vcxproj
msbuild /t:build /p:Configuration=Debug;Platform=x64 asdkpoly.vcxproj