Understanding units in AutoCAD
Thursday, May 21, 2026Metric or imperial, layout units, block insertion units: an overview of the system variables that govern units in AutoCAD.
Read moreTag: CAD
Articles with the tag "CAD".
Blog Posts
Comments in AutoLISP
Tuesday, January 27, 2026Managing Configuration Files in AutoLISP
Monday, March 16, 2026Localization with AutoLISP
Tuesday, January 27, 2026AutoLISP with VS Code
Sunday, January 25, 2026Developing AutoLISP macros with VS Code
Read moreConfiguring Vault with Inventor
Saturday, April 11, 2026Configuring Vault to work with Inventor is a bit harder than you might think.
Read moreAdding Custom System Variables to AutoCAD
Tuesday, August 26, 2025How to create and manage custom system variables in AutoCAD.
Read moreGeometry Library in C# — Composite Curves
Saturday, April 4, 2026How to join segments, arcs, and NURBS end to end to form contours and polylines.
Read moreGeometry Library in C# — Intersections
Saturday, April 4, 2026How to model intersection results between curves: crossings, tangencies, overlaps, and lazy computation of expensive information.
Read moreGeometry Library in C# — NURBS Curves
Saturday, April 4, 2026How NURBS curves fit into our interface hierarchy: control points, knot vectors, evaluation, and trimming.
Read moreExport and import iLogic rules
Wednesday, March 4, 2026Put your iLogic rules under version control and edit them in a modern editor with two export/import scripts.
Read more0x80004005: the materials library that won't open
Friday, May 22, 2026A concrete case of the infamous E_FAIL: an .adsklib file that does exist on disk, yet which Inventor stubbornly refuses to open.
Read moreUnderstanding the Role of Points in Inventor Sketches
Monday, March 30, 2026In an Inventor sketch, every entity relies on points. Understanding their role is essential to mastering geometric constraints.
Read morePreview DWG and DXF Files with QuickLook
Friday, March 13, 2026Install QuickLook and its CADImport plugin to preview CAD files directly from Windows Explorer, without opening AutoCAD.
Read moreRevit DB Link: Export Model Data to a Database
Wednesday, March 18, 2026Vault Data API
Wednesday, February 25, 2026Interact with Vault server data through a REST API
Read moreVault Server Installation Issue (Hard Drive Sector Size)
Wednesday, November 12, 2025SQL Server fails to install on an NVMe drive with sector sizes greater than 4096 bytes.
Read moreVLX Namespaces
Tuesday, March 17, 2026Geometry Library in C# — Intersections in 3D
Sunday, April 5, 2026How to transpose intersection algorithms to 3D: line/sphere, line/circle in space, coplanarity, and projection into the circle's plane.
Read moreGeometry Library in C# — Circle / Circle Intersection
Sunday, April 5, 2026How to find the intersections of two circles (or arcs) in 2D using the radical line, and handle all special cases: tangency, concentricity, overlap.
Read moreGeometry Library in C# — Line / Circle Intersection
Sunday, April 5, 2026How to compute intersections between a line (or segment) and a circle (or arc): substitution into the circle equation, discriminant, and parametric filtering.
Read moreGeometry Library in C# — Numerical Curve Intersection in 3D
Sunday, April 5, 2026When the analytical approach isn't enough: coarse search by subdivision, Newton's method refinement, and tolerance handling for arbitrary curves in space.
Read moreGeometry Library in C# — Segment / Segment Intersection
Sunday, April 5, 2026How to find the intersection point of two 2D segments: setting up the equations, solving with the cross product, handling parallel cases and overlaps.
Read moreQuestions & Answers
What is AutoLISP?
Updated: Thursday, January 15, 2026AutoLISP is a programming language built into AutoCAD, derived from the LISP language, allowing users to automate tasks and customize the CAD software.
Read answerHow to do a 3D rotation in AutoCAD?
Updated: Monday, January 12, 2026How to do a 3D rotation in AutoCAD.
Read answerHow to find the intersection between a line and a plane in AutoCAD?
Updated: Monday, January 12, 2026How to find the intersection between a line and a plane in AutoCAD?
Read answerHow to determine if a point is inside a contour?
Updated: Saturday, November 15, 2025How to determine if a point is inside a contour in AutoCAD.
Read answerWhat are the different standardization organizations found in Inventor's Content Center?
Updated: Friday, September 5, 2025Here is a list of the main standardization organizations with their acronym, full name, and country or region.
Read answerWhat is iLogic?
Updated: Tuesday, August 19, 2025iLogic is a rule system integrated into Autodesk Inventor that allows design automation and the creation of intelligent, parametric 3D models.
Read answerWhat is APS?
Updated: Monday, January 1, 0001What is Autodesk Platform Services used for?
Read answer
contact@wiip.fr
(+33) 6 46 40 75 66
8 rue du bocage, 62910 SERQUES (France)