topic Re: How to call SurroundsPoint(Point2 p) API function from maxscript in 3ds Max Programming Forum

How to call SurroundsPoint(Point2 p) API function from maxscript

gastonDTKNS — Thu, 19 Dec 2024 16:29:44 GMT

Hi everyone,

I'm trying to test splines intersections and "hollows" by using some functions from the api inside maxscript. This example is based on a code found on internet but I'm not able to call SurroundsPoint(Point2 p), apparently I'm not able to pass a point2 value to that function.

Can someone help me with this? thanks a lot

( g = (dotNetClass "Autodesk.Max.GlobalInterface").Instance inode = g.coreinterface7.getinodebyhandle $.inode.handle shp = ((inode.EvalWorldState (int currenttime) true).obj).shape_ splines = for i=0 to shp.SplineCount-1 collect shp.GetSpline i for i=1 to splines.count do ( format "isClockWise %\n" (splines[i].isClockWise) format "matID %\n" (splines[i].getMatID 1 ) --without parameters the function is recognized format "SurroundsPoint %\n" ( splines[i].SurroundsPoint ) --THIS GIVES AN ERROR --format "SurroundsPoint %\n" ( splines[i].SurroundsPoint [0,0] ) format "Spline % is self-intersecting: %\n" i (splines[i].SelfIntersects) for j=i+1 to splines.count where splines[i].IntersectsSpline splines[j] do ( format "Spline % intersects spline %\n" i j ) ) )

Re: How to call SurroundsPoint(Point2 p) API function from maxscript

MartinBeh — Fri, 20 Dec 2024 12:55:13 GMT

This seems to be incorrect?

shp = ((inode.EvalWorldState (int currenttime) true).obj).shape_

Re: How to call SurroundsPoint(Point2 p) API function from maxscript

gastonDTKNS — Fri, 20 Dec 2024 15:50:25 GMT

Honestly I don't know! I try to learn this kind of stuffs by comparing codes, I took this one from here
https://maxscriptbook.com/community/maxscript/Shape+Check%2C+or+finding+self+intersections+of+a+spline/

several functions from Spline3d class seems to work except for SurroundsPoint(Point2 p)

I can't find any reference to read about using this from maxscript, so I really appreciate any clue about what should I look at

Re: How to call SurroundsPoint(Point2 p) API function from maxscript

MartinBeh — Fri, 20 Dec 2024 17:27:31 GMT

OK, it looks like the .shape_ property is only available for some shape types. I found another forum thread on a similar topic: https://forums.autodesk.com/t5/3ds-max-programming/spline-normalize-2-extend-modifier-how-can-i-snapshot-as-spline/m-p/12833562/highlight/true#M32309 where Denis shows how to use MakeBezier to get the shape for a Line object.

With that, I was able to get your SurroundsPoint call working:

-- create a new Point2 value with coordinates [1,2] p = g.point2.create 1 2 -- shp is the current spline shp.SurroundsPoint p

I don't know whether this actually does what you need, but at least it now returns "false" instead of an error.

Hope this helps!

Re: How to call SurroundsPoint(Point2 p) API function from maxscript

gastonDTKNS — Fri, 20 Dec 2024 20:26:55 GMT

Great!!! that was the answer, you defined the point2 value inside the GlobalInterface instance, it is working in both cases, thanks a lot!

It is for nothing specific right now, I'm just trying to understand the concept of using the interface

( g = (dotNetClass "Autodesk.Max.GlobalInterface").Instance inode = g.coreinterface7.getinodebyhandle $.inode.handle shp = ((inode.EvalWorldState (int currenttime) true).obj).shape_ splines = for i=0 to shp.SplineCount-1 collect shp.GetSpline i p = g.point2.create 0 0 for i=1 to splines.count do ( format "isClockWise %\n" (splines[i].isClockWise) format "matID %\n" (splines[i].getMatID 1 ) --without parameters the function is recognized format "SurroundsPoint %\n" ( splines[i].SurroundsPoint ) --THIS GIVES AN ERROR --format "SurroundsPoint %\n" ( splines[i].SurroundsPoint [0,0] ) --SOLUTION, the point2 is defined inside the instance instead of passing it from maxscript format "SurroundsPoint %\n" ( splines[i].SurroundsPoint p ) format "Spline % is self-intersecting: %\n" i (splines[i].SelfIntersects) for j=i+1 to splines.count where splines[i].IntersectsSpline splines[j] do ( format "Spline % intersects spline %\n" i j ) ) )

Another doubt I have is if I should free those variables or maxscript does that automatically when they are inside a certain scope

Thanks again for your help

Re: How to call SurroundsPoint(Point2 p) API function from maxscript

MartinBeh — Sat, 21 Dec 2024 12:00:47 GMT

My expectation would be that both MAXScript and dotNet do their own garbage collection, so I don't think one has to "free" the variables. I might be wrong, though...