Math Modifier 3D Studio plug-in

Math Modifier 3D Studio plug-in

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The ModiMath 3D Studio MAX 2.5 plug-in is a mesh modifier, which let you enter a custom expression to transform the mesh.

This plug-in is activated via the Modify tab. After installation it can be found under the More button.

How it works

You enter expressions for each of the x, y and z coordinates.
Press the Update button to let the plug-in parse the expression. The plug-in will give you an error message if it is not a valid expression.

The plug-in then compiles an expression tree, which is used to calculate the points in the mesh.

Scales from 0.0 to 1.0.
Use this to modify and animate the mesh.

The DX, DY and DZ are the actual x,y,z
values calculated.
Besides that you are allowed to have 3
temporary calculation expression: A, B and C.
You can use the result of A, B and C in 
the expressions for DX, DY and DZ by
using the A, B and C variables.

The plug-in knows the following operators:

+ - * / ( )
COS(x) SIN(x) TAN(x) EXP(x) LOG(x) LOG10(x)
ABS(x) SIGN(x) SQRT(x) RAND(65535)

A few predefined variables can also be used 
in the expression:

 x = The original mesh's x value
 y = The original mesh's y value
 z = The original mesh's z value
 percent = The percent value
 size = maximum size of bounding box
 time = the current animation position


This plug-in was inspired by the MathMAX plug-in, which is also based on custom expressions. MathMax does not seem to include a mesh modifier though. The MathMAX plug-in can be purchased from

The original code for this plug-in was the Spherify modifier from the MAX SDK. The sample expressions supplied with Math Modifier makes it behave just like Spherify.


Due to a hard-drive crash, I lost the source code for all my 3D Studio plug-ins. This included all my helper-classes. So after a few days of moarning I decided to quit developing 3D Studio plug-ins.

Installation Requirements

Kinetix 3D Studio MAX 2.5

Installation Guide

  • To install, copy MODIMATH.DLM to your \MAX\PLUGINS directory.

See Also

My SubTitle plug-in

Useful Links

Other free MAX Plug-ins.

Download Files  This software is free!

DownloadPlugin (14 Kb)

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