Lisp Surfaces Software 3d modeling

Lisp Surfaces is an application software development for autocad. Lisp Surfaces makes 3D modeling of the surface.
The surface modeling is an object 'edgesurf' of autocad. The grid vertexes are interpolated with a 3D point base. Lisp Surfaces makes an automatic interpolation of the surfaces.

Our product is targeted for hydraulic design and building companies and for topographic agencies using 3D modeling of surfaces.

Lisp Surfaces needs a database of 3D points as the matrix for grid interpolation.
Obviously an accurate 3D point base is requested to guarantee the quality of the results of the interpolation of the surfaces.
The interpolation formula used with Lisp surfaces is: Interpolation between weighted mean three-dimensional points, it needs always a selection of at least three points for calculating the elevation value for each of the grid’s vertexes.

Lisp surfaces application software development

is a development of the 'Edgesurf' Autocad object.

Lisp surfaces software help on line

This is a complete DEMO version of the Lisp surfaces that will provide a complete tool for you to evaluate the potential of the software.

The cost of a single-user license is 300 Euro VAT not included. For further information, contact us at…..

Make the download of Lisp surfaces here :

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Help on line

• Contents
• Installation guide
• User guide
• Download demo

Contents

Lisp surfaces - 3d modeling

Lisp surfaces uses an 'Edgesurf' grid to create a 3d modeling of the Autocad surfaces . The referential  base for the 3d modeling interpolation is a 3d points database.

The description of the commands that allow the creation of the 3d modeling are:

• Draw an 'Edgesurf' grid of autocad whit the settings of x and y axis.
• Settings of variously options ralative to: layer, kriging value etc.
• Start the interpolation and draw 3d modeling of the surfaces

Lisp Surfaces uses as interpolation method the "Interpolation between weighted mean three-dimensional points" formula.
The Lisp Surfaces is able to make about 10.000 grid vertex interpolations in 6 minutes (the drawing of 3d modeling surfaces included).

The Lisp Surfaces options are:

• selection of the layer for the 3D modeling surfaces drawing
• print all points of the 3D modeling grid on the selected layer (DTM - digital terrain model)
• setting of the radius selection value for the interpolation
• setting of the increment value of the selection radius to find the points (at least three) that are required for the interpolation
• setting the limit values for radius selection increment value
• layer report for all points of the 3D modeling grid that requires increment value of the radius selection
• setting of the kriging value for the interpolation

The quality of the interpolation is obviously related to the number of 3D points used for the creation of the 3D modeling grid.
For the setting of the radius selection value you must consider:

• the average distance of the 3D points used for the interpolation
• to choose a small value for the increment value of the radius selection
• to set a limit for the increment value for the radius of selection considering the max value of the radius

The settings of these three options (radius selections and others) will determine the quality of the interpolation vertex grid of the 3d modeling.
Lisp Surfaces uses the Interpolation between weighted mean three-dimensional points formula. With this method of interpolation all points selected (radius selection) are considered for the elevation value of each of the grid vertexes.
If you set a high value for the radius selection obviously the program will find more than the three points needed by the interpolation, but in this case, you will use more points which have a large distance to the vertex of the grid surfaces.
A large distance between the points selected for the interpolation vertex of the grid will give a low quality of the interpolation.

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Installation Giude

• Close AUTOCAD
• Decompress the file *.rar
• Execute the file install.exe.
• Select the personalized options in the HELP window

Installing the software includes also the addition of the menus in the predetermined AUTOCAD settings.

If it was not possible to install the menus automatically (autolisp development create personalize menu string) tthen, after having opening AUTOCAD use the commands listed below:

• _manuload
• select the folder ..\surface\utility for installing the software file plan_prof.mns
• select download and the enter
• Execute the command _options
• in the window "file" add to "Track for support file" select the track all the way to the folder  ..\plan_prof\utility (file plan_prof.mns and the icons of the menu lisp tools)
• save settings

Lisp surfaces tools

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Lisp surfaces software - 3d modeling

User Guide

• Create surface

• Interpolate surface

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Lisp Surfaces

Create surface

contents: this window allows to create the outlines for the grid of the 3d modeling

This window is the development of the'edgesurf' autocad command

syntax of the commands

• Create layer- selection of the layer for the grid surfaces. If selected this window will appear. The window asks for the name of the new layer for the grid surface.
• Select an existing layer to the surface - popup list of all layers in the current drawing. You must select one of the layers for your surface destination
• x axis value - allows the selection of the numbers of the grid vertexes on the x axis.
• y axis value - allows the selection of the numbers of the grid vertex on the y axis.
• Select corner outlines surface - picks two points for the outline surface.
• Draw surface - draws the surface into the selected layer.

development command

This is the development of the 'edgesurf' autocad command. In the original autocad version it requires four lines or curves with corresponding vertex and their manual selection.
The window "create surface" is an easier and quicker way to do the same.
You can also create a new layer for your surface object.

Lisp Surface

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Lisp Surfaces

Interpolation surface and create 3d modeling

contents: interpolates surface grids and creates 3D modeling

This window collects all the information about the 3D modeling surface

syntax of the commands

• Insert radius selection - insert the value for the selection radius of the points to be included in the interpolations (that results in the surface).
• Increasing value of the radius of selection - Increasing value of the radius of selection of the points to be included in the surface interpolations.
• Limits n increase value for the radius of selection - limits for the radius selection increment value. Such limit of increment automatically suspends the interpolation loop.
• Layer of the points for interpolation - this is the filter of the layers for the points. Lisp Surface finds in this selected layer all points for the surface interpolation.
• Draw interpolate surface points - for drawing, select the interpolated points of the grid (D.T.M. digital terrain model). if toggle is selected Lisp surface opens a new window. Here you can select the option about the existing layer for the D.T.M. interpolated points or create a new layer for D.T.M..
• Interpolate surface points - start - allows the selection of the surface previously created and after starting the 3d modeling surface to proceed to drawing.

development command

Lisp surfaces uses as interpolation formula the "Interpolation between weighted mean three-dimensional points". This method requires the selection of at least three points for the interpolation vertex.
For each vertex of the grid the radius selection finds the points for the interpolation. If Lisp Surface does not find at least three points for the interpolation of the vertex within the radius selection value then it will utilize the increment value of the radius.
The limit of the increment value of the radius of the selection is a control as to how much (n) increment of the radius may be added for the selection. When the limits of increment are reached then Lisp surface interrupts the interpolation loop and surface creation and reports the failed value into the layer.

The quality of the interpolation of the grid is controlled by the radius of the selection.
The radius selection finds the points to be included in the interpolation of the vertex and all points selected are processed into the interpolation. If Lisp Surfaces uses a high value for the radius selection also points that are more distant from the vertex will obviously be processed. In this case Lisp Surface returns a value elevation for the vertex that is less reliable.

When Lisp surface does not find, within the selected value of the radius, three points for interpolation it uses the increment value for the radius. Lisp surfaces then also creates a layer report on this specific case. The layer name is "out_radius_x" (x = progressive number).
The information printed for such points is:

• the point
• the increment value used for the interpolation

Note

If Lisp surfaces does not find at least three points required for the interpolation (in the radius selection value plus the increment value) the loop interpolation and the creation of the surface are interrupted.
In this case, Lisp surface prints the vertex in object into the layer "out_radius_x".

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Lisp Surfaces software makes 3D modeling of the surface.