[LDPE] 1.8.86 Released (CSG Sphere / CSG bugfix)

[Nils Schmidt]

Hey,

the new sphere from LDView is now used for LDPartEditor's CSG logic.
Here you see a CSG example:

Code:

0 BFC CERTIFY CCW

0 !LPE CSG_QUALITY 16

0 // SYNTAX 1 0 !LPE [CSG FORM] [ID] [COLOUR] [MATRIX]
0 !LPE CSG_CUBOID    a  4 0 0 0 1 0 0 0 1 0 0 0 1
0 !LPE CSG_ELLIPSOID b  1 0 0 0 1.35 0 0 0 1.35 0 0 0 1.35

0 !LPE CSG_CYLINDER  c  2 0 -1 0 .7 0 0 0 2 0 0 0 .7
0 !LPE CSG_CYLINDER  d  2 -1 0 0 0 2 0 .7 0 0 0 0 .7
0 !LPE CSG_CYLINDER  e  2 0 0 -1 .7 0 0 0 0 .7 0 2 0

0 // SYNTAX 2 0 !LPE [CSG FUNCTION] [ID] [ID2] [ID3]

0 !LPE CSG_UNION c d d
0 !LPE CSG_UNION d e d
0 !LPE CSG_INTERSECTION a b f
0 !LPE CSG_DIFFERENCE f d f

0 // SYNTAX 3 0 !LPE CSG_COMPILE [ID]
0 // Inline the following line to get the triangles from the CSG object "f"
0 !LPE CSG_COMPILE f

As always, you can download LDPE from this page:

http://nilsschmidt1337.github.io/ldparteditor/

Changelog:

(2 new features and 1 bug fix)

With this release you will be able to...

• ...use the sphere mesh from LDView for CSG operations, too (!LPE CSG_ELLIPSOID).
  
• ...adjust a unification threshold for the CSG optimizer (0 !LPE CSG_UNIFY_EPSILON 0.1).
  

The following critical issue is fixed:

1. !LPE CSG_UNION "consumed" a few triangles. Other triangle defects could still occur, but only with very complex union intersections.
   

The program was tested intensively with "real world" files.
However, something can go wrong in about 140.000 lines of code.

Installation on Windows:

1. Download and extract LDPartEditor_win32_x64.zip
   
2. Run LDPartEditor-1.8.86.msi
   
3. Start LDPartEditor from the start menu
   

Installation on Linux:

1. Download and extract LDPartEditor_linux_x64.zip
   
2. Install ldparteditor_1.8.86-1_amd64.deb
   
3. Start LDPartEditor from the menu or via launcher
   

Installation on Mac OS X:

1. Download and extract LDPartEditor_mac_x64.zip
   
2. Mount LDPartEditor-1.8.86.dmg
   
3. Drag LDPartEditor.app to the Applications folder
   
4. Copy ldparteditor.sh to your home folder
       4a. Open a Terminal.app and run ./ldparteditor.sh
       4b. Or open a Terminal.app and run /Applications/LDPartEditor.app/Contents/MacOS/LDPartEditor
   

I listen carefully to your requests and possible complaints. Please leave me a message, with your thoughts and wishes to further improve the software.

LDPE is a 3D CAD application: The overall system requirements are higher. While I recommend to use a powerful 64-bit multicore system, it could be possible, to run LDPE on older machines as well.

System Requirements:

Minimum System Requirements:

• OpenGL 2.1 compatible Graphics Card
  
• Operating System (64-bit): Windows [7 or newer], Linux [e.g. Ubuntu Linux >=14.4], Mac OS X [>=10.6]
  
• CPU: Multicore-Processor e.g. Intel Core 2 Duo or AMD Athlon II (>2.0Ghz)
  
• RAM: 4GB
  
• Video-Memory: 1 GB
  
• Free Disk Space: 150 MB
  

Recommended Requirements:

• Operating System (64bit): Windows 7,8,10,11, Linux [e.g. Ubuntu Linux >=14.4], Mac OS X [>=10.6]
  
• OpenGL 3.3 compatible Graphics Card
  
• CPU: Multicore-Processor with 4 cores (or more)
  
• RAM: >4 GB
  
• Video-Memory: >1 GB
  
• Free Disk Space: 500 MB
  
• For a faster start, LDPartEditor and the LDraw™ library should be installed on an SSD.