Requirements:
- Windows 98,  XP, Vista, 7, 8, 10 or 11 (32 or 64 bits),
- computer administrator account.

Create  “C:\rcad” directory.
Unzip "rcad.zip" in this directory.

On Windows 98 and XP:
  "Right mouse on desktop", "Properties", "Appearance" ("Advanced" on XP), "Item"->"Active Window Border", "Size"->1, "Apply", "Item"->"Inactive Window Border", "Size"->1, "Apply", "OK".

On Windows Vista:
 Change "Border Padding",  "Active Window Border" and "Inactive Window Border": "right mouse on desktop", "Personalize",  "Window Color and Appearance", "Advanced",  "Item"->"Border Padding", "Size"->0, "Item"->"Active Window Border", "Size"->1", "Item"->"Inactive Window Border", "Size"->1, "OK".

On Windows 7:
 Change "Border Padding",  "Active Window Border" and "Inactive Window Border": "right mouse on desktop", "Personalize",  "Window Color",  "Item"->"Border Padding", "Size"->0, "Apply", "Item"->"Active Window Border", "Size"->1, "Apply", "Item"->"Inactive Window Border", "Size"->1, "Apply", "OK".

On Windows 8:
  1) run the program as an administrator: right mouse on  "c:\rcad\rcad.exe", "Compatibility", "Run this program as an administrator",
  2) set "BorderWidth" and "PaddedBorderWidth" to 0, using Registry Editor (Regedit command): "Run" command (move your mouse to the upper right corner until the "Charms Bar" pops out., select "Apps" from the list and type “run” in the search box; click on "Run" from the search results), in Regedit select HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics, set BorderWidth 0 (by double-clicking) and PaddedBorderWidth 0, restart the computer; If you have trouble moving the RCAD toolbars, set values between -15 and -60 instead of 0 (values must be negative).

On Windows 10/11:
  1) run the program as an administrator: right mouse on  "c:\rcad\rcad.exe", "Properties", "Advanced", "Run as administrator",
  2) set "BorderWidth" and "PaddedBorderWidth" to 0, using Registry Editor (Regedit command): in Search (in the lower-left of the desktop, next to the Start button), type Regedit, and then select Registry Editor; in Regedit select HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics, set BorderWidth 0 (by double-clicking) and PaddedBorderWidth 0, restart the computer; If you have trouble moving the RCAD toolbars, set values between -15 and -60 instead of 0 (values must be negative);
If everything appears too small on high resolution displays, press the right mouse button on C:\rcad\RCAD.EXE, Compatibility and uncheck "Disable display scaling on high DPI setings".
  3) to see the Help: in File Explorer, right click on the "C:\rcad\rcad.chm" file, Properties, check Unblock (in the Attributes section).

Run RCAD.EXE.

The shareware version runs only 10 times, you can't print or save DXF files, you can import or export only 5000 points or triangles in LandXML files and in Hydrology you cannot set any values for Line_step and time_Increment, and from the 4D files, you can only see 66%!

--------------------Settings problems------------------

If the graphics card has not OpenGL or the OpenGL drivers are not installed, the image may be upside down or can remain traces on the screen, when you move the mouse.
Similar effects can occur if the color depth is not 32-bit.
If you don't set the Window Border and Border Padding to 1 and 0, the toolbars appear incomplete or distorted.
If you don't run the program  from a Windows administrator account or as an administrator (Windows 8), the program exits with an error message (privilege violation or the trial version is expired).
If you can not see the Help, find the solution, by searching in Google "can not see chm files in Windows".

--------------------RTOPO testing-----------------------

Choose from menu or toolbar:
 RTOPO
  Load points "c:\rcad\Load points example.TXT"
  Intermediary points
  Triangulation
  Isolines
  Sections
  Edit points
  Settings
  Redraw points
  Intermediary points
  Triangulation
     draw a PLine entity
     make Fillet on PLine entity
  Projection
     select PLine

-----------------Hydrology Testing-----------------

Choose from menu or toolbar:
  File, DXFIN "c:\rcad\hidrology example.dxf"
  RTOPO, Projection
  Enter
  O 3
  Enter
  3DOrbit (left mouse key pressed and mouse movement), Zoom (mouse wheel rotation), Pan (mouse wheel press and mouse movement)
  RTOPO, Load Points, "c:\rcad\hidrology example 2000 500 1 30 200 60000 60000 59800 hidro_4dh.txt" and then
                      "c:\rcad\hidrology example 2000 500 1 30 200 60000 60000 59800 hidro_4dv.txt 
  uncheck Flat Shaded in VIEW TOOLBAR
  3DOrbit, Zoom, Pan

-----------------VDAF and 3D CNC testing--------------

  VDafsin "c:\rcad\VDA_FILE.VDA"        
  Settings
  Generate NC file
  Settings, Cancel
  Load NC file
