Integrate with AppCSXCAD

[thomaslepoix]

Fixes #34

Note

Controls on AppCSXCAD:

• Zoom: scroll
• Rotate in 3D: click + move
• Rotate in 2D: [CTRL]+ click + move
• Translate: [SHIFT]+ click + move
• Some controls only works in [3D] mode.
• [PP] mode (Parallel Projection, subset of 3D mode) is better suited to observe the mesh adequation to the structure

---

Trying instructions:

• Build OpenEMSH and the patched AppCSXCAD, and open an already meshed structure:

  nix develop '.#openems' --impure
  	nix develop
  		PATH=$PATH:`realpath build/src`
  
  		cmake -S . -B build
  		cmake --build build #-j
  
  		nixGL AppCSXCAD test/diagonal.csx

• Add a primitive: click on [Box], then set P1={ X=4, Y=4, Z=0 } and P2={ X=6, Y=6, Z=2 }.

• Observe that the new little cube is not correctly handled by the grid.

• Click on the button with the OpenEMSH icon, save as needed. Now AppCSXCAD should be greyed out and frozen.

• On OpenEMSH, observe the default mesh is right about the new cube.

• Enhance slightly the mesh by editing globally [E], then set Proximity limit from 1 to 0.1.

• Click on the button with the AppCSXCAD icon to preview the current structure.

• Observe AppCSXCAD in view mode does not show the buttons to add Properties and Primitives, nor the mesh related buttons (including the OpenEMSH one).

• Observe the difference on the mesh between the two AppCSXCAD windows.

• Close the preview AppCSXCAD window.

• Save [CTRL]+[S] and close the OpenEMSH window.

• Now the first AppCSXCAD window should be available again and have reloaded the file with the updated mesh.

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud