Trisolation delete invalid triangles graphically
This function allows you to graphically select the trisolation which is to be analysed for invalid triangles. Invalid triangles are those triangles which are either attached to invalid edges or self-intersecting. An edge becomes invalid when more than two triangles share the same edge. Selection of the trisolation will display the Delete invalid triangles form.
To run this function: Choose Solids > Edit trisolation > Delete invalid triangles graphically, or...
Delete invalid triangles form
Layer name
Display only. The name of the active layer is displayed. The active layer is the only layer from which you can delete invalid triangles.
Object number
Display only. This is the object number which has been selected in the graphics window.
Trisolation number
Display only. This is the trisolation number which has been selected in the graphics window.
Delete invalid triangles
- Delete triangles attached to invalid edges
Select this option when triangles attached to invalid edges are to be deleted. For a trisolation to be considered valid no more than 2 triangles are permitted to share a common edge. If more than 2 triangles share an edge then all of them will be deleted. - Delete self intersecting triangles
Select this option to delete self intersecting triangles. Note : Invalid edges must be removed before deleting self intersecting triangles.
Colour
Enter the colour to highlight invalid edges or self intersecting triangles in a trisolation.
Display invalid triangles
Press this button to display the sides of the triangles attached to invalid edges or self intersecting triangles.
Number of triangles
Display only. This shows the number of triangles attached to invalid edges or self intersecting triangles.