PDT: Modify Fillet functionality

This enables two non-connected edges to be filleted. The Process starts with an
intersection of the two edges, then fillets the corner according to input values
in the UI. This option is selected by setting the Int/Fillet checkbox.

The command Line version now takes the `fi...` format to intersect first. e.g.

`fi1.1,6,0.05` performs an intersected fillet of 1.6 units radius, 6 segments,
concave profile.

1 files changed, 32 insertions, 4 deletions

diff --git a/precision_drawing_tools/pdt_command.py b/precision_drawing_tools/pdt_command.py
index b293dc0d..4206b199 100644
--- a/precision_drawing_tools/pdt_command.py
+++ b/precision_drawing_tools/pdt_command.py
@@ -30,6 +30,7 @@ from .pdt_functions import (
     debug,
     disAng,
     getPercent,
+    intersection,
     objCheck,
     oops,
     updateSel,
@@ -86,6 +87,7 @@ def pdt_help(self, context):
     label(text="- Fillet Options:")
     label(text="v: Fillet Vertices")
     label(text="e: Fillet Edges")
+    label(text="i: Fillet & Intersect 2 Disconnected Edges")
     label(text="- Math Options:")
     label(text="x, y, z: Send result to X, Y and Z input fields in PDT Design")
     label(text="d, a, p: Send result to Distance, Angle or Percent input field in PDT Design")
@@ -226,9 +228,9 @@ def command_run(self, context):
         elif mode == "o":
             pg.mathsout = num
         return
-    # "x"/"y"/"z" modes are only legal for Math Operation
+    # "o"/"x"/"y"/"z" modes are only legal for Math Operation
     else:
-        if mode in {"x", "y", "z"}:
+        if mode in {"o", "x", "y", "z"}:
             pg.error = PDT_ERR_BADCOORDL
             context.window_manager.popup_menu(oops, title="Error", icon="ERROR")
             return
@@ -855,7 +857,7 @@ def command_run(self, context):
     # ---------------
     # Fillet Geometry
     elif oper == "F":
-        if mode not in {"v", "e"}:
+        if mode not in {"v", "e", "i"}:
             pg.error = f"'{mode}' {PDT_ERR_NON_VALID} '{oper}'"
             context.window_manager.popup_menu(oops, title="Error", icon="ERROR")
             return
@@ -871,7 +873,7 @@ def command_run(self, context):
             pg.error = PDT_ERR_BAD3VALS
             context.window_manager.popup_menu(oops, title="Error", icon="ERROR")
             return
-        if mode == "v":
+        if mode in {"i", "v"}:
             vert_bool = True
         elif mode == "e":
             vert_bool = False
@@ -889,6 +891,32 @@ def command_run(self, context):
         _profile = float(vals[2])
         if _profile < 0.0 or _profile > 1.0:
             _profile = 0.5  # This is a circular profile
+        if mode == "i":
+            # Fillet & Intersect Two Edges
+            edges = [e for e in bm.edges if e.select]
+            if len(edges) == 2 and len(verts) == 4:
+                va = edges[0].verts[0]
+                vo = edges[0].verts[1]
+                vl = edges[1].verts[0]
+                vf = edges[1].verts[1]
+                vector_delta, done = intersection(va.co, vo.co, vl.co, vf.co, plane)
+                if not done:
+                    errmsg = f"{PDT_ERR_INT_LINES} {plane}  {PDT_LAB_PLANE}"
+                    self.report({"ERROR"}, errmsg)
+                    return {"FINISHED"}
+                if (va.co - vector_delta).length < (vo.co - vector_delta).length:
+                    va.co = vector_delta
+                    vo.select_set(False)
+                else:
+                    vo.co = vector_delta
+                    va.select_set(False)
+                if (vl.co - vector_delta).length < (vf.co - vector_delta).length:
+                    vl.co = vector_delta
+                    vf.select_set(False)
+                else:
+                    vf.co = vector_delta
+                    vl.select_set(False)
+                bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=0.0001)
         bpy.ops.mesh.bevel(
             offset_type="OFFSET",
             offset=_offset,