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--- projects:houseofcards:start [2016/07/09 18:05]
dwheele [Printing UVs for Object]
+++ projects:houseofcards:start [2017/11/18 18:03] (current)
dwheele
@@ Line 7: / Line 7: @@
   * [[pythonoperators|Python Operators from Blender]]
   * [[cardfaceinfo|Card Face Graphic Info]]
+  * [[blenderarraynumbering|Blender Array Numbering]]
+  * [[shufflecards|Shuffle Cards Routine in Python]]
+  * [[physicssettings|Physics Settings]]
+  * [[workingpython|Work Python Scripts (backup)]]
+  * [[playingcardspecifics|Playing Card Specifics]]
 My example ''c:\Projects\HouseOfCards\panelTest.blend'' has one object "Panel" which has two material slots,
@@ Line 300: / Line 305: @@
 Going back to non-BMESH method. In BMesh, it is difficult to assemble the correct types.
+==== Get Face from Mesh defined by Vertex Group ====
+<code python>
+import bpy
+ob = bpy.data.objects["Panel"];
+def getFaceFromObjectContainingVertexGroup(ob, vertexGroupName):
+  # First, get list of Vertexes in Vertex Group
+  groupIndex = -1
+  # This is an Object with a Mesh, see if it has the supported group name
+  for i in range(0, len(ob.vertex_groups)):
+    group = ob.vertex_groups[i]
+    if group.name == vertexGroupName:
+      groupIndex = i
+  # if we didn't find it, exit
+  if (groupIndex < 0):
+    return null
+  # Now access the vertices that are assigned to this group
+  bmVertGroupMembers = []
+  for v in ob.data.vertices:
+    for vertGroup in v.groups:
+      if vertGroup.group == groupIndex:
+         print("Vertex %d is part of group."%(v.index))
+         bmVertGroupMembers.append(v)
+  # at this point, we have a list of vertices in bmVertGroupMembers
+  # belonging to group vertexGroupName, with index groupIndex
+for f in me.polygons:
+    print("Polygon", f.index, "from loop index", f.loop_start, "and length", f.loop_total)
+    for i in f.loop_indices: # <-- python Range object with the proper indices already set
+        l = me.loops[i] # The loop entry this polygon point refers to
+        v = me.vertices[l.vertex_index] # The vertex data that loop entry refers to
+        print("\tLoop index", l.index, "points to vertex index", l.vertex_index, \
+            "at position", v.co)
+        for j,ul in enumerate(me.uv_layers):
+            print("\t\tUV Map", j, "has coordinates", ul.data[l.index].uv, \
+                "for this loop index")
+</code>

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