Moves the cursor if there's an intersection, else prints message.
import bpy
import bmesh
from mathutils.geometry import intersect_line_line as LineIntersect
class CAD_prefs:
VTX_PRECISION = 1.0e-5
VTX_DOUBLES_THRSHLD = 0.0001
def coords_tuple_from_edge_idx(bm, idx):
''' bm is a bmesh representation '''
return tuple(v.co for v in bm.edges[idx].verts)
def get_intersection_from_idxs(bm, idx1, ixd2):
'''
> takes reference to bm and 2 indices
< returns intersection or None
'''
p1, p2 = coords_tuple_from_edge_idx(bm, idx1)
p3, p4 = coords_tuple_from_edge_idx(bm, idx2)
a, b = LineIntersect(p1, p2, p3, p4)
if (a-b).length < CAD_prefs.VTX_PRECISION:
return a
obj = bpy.context.active_object
me = obj.data
bm = bmesh.from_edit_mesh(me)
me.update()
edges = [e for e in bm.edges if e.select]
idx1, idx2 = [edge.index for edge in edges]
pt = get_intersection_from_idxs(bm, idx1, idx2)
if pt:
print(pt)
bpy.context.scene.cursor_location = pt
else:
print("no intersection")
