diff options
author | Martin Buerbaum <martin.buerbaum@gmx.at> | 2010-04-26 15:24:41 +0400 |
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committer | Martin Buerbaum <martin.buerbaum@gmx.at> | 2010-04-26 15:24:41 +0400 |
commit | d5d773b70dddec2a48ff2b9e9e8f196c2e6fde49 (patch) | |
tree | ea4c04fde5be49f4cf87a1662f654b5f47b122f1 | |
parent | 87d65a477e22e9befcd7b5b77719f10b5b513219 (diff) |
* Added ngon_fill() function to quickly generate "good" quad geometry for even®ular ngons.
-rw-r--r-- | add_mesh_archimedean_solids.py | 72 |
1 files changed, 43 insertions, 29 deletions
diff --git a/add_mesh_archimedean_solids.py b/add_mesh_archimedean_solids.py index ea1f2b85..a933960d 100644 --- a/add_mesh_archimedean_solids.py +++ b/add_mesh_archimedean_solids.py @@ -229,6 +229,30 @@ def createFaces(vertIdx1, vertIdx2, closed=False, flipped=False): ######################## +# Converts regular ngons to quads +# Note: Exists because most "fill" functions can not be +# controlled as easily. +def ngon_fill(ngon, offset=0): + if offset: + ngon = ngon[1:] + [ngon[0]] + + if len(ngon) == 6: + # Hexagon + return [ + [ngon[0], ngon[1], ngon[2], ngon[3]], + [ngon[0], ngon[3], ngon[4], ngon[5]]] + + elif len(ngon) == 8: + # Octagon + return [ + [ngon[0], ngon[1], ngon[2], ngon[3]], + [ngon[0], ngon[3], ngon[4], ngon[7]], + [ngon[7], ngon[4], ngon[5], ngon[6]]] + + else: + return None + # Not supported (yet) + # Returns the middle location of a _regular_ polygon. # verts ... List of vertex coordinates (Vector) used by the ngon. # ngon ... List of ngones (vertex indices of each ngon point) @@ -344,22 +368,14 @@ def add_truncated_tetrahedron(hexagon_side=2.0 * sqrt(2.0) / 3.0, else: # Create quads from hexagons - (quad1, quad2) = ( - [ngon012[0], ngon012[1], ngon012[2], ngon012[3]], - [ngon012[0], ngon012[3], ngon012[4], ngon012[5]]) - faces.extend([quad1, quad2]) - (quad1, quad2) = ( - [ngon031[0], ngon031[1], ngon031[2], ngon031[3]], - [ngon031[0], ngon031[3], ngon031[4], ngon031[5]]) - faces.extend([quad1, quad2]) - (quad1, quad2) = ( - [ngon023[0], ngon023[1], ngon023[2], ngon023[3]], - [ngon023[0], ngon023[3], ngon023[4], ngon023[5]]) - faces.extend([quad1, quad2]) - (quad1, quad2) = ( - [ngon132[0], ngon132[1], ngon132[2], ngon132[3]], - [ngon132[0], ngon132[3], ngon132[4], ngon132[5]]) - faces.extend([quad1, quad2]) + hex_quads = ngon_fill(ngon012) + faces.extend(hex_quads) + hex_quads = ngon_fill(ngon031) + faces.extend(hex_quads) + hex_quads = ngon_fill(ngon023) + faces.extend(hex_quads) + hex_quads = ngon_fill(ngon132) + faces.extend(hex_quads) # Invert face normals tri1 = [tri1[0]] + list(reversed(tri1[1:])) @@ -563,27 +579,25 @@ def add_cuboctahedron(octagon_side=0.0, star_ngons=False): faces.extend([tri_xp_yp_zp, tri_xp_yn_zp, tri_xn_yp_zp, tri_xn_yn_zp]) faces.extend([tri_xp_yp_zn, tri_xp_yn_zn, tri_xn_yp_zn, tri_xn_yn_zn]) - # Offset vertices so QUADS are created with orthagonal edges. - # Superficial change - Could be omitted, especially for stars. - ngon_bot = ngon_bot[1:] + [ngon_bot[0]] - ngon_0 = ngon_0[1:] + [ngon_0[0]] - ngon_1 = ngon_1[1:] + [ngon_1[0]] - ngon_2 = ngon_2[1:] + [ngon_2[0]] - ngon_3 = ngon_3[1:] + [ngon_3[0]] - - ngons = [ngon_top, ngon_bot, ngon_0, ngon_1, ngon_2, ngon_3] if star_ngons: + ngons = [ngon_top, ngon_bot, ngon_0, ngon_1, ngon_2, ngon_3] # Create stars from octagons. verts, faces_star = get_polygon_center(verts, ngons) faces.extend(faces_star) else: # Create quads from octagons. + + # The octagon ont he top is the only polygon we don't need to offset. + oct_quads = ngon_fill(ngon_top) + faces.extend(oct_quads) + + ngons = [ngon_bot, ngon_0, ngon_1, ngon_2, ngon_3] for ngon in ngons: - faces.extend([ - [ngon[0], ngon[1], ngon[2], ngon[3]], - [ngon[0], ngon[3], ngon[4], ngon[7]], - [ngon[7], ngon[4], ngon[5], ngon[6]]]) + # offset=1 Offset vertices so QUADS are created with orthagonal edges. + # Superficial change - Could be omitted. + oct_quads = ngon_fill(ngon, offset=1) + faces.extend(oct_quads) return verts, faces, name |