191 lines
5.5 KiB
Python
191 lines
5.5 KiB
Python
# ***** BEGIN GPL LICENSE BLOCK *****
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#
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# Script copyright (C) Campbell J Barton
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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# <pep8 compliant>
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# History
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#
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# Originally written by Campbell Barton aka ideasman42
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#
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# 2009-11-01: * 2.5 port by Keith "Wahooney" Boshoff
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# * Replaced old method with my own, speed is similar (about 0.001 sec on Suzanne)
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# but results are far more accurate
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#
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import bpy
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import math
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import time
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from mathutils import Vector
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from bpy.props import *
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def applyVertexDirt(me, blur_iterations, blur_strength, clamp_dirt, clamp_clean, dirt_only):
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## Window.WaitCursor(1)
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#BPyMesh.meshCalcNormals(me)
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vert_tone = [0.0] * len(me.vertices)
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min_tone = 180.0
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max_tone = 0.0
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# create lookup table for each vertex's connected vertices (via edges)
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con = []
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con = [[] for i in range(len(me.vertices))]
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# add connected verts
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for e in me.edges:
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con[e.vertices[0]].append(e.vertices[1])
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con[e.vertices[1]].append(e.vertices[0])
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for i, v in enumerate(me.vertices):
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vec = Vector()
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no = v.normal
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co = v.co
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# get the direction of the vectors between the vertex and it's connected vertices
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for c in con[i]:
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vec += (me.vertices[c].co - co).normalize()
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# normalize the vector by dividing by the number of connected verts
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tot_con = len(con[i])
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if tot_con == 0:
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continue
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vec /= tot_con
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# angle is the acos of the dot product between vert and connected verts normals
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ang = math.acos(no.dot(vec))
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# enforce min/max
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ang = max(clamp_dirt, ang)
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if not dirt_only:
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ang = min(clamp_clean, ang)
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vert_tone[i] = ang
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# blur tones
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for i in range(blur_iterations):
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# backup the original tones
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orig_vert_tone = list(vert_tone)
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# use connected verts look up for blurring
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for j, c in enumerate(con):
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for v in c:
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vert_tone[j] += blur_strength * orig_vert_tone[v]
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vert_tone[j] /= len(c) * blur_strength + 1
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min_tone = min(vert_tone)
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max_tone = max(vert_tone)
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# debug information
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# print(min_tone * 2 * math.pi)
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# print(max_tone * 2 * math.pi)
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# print(clamp_clean)
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# print(clamp_dirt)
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tone_range = max_tone - min_tone
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if not tone_range:
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return
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active_col_layer = None
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if len(me.vertex_colors):
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for lay in me.vertex_colors:
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if lay.active:
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active_col_layer = lay.data
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else:
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bpy.ops.mesh.vertex_color_add()
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me.vertex_colors[0].active = True
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active_col_layer = me.vertex_colors[0].data
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if not active_col_layer:
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return('CANCELLED', )
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for i, f in enumerate(me.faces):
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if not me.use_paint_mask or f.select:
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f_col = active_col_layer[i]
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f_col = [f_col.color1, f_col.color2, f_col.color3, f_col.color4]
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for j, v in enumerate(f.vertices):
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col = f_col[j]
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tone = vert_tone[me.vertices[v].index]
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tone = (tone - min_tone) / tone_range
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if dirt_only:
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tone = min(tone, 0.5)
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tone *= 2
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col[0] = tone * col[0]
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col[1] = tone * col[1]
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col[2] = tone * col[2]
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## Window.WaitCursor(0)
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class VertexPaintDirt(bpy.types.Operator):
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bl_idname = "paint.vertex_color_dirt"
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bl_label = "Dirty Vertex Colors"
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bl_options = {'REGISTER', 'UNDO'}
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blur_strength = FloatProperty(name="Blur Strength", description="Blur strength per iteration", default=1.0, min=0.01, max=1.0)
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blur_iterations = IntProperty(name="Blur Iterations", description="Number times to blur the colors. (higher blurs more)", default=1, min=0, max=40)
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clean_angle = FloatProperty(name="Highlight Angle", description="Less then 90 limits the angle used in the tonal range", default=180.0, min=0.0, max=180.0)
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dirt_angle = FloatProperty(name="Dirt Angle", description="Less then 90 limits the angle used in the tonal range", default=0.0, min=0.0, max=180.0)
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dirt_only = BoolProperty(name="Dirt Only", description="Dont calculate cleans for convex areas", default=False)
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def execute(self, context):
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obj = context.object
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if not obj or obj.type != 'MESH':
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print('Error, no active mesh object, aborting')
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return('CANCELLED',)
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mesh = obj.data
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t = time.time()
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applyVertexDirt(mesh, self.blur_iterations, self.blur_strength, math.radians(self.dirt_angle), math.radians(self.clean_angle), self.dirt_only)
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print('Dirt calculated in %.6f' % (time.time() - t))
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return {'FINISHED'}
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def register():
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pass
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def unregister():
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pass
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if __name__ == "__main__":
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register()
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