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io_export_smc.py
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io_export_smc.py
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# ***** GPL LICENSE BLOCK *****
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# All rights reserved.
# ***** GPL LICENSE BLOCK *****
# by Eric Depta
bl_info = {
"name": "Export Sauerbraten (.smc)",
"author": "Wrack",
"version": (1, 0),
"blender": (2, 6, 0),
"api": 42615,
"location": "File > Export > Sauerbraten (.smc)",
"description": "Export Selected Mesh to Sauerbraten",
"warning": "",
"wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/"\
"Scripts/Import-Export/PC2_Pointcache_export",
"tracker_url": "https://projects.blender.org/tracker/index.php?"\
"func=detail&aid=24703",
"category": "Import-Export"}
"""
-- Export Sauerbraten v0.0.1 --<br>
"""
import bpy
from bpy.props import *
import mathutils, math
from bpy_extras.io_utils import ExportHelper
from sys import stdout
class Grid:
def __init__(self):
self.density = []
self.dim = [0,0,0]
self.gridstep = 0
self.center = None
self.progress = ["|","/","-","\\"]
def boundMesh(self, mesh, longestRow):
## boundings ##
minX = mesh.vertices[0].co[0]
maxX = minX
minY = mesh.vertices[0].co[1]
maxY = minY
minZ = mesh.vertices[0].co[2]
maxZ = minZ
for v in mesh.vertices:
minX = min(minX,v.co[0])
maxX = max(maxX,v.co[0])
minY = min(minY,v.co[1])
maxY = max(maxY,v.co[1])
minZ = min(minZ,v.co[2])
maxZ = max(maxZ,v.co[2])
dimBox = [math.copysign(maxX, 0) + math.copysign(minX, 0), math.copysign(maxY, 0) + math.copysign(minY, 0), math.copysign(maxZ, 0) + math.copysign(minZ, 0)]
## calc grid vals##
self.gridstep = max(dimBox) / longestRow
self.dim = [math.ceil(dimBox[0]/self.gridstep), math.ceil(dimBox[1]/self.gridstep), math.ceil(dimBox[2]/self.gridstep)]
self.center = mathutils.Vector( (math.copysign(minX, 0), math.copysign(minY, 0), math.copysign(minZ, 0)) )
def solve(self, obj, mesh, useExpPIM, pbar):
i = 0
total = (self.dim[0]+1) * (self.dim[1]+1) * (self.dim[2]+1)
for xc in range(self.dim[0]+1):
self.density.append([])
for yc in range(self.dim[1]+1):
self.density[xc].append([])
for zc in range(self.dim[2]+1):
p = mathutils.Vector((xc*self.gridstep, yc*self.gridstep, zc*self.gridstep)) - self.center
location, normal, index = obj.closest_point_on_mesh(p)
d = self.distancePoints(p, location)
if useExpPIM:
if self.pointInsideMeshExp(mesh,p,index):
d = d * -1
else:
if self.pointInsideMesh(p,obj):
d = d * -1
self.density[xc][yc].append(d)
i += 1
pcnt = int(round((i/total) * 100,0))
pbar = pcnt
stdout.write("\rsolve: %d%%" %pcnt + " " + self.progress[i%4])
stdout.write("\n")
def pointInsideMeshExp(self,mesh,p,index):
inside = True
for i in range(3):
v = mesh.vertices[mesh.faces[index].vertices[i]]
pn = p.dot(v.normal)
tn = v.co.dot(v.normal)
if pn >= tn or abs(pn-tn)<0.0000001:
inside = False
break
return inside
def pointInsideMesh(self,point,ob):
axes = [ mathutils.Vector((1,0,0)) , mathutils.Vector((0,1,0)), mathutils.Vector((0,0,1)) ]
outside = False
for axis in axes:
orig = point
count = 0
lasthit = None
lasthiti = -1
lasthitcnt = 0
dx = 0.00001
while True:
location,normal,index = ob.ray_cast(orig,orig+axis*10000.0)
if index == -1: break
if lasthit == location or lasthiti == index:
lasthitcnt += 1
orig = location + axis*(dx*lasthitcnt)
else:
lasthit = location
lasthiti = index
count += 1
lasthitcnt = 0
## 0.01 need to be a calculated value but which
orig = location + axis*dx
if count%2 == 0:
outside = True
break
return not outside
def toStr(self, gridPower, file):
gridSizes = [1,2,4,8,16,32,64,128,256,512,1024,2048,4096] ## faster than facultation
csize = gridSizes[gridPower]
i = 0
total = self.dim[0] * self.dim[1] * self.dim[2]
for xc in range(self.dim[0]):
for yc in range(self.dim[1]):
for zc in range(self.dim[2]):
if (self.density[xc][yc][zc]<0 or self.density[xc+1][yc][zc]<0 or self.density[xc+1][yc+1][zc]<0 or self.density[xc][yc+1][zc]<0 or self.density[xc][yc][zc+1]<0 or self.density[xc+1][yc][zc+1]<0 or self.density[xc+1][yc+1][zc+1]<0 or self.density[xc][yc+1][zc+1]<0 ):
out = ""
out += '%d %d %d ' % ((xc * csize), (yc * csize), (zc * csize)) + '%d ' % csize
out += '%s ' % self.density[xc][yc][zc]
out += '%s ' % self.density[xc+1][yc][zc]
out += '%s ' % self.density[xc+1][yc+1][zc]
out += '%s ' % self.density[xc][yc+1][zc]
out += '%s ' % self.density[xc][yc][zc+1]
out += '%s ' % self.density[xc+1][yc][zc+1]
out += '%s ' % self.density[xc+1][yc+1][zc+1]
out += '%s' % self.density[xc][yc+1][zc+1]
out += '\n'
file.write(bytes(out,'ASCII'))
i += 1
pcnt = int(round((i/total) * 100,0))
stdout.write("\rwrite: %d%%" %pcnt + " " + self.progress[i%4])
stdout.write("\n")
def distancePoints(self, p1, p2):
return math.sqrt(math.pow(p2[0]-p1[0],2)+math.pow(p2[1]-p1[1],2)+math.pow(p2[2]-p1[2],2))
class Export_smc(bpy.types.Operator, ExportHelper):
'''Exports the active Object as a .smc file.'''
bl_idname = "export_shape.smc"
bl_label = "Export Sauerbraten (.smc)"
filename_ext = ".smc"
gridPower = IntProperty(name='Grid Power',
description='Cubes Grid Power',
default=4,
soft_max=12,
soft_min=0
)
longestRow = IntProperty(name='Cube Count',
description='Count of the Cubes on the longest',
default=2,
soft_min=1
)
useExpPIM = BoolProperty(name='Experimental PIM',
description='Use experimental point in mesh function',
default=False,
)
progress_bar = 1
def execute(self, context):
print("---- Sauerbraten Exporter ----")
props = self.properties
obj = context.active_object
scn = context.scene
if not obj:
error("No Object Selected")
return {'FINISHED'}
mesh = obj.to_mesh(scn, True, 'PREVIEW')
if not mesh:
error("Not a Mesh")
return {'FINISHED'}
## smc file format ##
filepath = self.filepath
filepath = bpy.path.ensure_ext(filepath, '.smc')
## make grid from mesh ##
grid = Grid()
grid.boundMesh(mesh, props.longestRow)
grid.solve(obj,mesh,props.useExpPIM,self.progress_bar)
##print("solved")
## write output file ##
out = open(filepath, "wb")
grid.toStr(props.gridPower,out)
out.close()
print("done")
return {'FINISHED'}
def menu_func(self, context):
self.layout.operator(Export_smc.bl_idname, text="Sauerbraten (.smc)")
def register():
bpy.utils.register_module(__name__)
bpy.types.INFO_MT_file_export.append(menu_func)
#bpy.types.VIEW3D_PT_tools_objectmode.prepend(menu_func)
def unregister():
bpy.utils.unregister_module(__name__)
bpy.types.INFO_MT_file_export.remove(menu_func)
#bpy.types.VIEW3D_PT_tools_objectmode.remove(menu_func)
if __name__ == "__main__":
register()