blender/io_mspgl/export_scene.py

   1 import math
   2 import os
   3 import itertools
   4 import mathutils
   5
   6 class SceneExporter:
   7         def export_to_file(self, context, out_fn, *, selected_only=False, visible_only=True, collection=True, skip_existing=True):
   8                 from .util import Progress
   9                 progress = Progress(context)
  10
  11                 from .scene import create_scene_from_current
  12                 scene = create_scene_from_current(context, selected_only=selected_only, visible_only=visible_only)
  13
  14                 resources = {}
  15                 self.export_scene_resources(context, scene, resources, progress)
  16                 scene_res = self.export_scene(scene, resources)
  17                 progress.set_progress(1.0)
  18
  19                 path, base = os.path.split(out_fn)
  20                 base, ext = os.path.splitext(base)
  21
  22                 if collection:
  23                         existing = None
  24                         if skip_existing:
  25                                 existing = lambda r: not os.path.exists(os.path.join(path, r.name))
  26                         scene_res.write_collection(out_fn, filter=existing)
  27                 else:
  28                         scene_res.write_to_file(out_fn)
  29                         for r in scene_res.collect_references():
  30                                 r.write_to_file(os.path.join(path, r.name))
  31
  32         def export_scene_resources(self, context, scene, resources, progress):
  33                 from .export import DataExporter
  34                 data_exporter = DataExporter()
  35
  36                 data_exporter.export_resources(context, scene.prototypes, resources, None, progress)
  37
  38         def export_scene(self, scene, resources):
  39                 from .datafile import Resource, Statement, Token
  40                 scene_res = Resource(scene.name+".scene", "scene")
  41
  42                 if scene.background_set or (scene.instances and scene.blended_instances):
  43                         scene_res.statements.append(Statement("type", Token("ordered")))
  44                         if scene.background_set:
  45                                 scene_res.statements.append(scene_res.create_reference_statement("scene", resources[scene.background_set.name+".scene"]))
  46
  47                         if scene.instances:
  48                                 st = Statement("scene")
  49                                 st.sub.append(Statement("type", Token("simple")))
  50                                 self.add_instances(scene_res, st.sub, scene.instances, resources)
  51                                 scene_res.statements.append(st)
  52
  53                         if scene.blended_instances:
  54                                 st = Statement("scene")
  55                                 st.sub.append(Statement("type", Token("zsorted")))
  56                                 self.add_instances(scene_res, st.sub, scene.blended_instances, resources)
  57                                 scene_res.statements.append(st)
  58                 else:
  59                         scene_type = "zsorted" if scene.blended_instances else "simple"
  60                         scene_res.statements.append(Statement("type", Token(scene_type)))
  61
  62                         self.add_instances(scene_res, scene_res.statements, scene.instances, resources)
  63                         self.add_instances(scene_res, scene_res.statements, scene.blended_instances, resources)
  64
  65                 return scene_res
  66
  67         def add_instances(self, scene_res, statements, instances, resources):
  68                 from .datafile import Statement
  69
  70                 for i in instances:
  71                         obj_res = resources[i.prototype.name+".object"]
  72                         st = scene_res.create_reference_statement("object", obj_res, i.name)
  73
  74                         ss = Statement("transform")
  75
  76                         loc = i.matrix_world.to_translation()
  77                         ss.sub.append(Statement("position", *tuple(loc)))
  78
  79                         quat = i.matrix_world.to_quaternion()
  80                         if i.rotation_mode in ('XYZ', 'XZY', 'YXZ', 'YZX', 'ZXY', 'ZYX'):
  81                                 angles = [a*180/math.pi for a in quat.to_euler()]
  82                                 ss.sub.append(Statement("euler", *angles));
  83                         else:
  84                                 ss.sub.append(Statement("rotation", quat.angle*180/math.pi, *tuple(quat.axis)))
  85
  86                         scale = i.matrix_world.to_scale()
  87                         ss.sub.append(Statement("scale", *tuple(scale)))
  88
  89                         st.sub.append(ss)
  90                         statements.append(st)
  91
  92         def export_sequence_resources(self, scene, resources):
  93                 from .datafile import Resource, Statement, Token
  94
  95                 lights = []
  96                 s = scene
  97                 while s:
  98                         lights += s.lights
  99                         s = s.background_set
 100
 101                 from .util import make_unique
 102                 lights = make_unique(lights)
 103
 104                 from .export_light import LightExporter
 105                 light_exporter = LightExporter()
 106                 for l in lights:
 107                         light_name = l.name+".light"
 108                         if light_name not in resources:
 109                                 resources[light_name] = light_exporter.export_light(l)
 110
 111                 lighting_name = scene.name+".lightn"
 112                 if lighting_name not in resources:
 113                         lighting_res = Resource(lighting_name, "lighting")
 114                         lighting_res.statements.append(Statement("ambient", *tuple(scene.ambient_light)))
 115                         for l in lights:
 116                                 lighting_res.statements.append(lighting_res.create_reference_statement("light", resources[l.name+".light"]))
 117
 118                         resources[lighting_name] = lighting_res
 119
 120         def export_sequence(self, scene, resources):
 121                 from .datafile import Resource, Statement, Token
 122                 seq_res = Resource(scene.name+".seq", "sequence")
 123
 124                 if scene.use_hdr:
 125                         seq_res.statements.append(Statement("hdr", True))
 126
 127                 self.add_clear(seq_res.statements, (0.0, 0.0, 0.0, 0.0), 1.0)
 128
 129                 scene_res = resources[scene.name+".scene"]
 130                 seq_res.statements.append(seq_res.create_reference_statement("renderable", "content", scene_res))
 131
 132                 lighting_res = resources[scene.name+".lightn"]
 133
 134                 any_opaque = False
 135                 any_blended = False
 136                 use_ibl = False
 137                 use_shadow = False
 138                 shadowed_lights = []
 139                 shadow_casters = []
 140                 s = scene
 141                 while s:
 142                         if s.instances:
 143                                 any_opaque = True
 144                         if s.blended_instances:
 145                                 any_blended = True
 146                         if s.use_ibl:
 147                                 use_ibl = True
 148                         if s.use_shadow:
 149                                 use_shadow = True
 150                         shadowed_lights += [l.data for l in s.lights if l.data.use_shadow]
 151                         for i in itertools.chain(s.instances, s.blended_instances):
 152                                 p = i.prototype
 153                                 if p.material_slots and p.material_slots[0].material and p.material_slots[0].material.shadow_method!='NONE':
 154                                         shadow_casters.append(i)
 155                         s = s.background_set
 156
 157                 shadowed_lights.sort(key=lambda l:l.shadow_map_size, reverse=True)
 158
 159                 main_tags = []
 160                 if any_opaque:
 161                         main_tags.append("")
 162                 if any_blended:
 163                         main_tags.append("blended")
 164
 165                 content = "content"
 166                 if use_ibl and scene.use_sky:
 167                         self.add_auxiliary_sequence(seq_res, "environment", "sky", ((0.0, 0.0, 0.0, 0.0), 1.0), main_tags, lighting_res)
 168
 169                         st = Statement("effect", "environment")
 170                         st.sub.append(Statement("type", Token("environment_map")))
 171                         st.sub.append(Statement("size", 32))
 172                         st.sub.append(Statement("roughness_levels", 2))
 173                         st.sub.append(Statement("fixed_position", 0.0, 0.0, 0.0))
 174                         st.sub.append(Statement("content", content))
 175                         st.sub.append(Statement("environment", "environment_sequence"))
 176
 177                         seq_res.statements.append(st)
 178                         content = "environment"
 179
 180                 if scene.use_sky:
 181                         st = Statement("effect", "sky")
 182                         st.sub.append(Statement("type", Token("sky")))
 183                         st.sub.append(seq_res.create_reference_statement("sun", resources[scene.sun_light.name+".light"]))
 184                         st.sub.append(Statement("content", content))
 185
 186                         seq_res.statements.append(st)
 187                         content = "sky"
 188
 189                 if use_shadow:
 190                         self.add_auxiliary_sequence(seq_res, "shadow", "content", (None, 1.0), ["shadow"], None)
 191                         self.add_auxiliary_sequence(seq_res, "thsm", "content", (None, 1.0), ["shadow_thsm"], None)
 192
 193                         st = Statement("effect", "shadow_map")
 194                         st.sub.append(Statement("type", Token("shadow_map")))
 195                         st.sub.append(Statement("size", *self.compute_shadowmap_size(shadowed_lights)))
 196                         target, radius = self.compute_bounding_sphere(shadow_casters)
 197                         st.sub.append(Statement("target", *target))
 198                         st.sub.append(Statement("radius", radius))
 199                         st.sub.append(Statement("content", content))
 200                         st.sub.append(seq_res.create_reference_statement("lighting", lighting_res))
 201                         for l in shadowed_lights:
 202                                 ss = seq_res.create_reference_statement("light", resources[l.name+".light"])
 203                                 ss.sub.append(Statement("size", int(l.shadow_map_size)))
 204                                 shadow_caster = "thsm_sequence" if l.type=='POINT' else "shadow_sequence"
 205                                 ss.sub.append(Statement("shadow_caster", shadow_caster))
 206                                 st.sub.append(ss)
 207
 208                         seq_res.statements.append(st)
 209                         content = "shadow_map"
 210
 211                 self.add_content_steps(seq_res, content, lighting_res, main_tags)
 212
 213                 if scene.use_ao:
 214                         ss = Statement("postprocessor")
 215                         ss.sub.append(Statement("type", Token("ambient_occlusion")))
 216                         ss.sub.append(Statement("occlusion_radius", scene.ao_distance))
 217                         ss.sub.append(Statement("samples", scene.ao_samples))
 218                         seq_res.statements.append(ss)
 219
 220                 if scene.use_hdr:
 221                         ss = Statement("postprocessor")
 222                         ss.sub.append(Statement("type", Token("bloom")))
 223                         seq_res.statements.append(ss)
 224
 225                         ss = Statement("postprocessor")
 226                         ss.sub.append(Statement("type", Token("colorcurve")))
 227                         ss.sub.append(Statement("exposure_adjust", scene.exposure))
 228                         ss.sub.append(Statement("srgb"))
 229                         seq_res.statements.append(ss)
 230                 else:
 231                         # Add a colorcurve with linear response to convert into sRGB color space
 232                         ss = Statement("postprocessor")
 233                         ss.sub.append(Statement("type", Token("colorcurve")))
 234                         ss.sub.append(Statement("brightness_response", 1.0))
 235                         ss.sub.append(Statement("srgb"))
 236                         seq_res.statements.append(ss)
 237
 238                 return seq_res
 239
 240         def add_clear(self, statements, color, depth):
 241                 from .datafile import Statement
 242
 243                 st = Statement("clear")
 244                 if color is not None:
 245                         st.sub.append(Statement("color", *color))
 246                 if depth is not None:
 247                         st.sub.append(Statement("depth", depth))
 248                 statements.append(st)
 249
 250         def add_content_steps(self, seq_res, renderable, lighting, tags):
 251                 from .datafile import Statement, Token
 252
 253                 for t in tags:
 254                         st = Statement("step", t, renderable)
 255                         st.sub.append(Statement("depth_test", Token("LEQUAL")))
 256                         if lighting:
 257                                 st.sub.append(seq_res.create_reference_statement("lighting", lighting))
 258                         seq_res.statements.append(st)
 259
 260         def add_auxiliary_sequence(self, seq_res, aux_name, content, clear_values, step_tags, lighting):
 261                 seq_name = os.path.splitext(seq_res.name)[0]
 262
 263                 from .datafile import Resource, Statement
 264                 aux_seq_res = Resource("{}_{}.seq".format(seq_name, aux_name), "sequence")
 265                 self.add_clear(aux_seq_res.statements, *clear_values)
 266                 aux_seq_res.statements.append(Statement("renderable", "content"))
 267                 self.add_content_steps(aux_seq_res, "content", lighting, step_tags)
 268
 269                 st = seq_res.create_reference_statement("sequence", aux_name+"_sequence", aux_seq_res)
 270                 st.sub.append(Statement("renderable", "content", content))
 271                 seq_res.statements.append(st)
 272
 273         def compute_shadowmap_size(self, lights):
 274                 total_area = 0
 275                 for l in lights:
 276                         s = int(l.shadow_map_size)
 277                         total_area += s*s
 278
 279                 size = 1
 280                 while size*size<total_area:
 281                         size *= 2
 282                 if size*size>total_area*2:
 283                         return (size, size//2)
 284                 else:
 285                         return (size, size)
 286
 287         def compute_bounding_sphere(self, instances):
 288                 points = []
 289                 for i in instances:
 290                         points += [i.matrix_world@mathutils.Vector(c) for c in i.prototype.bound_box]
 291
 292                 from .util import compute_bounding_sphere
 293                 return compute_bounding_sphere(points)