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, ctx, out_fn, *, selected_only=False, visible_only=True, collection=True, skip_existing=True):
   8                 from .scene import create_scene_from_current
   9                 task = ctx.task("Preparing scene", 0.1)
  10                 scene = create_scene_from_current(task, selected_only=selected_only, visible_only=visible_only)
  11
  12                 resources = {}
  13                 task = ctx.task("Exporting resources", 0.9)
  14                 self.export_scene_resources(task, scene, resources)
  15                 task = ctx.task(scene, 1.0)
  16                 scene_res = self.export_scene(scene, resources)
  17
  18                 path, base = os.path.split(out_fn)
  19                 base, ext = os.path.splitext(base)
  20
  21                 task = ctx.task("Writing files", 1.0)
  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, ctx, scene, resources):
  33                 from .export import DataExporter
  34                 data_exporter = DataExporter()
  35
  36                 data_exporter.export_resources(ctx, [p.object for p in scene.prototypes], resources)
  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)
  73                         if i.name:
  74                                 st.append(i.name)
  75
  76                         st.sub.append(self.create_transform_statement(i))
  77                         statements.append(st)
  78
  79         def create_transform_statement(self, instance):
  80                 from .datafile import Statement
  81
  82                 st = Statement("transform")
  83
  84                 loc = instance.matrix_world.to_translation()
  85                 st.sub.append(Statement("position", *tuple(loc)))
  86
  87                 quat = instance.matrix_world.to_quaternion()
  88                 if instance.rotation_mode in ('XYZ', 'XZY', 'YXZ', 'YZX', 'ZXY', 'ZYX'):
  89                         angles = [a*180/math.pi for a in quat.to_euler()]
  90                         st.sub.append(Statement("euler", *angles));
  91                 else:
  92                         st.sub.append(Statement("rotation", quat.angle*180/math.pi, *tuple(quat.axis)))
  93
  94                 scale = instance.matrix_world.to_scale()
  95                 st.sub.append(Statement("scale", *tuple(scale)))
  96
  97                 return st
  98
  99         def export_sequence_resources(self, scene, resources):
 100                 from .datafile import Resource, Statement, Token
 101
 102                 lights = []
 103                 s = scene
 104                 while s:
 105                         lights += s.lights
 106                         s = s.background_set
 107
 108                 from .util import make_unique
 109                 lights = make_unique(lights)
 110
 111                 from .export_light import LightExporter
 112                 light_exporter = LightExporter()
 113                 for l in lights:
 114                         light_name = l.name+".light"
 115                         if light_name not in resources:
 116                                 resources[light_name] = light_exporter.export_light(l)
 117
 118                 lighting_name = scene.name+".lightn"
 119                 if lighting_name not in resources:
 120                         lighting_res = Resource(lighting_name, "lighting")
 121                         lighting_res.statements.append(Statement("ambient", *tuple(scene.ambient_light)))
 122                         for l in lights:
 123                                 lighting_res.statements.append(lighting_res.create_reference_statement("light", resources[l.name+".light"]))
 124
 125                         resources[lighting_name] = lighting_res
 126
 127         def export_sequence(self, scene, resources):
 128                 from .datafile import Resource, Statement, Token
 129                 seq_res = Resource(scene.name+".seq", "sequence")
 130
 131                 if scene.use_hdr:
 132                         seq_res.statements.append(Statement("hdr", True))
 133
 134                 self.add_clear(seq_res.statements, (0.0, 0.0, 0.0, 0.0), 1.0)
 135
 136                 scene_res = resources[scene.name+".scene"]
 137                 seq_res.statements.append(seq_res.create_reference_statement("renderable", "content", scene_res))
 138
 139                 lighting_res = resources[scene.name+".lightn"]
 140
 141                 any_opaque = False
 142                 any_blended = False
 143                 use_ibl = False
 144                 use_shadow = False
 145                 shadowed_lights = []
 146                 shadow_casters = []
 147                 s = scene
 148                 while s:
 149                         if s.instances:
 150                                 any_opaque = True
 151                         if s.blended_instances:
 152                                 any_blended = True
 153                         if s.use_ibl:
 154                                 use_ibl = True
 155                         if s.use_shadow:
 156                                 use_shadow = True
 157                         shadowed_lights += [l.data for l in s.lights if l.data.use_shadow]
 158                         for i in itertools.chain(s.instances, s.blended_instances):
 159                                 o = i.prototype.object
 160                                 if o.material_slots and o.material_slots[0].material and o.material_slots[0].material.shadow_method!='NONE':
 161                                         shadow_casters.append(i)
 162                         s = s.background_set
 163
 164                 shadowed_lights.sort(key=lambda l:l.shadow_map_size, reverse=True)
 165
 166                 main_tags = []
 167                 if any_opaque:
 168                         main_tags.append("")
 169                 if any_blended:
 170                         main_tags.append("blended")
 171
 172                 content = "content"
 173                 if use_ibl and scene.use_sky:
 174                         self.add_auxiliary_sequence(seq_res, "environment", "sky", ((0.0, 0.0, 0.0, 0.0), 1.0), main_tags, lighting_res)
 175
 176                         st = Statement("effect", "environment")
 177                         st.sub.append(Statement("type", Token("environment_map")))
 178                         st.sub.append(Statement("size", 32))
 179                         st.sub.append(Statement("roughness_levels", 2))
 180                         st.sub.append(Statement("fixed_position", 0.0, 0.0, 0.0))
 181                         st.sub.append(Statement("content", content))
 182                         st.sub.append(Statement("environment", "environment_sequence"))
 183
 184                         seq_res.statements.append(st)
 185                         content = "environment"
 186
 187                 if scene.use_sky:
 188                         st = Statement("effect", "sky")
 189                         st.sub.append(Statement("type", Token("sky")))
 190                         st.sub.append(seq_res.create_reference_statement("sun", resources[scene.sun_light.name+".light"]))
 191                         st.sub.append(Statement("content", content))
 192
 193                         seq_res.statements.append(st)
 194                         content = "sky"
 195
 196                 if use_shadow:
 197                         self.add_auxiliary_sequence(seq_res, "shadow", "content", (None, 1.0), ["shadow"], None)
 198                         self.add_auxiliary_sequence(seq_res, "thsm", "content", (None, 1.0), ["shadow_thsm"], None)
 199
 200                         st = Statement("effect", "shadow_map")
 201                         st.sub.append(Statement("type", Token("shadow_map")))
 202                         st.sub.append(Statement("enable_for_method", "blended"))
 203                         st.sub.append(Statement("size", *self.compute_shadowmap_size(shadowed_lights)))
 204                         target, radius = self.compute_bounding_sphere(shadow_casters)
 205                         st.sub.append(Statement("target", *target))
 206                         st.sub.append(Statement("radius", radius))
 207                         st.sub.append(Statement("content", content))
 208                         st.sub.append(seq_res.create_reference_statement("lighting", lighting_res))
 209                         for l in shadowed_lights:
 210                                 ss = seq_res.create_reference_statement("light", resources[l.name+".light"])
 211                                 ss.sub.append(Statement("size", int(l.shadow_map_size)))
 212                                 shadow_caster = "thsm_sequence" if l.type=='POINT' else "shadow_sequence"
 213                                 ss.sub.append(Statement("shadow_caster", shadow_caster))
 214                                 st.sub.append(ss)
 215
 216                         seq_res.statements.append(st)
 217                         content = "shadow_map"
 218
 219                 self.add_content_steps(seq_res, content, lighting_res, main_tags)
 220
 221                 if scene.use_ao:
 222                         ss = Statement("postprocessor")
 223                         ss.sub.append(Statement("type", Token("ambient_occlusion")))
 224                         ss.sub.append(Statement("occlusion_radius", scene.ao_distance))
 225                         ss.sub.append(Statement("samples", scene.ao_samples))
 226                         seq_res.statements.append(ss)
 227
 228                 if scene.use_hdr:
 229                         ss = Statement("postprocessor")
 230                         ss.sub.append(Statement("type", Token("bloom")))
 231                         seq_res.statements.append(ss)
 232
 233                         ss = Statement("postprocessor")
 234                         ss.sub.append(Statement("type", Token("colorcurve")))
 235                         ss.sub.append(Statement("exposure_adjust", scene.exposure))
 236                         ss.sub.append(Statement("srgb"))
 237                         seq_res.statements.append(ss)
 238                 else:
 239                         # Add a colorcurve with linear response to convert into sRGB color space
 240                         ss = Statement("postprocessor")
 241                         ss.sub.append(Statement("type", Token("colorcurve")))
 242                         ss.sub.append(Statement("brightness_response", 1.0))
 243                         ss.sub.append(Statement("srgb"))
 244                         seq_res.statements.append(ss)
 245
 246                 return seq_res
 247
 248         def add_clear(self, statements, color, depth):
 249                 from .datafile import Statement
 250
 251                 st = Statement("clear")
 252                 if color is not None:
 253                         st.sub.append(Statement("color", *color))
 254                 if depth is not None:
 255                         st.sub.append(Statement("depth", depth))
 256                 statements.append(st)
 257
 258         def add_content_steps(self, seq_res, renderable, lighting, tags):
 259                 from .datafile import Statement, Token
 260
 261                 for t in tags:
 262                         st = Statement("step", t, renderable)
 263                         st.sub.append(Statement("depth_test", Token("LEQUAL")))
 264                         if lighting:
 265                                 st.sub.append(seq_res.create_reference_statement("lighting", lighting))
 266                         seq_res.statements.append(st)
 267
 268         def add_auxiliary_sequence(self, seq_res, aux_name, content, clear_values, step_tags, lighting):
 269                 seq_name = os.path.splitext(seq_res.name)[0]
 270
 271                 from .datafile import Resource, Statement
 272                 aux_seq_res = Resource("{}_{}.seq".format(seq_name, aux_name), "sequence")
 273                 self.add_clear(aux_seq_res.statements, *clear_values)
 274                 aux_seq_res.statements.append(Statement("renderable", "content"))
 275                 self.add_content_steps(aux_seq_res, "content", lighting, step_tags)
 276
 277                 st = seq_res.create_reference_statement("sequence", aux_name+"_sequence", aux_seq_res)
 278                 st.sub.append(Statement("renderable", "content", content))
 279                 seq_res.statements.append(st)
 280
 281         def compute_shadowmap_size(self, lights):
 282                 total_area = 0
 283                 for l in lights:
 284                         s = int(l.shadow_map_size)
 285                         total_area += s*s
 286
 287                 size = 1
 288                 while size*size<total_area:
 289                         size *= 2
 290                 if size*size>total_area*2:
 291                         return (size, size//2)
 292                 else:
 293                         return (size, size)
 294
 295         def compute_bounding_sphere(self, instances):
 296                 points = []
 297                 for i in instances:
 298                         points += [i.matrix_world@mathutils.Vector(c) for c in i.prototype.object.bound_box]
 299
 300                 from .util import compute_bounding_sphere
 301                 return compute_bounding_sphere(points)