blender/io_mspgl/export_material.py

   1 class MaterialExporter:
   2         def export_technique_resources(self, ctx, material, resources):
   3                 from .export_texture import SamplerExporter, TextureExporter
   4                 texture_export = TextureExporter()
   5                 sampler_export = SamplerExporter()
   6
   7                 from .material import Material
   8                 if type(material)!=Material:
   9                         material = Material(material)
  10
  11                 textured_props = [p for p in material.properties if p.texture]
  12
  13                 ctx.set_slices(len(textured_props)+1)
  14                 for p in textured_props:
  15                         ctx.next_slice(p.texture.image)
  16
  17                         tex_name = texture_export.get_texture_name(p.texture, p.tex_channels)
  18                         if tex_name not in resources:
  19                                 resources[tex_name] = texture_export.export_texture(p.texture, p.tex_channels)
  20
  21                         samp_name = sampler_export.get_sampler_name(p.texture)
  22                         if samp_name not in resources:
  23                                 resources[samp_name] = sampler_export.export_sampler(p.texture)
  24
  25                 ctx.next_slice(material)
  26                 mat_name = material.name+".mat"
  27                 if mat_name not in resources:
  28                         if material.type:
  29                                 resources[mat_name] = self.export_material(material, resources)
  30                         else:
  31                                 resources[mat_name] = None
  32
  33                 for thsm in (False, True):
  34                         occluder_variant, occluder_spec_values = self.get_occluder_shader_variant(material, thsm)
  35                         if occluder_spec_values:
  36                                 base_variant = "_thsm" if thsm else ""
  37                                 shader_name = "occluder{}.shader".format(occluder_variant)
  38                                 if shader_name not in resources:
  39                                         resources[shader_name] = self.export_shader(shader_name, "occluder{}.glsl".format(base_variant), occluder_spec_values, resources)
  40
  41         def export_technique(self, material, resources):
  42                 from .material import Material
  43                 if type(material)!=Material:
  44                         material = Material(material)
  45
  46                 from .datafile import Resource, Statement, Token
  47                 tech_res = Resource(material.name+".tech", "technique")
  48
  49                 mat_res = resources[material.name+".mat"]
  50
  51                 blend_st = None
  52                 if material.blend_type=='ALPHA':
  53                         blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE_MINUS_SRC_ALPHA"))
  54                 elif material.blend_type=='ADDITIVE':
  55                         blend_st = Statement("blend", Token("ONE"), Token("ONE"))
  56                 elif material.blend_type=='ADDITIVE_ALPHA':
  57                         blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE"))
  58
  59                 if material.render_mode=='CUSTOM':
  60                         for m in material.render_methods:
  61                                 st = Statement("method", m.tag)
  62                                 if mat_res and m.use_material:
  63                                         st.sub.append(tech_res.create_reference_statement("material", mat_res))
  64
  65                                 if m.tag=="blended" and blend_st:
  66                                         st.sub.append(blend_st)
  67
  68                                 shader = m.shader
  69                                 if shader.endswith(".glsl"):
  70                                         shader += ".shader"
  71                                 st.sub.append(Statement("shader", shader))
  72
  73                                 if material.uniforms:
  74                                         ss = Statement("uniforms")
  75                                         for u in material.uniforms:
  76                                                 ss.sub.append(Statement("uniform", u.name, *u.values[:u.size]))
  77                                         st.sub.append(ss)
  78
  79                                 if material.face_cull=='BACK':
  80                                         st.sub.append(Statement("face_cull", Token("CULL_BACK")))
  81
  82                                 tech_res.statements.append(st)
  83                 else:
  84                         base_method = "blended" if material.blend_type!='NONE' else ""
  85                         st = Statement("method", base_method)
  86                         if mat_res:
  87                                 st.sub.append(tech_res.create_embed_statement("material", mat_res))
  88
  89                         if blend_st:
  90                                 st.sub.append(blend_st)
  91                         if material.receive_shadows:
  92                                 st.sub.append(Statement("receive_shadows", True))
  93                         if material.image_based_lighting:
  94                                 st.sub.append(Statement("image_based_lighting", True))
  95                         if material.instancing:
  96                                 st.sub.append(Statement("instancing", True))
  97                         if material.face_cull=='BACK':
  98                                 st.sub.append(Statement("face_cull", Token("CULL_BACK")))
  99
 100                         tech_res.statements.append(st)
 101
 102                         if material.cast_shadows:
 103                                 tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, False));
 104                                 tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, True));
 105
 106                 return tech_res
 107
 108         def create_shadow_method(self, tech_res, material, resources, thsm):
 109                 from .datafile import Statement, Token
 110
 111                 occluder_variant, occluder_spec_values = self.get_occluder_shader_variant(material, thsm)
 112
 113                 shader_stem = "occluder{}.shader" if occluder_spec_values else "occluder{}.glsl.shader"
 114                 shader_name = shader_stem.format(occluder_variant)
 115
 116                 st = Statement("method", "shadow"+("_thsm" if thsm else ""))
 117                 if occluder_spec_values:
 118                         st.sub.append(tech_res.create_reference_statement("shader", resources[shader_name]))
 119                 else:
 120                         st.sub.append(Statement("shader", shader_name))
 121
 122                 if occluder_spec_values.get("use_alpha_cutoff"):
 123                         ss = Statement("texture", "alpha_map")
 124
 125                         from .export_texture import TextureExporter
 126                         from .export_texture import SamplerExporter
 127                         texture_export = TextureExporter()
 128                         sampler_export = SamplerExporter()
 129
 130                         color_prop = material.properties[0]
 131                         tex_res = resources[texture_export.get_texture_name(color_prop.texture, color_prop.tex_channels)]
 132                         ss.sub.append(tech_res.create_reference_statement("texture", tex_res))
 133                         ss.sub.append(tech_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(color_prop.texture)]))
 134                         st.sub.append(ss)
 135
 136                         ss = Statement("uniforms")
 137                         ss.sub.append(Statement("uniform", "alpha_cutoff", material.alpha_cutoff))
 138                         st.sub.append(ss)
 139
 140                 if material.face_cull=='BACK':
 141                         st.sub.append(Statement("face_cull", Token("CULL_BACK")))
 142
 143                 return st;
 144
 145         def get_occluder_shader_variant(self, material, thsm):
 146                 variant = ""
 147                 if thsm:
 148                         variant += "_thsm"
 149
 150                 spec_values = {}
 151
 152                 color_prop = material.properties[0]
 153                 if material.cast_shadows and material.alpha_cutoff>0.0:
 154                         spec_values["use_alpha_cutoff"] = True
 155                         variant += "_masked"
 156                 if material.instancing:
 157                         spec_values["use_instancing"] = True
 158                         variant += "_instanced"
 159
 160                 return (variant, spec_values)
 161
 162         def export_material(self, material, resources):
 163                 from .datafile import Resource, Statement, Token
 164                 mat_res = Resource(material.name+".mat", "material")
 165
 166                 if material.type!="pbr" and material.type!="unlit":
 167                         raise Exception("Can't export material {} of unknown type {}".format(material.name, material.type))
 168
 169                 mat_res.statements.append(Statement("type", Token(material.type)));
 170                 for p in material.properties:
 171                         st = self.create_property_statement(mat_res, p, resources)
 172                         if st:
 173                                 mat_res.statements.append(st)
 174                 textures = [p.texture for p in material.properties if p.texture]
 175                 if textures:
 176                         from .export_texture import SamplerExporter
 177                         sampler_export = SamplerExporter()
 178                         mat_res.statements.append(mat_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(textures[0])]))
 179                 if material.alpha_cutoff>0.0:
 180                         mat_res.statements.append(Statement("alpha_cutoff", material.alpha_cutoff))
 181
 182                 return mat_res
 183
 184         def create_property_statement(self, mat_res, prop, resources):
 185                 from .datafile import Statement
 186                 if prop.texture:
 187                         from .export_texture import TextureExporter
 188                         texture_export = TextureExporter()
 189                         tex_res = resources[texture_export.get_texture_name(prop.texture, prop.tex_channels)]
 190                         return mat_res.create_reference_statement(prop.tex_keyword, tex_res)
 191                 elif not prop.keyword:
 192                         return
 193                 elif type(prop.value)==tuple:
 194                         return Statement(prop.keyword, *prop.value)
 195                 else:
 196                         return Statement(prop.keyword, prop.value)
 197
 198         def export_shader(self, name, module, spec_values, resources):
 199                 from .datafile import Resource, Statement
 200                 shader_res = Resource(name, "shader")
 201
 202                 st = Statement("module", module)
 203                 for k, v in spec_values.items():
 204                         st.sub.append(Statement("specialize", k, v))
 205                 shader_res.statements.append(st)
 206
 207                 return shader_res