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                 if material.cast_shadows and material.alpha_cutoff>0.0:
  34                         for detail in ("", "_thsm"):
  35                                 shader_name = "occluder{}_masked.shader".format(detail)
  36                                 if shader_name not in resources:
  37                                         resources[shader_name] = self.export_shader(shader_name, "occluder{}.glsl".format(detail), {"use_alpha_cutoff":True}, resources)
  38
  39         def export_technique(self, material, resources):
  40                 from .material import Material
  41                 if type(material)!=Material:
  42                         material = Material(material)
  43
  44                 from .datafile import Resource, Statement, Token
  45                 tech_res = Resource(material.name+".tech", "technique")
  46
  47                 mat_res = resources[material.name+".mat"]
  48
  49                 blend_st = None
  50                 if material.blend_type=='ALPHA':
  51                         blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE_MINUS_SRC_ALPHA"))
  52                 elif material.blend_type=='ADDITIVE':
  53                         blend_st = Statement("blend", Token("ONE"), Token("ONE"))
  54                 elif material.blend_type=='ADDITIVE_ALPHA':
  55                         blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE"))
  56
  57                 if material.render_mode=='CUSTOM':
  58                         for m in material.render_methods:
  59                                 st = Statement("method", m.tag)
  60                                 if mat_res and m.use_material:
  61                                         st.sub.append(tech_res.create_reference_statement("material", mat_res))
  62
  63                                 if m.tag=="blended" and blend_st:
  64                                         st.sub.append(blend_st)
  65
  66                                 shader = m.shader
  67                                 if shader.endswith(".glsl"):
  68                                         shader += ".shader"
  69                                 st.sub.append(Statement("shader", shader))
  70
  71                                 if material.uniforms:
  72                                         ss = Statement("uniforms")
  73                                         for u in material.uniforms:
  74                                                 ss.sub.append(Statement("uniform", u.name, *u.values[:u.size]))
  75                                         st.sub.append(ss)
  76
  77                                 if material.face_cull=='BACK':
  78                                         st.sub.append(Statement("face_cull", Token("CULL_BACK")))
  79
  80                                 tech_res.statements.append(st)
  81                 else:
  82                         base_method = "blended" if material.blend_type!='NONE' else ""
  83                         st = Statement("method", base_method)
  84                         if mat_res:
  85                                 st.sub.append(tech_res.create_embed_statement("material", mat_res))
  86
  87                         if blend_st:
  88                                 st.sub.append(blend_st)
  89                         if material.receive_shadows:
  90                                 st.sub.append(Statement("receive_shadows", True))
  91                         if material.image_based_lighting:
  92                                 st.sub.append(Statement("image_based_lighting", True))
  93                         if material.face_cull=='BACK':
  94                                 st.sub.append(Statement("face_cull", Token("CULL_BACK")))
  95
  96                         tech_res.statements.append(st)
  97
  98                         if material.cast_shadows:
  99                                 tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, ""));
 100                                 tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, "_thsm"));
 101
 102                 return tech_res
 103
 104         def create_shadow_method(self, tech_res, material, resources, detail):
 105                 from .datafile import Statement, Token
 106
 107                 color_prop = next((p for p in material.properties if p.keyword and "color" in p.keyword), None)
 108
 109                 st = Statement("method", "shadow"+detail)
 110                 if material.alpha_cutoff>0.0 and color_prop and 'A' in color_prop.tex_channels:
 111                         st.sub.append(tech_res.create_reference_statement("shader", resources["occluder{}_masked.shader".format(detail)]))
 112                         ss = Statement("texture", "alpha_map")
 113
 114                         from .export_texture import TextureExporter
 115                         from .export_texture import SamplerExporter
 116                         texture_export = TextureExporter()
 117                         sampler_export = SamplerExporter()
 118
 119                         tex_res = resources[texture_export.get_texture_name(color_prop.texture, color_prop.tex_channels)]
 120                         ss.sub.append(tech_res.create_reference_statement("texture", tex_res))
 121                         ss.sub.append(tech_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(color_prop.texture)]))
 122                         st.sub.append(ss)
 123
 124                         ss = Statement("uniforms")
 125                         ss.sub.append(Statement("uniform", "alpha_cutoff", material.alpha_cutoff))
 126                         st.sub.append(ss)
 127                 else:
 128                         st.sub.append(Statement("shader", "occluder{}.glsl.shader".format(detail)))
 129
 130                 if material.face_cull=='BACK':
 131                         st.sub.append(Statement("face_cull", Token("CULL_BACK")))
 132
 133                 return st;
 134
 135         def export_material(self, material, resources):
 136                 from .datafile import Resource, Statement, Token
 137                 mat_res = Resource(material.name+".mat", "material")
 138
 139                 if material.type!="pbr" and material.type!="unlit":
 140                         raise Exception("Can't export material {} of unknown type {}".format(material.name, material.type))
 141
 142                 mat_res.statements.append(Statement("type", Token(material.type)));
 143                 for p in material.properties:
 144                         st = self.create_property_statement(mat_res, p, resources)
 145                         if st:
 146                                 mat_res.statements.append(st)
 147                 textures = [p.texture for p in material.properties if p.texture]
 148                 if textures:
 149                         from .export_texture import SamplerExporter
 150                         sampler_export = SamplerExporter()
 151                         mat_res.statements.append(mat_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(textures[0])]))
 152                 if material.alpha_cutoff>0.0:
 153                         mat_res.statements.append(Statement("alpha_cutoff", material.alpha_cutoff))
 154
 155                 return mat_res
 156
 157         def create_property_statement(self, mat_res, prop, resources):
 158                 from .datafile import Statement
 159                 if prop.texture:
 160                         from .export_texture import TextureExporter
 161                         texture_export = TextureExporter()
 162                         tex_res = resources[texture_export.get_texture_name(prop.texture, prop.tex_channels)]
 163                         return mat_res.create_reference_statement(prop.tex_keyword, tex_res)
 164                 elif not prop.keyword:
 165                         return
 166                 elif type(prop.value)==tuple:
 167                         return Statement(prop.keyword, *prop.value)
 168                 else:
 169                         return Statement(prop.keyword, prop.value)
 170
 171         def export_shader(self, name, module, spec_values, resources):
 172                 from .datafile import Resource, Statement
 173                 shader_res = Resource(name, "shader")
 174
 175                 st = Statement("module", module)
 176                 for k, v in spec_values.items():
 177                         st.sub.append(Statement("specialize", k, v))
 178                 shader_res.statements.append(st)
 179
 180                 return shader_res