+ if material.cast_shadows and material.alpha_cutoff>0.0:
+ spec_values["use_alpha_cutoff"] = True
+ variant += "_masked"
+ if material.instancing:
+ spec_values["use_instancing"] = True
+ variant += "_instanced"
+
+ return (variant, spec_values)
+
+ def export_material(self, material, resources):
+ from .datafile import Resource, Statement, Token
+ mat_res = Resource(material.name+".mat", "material")
+
+ if material.type!="pbr" and material.type!="unlit" and material.type!="splat":
+ raise Exception("Can't export material {} of unknown type {}".format(material.name, material.type))
+
+ mat_res.statements.append(Statement("type", Token(material.type)));
+ for p in material.properties:
+ st = self.create_property_statement(mat_res, p, resources)
+ if st:
+ mat_res.statements.append(st)
+
+ if material.sub_materials:
+ for k, s in material.array_storage.items():
+ mat_res.statements.append(Statement(k.replace("_map", "_storage"), Token(s[0]), s[1], s[2]))
+ for s in material.sub_materials:
+ st = Statement("sub")
+ for p in s.properties:
+ ss = self.create_property_statement(mat_res, p, resources, raw_texture=True)
+ if ss:
+ st.sub.append(ss)
+ mat_res.statements.append(st)
+
+ textures = [p.texture for p in itertools.chain(material.properties, *(s.properties for s in material.sub_materials)) if p.texture]
+ if textures:
+ from .export_texture import SamplerExporter
+ sampler_export = SamplerExporter()
+ mat_res.statements.append(mat_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(textures[0])]))
+ if material.alpha_cutoff>0.0:
+ mat_res.statements.append(Statement("alpha_cutoff", material.alpha_cutoff))
+
+ return mat_res
+
+ def create_property_statement(self, mat_res, prop, resources, *, raw_texture=False):
+ from .datafile import Statement
+ if prop.texture:
+ from .export_texture import TextureExporter
+ texture_export = TextureExporter()
+ tex_res = resources[texture_export.get_texture_name(prop.texture, prop.tex_channels)]
+ if raw_texture:
+ for s in tex_res.statements:
+ if s.keyword.startswith("external_data"):
+ return mat_res.create_reference_statement(prop.tex_keyword, s.args[0])
+ elif s.keyword.startswith("external_image"):
+ return Statement(prop.tex_keyword, s.args[0])
+ return mat_res.create_reference_statement(prop.tex_keyword, tex_res)
+ elif not prop.keyword:
+ return
+ elif type(prop.value)==tuple:
+ return Statement(prop.keyword, *prop.value)
+ else:
+ return Statement(prop.keyword, prop.value)
+
+ def export_shader(self, name, module, spec_values, resources):
+ from .datafile import Resource, Statement
+ shader_res = Resource(name, "shader")