+ from .datafile import Resource, Statement, Token
+ tech_res = Resource(material.name+".tech", "technique")
+
+ mat_res = resources[material.name+".mat"]
+
+ blend_st = None
+ if material.blend_type=='ALPHA':
+ blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE_MINUS_SRC_ALPHA"))
+ elif material.blend_type=='ADDITIVE':
+ blend_st = Statement("blend", Token("ONE"), Token("ONE"))
+ elif material.blend_type=='ADDITIVE_ALPHA':
+ blend_st = Statement("blend", Token("SRC_ALPHA"), Token("ONE"))
+
+ if material.render_mode=='CUSTOM':
+ for m in material.render_methods:
+ st = Statement("method", m.tag)
+ if mat_res and m.use_material:
+ st.sub.append(tech_res.create_reference_statement("material", mat_res))
+
+ if m.tag=="blended" and blend_st:
+ st.sub.append(blend_st)
+
+ shader = m.shader
+ if shader.endswith(".glsl"):
+ shader += ".shader"
+ st.sub.append(Statement("shader", shader))
+
+ if material.uniforms:
+ ss = Statement("uniforms")
+ for u in material.uniforms:
+ ss.sub.append(Statement("uniform", u.name, *u.values[:u.size]))
+ st.sub.append(ss)
+
+ if material.face_cull=='BACK':
+ st.sub.append(Statement("face_cull", Token("CULL_BACK")))
+
+ tech_res.statements.append(st)
+ else:
+ base_method = "blended" if material.blend_type!='NONE' else ""
+ st = Statement("method", base_method)
+ if mat_res:
+ st.sub.append(tech_res.create_embed_statement("material", mat_res))
+
+ if blend_st:
+ st.sub.append(blend_st)
+ elif material.alpha_cutoff>0.0:
+ ss = Statement("blend")
+ ss.sub.append(Statement("alpha_to_coverage", True))
+ st.sub.append(ss)
+ if material.receive_shadows:
+ st.sub.append(Statement("receive_shadows", True))
+ if material.image_based_lighting:
+ st.sub.append(Statement("image_based_lighting", True))
+ if material.instancing:
+ st.sub.append(Statement("instancing", True))
+ if material.face_cull=='BACK':
+ st.sub.append(Statement("face_cull", Token("CULL_BACK")))
+
+ tech_res.statements.append(st)
+
+ if material.cast_shadows:
+ tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, False));
+ tech_res.statements.append(self.create_shadow_method(tech_res, material, resources, True));
+
+ return tech_res
+
+ def create_shadow_method(self, tech_res, material, resources, thsm):
+ from .datafile import Statement, Token
+
+ occluder_variant, occluder_spec_values = self.get_occluder_shader_variant(material, thsm)
+
+ shader_stem = "occluder{}.shader" if occluder_spec_values else "occluder{}.glsl.shader"
+ shader_name = shader_stem.format(occluder_variant)
+
+ st = Statement("method", "shadow"+("_thsm" if thsm else ""))
+ if occluder_spec_values:
+ st.sub.append(tech_res.create_reference_statement("shader", resources[shader_name]))
+ else:
+ st.sub.append(Statement("shader", shader_name))
+
+ if occluder_spec_values.get("use_alpha_cutoff"):
+ ss = Statement("texture", "alpha_map")
+
+ from .export_texture import TextureExporter
+ from .export_texture import SamplerExporter
+ texture_export = TextureExporter()
+ sampler_export = SamplerExporter()
+
+ color_prop = material.properties[0]
+ tex_res = resources[texture_export.get_texture_name(color_prop.texture, color_prop.tex_channels)]
+ ss.sub.append(tech_res.create_reference_statement("texture", tex_res))
+ ss.sub.append(tech_res.create_reference_statement("sampler", resources[sampler_export.get_sampler_name(color_prop.texture)]))
+ st.sub.append(ss)
+
+ ss = Statement("uniforms")
+ ss.sub.append(Statement("uniform", "alpha_cutoff", material.alpha_cutoff))
+ st.sub.append(ss)
+
+ if material.face_cull=='BACK':
+ st.sub.append(Statement("face_cull", Token("CULL_BACK")))
+
+ return st;
+
+ def get_occluder_shader_variant(self, material, thsm):
+ variant = ""
+ if thsm:
+ variant += "_thsm"
+
+ spec_values = {}
+
+ color_prop = material.properties[0]
+ 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)