+ 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)