From 9656026f49b0063e035825fec2a96e17b6de93af Mon Sep 17 00:00:00 2001 From: Mikko Rasa Date: Sat, 16 Oct 2021 15:54:11 +0300 Subject: [PATCH] Recognize additional blend types in the Blender exporter --- blender/io_mspgl/export_material.py | 8 +++-- blender/io_mspgl/material.py | 47 ++++++++++++++++++++++++----- 2 files changed, 46 insertions(+), 9 deletions(-) diff --git a/blender/io_mspgl/export_material.py b/blender/io_mspgl/export_material.py index 6a194dfb..826ab926 100644 --- a/blender/io_mspgl/export_material.py +++ b/blender/io_mspgl/export_material.py @@ -7,8 +7,12 @@ def create_technique_resource(material, resources): mat_res = resources[material.name+".mat"] blend_st = None - if material.blended: + 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: @@ -32,7 +36,7 @@ def create_technique_resource(material, resources): tech_res.statements.append(st) else: - base_method = "blended" if material.blended 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)) diff --git a/blender/io_mspgl/material.py b/blender/io_mspgl/material.py index 88e251b8..bb8bd80b 100644 --- a/blender/io_mspgl/material.py +++ b/blender/io_mspgl/material.py @@ -39,12 +39,27 @@ def check_invert_green(node_tree, node): return get_linked_node_and_socket(node_tree, red.inputs["Image"]) -def get_unlit_inputs(node_tree, node): +def check_additive_blend(node_tree, node): if node.type=='GROUP': - return check_group(node_tree, node, get_unlit_inputs) - elif node.type=='MIX_SHADER': + return check_group(node_tree, node, check_additive_blend) + elif node.type=='ADD_SHADER': from .util import get_linked_node_and_socket + shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[0]) + shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[1]) + if shader1.type=='BSDF_TRANSPARENT': + return get_linked_node_and_socket(node_tree, node.inputs[1]) + elif shader2.type=='BSDF_TRANSPARENT': + return get_linked_node_and_socket(node_tree, node.inputs[0]) + + return (None, None) + +def get_unlit_inputs(node_tree, node, additive): + from .util import get_linked_node_and_socket + + if node.type=='GROUP': + return check_group(node_tree, node, get_unlit_inputs) + elif node.type=='MIX_SHADER' and not additive: shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[1]) shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[2]) if shader1.type=='BSDF_TRANSPARENT' and shader2.type=='EMISSION': @@ -55,7 +70,17 @@ def get_unlit_inputs(node_tree, node): if factor_from==color_from: return (color_input, factor_input) elif node.type=='EMISSION': - return (node.inputs["Color"], None) + color_input = node.inputs["Color"] + if additive: + color_from, _ = get_linked_node_and_socket(node_tree, color_input) + if color_from.type=='MIX_RGB' and color_from.blend_type=='MIX': + mix_factor_input = color_from.inputs["Fac"] + mix_factor_from, _ = get_linked_node_and_socket(node_tree, mix_factor_input) + mix_color_input = color_from.inputs["Color2"] + mix_color_from, _ = get_linked_node_and_socket(node_tree, mix_color_input) + if mix_factor_from==mix_color_from: + return (mix_color_input, mix_factor_input) + return (color_input, None) return (None, None) class MaterialProperty: @@ -124,7 +149,7 @@ class Material: self.uniforms = material.uniforms[:] self.receive_shadows = material.receive_shadows self.cast_shadows = (material.shadow_method!='NONE') - self.blended = (material.blend_method=='BLEND') + self.blend_type = 'ALPHA' if material.blend_method=='BLEND' else 'NONE' self.image_based_lighting = material.image_based_lighting if self.render_mode=='EXTERNAL' and not self.technique: @@ -143,7 +168,13 @@ class Material: if self.render_mode=='BUILTIN': raise Exception("Invalid configuration on material {}: Empty material with builtin rendering".format(self.name)) return - elif surface_node.type=='BSDF_PRINCIPLED': + + additive_node, _ = check_additive_blend(material.node_tree, surface_node) + if additive_node: + self.blend_type = 'ADDITIVE' + surface_node = additive_node + + if surface_node.type=='BSDF_PRINCIPLED': self.type = "pbr" base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0)) @@ -158,7 +189,7 @@ class Material: normal.set_from_input(material.node_tree, surface_node.inputs["Normal"]) emission.set_from_input(material.node_tree, surface_node.inputs["Emission"]) elif surface_node.type=='EMISSION' or surface_node.type=='MIX_SHADER': - color_input, alpha_input = get_unlit_inputs(material.node_tree, surface_node) + color_input, alpha_input = get_unlit_inputs(material.node_tree, surface_node, self.blend_type=='ADDITIVE') if not color_input: raise Exception("Unsupported configuration for unlit material {}".format(self.name)) @@ -167,6 +198,8 @@ class Material: color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0)) color.set_from_input(material.node_tree, color_input, alpha_input) + if self.blend_type=='ADDITIVE' and alpha_input: + self.blend_type = 'ADDITIVE_ALPHA' else: raise Exception("Unsupported surface node type {} on material {}".format(surface_node.type, self.name)) -- 2.43.0