Recognize a certain configuration of nodes as inverting Y for normals

[libs/gl.git] / blender / io_mspgl / material.py

diff --git a/blender/io_mspgl/material.py b/blender/io_mspgl/material.py
index 5e06fd8aa061ef83ca9540b1d97163657d0011be..cadfe75e09b5ef4589da97a5e99c8caec34e3538 100644 (file)
--- a/blender/io_mspgl/material.py
+++ b/blender/io_mspgl/material.py
@@ -8,6 +8,33 @@ def get_linked_node_and_socket(node_tree, socket):
                        return (l.to_node, l.to_socket)
        return (None, None)
 
+def check_group(node_tree, group, func):
+       output = group.node_tree.nodes["Group Output"]
+       from_node, _ = get_linked_node_and_socket(group.node_tree, output.inputs[0])
+       if from_node:
+               from_node, _ = func(group.node_tree, from_node)
+               if from_node and from_node.type=='GROUP_INPUT':
+                       return get_linked_node_and_socket(node_tree, group.inputs[0])
+       return (None, None)
+
+def check_invert_green(node_tree, node):
+       if node.type=='GROUP':
+               return check_group(node_tree, node, check_invert_green)
+       elif node.type!='COMBRGB':
+               return (None, None)
+
+       green, g_sock = get_linked_node_and_socket(node_tree, node.inputs["G"])
+       if not green or green.type!='MATH' or green.operation!='SUBTRACT':
+               return (None, None)
+       green, g_sock = get_linked_node_and_socket(node_tree, green.inputs[1])
+
+       red, r_sock = get_linked_node_and_socket(node_tree, node.inputs["R"])
+       blue, b_sock = get_linked_node_and_socket(node_tree, node.inputs["B"])
+       if not red or red.type!='SEPRGB' or blue!=red or green!=red:
+               return (None, None)
+
+       return get_linked_node_and_socket(node_tree, red.inputs["Image"])
+
 class MaterialProperty:
        def __init__(self, keyword, tex_keyword, value):
                self.keyword = keyword
@@ -15,6 +42,7 @@ class MaterialProperty:
                self.value = value
                self.texture = None
                self.tex_usage = None
+               self.invert_green = False
 
        def set_from_input(self, node_tree, input_socket, alpha_socket=None):
                if self.keyword:
@@ -30,8 +58,14 @@ class MaterialProperty:
                        from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
                        alpha_from = None
                        if from_node:
+                               usage = None
                                if from_node.type=='NORMAL_MAP':
                                        from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
+                                       invert, _ = check_invert_green(node_tree, from_node)
+                                       if invert:
+                                               from_node = invert
+                                               self.invert_green = True
+                                       usage = 'RGB'
                                elif from_node.type=='RGBTOBW':
                                        from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
 
@@ -42,7 +76,9 @@ class MaterialProperty:
 
                                if from_node.type=='TEX_IMAGE':
                                        self.texture = from_node
-                                       if alpha_from:
+                                       if usage:
+                                               self.tex_usage = usage
+                                       elif alpha_from:
                                                self.tex_usage = 'RGBA'
                                        elif type(self.value)==tuple:
                                                self.tex_usage = 'RGB'
@@ -86,7 +122,7 @@ class Material:
                        base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
                        metalness = self.create_property("metalness", 0.0)
                        roughness = self.create_property("roughness", 0.5)
-                       normal = self.create_property("normal")
+                       normal = self.create_property("normal_map")
                        emission = self.create_property("emission", (0.0, 0.0, 0.0))
 
                        base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])