Node: Mix node

This patch is a response to T92588 and is implemented
as a Function/Shader node.

This node has support for Float, Vector and Color data types.

For Vector it supports uniform and non-uniform mixing.

For Color it now has the option to remove factor clamping.

It replaces the Mix RGB for Shader and Geometry node trees.

As discussed in T96219, this patch converts existing nodes
in .blend files. The old node is still available in the
Python API but hidden from the menus.

Reviewed By: HooglyBoogly, JacquesLucke, simonthommes, brecht

Maniphest Tasks: T92588

Differential Revision: https://developer.blender.org/D13749

1 files changed, 54 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 1573a1df002..60a57bae78a 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -4927,6 +4927,54 @@ static void def_compare(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
 }
 
+static void def_sh_mix(StructRNA *srna)
+{
+  static const EnumPropertyItem rna_enum_mix_data_type_items[] = {
+      {SOCK_FLOAT, "FLOAT", 0, "Float", ""},
+      {SOCK_VECTOR, "VECTOR", 0, "Vector", ""},
+      {SOCK_RGBA, "RGBA", 0, "Color", ""},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  static const EnumPropertyItem rna_enum_mix_mode_items[] = {
+      {NODE_MIX_MODE_UNIFORM, "UNIFORM", 0, "Uniform", "Use a single factor for all components"},
+      {NODE_MIX_MODE_NON_UNIFORM, "NON_UNIFORM", 0, "Non-Uniform", "Per component factor"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  PropertyRNA *prop;
+
+  RNA_def_struct_sdna_from(srna, "NodeShaderMix", "storage");
+
+  prop = RNA_def_property(srna, "data_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, rna_enum_mix_data_type_items);
+  RNA_def_property_enum_default(prop, SOCK_FLOAT);
+  RNA_def_property_ui_text(prop, "Data Type", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+
+  prop = RNA_def_property(srna, "factor_mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, rna_enum_mix_mode_items);
+  RNA_def_property_enum_default(prop, SOCK_FLOAT);
+  RNA_def_property_ui_text(prop, "Factor Mode", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+
+  prop = RNA_def_property(srna, "blend_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "blend_type");
+  RNA_def_property_enum_items(prop, rna_enum_ramp_blend_items);
+  RNA_def_property_ui_text(prop, "Blending Mode", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+
+  prop = RNA_def_property(srna, "clamp_factor", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "clamp_factor", 1);
+  RNA_def_property_ui_text(prop, "Clamp Factor", "Clamp the factor to [0,1] range");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+
+  prop = RNA_def_property(srna, "clamp_result", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "clamp_result", 1);
+  RNA_def_property_ui_text(prop, "Clamp Result", "Clamp the result to [0,1] range");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+}
+
 static void def_float_to_int(StructRNA *srna)
 {
   PropertyRNA *prop;
@@ -10964,6 +11012,12 @@ static void rna_def_node_socket(BlenderRNA *brna)
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
   RNA_def_property_ui_text(prop, "Linked", "True if the socket is connected");
 
+  prop = RNA_def_property(srna, "is_unavailable", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", SOCK_UNAVAIL);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_ui_text(
+      prop, "Unavailable", "True if the socket is unavailable");
+
   prop = RNA_def_property(srna, "is_multi_input", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "flag", SOCK_MULTI_INPUT);
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);