Game Engine: Level of detail support and tools

Levels of detail can be added and modified in the object panel. The object
panel also contains new tools for generating levels of detail, setting up
levels of detail based on object names (useful for importing), and
clearing an object's level of detail settings. This is meant as a game
engine feature, though the level of details settings can be previewed in
the viewport.

Reviewed By: moguri, nexyon, brecht

Differential Revision: http://developer.blender.org/D109

1 files changed, 49 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_object.c b/source/blender/makesrna/intern/rna_object.c
index 9c1d0c4cc2b..40bea3a6051 100644
--- a/source/blender/makesrna/intern/rna_object.c
+++ b/source/blender/makesrna/intern/rna_object.c
@@ -40,6 +40,7 @@
 #include "DNA_meta_types.h"
 
 #include "BLI_utildefines.h"
+#include "BLI_listbase.h"
 
 #include "BKE_paint.h"
 #include "BKE_editmesh.h"
@@ -1471,6 +1472,11 @@ int rna_Object_use_dynamic_topology_sculpting_get(PointerRNA *ptr)
 	return (ss && ss->bm);
 }
 
+static void rna_Object_lod_distance_update(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+	Object *ob = (Object *)ptr->id.data;
+	BKE_object_lod_sort(ob);
+}
 #else
 
 static void rna_def_vertex_group(BlenderRNA *brna)
@@ -2030,6 +2036,41 @@ static void rna_def_object_vertex_groups(BlenderRNA *brna, PropertyRNA *cprop)
 }
 
 
+static void rna_def_object_lodlevel(BlenderRNA* brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+
+	srna = RNA_def_struct(brna, "LodLevel", NULL);
+	RNA_def_struct_sdna(srna, "LodLevel");
+
+	prop = RNA_def_property(srna, "distance", PROP_FLOAT, PROP_DISTANCE);
+	RNA_def_property_float_sdna(prop, NULL, "distance");
+	RNA_def_property_range(prop, 0.0, FLT_MAX);
+	RNA_def_property_ui_text(prop, "Distance", "Distance to begin using this level of detail");
+	RNA_def_property_update(prop, NC_OBJECT|ND_LOD, "rna_Object_lod_distance_update");
+
+	prop = RNA_def_property(srna, "object", PROP_POINTER, PROP_NONE);
+	RNA_def_property_pointer_sdna(prop, NULL, "source");
+	RNA_def_property_struct_type(prop, "Object");
+	RNA_def_property_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Object", "Object to use for this level of detail");
+	RNA_def_property_update(prop, NC_OBJECT|ND_LOD, NULL);
+
+	prop = RNA_def_property(srna, "use_mesh", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flags", OB_LOD_USE_MESH);
+	RNA_def_property_ui_text(prop, "Use Mesh", "Use the mesh from this object at this level of detail");
+	RNA_def_property_ui_icon(prop, ICON_MESH_DATA, 0);
+	RNA_def_property_update(prop, NC_OBJECT|ND_LOD, NULL);
+
+	prop = RNA_def_property(srna, "use_material", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flags", OB_LOD_USE_MAT);
+	RNA_def_property_ui_text(prop, "Use Material", "Use the material from this object at this level of detail");
+	RNA_def_property_ui_icon(prop, ICON_MATERIAL, 0);
+	RNA_def_property_update(prop, NC_OBJECT|ND_LOD, NULL);
+}
+
+
 static void rna_def_object(BlenderRNA *brna)
 {
 	StructRNA *srna;
@@ -2690,6 +2731,13 @@ static void rna_def_object(BlenderRNA *brna)
 	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Dynamic Topology Sculpting", NULL);
 
+	/* Levels of Detail */
+	prop = RNA_def_property(srna, "lod_levels", PROP_COLLECTION, PROP_NONE);
+	RNA_def_property_collection_sdna(prop, NULL, "lodlevels", NULL);
+	RNA_def_property_struct_type(prop, "LodLevel");
+	RNA_def_property_ui_text(prop, "Level of Detail Levels", "A collection of detail levels to automatically switch between");
+	RNA_def_property_update(prop, NC_OBJECT|ND_LOD, NULL);
+
 	RNA_api_object(srna);
 }
 
@@ -2800,6 +2848,7 @@ void RNA_def_object(BlenderRNA *brna)
 	rna_def_material_slot(brna);
 	rna_def_dupli_object(brna);
 	RNA_define_animate_sdna(true);
+	rna_def_object_lodlevel(brna);
 }
 
 #endif