Added an option "Cast Approximate" to control if a material should cast

shadow when using approximate AO, separate from "Traceable".

release/scripts/ui/properties_material.py

@@ -334,7 +334,7 @@ class MATERIAL_PT_shadow(MaterialButtonsPanel):
         sub = col.column()
         sub.active = (not mat.ray_shadow_bias)
         sub.prop(mat, "shadow_ray_bias", text="Ray Bias")
-
+        col.prop(mat, "cast_approximate")
 
 class MATERIAL_PT_diffuse(MaterialButtonsPanel):
     bl_label = "Diffuse"

source/blender/blenkernel/BKE_blender.h

@@ -43,7 +43,7 @@ struct bContext;
 struct ReportList;
 
 #define BLENDER_VERSION			250
-#define BLENDER_SUBVERSION		16
+#define BLENDER_SUBVERSION		17
 
 #define BLENDER_MINVERSION		250
 #define BLENDER_MINSUBVERSION	0

source/blender/blenkernel/intern/material.c

@@ -188,7 +188,7 @@ void init_material(Material *ma)
 	ma->vol.ms_diff = 1.f;
 	ma->vol.ms_intensity = 1.f;
 	
-	ma->mode= MA_TRACEBLE|MA_SHADBUF|MA_SHADOW|MA_RAYBIAS|MA_TANGENT_STR|MA_ZTRANSP;
+	ma->mode= MA_TRACEBLE|MA_SHADBUF|MA_SHADOW|MA_RAYBIAS|MA_TANGENT_STR|MA_ZTRANSP|MA_APPROX_OCCLUSION;
 
 	ma->preview = NULL;
 }

source/blender/blenloader/intern/readfile.c

@@ -10563,10 +10563,10 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		}
 	}
 	
-	/* put 2.50 compatibility code here until next subversion bump */
+	if (main->versionfile < 250 || (main->versionfile == 250 && main->subversionfile < 17)) {
-	{
 		Scene *sce;
 		Sequence *seq;
+		Material *ma;
 
 		/* initialize to sane default so toggling on border shows something */
 		for(sce = main->scene.first; sce; sce = sce->id.next) {
@@ -10587,6 +10587,10 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 			SEQ_END
 		}
 
+		for(ma = main->mat.first; ma; ma=ma->id.next)
+			if(ma->mode & MA_TRACEBLE)
+				ma->shade_flag |= MA_APPROX_OCCLUSION;
+
 		/* sequencer changes */
 		{
 			bScreen *screen;
@@ -10621,6 +10625,10 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		} /* sequencer changes */
 	}
 
+	/* put 2.50 compatibility code here until next subversion bump */
+	{
+	}
+
 	/* WATCH IT!!!: pointers from libdata have not been converted yet here! */
 	/* WATCH IT 2!: Userdef struct init has to be in editors/interface/resources.c! */
 

source/blender/makesdna/DNA_material_types.h

@@ -234,6 +234,7 @@ typedef struct Material {
 /* shade_flag */
 #define MA_CUBIC			1
 #define MA_OBCOLOR			2
+#define MA_APPROX_OCCLUSION	4
 
 /* diff_shader */
 #define MA_DIFF_LAMBERT		0

source/blender/makesrna/intern/rna_material.c

@@ -1649,6 +1649,11 @@ void RNA_def_material(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Cast Buffer Shadows", "Allow this material to cast shadows from shadow buffer lamps");
 	RNA_def_property_update(prop, 0, "rna_Material_update");
 
+	prop= RNA_def_property(srna, "cast_approximate", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "shade_flag", MA_APPROX_OCCLUSION);
+	RNA_def_property_ui_text(prop, "Cast Approximate", "Allow this material to cast shadows when using approximate ambient occlusion.");
+	RNA_def_property_update(prop, 0, "rna_Material_update");
+	
 	prop= RNA_def_property(srna, "tangent_shading", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "mode", MA_TANGENT_V);
 	RNA_def_property_ui_text(prop, "Tangent Shading", "Use the material's tangent vector instead of the normal for shading - for anisotropic shading effects");

source/blender/render/intern/source/occlusion.c

@@ -629,6 +629,7 @@ static OcclusionTree *occ_tree_build(Render *re)
 	OcclusionTree *tree;
 	ObjectInstanceRen *obi;
 	ObjectRen *obr;
+	Material *ma;
 	VlakRen *vlr= NULL;
 	int a, b, c, totface;
 
@@ -640,7 +641,9 @@ static OcclusionTree *occ_tree_build(Render *re)
 			if((a & 255)==0) vlr= obr->vlaknodes[a>>8].vlak;
 			else vlr++;
 
-			if((vlr->mat->mode & MA_TRACEBLE) && (vlr->mat->material_type == MA_TYPE_SURFACE))
+			ma= vlr->mat;
+
+			if((ma->shade_flag & MA_APPROX_OCCLUSION) && (ma->material_type == MA_TYPE_SURFACE))
 				totface++;
 		}
 	}
@@ -677,7 +680,9 @@ static OcclusionTree *occ_tree_build(Render *re)
 			if((a & 255)==0) vlr= obr->vlaknodes[a>>8].vlak;
 			else vlr++;
 
-			if((vlr->mat->mode & MA_TRACEBLE) && (vlr->mat->material_type == MA_TYPE_SURFACE)) {
+			ma= vlr->mat;
+
+			if((ma->shade_flag & MA_APPROX_OCCLUSION) && (ma->material_type == MA_TYPE_SURFACE)) {
 				tree->face[b].obi= c;
 				tree->face[b].facenr= a;
 				tree->occlusion[b]= 1.0f;