- add template for defining custom driver functions.

- comment unused assignments.

GNUmakefile

@@ -233,7 +233,7 @@ check_sparse:
 doc_py:
 	$(BUILD_DIR)/bin/blender --background --factory-startup --python doc/python_api/sphinx_doc_gen.py
 	cd doc/python_api ; sphinx-build -n -b html sphinx-in sphinx-out
-	@echo "docs written into: 'doc/python_api/sphinx-out/index.html'"
+	@echo "docs written into: '$(BLENDER_DIR)/doc/python_api/sphinx-out/contents.html'"
 
 
 clean:

release/scripts/templates/driver_functions.py

@@ -0,0 +1,34 @@
+# This script defines functions to be used directly in drivers expressions to
+# extend the builtin set of python functions.
+#
+# This can be executed on manually or set to 'Register' to
+# initialize thefunctions on file load.
+
+
+# two sample functions
+def invert(f):
+    """ Simple function call:
+
+            invert(val)
+    """
+    return 1.0 - f
+
+
+uuid_store = {}
+
+def slow_value(value, fac, uuid):
+    """ Delay the value by a factor, use a unique string to allow
+        use in multiple drivers without conflict:
+
+            slow_value(val, 0.5, "my_value")
+    """
+    value_prev = uuid_store.get(uuid, value)
+    uuid_store[uuid] = value_new = (value_prev * fac) + (value * (1.0 - fac))
+    return value_new
+
+
+import bpy
+
+# Add variable defined in this script into the drivers namespace.
+bpy.app.driver_namespace["invert"] = invert
+bpy.app.driver_namespace["slow_value"] = slow_value

source/blender/nodes/intern/node_exec.c

@@ -180,7 +180,7 @@ bNodeTreeExec *ntree_exec_begin(bNodeTree *ntree)
 	
 	/* prepare group tree inputs */
 	for (sock=ntree->inputs.first; sock; sock=sock->next) {
-		ns = setup_stack(exec->stack, sock);
+		/* ns = */ setup_stack(exec->stack, sock);
 	}
 	/* prepare all internal nodes for execution */
 	for(n=0, nodeexec= exec->nodeexec; n < totnodes; ++n, ++nodeexec) {
@@ -198,7 +198,7 @@ bNodeTreeExec *ntree_exec_begin(bNodeTree *ntree)
 		
 		/* tag all outputs */
 		for (sock=node->outputs.first; sock; sock=sock->next) {
-			ns = setup_stack(exec->stack, sock);
+			/* ns = */ setup_stack(exec->stack, sock);
 		}
 		
 		if(node->typeinfo->initexecfunc)