Todo/feature request

When using masks or other simple 3D elements in composites, doing
a layer re-rendering on a node is a bit clumsy all the time.

This commit does two things to help:
- new hotkey "Z" in node editor automatically finds render layer
  that changed and re-renders it + composites
- option "Auto Render" does same, but then after every transform
  edit in 3D window

The latter is experimental; real & proper system for this requires
full threaded render support (like previews). But it works!

Demo file:
http://download.blender.org/demo/test/auto_composite.blend

Important fix:
After any render, all the render layers were tagged "changed", which
caused any edit to first totally recomposte everthing. Now it only
composites changes.

Implementation notes

- DAG scene flush now sets 'changed' flags in render layer nodes
- Added notifier for 'transform finished' to trigger the update,
  this is temporarily.

1 files changed, 16 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index f6487bf1d19..69f01633192 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -3182,10 +3182,7 @@ int ntreeCompositTagAnimated(bNodeTree *ntree)
 			NodeTagChanged(ntree, node);
 			tagged= 1;
 		}
-		else if(node->type==CMP_NODE_R_LAYERS) {
-			NodeTagChanged(ntree, node);
-			tagged= 1;
-		}
+		/* here was tag render layer, but this is called after a render, so re-composites fail */
 		else if(node->type==NODE_GROUP) {
 			if( ntreeCompositTagAnimated((bNodeTree *)node->id) ) {
 				NodeTagChanged(ntree, node);
@@ -3210,6 +3207,21 @@ void ntreeCompositTagGenerators(bNodeTree *ntree)
 	}
 }
 
+/* XXX after render animation system gets a refresh, this call allows composite to end clean */
+void ntreeClearTags(bNodeTree *ntree)
+{
+	bNode *node;
+	
+	if(ntree==NULL) return;
+	
+	for(node= ntree->nodes.first; node; node= node->next) {
+		node->need_exec= 0;
+		if(node->type==NODE_GROUP)
+			ntreeClearTags((bNodeTree *)node->id);
+	}
+}
+
+
 int ntreeTexTagAnimated(bNodeTree *ntree)
 {
 	bNode *node;