From 7c4e5613d4974e440afa9cc47e06972f255a506f Mon Sep 17 00:00:00 2001
From: dooglus <dooglus@1f10aa63-cdf2-0310-b900-c93c546f37ac>
Date: Fri, 21 Dec 2007 16:40:31 +0000
Subject: [PATCH] When cloning a 'random' valuenode with a constant,
 non-exported seed, use a new random seed.

git-svn-id: http://svn.voria.com/code@1224 1f10aa63-cdf2-0310-b900-c93c546f37ac
---
 .../src/modules/mod_noise/valuenode_random.cpp     | 22 ++++++++++++++++++++++
 .../trunk/src/modules/mod_noise/valuenode_random.h |  4 ++++
 2 files changed, 26 insertions(+)

diff --git a/synfig-core/trunk/src/modules/mod_noise/valuenode_random.cpp b/synfig-core/trunk/src/modules/mod_noise/valuenode_random.cpp
index 3bf6ab4..24bfe23 100644
--- a/synfig-core/trunk/src/modules/mod_noise/valuenode_random.cpp
+++ b/synfig-core/trunk/src/modules/mod_noise/valuenode_random.cpp
@@ -275,3 +275,25 @@ ValueNode_Random::check_type(ValueBase::Type type)
 		type==ValueBase::TYPE_TIME		||
 		type==ValueBase::TYPE_VECTOR	;
 }
+
+ValueNode*
+ValueNode_Random::clone(const GUID& deriv_guid)const
+{
+	ValueNode_Random* ret = (ValueNode_Random*)LinkableValueNode::clone(deriv_guid);
+	ret->randomize_seed();
+	return ret;
+}
+
+void
+ValueNode_Random::randomize_seed()
+{
+	int i = get_link_index_from_name("seed");
+	ValueNode::Handle link = get_link_vfunc(i);
+	if(!link->is_exported() && link->get_name() == "constant")
+	{
+		int seed = time(NULL) + rand();
+		if (seed < 0) seed = -seed;
+		random.set_seed(seed);
+		set_link(i, ValueNode_Const::create(seed));
+	}
+}
diff --git a/synfig-core/trunk/src/modules/mod_noise/valuenode_random.h b/synfig-core/trunk/src/modules/mod_noise/valuenode_random.h
index 98a167e..d1818d1 100644
--- a/synfig-core/trunk/src/modules/mod_noise/valuenode_random.h
+++ b/synfig-core/trunk/src/modules/mod_noise/valuenode_random.h
@@ -68,6 +68,10 @@ public:
 	virtual String link_local_name(int i)const;
 	virtual int get_link_index_from_name(const String &name)const;
 
+	virtual ValueNode* clone(const GUID& deriv_guid=GUID())const;
+
+	void randomize_seed();
+
 protected:
 	LinkableValueNode* create_new()const;
 	virtual bool set_link_vfunc(int i,ValueNode::Handle x);
-- 
2.7.4