BGE: Dynamically-allocated action layers

This patch removes the limitations on the number of action layers in the BGE.

BL_ActionManager currently uses a fixed array to keep track of the action layers. This patch replaces the fixed array with a map which allows for dynamic allocation of action layers. Layers (map items) are automatically removed on BL_ActionManager's update function. The maximum number of layers is roughly the value of a short. Backwards functionality is maintained and there are no changes to the Python API.

Task Discussion:
https://developer.blender.org/T39572

Author: Kevin Ednalino

Reviewers: moguri

Differential Revision: https://developer.blender.org/D491

1 files changed, 20 insertions, 2 deletions

diff --git a/source/gameengine/Ketsji/BL_ActionManager.h b/source/gameengine/Ketsji/BL_ActionManager.h
index be9097c3ca3..5b340257881 100644
--- a/source/gameengine/Ketsji/BL_ActionManager.h
+++ b/source/gameengine/Ketsji/BL_ActionManager.h
@@ -31,7 +31,12 @@
 	#include "MEM_guardedalloc.h"
 #endif
 
-#define MAX_ACTION_LAYERS 8
+#include <map>
+
+// Currently, we use the max value of a short.
+// We should switch to unsigned short; doesn't make sense to support negative layers.
+// This will also give us 64k layers instead of 32k.
+#define MAX_ACTION_LAYERS 32767
 
 class BL_Action;
 
@@ -41,7 +46,20 @@ class BL_Action;
 class BL_ActionManager
 {
 private:
-	BL_Action* m_layers[MAX_ACTION_LAYERS];
+	typedef std::map<short,BL_Action*> BL_ActionMap;
+
+	class KX_GameObject* m_obj;
+	BL_ActionMap 		 m_layers;
+
+	/**
+	 * Check if an action exists
+	 */
+	BL_Action* GetAction(short layer);
+
+	/**
+	 * Add new action with given layer
+	 */
+	BL_Action* AddAction(short layer);
 
 public:
 	BL_ActionManager(class KX_GameObject* obj);