Threaded VBO creation.

A secondary memory-mapped VBO is filled in a separate thread, which
replaces the main VBO when work is done.

1 files changed, 17 insertions, 0 deletions

diff --git a/quadtree.h b/quadtree.h
index 951a98e..b927dee 100644
--- a/quadtree.h
+++ b/quadtree.h
@@ -3,8 +3,18 @@
 
 #include "vector.h"
 
+#include <boost/thread.hpp>
+
 class Quadtree {
 	public:
+
+		struct UpdateThread {
+			Quadtree *tree;
+			float *buffer;
+			UpdateThread(Quadtree *t, float *b);
+			void operator()();
+		};
+
 		struct QuadNode {
 			Quadtree *tree;
 			QuadNode *parent;
@@ -29,9 +39,15 @@ class Quadtree {
 		};
 
 		float *heights;
+		float *thread_buffer;
+		size_t buf_size;
+		bool thread_done, thread_running;
+		boost::mutex vbo_lock;
+		boost::mutex node_lock;
 		int width, height, levels;
 		float init_time;
 		QuadNode *root;
+		unsigned int temp_vbo;
 		unsigned int vbo_object;
 		unsigned int nodes;
 		unsigned int vertices;
@@ -43,6 +59,7 @@ class Quadtree {
 		void create_nodes(int levels);
 		unsigned int count_nodes();
 		void make_vbo();
+		void update_vbo();
 		QuadNode *find(float x, float y, int level = -1);
 		QuadNode *get_left(QuadNode *node);
 		QuadNode *get_right(QuadNode *node);