From 7a9925f982e43fcc1d798318905d83b5805b12cc Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Fri, 17 Feb 2012 18:24:34 +0000
Subject: Added the skeleton of the cLightingThread object

git-svn-id: http://mc-server.googlecode.com/svn/trunk@286 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/LightingThread.cpp | 114 ++++++++++++++++++++++++++++++++++++++++++++++
 source/LightingThread.h   |  82 +++++++++++++++++++++++++++++++++
 2 files changed, 196 insertions(+)
 create mode 100644 source/LightingThread.cpp
 create mode 100644 source/LightingThread.h

(limited to 'source')

diff --git a/source/LightingThread.cpp b/source/LightingThread.cpp
new file mode 100644
index 000000000..e70dc252e
--- /dev/null
+++ b/source/LightingThread.cpp
@@ -0,0 +1,114 @@
+
+// LightingThread.cpp
+
+// Implements the cLightingThread class representing the thread that processes requests for lighting
+
+#include "Globals.h"
+#include "LightingThread.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cLightingThread:
+
+cLightingThread::cLightingThread(void) :
+	super("cLightingThread")
+{
+}
+
+
+
+
+
+cLightingThread::~cLightingThread()
+{
+	Stop();
+}
+
+
+
+
+
+void cLightingThread::Stop(void)
+{
+	{
+		cCSLock Lock(m_CS);
+		for (cLightingBufferQueue::iterator itr = m_Queue.begin(); itr != m_Queue.end(); ++itr)
+		{
+			delete *itr;
+		}  // for itr - m_Queue[]
+	}
+	mShouldTerminate = true;
+	m_Event.Set();
+	
+	Wait();
+}
+
+
+
+
+
+void cLightingThread::QueueLighting(cWorld * a_World, int a_MinX, int a_MaxX, int a_MinY, int a_MaxY, int a_MinZ, int a_MaxZ)
+{
+	// TODO
+}
+
+
+
+
+
+void cLightingThread::Execute(void)
+{
+	// TODO
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cLightingThread::cLightingBuffer:
+
+cLightingThread::cLightingBuffer::cLightingBuffer(int a_MinX, int a_MaxX, int a_MinY, int a_MaxY, int a_MinZ, int a_MaxZ) :
+	m_MinX(a_MinX), 
+	m_MaxX(a_MaxX),
+	m_MinY(a_MinY),
+	m_MaxY(a_MaxY),
+	m_MinZ(a_MinZ),
+	m_MaxZ(a_MaxZ)
+{
+	// TODO: initialize strides
+}
+
+
+
+
+
+void cLightingThread::cLightingBuffer::GetFromWorld(cWorld * a_World)
+{
+	// TODO: Set m_BlockData, m_SkyLight and m_BlockLight from the world's chunks
+}
+
+
+
+
+
+void cLightingThread::cLightingBuffer::SetToWorld  (cWorld * a_World)
+{
+	// TODO: Set world's chunks from m_BlockData, m_SkyLight and m_BlockLight
+}
+
+
+
+
+
+void cLightingThread::cLightingBuffer::Process(void)
+{
+	// TODO: Does the actual lighting on this buffer
+}
+
+
+
+
diff --git a/source/LightingThread.h b/source/LightingThread.h
new file mode 100644
index 000000000..5b60d34bf
--- /dev/null
+++ b/source/LightingThread.h
@@ -0,0 +1,82 @@
+
+// LightingThread.h
+
+// Interfaces to the cLightingThread class representing the thread that processes requests for lighting
+// Note that the world generators need direct access to the lighting methods so that they can light the generated chunk
+
+
+
+
+#pragma once
+
+#include "cIsThread.h"
+
+
+
+
+
+// fwd:
+class cWorld;
+
+
+
+
+
+class cLightingThread :
+	public cIsThread
+{
+	typedef cIsThread super;
+	
+public:
+
+	class cLightingBuffer
+	{
+	public:
+		cLightingBuffer(int m_MinX, int m_MaxX, int m_MinY, int m_MaxY, int m_MinZ, int m_MaxZ);
+
+		/// Copies the world's existing chunks into m_BlockData, m_Skylight and m_BlockLight
+		void GetFromWorld(cWorld * a_World);
+		void SetToWorld  (cWorld * a_World);
+		
+		void Process(void);  // Does the actual lighting on this buffer
+		
+	protected:
+	
+		// Block coords:
+		int m_MinX, m_MaxX;
+		int m_MinY, m_MaxY;
+		int m_MinZ, m_MaxZ;
+
+		int m_StrideX;  // = OffsetOfBlock(x, y, z) - OffsetOfBlock(x + 1, y, z)
+		int m_StrideZ;  // = OffsetOfBlock(x, y, z) - OffsetOfBlock(x,     y, z + 1)
+		
+		// These buffers actually store 1 block in each direction more than is specified in the coords
+		// This way we can throw out a lot of conditions inside the processing cycles
+		// And it allows us to light a chunk with regard to its surrounding chunks without much work
+		// (So if m_MinX is 16 and m_MaxX is 32, the buffers actually contain data for X in range from 15 to 33 (18 items)
+		char * m_BlockData;
+		char * m_SkyLight;
+		char * m_BlockLight;
+	} ;
+	
+	cLightingThread(void);
+	~cLightingThread();
+	
+	void Stop(void);
+	
+	void QueueLighting(cWorld * a_World, int a_MinX, int a_MaxX, int a_MinY, int a_MaxY, int a_MinZ, int a_MaxZ);  // queues the request
+
+protected:
+
+	typedef std::list<cLightingBuffer *> cLightingBufferQueue;
+	
+	cCriticalSection     m_CS;
+	cLightingBufferQueue m_Queue;
+	cEvent               m_Event;  // Set when queue is appended or to stop the thread
+	
+	virtual void Execute(void) override;
+} ;
+
+
+
+
-- 
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