Initial commit

Torque/SDK/engine/interior/lightUpdateGrouper.cc

@@ -0,0 +1,75 @@
+//-----------------------------------------------------------------------------
+// Torque Game Engine
+// Copyright (C) GarageGames.com, Inc.
+//-----------------------------------------------------------------------------
+
+#include "interior/lightUpdateGrouper.h"
+
+LightUpdateGrouper::LightUpdateGrouper(const U32 bitStart, const U32 bitEnd)
+{
+   AssertFatal(bitEnd >= bitStart, "Error, bitend must be greater than bit start");
+   AssertFatal(bitEnd < 32, "Error, bitend too large.  must be in the range 0..31");
+
+   mBitStart = bitStart;
+   mBitEnd   = bitEnd;
+}
+
+
+LightUpdateGrouper::~LightUpdateGrouper()
+{
+   mBitStart = 0xFFFFFFFF;
+   mBitEnd   = 0xFFFFFFFF;
+}
+
+
+void LightUpdateGrouper::addKey(const U32 key)
+{
+#ifdef TORQUE_DEBUG
+   for (U32 i = 0; i < mKeys.size(); i++)
+      AssertFatal(mKeys[i] != key, "Error, key already in the array!");
+#endif
+
+   mKeys.push_back(key);
+}
+
+U32 LightUpdateGrouper::getKeyMask(const U32 key) const
+{
+   U32 numBits = mBitEnd - mBitStart + 1;
+   for (U32 i = 0; i < mKeys.size(); i++) {
+      if (mKeys[i] == key) {
+         U32 idx = i % numBits;
+         return (1 << (idx + mBitStart));
+      }
+   }
+
+   AssertFatal(false, "Error, key not in the array!");
+   return 0;
+}
+
+LightUpdateGrouper::BitIterator LightUpdateGrouper::begin()
+{
+   BitIterator itr;
+   itr.mGrouper = this;
+   itr.mCurrBit = mBitStart;
+   itr.resetKeyArray();
+
+   return itr;
+}
+
+void LightUpdateGrouper::BitIterator::resetKeyArray()
+{
+   mKeyArray.clear();
+   if (valid() == false)
+      return;
+
+   // Ok, we need to select out every (mBitEnd - mBitStart - 1)th key,
+   //  starting at mCurrBit.
+
+   U32 numBits = mGrouper->mBitEnd - mGrouper->mBitStart + 1;
+   U32 numKeys = mGrouper->mKeys.size();
+
+   for (U32 i = mCurrBit - mGrouper->mBitStart; i < numKeys; i += numBits) {
+      mKeyArray.push_back(mGrouper->mKeys[i]);
+   }
+}
+