--User changes

-Add new variations: bubbleT3D, crob, hexaplay3D, hexcrop, hexes, hexnix3D, loonie2, loonie3, nBlur, octapol and synth.
 -Allow for pre/post versions of dc_bubble, dc_cylinder and dc_linear whereas before they were omitted.
 -When saving a file with multiple embers in it, detect if time values are all the same and if so, start them at zero and increment by 1 for each ember.
 -Allow for numerous quality increases to be coalesced into one. It will pick up at the end of the current render.
 -Show selection highlight on variations tree in response to mouse hover. This makes it easier to see for which variation or param the current mouse wheel action will apply.
 -Make default temporal samples be 100, whereas before it was 1000 which was overkill.
 -Require the shift key to be held with delete for deleting an ember to prevent it from triggering when the user enters delete in the edit box.
  -This wasn't otherwise fixable without writing a lot more code.

--Bug fixes
 -EmberGenome was crashing when generating a sequence from a source file with more than 2 embers in it.
 -EmberGenome was improperly handling the first frame of a merge after the last frame of the loop.
  -These bugs were due to a previous commit. Revert parts of that commit.
 -Prevent a zoom value of less than 0 when reading from xml.
 -Slight optimization of the crescents, and mask variations, if the compiler wasn't doing it already.
 -Unique file naming was broken because it was looking for _# and the default names ended with -#.
 -Disallow renaming of an ember in the library tree to an empty string.
 -Severe bug that prevented some variations from being read correctly from params generated outside this program.
 -Severe OpenCL randomization bug. The first x coordinates of the first points in the first kernel call of the first ember of a render since the OpenCL renderer object was created were not random and were mostly -1.
 -Severe bug when populating xform selection distributions that could sometimes cause a crash due to roundoff error. Fix by using double.
 -Limit the max number of variations in a random ember to MAX_CL_VARS, which is 8. This ensures they'll look the same on CPU and GPU.
 -Prevent user from saving stylesheet to default.qss, it's a special reserved filename.

--Code changes
 -Generalize using the running sum output point inside of a variation for all cases: pre, reg and post.
 -Allow for array variables in variations where the address of each element is stored in m_Params.
 -Qualify all math functions with std::
 -No longer use our own Clamp() in OpenCL, instead use the standard clamp().
 -Redesign how functions are used in the variations OpenCL code.
 -Add tests to EmberTester to verify some of the new functionality.
 -Place more const and override qualifiers on functions where appropriate.
 -Add a global rand with a lock to be used very sparingly.
 -Use a map instead of a vector for bad param names in Xml parsing.
 -Prefix affine interpolation mode defines with "AFFINE_" to make their purpose more clear.
 -Allow for variations that change state during iteration by sending a separate copy of the ember to each rendering thread.
 -Implement this same functionality with a local struct in OpenCL. It's members are the total of all variables that need to change state within an ember.
 -Add Contains() function to Utils.h.
 -EmberRender: print names of kernels being printed with --dump_kernel option.
 -Clean up EmberTester to handle some of the recent changes.
 -Fix various casts.
 -Replace % 2 with & 1, even though the compiler was likely doing this already.
 -Add new file Variations06.h to accommodate new variations.
 -General cleanup.

Source/Ember/Iterator.h

@@ -108,12 +108,12 @@ public:
 
 		for (size_t distrib = 0; distrib < distribCount; distrib++)
 		{
-			T totalDensity = 0;
+			double totalDensity = 0;
 
 			//First find the total densities of all xforms.
 			for (i = 0; i < ember.XformCount(); i++)
 			{
-				T d = xforms[i].m_Weight;
+				double d = xforms[i].m_Weight;
 
 				if (distrib > 0)
 					d *= xforms[distrib - 1].Xaos(i);
@@ -127,14 +127,15 @@ public:
 
 			//Calculate how much of a fraction of a the total density each element represents.
 			size_t j = 0;
-			T tempDensity = 0, currentDensityLimit = 0, densityPerElement = totalDensity / CHOOSE_XFORM_GRAIN;
+			//These must be double, else roundoff error will prevent the last element of m_XformDistributions from being set.
+			double tempDensity = 0, currentDensityLimit = 0, densityPerElement = totalDensity / CHOOSE_XFORM_GRAIN;
 
 			//Assign xform indices in order to each element of m_XformDistributions.
 			//The number of elements assigned a given index is proportional to that xform's
 			//density relative to the sum of all densities.
 			for (i = 0; i < ember.XformCount(); i++)
 			{
-				T temp = xforms[i].m_Weight;
+				double temp = xforms[i].m_Weight;
 
 				if (distrib > 0)
 					temp *= xforms[distrib - 1].Xaos(i);
@@ -145,6 +146,11 @@ public:
 				//Also check that j is within the bounds of the distribution array just to be safe in the case of a rounding error.
 				while (tempDensity < currentDensityLimit && j < CHOOSE_XFORM_GRAIN)
 				{
+#ifdef _DEBUG
+					//Ensure distribution contains no out of bounds indices.
+					if (byte(i) >= ember.XformCount())
+						throw "Out of bounds xform index in selection distribution.";
+#endif
 					//printf("offset = %d, xform = %d, running sum = %f\n", j, i, tempDensity);
 					m_XformDistributions[(distrib * CHOOSE_XFORM_GRAIN) + j] = byte(i);
 					tempDensity += densityPerElement;
@@ -152,6 +158,11 @@ public:
 				}
 			}
 
+#ifdef _DEBUG
+			//Ensure every element of the distribution was populated.
+			if (j < CHOOSE_XFORM_GRAIN)
+				throw "Not all distribution elements set, undefined behavior.";
+#endif
 			//Flam3 did this, which gives the same result.
 			//T t = xforms[0].m_Weight;
 			//