2 files changed, 37 insertions, 95 deletions

diff --git a/indra/llcommon/llcriticaldamp.cpp b/indra/llcommon/llcriticaldamp.cpp
index 27fef0e6dc..49aac9ce75 100644
--- a/indra/llcommon/llcriticaldamp.cpp
+++ b/indra/llcommon/llcriticaldamp.cpp
@@ -32,9 +32,8 @@
 // static members
 //-----------------------------------------------------------------------------
 LLFrameTimer LLCriticalDamp::sInternalTimer;
+std::map<F32, F32> LLCriticalDamp::sInterpolants;
 F32 LLCriticalDamp::sTimeDelta;
-F32	LLCriticalDamp::sInterpolants[kNumCachedInterpolants];
-F32 LLCriticalDamp::sInterpolatedValues[kNumCachedInterpolants];
 
 //-----------------------------------------------------------------------------
 // LLCriticalDamp()
@@ -42,17 +41,6 @@ F32 LLCriticalDamp::sInterpolatedValues[kNumCachedInterpolants];
 LLCriticalDamp::LLCriticalDamp()
 {
 	sTimeDelta = 0.f;
-
-	// Init the core interpolant values (to which many, many enums map)
-	//
-	setInterpolantConstant(InterpDelta_0_025, 0.025f);
-	setInterpolantConstant(InterpDelta_0_05,  0.05f );
-	setInterpolantConstant(InterpDelta_0_06,  0.06f);
-	setInterpolantConstant(InterpDelta_0_10,  0.10f);
-	setInterpolantConstant(InterpDelta_0_15,  0.15f);
-	setInterpolantConstant(InterpDelta_0_20,  0.20f);
-	setInterpolantConstant(InterpDelta_0_25,  0.25f);
-	setInterpolantConstant(InterpDelta_0_30,  0.30f);
 }
 
 // static
@@ -63,10 +51,40 @@ void LLCriticalDamp::updateInterpolants()
 {
 	sTimeDelta = sInternalTimer.getElapsedTimeAndResetF32();
 
-	U32 i;
-	for (i = 0; i < kNumCachedInterpolants; i++)
+	F32 time_constant;
+
+	for (std::map<F32, F32>::iterator iter = sInterpolants.begin();
+		 iter != sInterpolants.end(); iter++)
+	{
+		time_constant = iter->first;
+		F32 new_interpolant = 1.f - pow(2.f, -sTimeDelta / time_constant);
+		new_interpolant = llclamp(new_interpolant, 0.f, 1.f);
+		sInterpolants[time_constant] = new_interpolant;
+	}
+} 
+
+//-----------------------------------------------------------------------------
+// getInterpolant()
+//-----------------------------------------------------------------------------
+F32 LLCriticalDamp::getInterpolant(const F32 time_constant, BOOL use_cache)
+{
+	if (time_constant == 0.f)
+	{
+		return 1.f;
+	}
+
+	if (use_cache && sInterpolants.count(time_constant))
 	{
-		sInterpolatedValues[i] = llclamp(sTimeDelta / sInterpolants[ i], 0.0f, 1.0f);
+		return sInterpolants[time_constant];
 	}
+	
+	F32 interpolant = 1.f - pow(2.f, -sTimeDelta / time_constant);
+	interpolant = llclamp(interpolant, 0.f, 1.f);
+	if (use_cache)
+	{
+		sInterpolants[time_constant] = interpolant;
+	}
+
+	return interpolant;
 }
 
diff --git a/indra/llcommon/llcriticaldamp.h b/indra/llcommon/llcriticaldamp.h
index 19a2ddb77a..52f052ae25 100644
--- a/indra/llcommon/llcriticaldamp.h
+++ b/indra/llcommon/llcriticaldamp.h
@@ -32,98 +32,22 @@
 
 #include "llframetimer.h"
 
-// These enums each represent one fixed-time delta value
-// that we interpolate once given the actual sTimeDelta time
-// that has passed. This allows us to calculate the interp portion
-// of those values once and then look them up repeatedly per frame.
-//
-enum InterpDelta
-{	
-	InterpDelta_0_025,		// 0.025
-	InterpDeltaTeenier					= InterpDelta_0_025,
-	InterpDeltaFolderOpenTime			= InterpDelta_0_025,
-	InterpDeltaFolderCloseTime			= InterpDelta_0_025,
-	InterpDeltaCameraFocusHalfLife		= InterpDelta_0_025,	// USED TO BE ZERO....
-
-	InterpDelta_0_05,		// 0.05
-	InterpDeltaTeeny		= InterpDelta_0_05,
-
-	InterpDelta_0_06,		// 0.06
-	InterpDeltaObjectDampingConstant	= InterpDelta_0_06,	
-	InterpDeltaCameraZoomHalfLife		= InterpDelta_0_06,
-	InterpDeltaFovZoomHalfLife			= InterpDelta_0_06,
-	InterpDeltaManipulatorScaleHalfLife	= InterpDelta_0_06,
-	InterpDeltaContextFadeTime			= InterpDelta_0_06,
-
-	InterpDelta_0_10,		// 0.10
-	InterpDeltaSmaller					= InterpDelta_0_10,
-	InterpDeltaTargetLagHalfLife		= InterpDelta_0_10,
-	InterpDeltaSpeedAdjustTime			= InterpDelta_0_10,
-
-	InterpDelta_0_15,		// 0.15
-	InterpDeltaFadeWeight				= InterpDelta_0_15,
-	InterpDeltaHeadLookAtLagHalfLife	= InterpDelta_0_15,
-
-	InterpDelta_0_20,		// 0.20
-	InterpDeltaSmall					= InterpDelta_0_20,
-	InterpDeltaTorsoLagHalfLife			= InterpDelta_0_20,
-	InterpDeltaPositionDampingTC		= InterpDelta_0_20,
-
-	InterpDelta_0_25,		// 0.25
-	InterpDeltaCameraLagHalfLife		= InterpDelta_0_25,
-	InterpDeltaTorsoTargetLagHalfLife	= InterpDelta_0_25,
-	InterpDeltaTorsoLookAtLagHalfLife	= InterpDelta_0_25,
-
-	InterpDelta_0_30,		// 0.3
-	InterpDeltaSmallish		= InterpDelta_0_30,
-
-	// Dynamically set interpolants which use setInterpolantConstant
-	//
-	InterpDeltaCameraSmoothingHalfLife,	
-	InterpDeltaBehindnessLag,
-	InterpDeltaFocusLag,
-	InterpDeltaPositionLag,
-	InterpDeltaOpenTime,
-	InterpDeltaCloseTime,		
-
-	kNumCachedInterpolants
-};
-
 class LL_COMMON_API LLCriticalDamp 
 {
 public:
 	LLCriticalDamp();
 
-	// Updates all the known interp delta values for fast lookup in calls to getInterpolant(InterpDelta)
-	//
+	// MANIPULATORS
 	static void updateInterpolants();
 
-	static inline void setInterpolantConstant(InterpDelta whichDelta, const F32 time_constant)
-	{
-		llassert(whichDelta < kNumCachedInterpolants);
-		sInterpolants[whichDelta] = time_constant;
-	}
-
 	// ACCESSORS
-	static inline F32 getInterpolant(InterpDelta whichDelta)
-	{
-		llassert(whichDelta < kNumCachedInterpolants);
-		return sInterpolatedValues[whichDelta];
-	}
-
-	static inline F32 getInterpolant(const F32 time_constant)
-	{
-		return llclamp((sTimeDelta / time_constant), 0.0f, 1.0f);
-	}
+	static F32 getInterpolant(const F32 time_constant, BOOL use_cache = TRUE);
 
 protected:	
 	static LLFrameTimer sInternalTimer;	// frame timer for calculating deltas
 
-	//static std::map<F32, F32> 	sInterpolants;
-	static F32					sInterpolants[kNumCachedInterpolants];
-	static F32					sInterpolatedValues[kNumCachedInterpolants];
+	static std::map<F32, F32> 	sInterpolants;
 	static F32					sTimeDelta;
 };
 
 #endif  // LL_LLCRITICALDAMP_H
-