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-rwxr-xr-xindra/llcommon/llcriticaldamp.h32
1 files changed, 26 insertions, 6 deletions
diff --git a/indra/llcommon/llcriticaldamp.h b/indra/llcommon/llcriticaldamp.h
index 52f052ae25..ab5d4ba6e2 100755
--- a/indra/llcommon/llcriticaldamp.h
+++ b/indra/llcommon/llcriticaldamp.h
@@ -28,26 +28,46 @@
#ifndef LL_LLCRITICALDAMP_H
#define LL_LLCRITICALDAMP_H
-#include <map>
+#include <vector>
#include "llframetimer.h"
+#include "llunit.h"
-class LL_COMMON_API LLCriticalDamp
+class LL_COMMON_API LLSmoothInterpolation
{
public:
- LLCriticalDamp();
+ LLSmoothInterpolation();
// MANIPULATORS
static void updateInterpolants();
// ACCESSORS
- static F32 getInterpolant(const F32 time_constant, BOOL use_cache = TRUE);
+ static F32 getInterpolant(LLUnit<LLUnits::Seconds, F32> time_constant, bool use_cache = true);
-protected:
+ template<typename T>
+ static T lerp(T a, T b, LLUnit<LLUnits::Seconds, F32> time_constant, bool use_cache = true)
+ {
+ F32 interpolant = getInterpolant(time_constant, use_cache);
+ return ((a * (1.f - interpolant))
+ + (b * interpolant));
+ }
+
+protected:
+ static F32 calcInterpolant(F32 time_constant);
+
+ struct CompareTimeConstants;
static LLFrameTimer sInternalTimer; // frame timer for calculating deltas
- static std::map<F32, F32> sInterpolants;
+ struct Interpolant
+ {
+ F32 mTimeScale;
+ F32 mInterpolant;
+ };
+ typedef std::vector<Interpolant> interpolant_vec_t;
+ static interpolant_vec_t sInterpolants;
static F32 sTimeDelta;
};
+typedef LLSmoothInterpolation LLCriticalDamp;
+
#endif // LL_LLCRITICALDAMP_H