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#ifndef SHURIKENCURVES_H
#define SHURIKENCURVES_H
#include "ParticleSystemParticle.h"
#include "PolynomialCurve.h"
#include "Runtime/Math/AnimationCurve.h"
struct MinMaxCurve;
// Some profile numbers from a run with 250,000 particles evaluating 3 velocity properties each on Intel i7-2600 CPU @ 3.4 GHz
// Scalar: 4.6 ms
// Optimized curve: 7.2 ms
// Random between 2 scalars: 9.5 ms
// Random between 2 curves: 9.5 ms
// Non-optimized curve: 10.0 ms
// Random between 2 non-optimized curves: 12.0 ms
enum ParticleSystemCurveEvalMode
{
kEMScalar,
kEMOptimized,
kEMOptimizedMinMax,
kEMSlow,
};
enum MinMaxCurveState
{
kMMCScalar = 0,
kMMCCurve = 1,
kMMCTwoCurves = 2,
kMMCTwoConstants = 3
};
struct MinMaxOptimizedPolyCurves
{
void Integrate();
void DoubleIntegrate();
Vector2f FindMinMaxIntegrated();
Vector2f FindMinMaxDoubleIntegrated();
OptimizedPolynomialCurve max;
OptimizedPolynomialCurve min;
};
inline float EvaluateIntegrated (const MinMaxOptimizedPolyCurves& curves, float t, float factor)
{
const float v0 = curves.min.EvaluateIntegrated (t);
const float v1 = curves.max.EvaluateIntegrated (t);
return Lerp (v0, v1, factor);
}
inline float EvaluateDoubleIntegrated (const MinMaxOptimizedPolyCurves& curves, float t, float factor)
{
const float v0 = curves.min.EvaluateDoubleIntegrated (t);
const float v1 = curves.max.EvaluateDoubleIntegrated (t);
return Lerp (v0, v1, factor);
}
struct MinMaxPolyCurves
{
void Integrate();
void DoubleIntegrate();
Vector2f FindMinMaxIntegrated();
Vector2f FindMinMaxDoubleIntegrated();
PolynomialCurve max;
PolynomialCurve min;
};
inline float EvaluateIntegrated (const MinMaxPolyCurves& curves, float t, float factor)
{
const float v0 = curves.min.EvaluateIntegrated (t);
const float v1 = curves.max.EvaluateIntegrated (t);
return Lerp (v0, v1, factor);
}
inline float EvaluateDoubleIntegrated (const MinMaxPolyCurves& curves, float t, float factor)
{
const float v0 = curves.min.EvaluateDoubleIntegrated (t);
const float v1 = curves.max.EvaluateDoubleIntegrated (t);
return Lerp (v0, v1, factor);
}
struct MinMaxAnimationCurves
{
bool SupportsProcedural ();
AnimationCurve max;
AnimationCurve min;
};
bool BuildCurves (MinMaxOptimizedPolyCurves& polyCurves, const MinMaxAnimationCurves& editorCurves, float scalar, short minMaxState);
void BuildCurves (MinMaxPolyCurves& polyCurves, const MinMaxAnimationCurves& editorCurves, float scalar, short minMaxState);
bool CurvesSupportProcedural (const MinMaxAnimationCurves& editorCurves, short minMaxState);
struct MinMaxCurve
{
MinMaxOptimizedPolyCurves polyCurves;
private:
float scalar; // Since scalar is baked into the optimized curve we use the setter function to modify it.
public:
short minMaxState; // see enum MinMaxCurveState
bool isOptimizedCurve;
MinMaxAnimationCurves editorCurves;
MinMaxCurve ();
inline float GetScalar() const { return scalar; }
inline void SetScalar(float value) { scalar = value; BuildCurves(polyCurves, editorCurves, scalar, minMaxState); }
bool IsOptimized () const { return isOptimizedCurve; }
bool UsesMinMax () const { return (minMaxState == kMMCTwoCurves) || (minMaxState == kMMCTwoConstants); }
DEFINE_GET_TYPESTRING (MinMaxCurve)
template<class TransferFunction>
void Transfer (TransferFunction& transfer);
Vector2f FindMinMax() const;
Vector2f FindMinMaxIntegrated() const;
Vector2f FindMinMaxDoubleIntegrated() const;
};
inline float EvaluateSlow (const MinMaxCurve& curve, float t, float factor)
{
const float v = curve.editorCurves.max.Evaluate(t) * curve.GetScalar ();
if (curve.minMaxState == kMMCTwoCurves)
return Lerp (curve.editorCurves.min.Evaluate(t) * curve.GetScalar (), v, factor);
else
return v;
}
template<ParticleSystemCurveEvalMode mode>
inline float Evaluate (const MinMaxCurve& curve, float t, float factor = 1.0F)
{
if(mode == kEMScalar)
{
return curve.GetScalar();
}
if(mode == kEMOptimized)
{
DebugAssert(curve.isOptimizedCurve);
return curve.polyCurves.max.Evaluate (t);
}
else if (mode == kEMOptimizedMinMax)
{
DebugAssert(curve.isOptimizedCurve);
const float v0 = curve.polyCurves.min.Evaluate (t);
const float v1 = curve.polyCurves.max.Evaluate (t);
return Lerp (v0, v1, factor);
}
else if (mode == kEMSlow)
{
return EvaluateSlow (curve, t, factor);
}
}
inline float Evaluate (const MinMaxCurve& curve, float t, float randomValue = 1.0F)
{
if (curve.minMaxState == kMMCScalar)
return curve.GetScalar ();
if (curve.minMaxState == kMMCTwoConstants)
return Lerp ( curve.editorCurves.min.GetKey(0).value * curve.GetScalar (),
curve.editorCurves.max.GetKey(0).value * curve.GetScalar (), randomValue);
DebugAssert(t <= 1.0F && t >= 0.0F);
if (curve.isOptimizedCurve)
return Evaluate<kEMOptimizedMinMax> (curve, t, randomValue);
else
return Evaluate<kEMSlow> (curve, t, randomValue);
}
struct DualMinMax3DPolyCurves
{
MinMaxOptimizedPolyCurves optX;
MinMaxOptimizedPolyCurves optY;
MinMaxOptimizedPolyCurves optZ;
MinMaxPolyCurves x;
MinMaxPolyCurves y;
MinMaxPolyCurves z;
};
#endif // SHURIKENCURVES_H
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