142 lines
2.8 KiB
Ucode
142 lines
2.8 KiB
Ucode
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/**
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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class CurveEdPreset_LinearDecay extends CurveEdPresetBase
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native
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editinlinenew
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hidecategories(Object);
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var() float StartDecay;
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var() float StartValue;
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var() float EndDecay;
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var() float EndValue;
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/** Virtual function to get the user-readable name for the curve */
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function string GetDisplayName()
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{
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local string RetVal;
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RetVal = "LinearDecay";
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return RetVal;
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}
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/** Virtual function to verify the settings are valid */
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function bool AreSettingsValid(bool bIsSaving)
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{
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if (StartDecay >= EndDecay)
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{
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return false;
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}
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return true;
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}
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/** Virtual function to get the required KeyIn times*/
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function bool GetRequiredKeyInTimes(out array<float> RequiredKeyInTimes)
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{
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local bool bRetval;
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local int GenerateCount;
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local int PointCount;
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bRetval = true;
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GenerateCount = 2;
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if (StartDecay > 0.0)
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{
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GenerateCount += 1;
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}
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if (EndDecay < 1.0)
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{
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GenerateCount += 1;
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}
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RequiredKeyInTimes.Insert(0, GenerateCount);
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RequiredKeyInTimes[PointCount] = 0.0;
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PointCount++;
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if (StartDecay != 0.0)
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{
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RequiredKeyInTimes[PointCount] = StartDecay;
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PointCount++;
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}
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RequiredKeyInTimes[PointCount] = EndDecay;
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PointCount++;
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if (EndDecay < 1.0)
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{
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RequiredKeyInTimes[PointCount] = 1.0;
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PointCount++;
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}
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return bRetval;
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}
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/** Virtual function to generate curve */
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function bool GenerateCurve(out array<float> RequiredKeyInTimes, out array<PresetGeneratedPoint> GeneratedPoints)
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{
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local bool bRetval;
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local int GenerateCount;
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local int PointCount;
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local float CurrentKeyIn;
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local float Difference;
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local float Alpha;
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bRetval = true;
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GenerateCount = RequiredKeyInTimes.Length;
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GeneratedPoints.Insert(0, GenerateCount);
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Difference = EndDecay - StartDecay;
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/***
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`Log("Generated Data for " $ GetDisplayName());
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***/
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for (PointCount = 0; PointCount < RequiredKeyInTimes.Length; PointCount++)
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{
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CurrentKeyIn = RequiredKeyInTimes[PointCount];
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GeneratedPoints[PointCount].KeyIn = CurrentKeyIn;
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GeneratedPoints[PointCount].TangentsValid = false;
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GeneratedPoints[PointCount].IntepMode = CIM_CurveAuto;
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if (CurrentKeyIn < StartDecay)
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{
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GeneratedPoints[PointCount].KeyOut = StartValue;
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}
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else
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if (CurrentKeyIn > EndDecay)
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{
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GeneratedPoints[PointCount].KeyOut = EndValue;
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}
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else
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{
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Alpha = (CurrentKeyIn - StartDecay) / Difference;
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GeneratedPoints[PointCount].KeyOut = Lerp(StartValue, EndValue, Alpha);
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}
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/***
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`Log(" Key " $ PointCount $ " - " $ CurrentKeyIn $ " - " $ GeneratedPoints[PointCount].KeyOut);
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***/
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}
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return bRetval;
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}
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/** */
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cpptext
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{
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}
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/** */
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defaultproperties
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{
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StartDecay=0.0
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StartValue=1.0
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EndDecay=1.0
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EndValue=0.0
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}
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