/// <summary>
/// Get position evaluated at testLerpValue.
/// </summary>
/// <param name="testLerpValue"></param>
/// <returns></returns>
public Vector3 getPosition(float testLerpValue)
{
Vector3 position = Vector3.zero;
//if length isnt 0 and endpoints isnt null
if (curves.Count > 0)
{
testLerpValue = Mathf.Clamp(testLerpValue, 0, 0.999f);
//determine total allocated lerp time
float totalTimeBlockSize = 0;
for (int i = 0; i < CurvesCount; i++)
{
totalTimeBlockSize += 1 / curves[i].speedCurveAverage;
}
float timeBlockStartValue = 0;
int offset;
float lerpValue = 0;
for (offset = 0; offset < CurvesCount; offset++)
{
timeBlockStartValue += (1f / curves[offset].speedCurveAverage);
//if is correct animation curve to determine area for
if ((testLerpValue * totalTimeBlockSize) <= timeBlockStartValue)
{
float lerp = ((testLerpValue * totalTimeBlockSize) - (timeBlockStartValue - (1f / curves[offset].speedCurveAverage))) / (1f / curves[offset].speedCurveAverage);
lerpValue = BezierCurveUtilities.calculateCubicBezierArea(0, lerp, curves[offset].speedCurvePoints) / curves[offset].totalCurveArea;//determine percentage of area under curve on the left of lerp value in animation curve
break;
}
}
if (offset < curves.Count)
{
float subtractedLerpVal = 1 - lerpValue;
//cubic polynomial. (1-lerpVal)^3 * P0 + 3(1-lerpVal)^2 * lerpVal * P1 + 3(1-lerpVal) * lerpVal^2 * P2 + lerpVal^3 * P3
position = (subtractedLerpVal * subtractedLerpVal * subtractedLerpVal * curves[offset].endPoints[0]) +
(3 * subtractedLerpVal * subtractedLerpVal * lerpValue * curves[offset].controlPoints[0]) +
(3 * subtractedLerpVal * lerpValue * lerpValue * curves[offset].controlPoints[1]) +
(lerpValue * lerpValue * lerpValue * curves[offset].endPoints[1]);
}
}
return(position);
}
public bool setAnimationCurve(int ofCurve, AnimationCurve curve)
{
if (isWithinArrayCheck(ofCurve))
{
totalArea -= curves[ofCurve].speedCurveAverage;
curves[ofCurve].speedCurve = curve;
BezierCurveUtilities.CubicBezier2D bezier = BezierCurveUtilities.getAnimationCurvePositions(curves[ofCurve].speedCurve);
curves[ofCurve].speedCurvePoints = bezier;
float area = BezierCurveUtilities.calculateCubicBezierArea(0, 1, bezier.position1.y, bezier.position2.y, bezier.position3.y, bezier.position4.y);
float testArea = BezierCurveUtilities.calculateCubicBezierArea(0, 0.5f, bezier.position1.y, bezier.position2.y, bezier.position3.y, bezier.position4.y);
curves[ofCurve].totalCurveArea = area;
totalArea += (area);
return(true);
}
return(false);
}