void CalculateTotalArea()
{
//get total area using trapezoids
//we'll get it as every 60th of a second, so find how many sections we want
//closer the sections are, the more accurate we'll have for our time
float sectionWidth = 1.0f / 60.0f;
float endTime = m_spawnRateCurve.GetLastKeyTime();
m_totalArea = m_spawnRateCurve.GetAreaUnderCurve(0, endTime, sectionWidth, m_timeSpan);
}
//gets the size of the area by splitting the curve into segments
public static float GetAreaUnderCurve(this AnimationCurve animCurve, float startPoint, float endPoint, float segmentSize, float timeScale)
{
int numSections = Mathf.CeilToInt((endPoint - startPoint) / segmentSize);
float section1 = startPoint;
float section2 = Mathf.Min(segmentSize, endPoint);
float area = 0;
while (section1 < section2)
{
area += animCurve.GetAreaUnderCurve(section1, section2);
section1 = section2;
section2 += segmentSize / timeScale;
section2 = Mathf.Clamp(section2, 0, endPoint);
}
return(area);
}