//the added bias-arguments are there to enable the calculation for daylight sinusvalue too
private float sinusValue(SinusSeason season, float lon, float timeFrom_0_To_12, float biasAdd, float biasDiv, float biasAmplitude)
{
//use values to swap sinus computation, becasue the sinus for spring and fall is a little different
int month, exp;
switch (season)
{
case SinusSeason.SPRING:
month = 3; //spring is approximatly 3 month before summer (ahead)
exp = 5; //should be odd N to get negative sinus values
break;
case SinusSeason.FALL:
month = -3; //fall/autumn is approximatly 3 month after summer (behind)
exp = 5; //should be odd N to get negative sinus values
break;
case SinusSeason.WINTER:
month = 0; //winter equals summer (negative values from function value, its okay)
exp = 3;//exp = 3; //1 is normal and should be okay... maybe we can use a 3 to dont interfere with spring&fall
break;
case SinusSeason.SUMMER:
default:
month = 0;
exp = 1;
break;
}
//move value of latitude from -180 - +180 to 0-12, becasue it should fit the months, not the longitude
lon += 180;
//lon = (lon / 360) * 12; //convert longitude to "month adopted from latitude" to change latitude to the actual season/month it should be, the "should month" can be further compared with actual month (not done within this function)
lon = (lon / 360) * 2 * biasDiv; //convert longitude to "month adopted from latitude" to change latitude to the actual season/month it should be, the "should month" can be further compared with actual month (not done within this function)
//the axis for "0" at starting month is not the 0-greenwitch meridian, so try to find a correction
//lon += _constSinusCorrection; //correct for 1 month ... amybe it should correct for longitude some lines before
lon += biasAdd; //correct for 1 month ... amybe it should correct for longitude some lines before
//return with +timefrom0to12 for actual influence and +month for spring or fall influence
//return _constSinusAmplitudeFactor * Math.Pow(Math.Cos((lon + timeFrom_0_To_12 + month) * Math.PI / 6f), exp);
//return _constSinusAmplitudeFactor * Mathf.Pow(Mathf.Cos((lon + timeFrom_0_To_12 + month) * Mathf.PI / 6f), exp);
//return sinusValueRaw((lon + timeFrom_0_To_12 + month + biasAdd) * Mathf.PI / biasDiv, _constSinusAmplitudeFactor, exp);
return sinusValueRaw((lon + timeFrom_0_To_12 + month) * Mathf.PI / biasDiv, biasAmplitude, exp);
}
private double distanceFactor(SinusSeason season, double dist, double distanceMax)
{
switch (season)
{
case SinusSeason.SPRING:
break;
case SinusSeason.FALL:
break;
case SinusSeason.WINTER:
distanceMax = -distanceMax;
break;
case SinusSeason.SUMMER:
default:
break;
}
//change this from liniar to maybe quadric? so the transition is more smooth
return Math.Floor(((dist + distanceMax) / (90f + 25f)) * 255f);
}
private float sinusValue(SinusSeason season, float lon, float timeFrom_0_To_12)
{
//returns for calculation of sinsvalue for months (like first intended)
return sinusValue(season, lon, timeFrom_0_To_12, _constSinusCorrection, 6f, _constSinusAmplitudeFactor);
}
