/// <summary>
/// A mask to make temperature look right.
/// </summary>
/// <param name="mapValue">The input value.</param>
/// <param name="y">The Y Coord of this value.</param>
/// <param name="maxY">The height of the world.</param>
/// <returns>The elevation to use.</returns>
private static float TempertureMask(float mapValue, int y, int maxY)
{
const int MinTemp = 0;
const int MaxTemp = 80;
float initialValue = (mapValue / 255f * 40f) - 20f;
float position = (float)y / (float)maxY * 2;
float positionInverse = (1.0f - ((float)y / (float)maxY)) * 2;
float baseValue = position <= 1.0f ? Masks.Lerp(MinTemp, MaxTemp, position) : Masks.Lerp(MinTemp, MaxTemp, positionInverse);
return(baseValue + initialValue);
}
/// <summary>
/// A mask to make elevation look right.
/// </summary>
/// <param name="initalValue">The input value.</param>
/// <param name="x">The X coord of this value.</param>
/// <param name="y">The Y coord of this value.</param>
/// <param name="maxX">The width of the world.</param>
/// <param name="maxY">The height of the world.</param>
/// <returns>The elevation to use.</returns>
private static float ElevationMask(float initalValue, int x, int y, int maxX, int maxY)
{
const float ColdFadeStart = 0.20f;
return
(Masks.FadeToZeroAtEnds(
ColdFadeStart,
y,
maxY,
Masks.FadeToZeroAtEnds(
ColdFadeStart,
x,
maxX,
initalValue)));
}