public void Validate()
{
if (TREECOUNT < 0) TREECOUNT = 0;
if (HEIGHT < 1) HEIGHT = 1;
if (HEIGHTVARIATION > HEIGHT) HEIGHTVARIATION = HEIGHT;
if (TRUNKTHICKNESS < 0) TRUNKTHICKNESS = 0;
if (TRUNKHEIGHT < 0) TRUNKHEIGHT = 0;
if (FOLIAGEDENSITY < 0) FOLIAGEDENSITY = 0;
if (BRANCHDENSITY < 0) BRANCHDENSITY = 0;
}