// create the base heightmap
void Raise()
{
Random raiseRand = new Random(random.Next());
FilteredNoise raiseNoise1 = new FilteredNoise(new PerlinNoise(raiseRand, genParams.TerrainDetailOctaves),
new PerlinNoise(raiseRand, genParams.TerrainDetailOctaves));
FilteredNoise raiseNoise2 = new FilteredNoise(new PerlinNoise(raiseRand, genParams.TerrainDetailOctaves),
new PerlinNoise(raiseRand, genParams.TerrainDetailOctaves));
PerlinNoise raiseNoise3 = new PerlinNoise(raiseRand, genParams.TerrainFeatureOctaves);
const double scale = 1.3;
for (int x = 0; x < genParams.MapWidth; x++)
{
for (int y = 0; y < genParams.MapLength; y++)
{
double d2 = raiseNoise1.GetNoise(x * scale, y * scale) / 6 - 4;
double d3 = raiseNoise2.GetNoise(x * scale, y * scale) / 5 + 10 - 4;
double d4 = raiseNoise3.GetNoise(x, y) / 8;
if (d4 > 0)
{
d3 = d2;
}
double elevation = Math.Max(d2, d3) / 2;
if (elevation < 0)
{
elevation *= 0.8;
}
heightmap[(x + y * genParams.MapWidth)] = (int)elevation;
}
}
}
// apply erosion effect on the heightmap
void Erode()
{
Random erodeRand = new Random(random.Next());
FilteredNoise erodeNoise1 = new FilteredNoise(new PerlinNoise(erodeRand, genParams.TerrainDetailOctaves),
new PerlinNoise(erodeRand, genParams.TerrainDetailOctaves));
FilteredNoise erodeNoise2 = new FilteredNoise(new PerlinNoise(erodeRand, genParams.TerrainDetailOctaves),
new PerlinNoise(erodeRand, genParams.TerrainDetailOctaves));
for (int x = 0; x < genParams.MapWidth; x++)
{
for (int y = 0; y < genParams.MapLength; y++)
{
double d1 = erodeNoise1.GetNoise(x * 2, y * 2) / 8;
int i7 = erodeNoise2.GetNoise(x * 2, y * 2) > 0 ? 1 : 0;
if (d1 <= 2)
{
continue;
}
int i19 = ((heightmap[(x + y * genParams.MapWidth)] - i7) / 2 * 2) + i7;
heightmap[(x + y * genParams.MapWidth)] = i19;
}
}
}
// apply erosion effect on the heightmap
void Erode() {
Random erodeRand = new Random( random.Next() );
FilteredNoise erodeNoise1 = new FilteredNoise( new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ),
new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ) );
FilteredNoise erodeNoise2 = new FilteredNoise( new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ),
new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ) );
for( int x = 0; x < genParams.MapWidth; x++ ) {
for( int y = 0; y < genParams.MapLength; y++ ) {
double d1 = erodeNoise1.GetNoise( x*2, y*2 )/8;
int i7 = erodeNoise2.GetNoise( x*2, y*2 ) > 0 ? 1 : 0;
if( d1 <= 2 ) continue;
int i19 = ((heightmap[(x + y*genParams.MapWidth)] - i7)/2*2) + i7;
heightmap[(x + y*genParams.MapWidth)] = i19;
}
}
}
// create the base heightmap
void Raise() {
Random raiseRand = new Random( random.Next() );
FilteredNoise raiseNoise1 = new FilteredNoise( new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ),
new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ) );
FilteredNoise raiseNoise2 = new FilteredNoise( new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ),
new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ) );
PerlinNoise raiseNoise3 = new PerlinNoise( raiseRand, genParams.TerrainFeatureOctaves );
const double scale = 1.3;
for( int x = 0; x < genParams.MapWidth; x++ ) {
for( int y = 0; y < genParams.MapLength; y++ ) {
double d2 = raiseNoise1.GetNoise( x*scale, y*scale )/6 - 4;
double d3 = raiseNoise2.GetNoise( x*scale, y*scale )/5 + 10 - 4;
double d4 = raiseNoise3.GetNoise( x, y )/8;
if( d4 > 0 ) d3 = d2;
double elevation = Math.Max( d2, d3 )/2;
if( elevation < 0 ) elevation *= 0.8;
heightmap[(x + y*genParams.MapWidth)] = (int)elevation;
}
}
}