public float GetTerrainHeight(float x, float y, Island island)
{
//simple height generation (only one noise pass)
PerIslandGeneratorProperties properties = (PerIslandGeneratorProperties)island.GeneratorProperties;
float height = IslandNoise.GetPerlin(x * TerrainNoiseScale, y * TerrainNoiseScale) + properties.noiseOffset;
height *= TerrainAmp;
//circular, square masks (to achieve island looking terrain)
float distance_x = Mathf.Abs(x - island.Size * 0.5f);
float distance_y = Mathf.Abs(y - island.Size * 0.5f);
float distance = 0f;
if (properties.circleShaped)
{
distance = Mathf.Sqrt(distance_x * distance_x + distance_y * distance_y); // circular mask
}
else
{
distance = Mathf.Max(distance_x, distance_y); // square mask
}
float max_width = island.Size * 0.5f - 10.0f;
float delta = distance / max_width;
float gradient = delta * delta;
height *= Mathf.Max(0.0f, 1.0f - gradient);
return(height);
}
public void SetupIslandForGeneration(Island island)
{
//always use random with static unique per island seed so engine will generate always same island in given position
random = new Random(GetPerIslandSeed(island));
//height generation properties
PerIslandGeneratorProperties properties = new PerIslandGeneratorProperties();
island.GeneratorProperties = properties;
properties.islandSize = (int)random.Range(300, 1000);
properties.noiseOffset = random.Range(.4f, 1f);
properties.circleShaped = random.Bool();
//mesh generation properties
island.Size = properties.islandSize;
island.minPointRadius = 6;
island.trianglesInChunk = 1500;
}
