void BuildStructures()
{
// Loop through each pixel of the structures map
// if we find pixels that aren't transparent (or whatever our criteria is)
// then we will spawn a structure based on the color code.
// IDEALLY -- We don't want to have to parse the building map for every chunk.
// It would be nice instead if we did this once and just cached where all the
// buildings should be. -- This is very easy.
Color32[] pixels = StructureMapTexture.GetPixels32();
Color32 c32 = new Color32(255, 0, 0, 255);
// Holy crap, it turns out that these .width and .height calls are SUUUUUUUUUPER expensive.
// I cut my ENTIRE terrain-generation time in half by caching these.
// -- quill18
int w = StructureMapTexture.width;
int h = StructureMapTexture.height;
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
Color32 p = pixels[x + y * w];
if (p.a < 128)
{
// transparent pixel, ignore.
continue;
}
//Debug.Log("Not transparent!: " + p.ToString());
foreach (StructureColor sc in StructureColors)
{
if (sc.Color.r == p.r && sc.Color.g == p.g && sc.Color.b == p.b)
{
//Debug.Log("Color match!");
// What is the position of the building?
SphericalCoord buildingLatLon = CoordHelper.UVToSpherical(new Vector2((float)x / w, (float)(y) / h));
Vector3 localPosition = SphericalToLocalPosition(buildingLatLon);
if (localPosition.x < 0 || localPosition.x > WorldUnitsPerChunk || localPosition.z < 0 || localPosition.z > WorldUnitsPerChunk)
{
// Not in our chunk!
continue;
}
// Spawn the correct building.
Vector3 globalPosition = localPosition + this.transform.position;
// Fix the building's height
float heightAtGlobalPosition = terrain.SampleHeight(globalPosition);
globalPosition.y = heightAtGlobalPosition;
// Our rotation is going to be a factor of our longitude and the Z rotation of this chunk
// FIXME: Test me -- especially near the poles and with different chunk rotations
Quaternion rot = Quaternion.Euler(0, ChunkRotation.eulerAngles.z + Mathf.Sin(Mathf.Deg2Rad * buildingLatLon.Latitude) * buildingLatLon.Longitude, 0);
GameObject theStructure = (GameObject)Instantiate(sc.StructurePrefab, globalPosition, rot, this.transform);
SmoothTerrainUnderStructure(theStructure);
// Stop looping through structure colors
break; // foreach
}
}
}
}
}