public static void FillTriangleSimple(PaintTexture bitmap, Rectangle canvas, int x0, int y0, int x1, int y1, int x2, int y2, int color)
{
var c = (float)(color / 255f);
TexturePoint[] pixels = bitmap.GetPixels(canvas).ToArray();
int width = canvas.Width;
int height = canvas.Height;
// sort the points vertically
if (y1 > y2)
{
Swap(ref x1, ref x2);
Swap(ref y1, ref y2);
}
if (y0 > y1)
{
Swap(ref x0, ref x1);
Swap(ref y0, ref y1);
}
if (y1 > y2)
{
Swap(ref x1, ref x2);
Swap(ref y1, ref y2);
}
double dx_far = Convert.ToDouble(x2 - x0) / (y2 - y0 + 1);
double dx_upper = Convert.ToDouble(x1 - x0) / (y1 - y0 + 1);
double dx_low = Convert.ToDouble(x2 - x1) / (y2 - y1 + 1);
double xf = x0;
double xt = x0 + dx_upper; // if y0 == y1, special case
for (int y = y0; y <= (y2 > height - 1 ? height - 1 : y2); y++)
{
if (y >= 0)
{
for (int x = (xf > 0 ? Convert.ToInt32(xf) : 0); x <= (xt < width ? xt : width - 1); x++)
{
pixels[Convert.ToInt32(x + y * width)].Value = c;
}
for (int x = (xf < width ? Convert.ToInt32(xf) : width - 1); x >= (xt > 0 ? xt : 0); x--)
{
pixels[Convert.ToInt32(x + y * width)].Value = c;
}
}
xf += dx_far;
if (y < y1)
{
xt += dx_upper;
}
else
{
xt += dx_low;
}
}
}
private static void Paint(Voronoi graph, PaintTexture texture)
{
//Parallel.ForEach(graph.SitesIndexedByLocation, site =>
//{
foreach (var site in graph.SitesIndexedByLocation)
{
texture.PolygonFill(site.Value.OrderedColourPoints.Select(p => p.Position).ToList(),
site.Value.MapWeight);
}
//});
}
private static void GenerateTerrain(int numberOfPoints, PaintTexture texture, int seed)
{
var canvas = texture.Canvas;
var sw = new Stopwatch();
var sw2 = new Stopwatch();
sw2.Start();
sw.Start();
var points = GetRandomPoints(numberOfPoints, canvas, seed);
Debug.Log($"It took {sw.Elapsed} to Generate Points");
sw.Restart();
var graph = new Voronoi(points.ToList(),
new Rectf(canvas.StartPoint.x, canvas.StartPoint.y, canvas.EndPoint.x, canvas.EndPoint.y), 1);
Debug.Log($"It took {sw.Elapsed} to Generate the Graph");
sw.Restart();
SewBorder(graph);
Debug.Log($"It took {sw.Elapsed} to SewBorders");
sw.Restart();
GenerateTectonics(graph, 64, seed);
Debug.Log($"It took {sw.Elapsed} to Generate Tectonic Plates");
sw.Restart();
SmoothSites(graph, 2);
Debug.Log($"It took {sw.Elapsed} to Smooth sites");
sw.Restart();
GenerateTectonicShifts(graph, 2);
Debug.Log($"It took {sw.Elapsed} to Push the plates around");
sw.Restart();
graph.Plates.ForEach(p => p.EqualisePlateHeight(5));
Debug.Log($"It took {sw.Elapsed} to Equalise Plates");
sw.Restart();
SmoothSites(graph, 4);
Debug.Log($"It took {sw.Elapsed} to Smooth sites");
sw.Restart();
Paint(graph, texture);
Debug.Log($"It took {sw.Elapsed} to Paint");
Debug.Log($"It took {sw2.Elapsed} to Do everything\n\n");
}
/// <summary>
/// This is a very slow process that takes a Sphere_Template file and
/// processes a heightmap from the regions. Run this async so it doesn't
/// kill your framerate.
/// </summary>
/// <param name="material">The renderer material</param>
/// <param name="mainTexturePixels"></param>
/// <param name="height"></param>
/// <param name="width"></param>
/// <param name="seed"></param>
/// <returns></returns>
public static ThreadTexture GenerateHeightmap(Material material, Color[] mainTexturePixels, int height,
int width, int seed)
{
var texture = new ThreadTexture(mainTexturePixels, width, height);
var paintable = new PaintTexture(texture, seed);
const int NUMBER_OF_POINTS = 1024;
GenerateTerrain(NUMBER_OF_POINTS, paintable, seed);
paintable.Paint();
texture = paintable.Texture;
return(texture);
}