Point Cloud

All the best for the New Year!
This is my new package for generating and rendering of Point Cloud.

Try web player



Coming soon.



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nice 1

 

Awesome !
It can be excellent for galaxies :

Code (CSharp):

1. PointF[] points;
2.  
3. public PointF[] GenerateGalaxy(int numOfStars, int numOfArms, float spin, double armSpread, double starsAtCenterRatio)
4. {
5.     List<PointF> result = new List<PointF>(numOfStars);
6.     for (int i = 0; i < numOfArms; i++)
7.     {
8.         result.AddRange(GenerateArm(numOfStars / numOfArms, (float)i / (float)numOfArms, spin, armSpread, starsAtCenterRatio));
9.     }
10.     return result.ToArray();
11. }
12.  
13. public PointF[] GenerateArm(int numOfStars, float rotation, float spin, double armSpread, double starsAtCenterRatio)
14. {
15.     PointF[] result = new PointF[numOfStars];
16.     Random r = new Random();
17.  
18.     for (int i = 0; i < numOfStars; i++)
19.     {
20.         double part = (double)i / (double)numOfStars;
21.         part = Math.Pow(part, starsAtCenterRatio);
22.  
23.         float distanceFromCenter = (float)part;
24.         double position = (part * spin + rotation) * Math.PI * 2;
25.  
26.         double xFluctuation = (Pow3Constrained(r.NextDouble()) - Pow3Constrained(r.NextDouble())) * armSpread;
27.         double yFluctuation = (Pow3Constrained(r.NextDouble()) - Pow3Constrained(r.NextDouble())) * armSpread;
28.  
29.         float resultX = (float)Math.Cos(position) * distanceFromCenter / 2 + 0.5f + (float)xFluctuation;
30.         float resultY = (float)Math.Sin(position) * distanceFromCenter / 2 + 0.5f + (float)yFluctuation;
31.  
32.         result[i] = new PointF(resultX, resultY);
33.     }
34.  
35.     return result;
36. }
37.  
38. public static double Pow3Constrained(double x)
39. {
40.     double value = Math.Pow(x - 0.5, 3) * 4 + 0.5d;
41.     return Math.Max(Math.Min(1, value), 0);
42. }
43.  
44. Example:
45.  
46. points = GenerateGalaxy(80000, 2, 3f, 0.1d, 3);

 

That was my immediate thought, I remember doing something similar years ago.

I'm looking forward to this Arkhivrag!

 

Is this project still alive?

 

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