void drawTracks(BallTrackData activeBallData)
{
List <VertexPositionColor> vertices = new List <VertexPositionColor>();
var baseTime = activeBallData.Frames.First().Time;
var end = DateTime.Now.AddSeconds(1);
for (DateTime t = baseTime; t < end; t = t.AddSeconds(0.01f))
{
var pos = realToScreen3d(activeBallData.ProjFit.PredictPos(t).ToV3());
vertices.Add(new VertexPositionColor(pos, Color.Red));
}
var varr = vertices.ToArray();
var indices = Enumerable.Range(0, varr.Length).ToArray();
lineEffect.World = Matrix.Identity;
lineEffect.View = camera.View;
lineEffect.Projection = camera.Projection;
lineEffect.VertexColorEnabled = true;
foreach (EffectPass pass in lineEffect.CurrentTechnique.Passes)
{
pass.Apply();
GraphicsDevice.DrawUserIndexedPrimitives <VertexPositionColor>(PrimitiveType.LineStrip, varr, 0, varr.Length, indices, 0, varr.Length - 1);
}
}
void drawTracksFancy(BallTrackData activeBallData)
{
List <VertexPositionColor>[] vertices = new List <VertexPositionColor> [5];
for (int i = 0; i < vertices.Length; i++)
{
vertices[i] = new List <VertexPositionColor>();
}
int numTrails = vertices.Length - 1;
var rad = activeBallData.Frames.Last().Ball.Radius;
var baseTime = activeBallData.Frames.First().Time;
var end = DateTime.Now.AddSeconds(0.5);
for (DateTime t = baseTime; t < end; t = t.AddSeconds(0.01f))
{
var pos = realToScreen3d(activeBallData.ProjFit.PredictPos(t).ToV3());
var posNext = realToScreen3d(activeBallData.ProjFit.PredictPos(t.AddSeconds(0.01f)).ToV3());
Color c;
if (t < DateTime.Now)
{
c = Color.LimeGreen;
}
else
{
c = Color.Red;
}
for (int i = 0; i < numTrails; i++)
{
var dir = Vector3.Normalize(posNext - pos);
var u = Vector3.Normalize(Vector3.Cross(dir, Vector3.UnitY));
var v = Vector3.Normalize(Vector3.Cross(u, dir));
var theta = (2 * Math.PI / numTrails * i);
var disp = (float)Math.Sin(theta) * u + (float)Math.Cos(theta) * v;
var posMod = pos + disp * rad;
vertices[i].Add(new VertexPositionColor(posMod, c));
}
vertices[vertices.Length - 1].Add(new VertexPositionColor(pos, Color.Red));
}
var indices = Enumerable.Range(0, vertices[0].Count()).ToArray();
lineEffect.World = Matrix.Identity;
lineEffect.View = camera.View;
lineEffect.Projection = camera.Projection;
lineEffect.VertexColorEnabled = true;
foreach (EffectPass pass in lineEffect.CurrentTechnique.Passes)
{
pass.Apply();
foreach (var verts in vertices)
{
var varr = verts.ToArray();
GraphicsDevice.DrawUserIndexedPrimitives <VertexPositionColor>(PrimitiveType.LineStrip, varr, 0, varr.Length, indices, 0, varr.Length - 1);
}
}
}
