public static List <Vector3> Split(Vector3 from, Vector3 to, Vector3 curve, int count)
{
List <Vector3> segments = new List <Vector3>();
segments.Add(from);
if (count <= 0)
{
return(segments);
}
var handler = Bezier.CalcHandler(from, to, curve);
for (int i = 1; i <= count; i++)
{
var t = (float)i / count;
segments.Add(Bezier.Square(from, to, handler, t));
}
return(segments);
}
void HandleOnUpdateCurve( )
{
var count = Mathf.Ceil(1 / curveDetail);
//Build the curve
var handler = Bezier.CalcHandler(startPosition, endPosition, curvePosition);;
//var handler = curvePosition;// //Bezier.Control(startPosition, endPosition, curvePosition);
var center = Bezier.Square(startPosition, endPosition, handler, 0.5F);
//centerPosition = new Vector3 ( center.x, center.y, 0 );
var vertices = new List <Vector3>();
var triangles = new List <int>();
var uv = new List <Vector2>();
var normals = new List <Vector3>();
var tangents = new List <Vector4>();
float UVX = 0F;
Vector2 I0, I1, I2, I3;
for (int i = 0; i < count; i++)
{
var pre = Bezier.Square(startPosition, endPosition, handler, (float)(i - 1) / count);
var cur = Bezier.Square(startPosition, endPosition, handler, (float)i / count);
var next = Bezier.Square(startPosition, endPosition, handler, (float)(i + 1) / count);
var preTegent = cur - pre;
var nextTegent = next - cur;
var normal = Vector3.back;
var preBinormal = Vector3.zero;
var nextBinormal = Vector3.zero;
Vector3.OrthoNormalize(ref normal, ref preTegent, ref preBinormal);
Vector3.OrthoNormalize(ref normal, ref nextTegent, ref nextBinormal);
var preOffset = width * 0.5F * preBinormal;
var nextOffset = width * 0.5F * nextBinormal;
var p0 = pre + preOffset; // (Vector2)(pre + preOffset);
var p1 = cur + preOffset; // (Vector2) (cur + preOffset);
var p2 = cur + nextOffset; // (Vector2) (cur + nextOffset);
var p3 = next + nextOffset; // (Vector2) (next + nextOffset);
var p4 = pre - preOffset; // (Vector2) (pre - preOffset);
var p5 = cur - preOffset; // (Vector2) (cur - preOffset);
var p6 = cur - nextOffset; // (Vector2) (cur - nextOffset);
var p7 = next - nextOffset; // (Vector2) (next - nextOffset);
var preLength = Vector3.Distance(cur, pre);
var nextLength = Vector3.Distance(next, cur);
int size = vertices.Count;
if (size != 0 && CGAlgorithm.Intersect2D_2Segments(p0, p1, p2, p3, out I0, out I1) > 0)
{
int interIndex = size - 2;
vertices [interIndex] = I0;
vertices.AddRange(new Vector3 [] { p6, I0, p3, p7 });
triangles.AddRange(new int [] { size, size + 2, size + 1, size, size + 3, size + 2, size - 1, size, interIndex });
}
else if (size != 0 && CGAlgorithm.Intersect2D_2Segments(p4, p5, p6, p7, out I2, out I3) > 0)
{
int interIndex = size - 1;
vertices [interIndex] = I2;
vertices.AddRange(new Vector3 [] { I2, p2, p3, p7 });
triangles.AddRange(new int [] { size, size + 2, size + 1, size, size + 3, size + 2, interIndex, size + 1, size - 2 });
}
else
{
vertices.AddRange(new Vector3 [] { p6, p2, p3, p7 });
triangles.AddRange(new int [] { size, size + 2, size + 1, size, size + 3, size + 2 });
}
var preUVX = UVX;
UVX += nextLength / width;
uv.AddRange(new Vector2 [] { new Vector2(preUVX, 0), new Vector2(preUVX, 1), new Vector2(UVX, 1), new Vector2(UVX, 0) });
normals.AddRange(new Vector3 [] { Vector3.back, Vector3.back, Vector3.back, Vector3.back });
tangents.AddRange(new Vector4 [] { new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1) });
}
Vertices = vertices.ToArray( );
Triangles = triangles.ToArray( );
UV = uv.ToArray( );
Normals = normals.ToArray( );
Tangents = tangents.ToArray( );
}
