public IEnumerable <IMesh> Draw()
{
if (_line.Line.option.endRatio - _line.Line.option.startRatio <= 0)
{
yield break;
}
//todo : merge Pairlist with TripleList to one iteration.
var ff = true;
Spline.LinePair last = new Spline.LinePair();
foreach (var pair in _line.Line.TargetPairList)
{
if (ff)
{
ff = false;
if (_line.Line.option.mode == LineOption.Mode.RoundEdge)// && pairList.Count() > 0)
{
foreach (var mesh in _capDrawer.Build(pair, false))
{
yield return(mesh);
}
}
}
foreach (var mesh in _bezierDrawer.Build(pair))
{
yield return(mesh);
}
last = pair;
}
foreach (var triple in _line.Line.TripleList)
{
var joint = _line.Line.option.jointOption == LineOption.LineJointOption.round ? _jointDrawer : _jointIntersectDrawer;
foreach (var mesh in joint.Build(triple))
{
yield return(mesh);
}
}
if (_line.Line.option.mode == LineOption.Mode.RoundEdge)
{
foreach (var mesh in _capDrawer.Build(last, true))
{
yield return(mesh);
}
}
}
public IEnumerable <IMesh> Build(Spline.LinePair pair)
{
var LineData = _line.Line;//hard copy.
float dt = pair.GetDT(LineData.option.DivideLength);
Vector3 prv1 = Vector3.zero;
Vector3 prv2 = Vector3.zero;
/// todo : too complicate need split code for test or something.
for (float t = pair.start; t < pair.end; t += dt)
{
var ws = Mathf.Lerp(pair.n0.width, pair.n1.width, t);
var we = Mathf.Lerp(pair.n0.width, pair.n1.width, t + dt);
var ps = Curve.Auto(pair.n0, pair.n1, t);
var pe = Curve.Auto(pair.n0, pair.n1, Mathf.Min(pair.end, t + dt));
var cs = LineData.option.color.Evaluate(pair.sRatio + t * pair.RatioLength);
var ce = LineData.option.color.Evaluate(pair.sRatio + (t + dt) * pair.RatioLength);
var d = pe - ps;
var wd = Vector3.Cross(d, Vector3.back).normalized;
var wds = t == 0f ? Vector3.Cross(Curve.AutoDirection(pair.n0, pair.n1, 0), Vector3.back).normalized : wd;
var wde = Vector3.Cross(pair.GetDirection(1f), Vector3.back).normalized;
var uv = new Vector2[] { new Vector2(0, 1), new Vector2(1, 1), Vector2.zero, new Vector2(1, 0) };
if (_line is Image && ((Image)_line).sprite != null)
{
uv = ((Image)_line).sprite.uv;
}
var p0 = Vertex.New(t == pair.start ? ps + wds * ws : prv1, uv[0], cs);
var p1 = Vertex.New(t == pair.start ? ps - wds * ws : prv2, uv[1], cs);
var end = Mathf.Abs(t - pair.end) < dt;
var p2 = Vertex.New(end ? pe + wde * we : pe + wd * we, uv[2], ce);
var p3 = Vertex.New(end ? pe - wde * we : pe - wd * we, uv[3], ce);
prv1 = pe + wd * we;
prv2 = pe - wd * we;
yield return(new Quad(p0, p1, p2, p3));
}
}
public IEnumerable <IMesh> Build(Spline.LinePair pair, bool isEnd)
{
var normal = Vector3.back;
var Line = _line.Line; // hardCopy.
var divideAngle = Line.option.DivideAngle;
var t = isEnd ? 1f : 0f;
var color = Line.option.color.Evaluate(isEnd ? Line.option.endRatio : Line.option.startRatio);
var position = pair.GetPoisition(t);
var radian = pair.GetWidth(t);
var direction = pair.GetDirection(isEnd ? 1 : 0) * (isEnd?-1:1);
var wv = Vector3.Cross(direction, normal).normalized *radian;
var dc = Mathf.Max(1, Mathf.Floor(180f / divideAngle));
var da = 180f / dc;
var rot = Quaternion.Euler(-normal * da);
var uv = new Vector2[] { new Vector2(0, 1), new Vector2(1, 1), Vector2.zero, new Vector2(1, 0) };
if (_line is Image && ((Image)_line).sprite != null)
{
uv = ((Image)_line).sprite.uv;
}
var center = (uv[0] + uv[1] + uv[2] + uv[3]) / 4f;
for (float a = 0f; a < 179f; a += da)
{
var v0 = Vertex.New(position, center, color);
var v1 = Vertex.New(position + wv, (!isEnd ? a > 90 : a < 90) ? uv[1]:uv[0], color);
var v2 = Vertex.New(position + rot * wv, (!isEnd ? a > 90 : a < 90) ? uv[3]:uv[2], color);
yield return(new Triangle(v0, v1, v2));
wv = rot * wv;
}
}