private void AddRingSegment(MeshProxy proxy, Vector3 center, Vector3 normal, Vector3 startPointer,
float innerRadius, float outerRadius, float angle)
{
var subdivisions = (int)(angle / 8);
var angleStep = angle / subdivisions;
if (normal.y < 0)
{
center += (innerRadius + outerRadius) * startPointer;
startPointer *= -1;
}
for (int i = 0; i < subdivisions; i++)
{
if (normal.y > 0)
{
var firstPointer = Quaternion.AngleAxis(i * angleStep, normal) * startPointer;
var secondPointer = Quaternion.AngleAxis((i + 1) * angleStep, normal) * startPointer;
proxy.AddQuad(center + outerRadius * firstPointer, center + innerRadius * firstPointer,
center + outerRadius * secondPointer, center + innerRadius * secondPointer, Vector2.zero,
Vector2.right, Vector2.up, Vector2.one);
}
else
{
var firstPointer = Quaternion.AngleAxis(i * angleStep, normal) * startPointer;
var secondPointer = Quaternion.AngleAxis((i + 1) * angleStep, normal) * startPointer;
proxy.AddQuad(center + innerRadius * firstPointer, center + outerRadius * firstPointer,
center + innerRadius * secondPointer, center + outerRadius * secondPointer, Vector2.zero,
Vector2.right, Vector2.up, Vector2.one);
}
}
}
private void AddCircleSegment(MeshProxy proxy, Vector3 center, Vector3 startPointer, float angle, int subdivisions, bool ccw = false)
{
var angleStep = angle / subdivisions;
var axis = ccw ? Vector3.down : Vector3.up;
for (int i = 0; i < subdivisions; i++)
{
proxy.AddQuad(center, center + Quaternion.AngleAxis(i * angleStep, axis) * startPointer,
center,
center + Quaternion.AngleAxis((i + 1) * angleStep, axis) * startPointer, 0.5f * Vector2.right,
Vector2.right, new Vector2(0.5f, 1), Vector2.one);
}
}
private void AddCap(MeshProxy proxy, LineData line, Vector3 point, Vector3 direction, Vector3 t, bool endCap)
{
Vector3 end;
var capType = endCap ? line.EndCap : line.StartCap;
var capSize = endCap ? line.EndCapSize : line.StartCapSize;
switch (capType)
{
case LineCapType.None:
break;
case LineCapType.Sharp:
end = point + capSize * direction;
proxy.AddQuad(point - t, point, end, point,
Vector2.zero, 0.5f * Vector2.right, Vector2.up, new Vector2(0.5f, 1));
proxy.AddQuad(point, point + t, point, end,
0.5f * Vector2.right, Vector2.right, new Vector2(0.5f, 1), Vector2.one);
break;
case LineCapType.Arrow:
end = point + capSize * direction;
var center = point + 0.5f * capSize * direction;
var tNormalized = t.normalized;
proxy.AddQuad(point - t, point, point - capSize * tNormalized, center,
Vector2.zero, 0.5f * Vector2.right, Vector2.up, new Vector2(0.5f, 1));
proxy.AddQuad(point - capSize * tNormalized, center, end, center,
Vector2.zero, 0.5f * Vector2.right, Vector2.up, new Vector2(0.5f, 1));
proxy.AddQuad(center, end, center, point + capSize * tNormalized,
0.5f * Vector2.right, Vector2.right, new Vector2(0.5f, 1), Vector2.one);
proxy.AddQuad(point + t, point + capSize * tNormalized, point, center,
Vector2.right, Vector2.one, 0.5f * Vector2.right, new Vector2(0.5f, 1));
break;
case LineCapType.Round:
AddCircleSegment(proxy, point, t, 180, 10, true);
break;
default:
throw new ArgumentOutOfRangeException("type");
}
}
private void AddSegment(MeshProxy proxy, Vector3 p1, Vector3 p2, Vector3 t1,
Vector3?t2n = null)
{
var t2 = t2n ?? t1;
//Debug.DrawLine(p1 - t1, p1 - t1 + 0.1f * Vector3.up, Color.white, 12);
//yield return new WaitForSeconds(0.25f);
//Debug.DrawLine(p1 + t1, p1 + t1 + 0.1f * Vector3.up, Color.cyan, 11.75f);
//yield return new WaitForSeconds(0.25f);
//Debug.DrawLine(p2 - t2, p2 - t2 + 0.1f * Vector3.up, Color.black, 11.5f);
//yield return new WaitForSeconds(0.25f);
//Debug.DrawLine(p2 + t2, p2 + t2 + 0.1f * Vector3.up, Color.red, 11.25f);
//yield return new WaitForSeconds(0.25f);
proxy.AddQuad(
p1 - t1,
p1 + t1,
p2 - t2,
p2 + t2,
Vector2.zero,
Vector2.right,
Vector2.up,
Vector2.one);
}
private void RecalculateGeometry()
{
_renderer.sortingLayerName = SortingLayer;
var proxy = new MeshProxy(new Mesh());
foreach (var line in _lines)
{
var edges = new Vector3[line.Points.Length - 1];
for (var i = 0; i < line.Points.Length - 1; i++)
{
edges[i] = line.Points[i + 1] - line.Points[i];
}
for (var i = 1; i < line.Points.Length; i++)
{
if (i == line.Points.Length - 1)
{
var start = 0.5f * (proxy.vertices[proxy.vertices.Count - 1] + proxy.vertices[proxy.vertices.Count - 2]);
var t = Vector3.Cross(Vector3.up, edges[i - 1]).normalized *line.Width / 2;
AddSegment(proxy, start, line.Points[i], t);
AddCap(proxy, line, line.Points[i], edges[i - 1].normalized,
t, true);
}
else
{
ExpandCorner(proxy, line, line.Points[i], edges[i - 1], edges[i],
i == 1
? line.Points[0]
: 0.5f *
(proxy.vertices[proxy.vertices.Count - 2] +
proxy.vertices[proxy.vertices.Count - 1]), i == 1);
}
}
}
proxy.Commit(_filter);
}
private void ExpandCorner(MeshProxy proxy, LineData line, Vector3 point, Vector3 previousEdge, Vector3 nextEdge, Vector3 segmentStart, bool firstSegment)
{
var w = line.Width / 2;
var r = Mathf.Max(w, line.CornerRadius);
var angle = Vector3.Angle(previousEdge, nextEdge);
var sin = Mathf.Sin(Mathf.Deg2Rad * angle / 2);
var cos = Mathf.Cos(Mathf.Deg2Rad * angle / 2);
var hypothenuse = r / cos;
var slide = hypothenuse * sin;
//Debug.DrawLine(point, point + 0.25f*Vector3.up, Color.red, 2);
//yield return new WaitForSeconds(.05f);
//Debug.DrawLine(point, point - previousEdge, Color.blue, 2);
//Debug.DrawLine(point, point + nextEdge, Color.cyan, 2);
//yield return new WaitForSeconds(.1f);
var normalizedPrevious = previousEdge.normalized;
var normalizedNext = nextEdge.normalized;
var initial = point - slide * normalizedPrevious;
var initialRight = Vector3.Cross(Vector3.up, normalizedPrevious);
//Debug.DrawLine(initial, initial + 0.25f * Vector3.up, Color.yellow, 2);
//Debug.DrawLine(initial, initial + w * initialRight, Color.green, 2);
//yield return new WaitForSeconds(.05f);
// add connection between previous and current corner
AddSegment(proxy, segmentStart, initial, w * initialRight);
if (firstSegment)
{
AddCap(proxy, line, segmentStart, -normalizedPrevious, -w * initialRight, false);
}
switch (line.Corners)
{
case CornerStyle.Sharp:
var medianLength = hypothenuse * w / r;
var final = point + slide * normalizedNext;
var finalRight = Vector3.Cross(Vector3.up, normalizedNext);
var medianRight = (initialRight + finalRight).normalized;
//Debug.DrawLine(final, final + 0.25f * Vector3.up, Color.green, 2);
//Debug.DrawLine(final, final + w * finalRight, Color.yellow, 2);
//yield return new WaitForSeconds(.05f);
//Debug.DrawLine(point, point + 0.25f * Vector3.up, Color.black, 2);
//Debug.DrawLine(point, point + medianLength * medianRight, Color.blue, 2);
//yield return new WaitForSeconds(.1f);
AddSegment(proxy, initial, point, w * initialRight, medianLength * medianRight);
AddSegment(proxy, point, final, medianLength * medianRight, w * finalRight);
break;
case CornerStyle.Rounded:
var cornerAngle = angle;
var center = initial + r * initialRight;
var delta = r - w;
AddRingSegment(proxy, center, Vector3.Cross(normalizedPrevious, normalizedNext).normalized,
-initialRight, delta, delta + line.Width, cornerAngle);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
