IEnumerable <Vector2> _genJointCircle(Vector2 p0, Vector2 p1, Vector2 p2)
{
List <Vector2> triangles = new List <Vector2>();
Vector2 line1 = (p1 - p0).normalized;
Vector2 line2 = (p2 - p1).normalized;
Vector2 n1 = new Vector2(-line1.y, line1.x).normalized;
Vector2 n2 = new Vector2(-line2.y, line2.x).normalized;
float scalar = Vector2.Dot(n1, n2);
Vector2 r;
if (Vector2.Dot(n1, line2) < 0)
{
r = n1 * _thickness;
}
else
{
r = -n2 * _thickness;
}
float angle = Mathf.Acos(scalar);
if (angle == 0f)
{
// No filling needed, lines are perfectly parallel
return(triangles);
}
triangles.AddRange(GraphicsProvider.GetCircleTriangles(p1, r, angle, Color.red, _circleDensity, -1f, _defaultZ));
return(triangles);
}
public void OnRenderObject()
{
UpdateThickness();
UpdateColor();
GraphicsProvider.DrawTriangles(transform, _color, _defaultZ, _triangleVertices);
if (_verticesAdded.Count > 0 && (_verticesAdded[0] != _verticesAdded[_verticesAdded.Count - 1] || _verticesAdded.Count == 1))
{
_drawCircles();
}
}
void _drawCircles()
{
if (_verticesAdded.Count == 0)
{
return;
}
if (_verticesAdded.Count < 2)
{
Vector2 p = _verticesAdded[0];
Vector2 v = new Vector2(0f, _thickness);
GraphicsProvider.DrawCircle(transform, p, v, 2 * Mathf.PI, _color, _circleDensity, 1f, _defaultZ);
}
else
{
Vector2 p0 = _verticesAdded[0];
Vector2 p1 = _verticesAdded[1];
Vector2 line = (p0 - p1).normalized;
Vector2 n = new Vector2(-line.y, line.x).normalized;
Vector2 p = p0;
Vector2 v = n * _thickness;
GraphicsProvider.DrawCircle(transform, p, v, Mathf.PI, _color, _circleDensity, -1f, _defaultZ);
p0 = _verticesAdded[_verticesAdded.Count - 1];
p1 = _verticesAdded[_verticesAdded.Count - 2];
line = (p0 - p1).normalized;
n = new Vector2(-line.y, line.x).normalized;
p = p0;
v = n * _thickness;
GraphicsProvider.DrawCircle(transform, p, v, Mathf.PI, _color, _circleDensity, -1f, _defaultZ);
}
}
