private static void BuildTestColumnWithProperties(float x, float width, PathEnding ending, PathCorner corners, VectorUtils.TessellationOptions options)
{
var sprites = new List <Sprite>();
var angles = new float[] {
-Mathf.PI + Mathf.PI / 8,
-Mathf.PI + Mathf.PI / 4,
Mathf.PI - Mathf.PI / 4,
Mathf.PI - Mathf.PI / 8
};
foreach (var angle in angles)
{
var path = LinesWithAngle(angle, width);
var pathProps = path.PathProps;
pathProps.Head = ending;
pathProps.Tail = ending;
pathProps.Corners = corners;
path.PathProps = pathProps;
var geoms = new List <VectorUtils.Geometry>();
TessellatePath(path.Contours[0], path.PathProps, geoms, options);
sprites.Add(SpriteFromGeometry(geoms));
}
var pos = new Vector2(x, 0.0f);
foreach (var sprite in sprites)
{
var go = new GameObject("Path");
go.transform.position = pos;
var sr = go.AddComponent <SpriteRenderer>();
sr.sprite = sprite;
pos.y += 0.25f;
}
}
static void GenerateTip(BezierSegment segment, bool atStart, float t, PathEnding ending, float halfThickness, TessellationOptions tessellateOptions, List <Vector2> verts, List <UInt16> inds)
{
// The tip includes the vertices at the end itself
Vector2 tan, nrm;
var pos = VectorUtils.EvalFull(segment, t, out tan, out nrm);
int indexStart = verts.Count;
switch (ending)
{
case PathEnding.Chop:
if (atStart)
{
verts.Add(pos + nrm * halfThickness);
verts.Add(pos - nrm * halfThickness);
}
else
{
// Not much, path segments are always expected to be generated perpendicular to the path
// at the segment point location, so we don't have to do anything for the ending
}
break;
case PathEnding.Square:
if (atStart)
{
verts.Add(pos + nrm * halfThickness - tan * halfThickness);
verts.Add(pos - nrm * halfThickness - tan * halfThickness);
verts.Add(pos + nrm * halfThickness);
verts.Add(pos - nrm * halfThickness);
inds.Add((UInt16)(indexStart + 0));
inds.Add((UInt16)(indexStart + 3));
inds.Add((UInt16)(indexStart + 1));
inds.Add((UInt16)(indexStart + 0));
inds.Add((UInt16)(indexStart + 2));
inds.Add((UInt16)(indexStart + 3));
}
else
{
// Relying on the last two vertices, and just adding two of our own here
verts.Add(pos + nrm * halfThickness + tan * halfThickness);
verts.Add(pos - nrm * halfThickness + tan * halfThickness);
inds.Add((UInt16)(indexStart + 0 - 2));
inds.Add((UInt16)(indexStart + 3 - 2));
inds.Add((UInt16)(indexStart + 1 - 2));
inds.Add((UInt16)(indexStart + 0 - 2));
inds.Add((UInt16)(indexStart + 2 - 2));
inds.Add((UInt16)(indexStart + 3 - 2));
}
break;
case PathEnding.Round:
float arcSign = atStart ? -1 : 1;
int arcSegments = CalculateArcSteps(halfThickness, 0, Mathf.PI, tessellateOptions);
for (int i = 1; i < arcSegments; i++)
{
float angle = Mathf.PI * (i / (float)arcSegments);
verts.Add(pos + Matrix2D.RotateLH(angle) * nrm * halfThickness * arcSign);
}
if (atStart)
{
// Note how we maintain the last two vertices being setup for connection by the rest of the path vertices
int indexTipStart = verts.Count;
verts.Add(pos + nrm * halfThickness);
verts.Add(pos - nrm * halfThickness);
for (int i = 1; i < arcSegments; i++)
{
inds.Add((UInt16)(indexTipStart + 1));
inds.Add((UInt16)(indexStart + i - 1));
inds.Add((UInt16)(indexStart + i));
}
}
else
{
inds.Add((UInt16)(indexStart - 1));
inds.Add((UInt16)(indexStart - 2));
inds.Add((UInt16)(indexStart + 0));
for (int i = 1; i < arcSegments - 1; i++)
{
inds.Add((UInt16)(indexStart - 1));
inds.Add((UInt16)(indexStart + i - 1));
inds.Add((UInt16)(indexStart + i));
}
}
break;
default:
System.Diagnostics.Debug.Assert(false); // Joining has its own function
break;
}
}