// Draw the pointy ends on a line.
void DrawPointyEnds(GraphicsTarget g, SymPath longPath, float pointyLengthStart, float pointyLengthEnd, float lineWidth)
{
// Get locations of points at the tip, half-way, and base of the pointy tips.
float length = longPath.BizzarroLength;
float[] distances, angles;
if (length >= pointyLengthStart + pointyLengthEnd) {
distances = new float[6] { 0, pointyLengthStart / 2, pointyLengthStart / 2, length - pointyLengthEnd - pointyLengthStart, pointyLengthEnd / 2, pointyLengthEnd / 2 };
}
else {
float scaleFactor = length / (pointyLengthStart + pointyLengthEnd);
distances = new float[6] { 0, (pointyLengthStart / 2) * scaleFactor, (pointyLengthStart / 2) * scaleFactor, 0, (pointyLengthEnd / 2) * scaleFactor, (pointyLengthEnd / 2) * scaleFactor };
}
PointF[] pointsAlongPath = longPath.FindPointsAlongLineBizzarro(distances, out angles);
// Each pointy tip is composed of a polygon of 5 points.
PointF[] tipCorners = new PointF[5];
float midpointWidth = lineWidth * 0.666F; // Makes a sort of curvy tip.
if (pointyLengthStart > 0) {
// Draw point at beginning.
tipCorners[0] = pointsAlongPath[0];
tipCorners[1] = Util.MoveDistance(pointsAlongPath[1], midpointWidth / 2, angles[1] - 90.0F);
tipCorners[4] = Util.MoveDistance(pointsAlongPath[1], midpointWidth / 2, angles[1] + 90.0F);
tipCorners[2] = Util.MoveDistance(pointsAlongPath[2], lineWidth / 2, angles[2] - 90.0F);
tipCorners[3] = Util.MoveDistance(pointsAlongPath[2], lineWidth / 2, angles[2] + 90.0F);
g.FillPolygon(pointyEndsBrush, tipCorners, true);
}
if (pointyLengthEnd > 0) {
// Draw point at end.
tipCorners[0] = pointsAlongPath[5];
tipCorners[1] = Util.MoveDistance(pointsAlongPath[4], midpointWidth / 2, angles[4] - 90.0F);
tipCorners[4] = Util.MoveDistance(pointsAlongPath[4], midpointWidth / 2, angles[4] + 90.0F);
tipCorners[2] = Util.MoveDistance(pointsAlongPath[3], lineWidth / 2, angles[3] - 90.0F);
tipCorners[3] = Util.MoveDistance(pointsAlongPath[3], lineWidth / 2, angles[3] + 90.0F);
g.FillPolygon(pointyEndsBrush, tipCorners, true);
}
}
