public override void AddToPath(IGraphicsPath graphicsPath)
{
var pathData = graphicsPath.PathData;
var points = pathData.Points;
if (points.Length <= 0)
{
return;
}
// Important for custom line caps. Force the path the close with an explicit line, not just an implicit close of the figure.
var last = points.Length - 1;
if (!points[0].Equals(points[last]))
{
var i = last;
while (i > 0 && pathData.Types[i] > 0)
{
--i;
}
graphicsPath.AddLine(points[last], points[i]);
}
graphicsPath.CloseFigure();
}
private static IGraphicsPath ConvertEnvelope(IDisplay display, IEnvelope envelope, IGraphicsPath gp)
{
double minx = envelope.minx, miny = envelope.miny;
double maxx = envelope.maxx, maxy = envelope.maxy;
display.World2Image(ref minx, ref miny);
display.World2Image(ref maxx, ref maxy);
gp.StartFigure();
gp.AddLine((float)minx, (float)miny, (float)maxx, (float)miny);
gp.AddLine((float)maxx, (float)miny, (float)maxx, (float)maxy);
gp.AddLine((float)maxx, (float)maxy, (float)minx, (float)maxy);
gp.CloseFigure();
return(gp);
}
/// <summary>
/// Draws this object to the <see cref="T:EscherTiler.Graphics.IGraphics" /> provided.
/// </summary>
/// <param name="graphics">The graphics object to use to draw this object.</param>
public override void Draw(IGraphics graphics)
{
if (_resourceManager == null)
{
throw new ObjectDisposedException(nameof(ShapeController));
}
graphics.ResourceManager = _resourceManager;
foreach (Shape shape in Shapes)
{
using (IGraphicsPath path = graphics.CreatePath())
{
bool first = true;
foreach (Vertex vertex in shape.Vertices)
{
if (first)
{
path.Start(vertex.Location);
}
else
{
path.AddLine(vertex.Location);
}
first = false;
}
path.End();
graphics.DrawPath(path);
}
}
}
private static IGraphicsPath ConvertPolygon(IDisplay display, IPolygon polygon, IGraphicsPath gp)
{
//if (polygon == null || polygon.RingCount == 0)
// return null;
for (int r = 0; r < polygon.RingCount; r++)
{
bool first = true;
int count = 0;
IRing ring = polygon[r];
int pCount = ring.PointCount;
//double o_x = -1e10, o_y = -1e10;
float o_x = float.MinValue, o_y = float.MinValue;
gp.StartFigure();
for (int p = 0; p < pCount; p++)
{
IPoint point = ring[p];
double x = point.X, y = point.Y;
display.World2Image(ref x, ref y);
//
// Auf 0.1 Pixel runden, sonst kann es bei fast
// horizontalen (vertikalen) Linien zu Fehlern kommen
// -> Eine hälfte (beim Bruch) wird nicht mehr gezeichnet
//
x = Math.Round(x, 1);
y = Math.Round(y, 1);
if (!((float)o_x == (float)x &&
(float)o_y == (float)y))
{
if (!first)
{
gp.AddLine(
(float)o_x,
(float)o_y,
(float)x,
(float)y);
count++;
}
else
{
first = false;
}
}
o_x = (float)x;
o_y = (float)y;
}
if (count > 0)
{
gp.CloseFigure();
}
}
return(gp);
}
/// <summary>
/// Adds the line to the given <paramref name="path" /> after transforming it by the given
/// <paramref name="transform" />.
/// </summary>
/// <param name="path">The path to add the line to.</param>
/// <param name="transform">The transform.</param>
/// <param name="reverse">If set to <see langword="true" />, add the line from <see cref="Start" /> to <see cref="End" />.</param>
public void AddToPath(IGraphicsPath path, Matrix3x2 transform, bool reverse)
{
path.AddLine(Vector2.Transform(reverse ? Start : End, transform));
}
/// <summary>
/// Adds a line to the path
/// </summary>
/// <param name="path">Path to add the line to</param>
/// <param name="start">Starting point for the line</param>
/// <param name="end">Ending point for the line</param>
public static void AddLine(this IGraphicsPath path, PointF start, PointF end)
{
path.AddLine(start.X, start.Y, end.X, end.Y);
}
public override void AddToPath(IGraphicsPath graphicsPath)
{
if (Start == End)
{
return;
}
if (RadiusX == 0.0f && RadiusY == 0.0f)
{
graphicsPath.AddLine(Start, End);
return;
}
var sinPhi = Math.Sin(Angle * RadiansPerDegree);
var cosPhi = Math.Cos(Angle * RadiansPerDegree);
var x1dash = cosPhi * (Start.X - End.X) / 2.0 + sinPhi * (Start.Y - End.Y) / 2.0;
var y1dash = -sinPhi * (Start.X - End.X) / 2.0 + cosPhi * (Start.Y - End.Y) / 2.0;
Double root;
var numerator = RadiusX * RadiusX * RadiusY * RadiusY - RadiusX * RadiusX * y1dash * y1dash -
RadiusY * RadiusY * x1dash * x1dash;
var rx = RadiusX;
var ry = RadiusY;
if (numerator < 0.0)
{
var s = (Single)Math.Sqrt(1.0 - numerator / (RadiusX * RadiusX * RadiusY * RadiusY));
rx *= s;
ry *= s;
root = 0.0;
}
else
{
root = (Size == SvgArcSize.Large && Sweep == SvgArcSweep.Positive ||
Size == SvgArcSize.Small && Sweep == SvgArcSweep.Negative
? -1.0
: 1.0) * Math.Sqrt(numerator /
(RadiusX * RadiusX * y1dash * y1dash + RadiusY * RadiusY * x1dash * x1dash));
}
var cxdash = root * rx * y1dash / ry;
var cydash = -root * ry * x1dash / rx;
var cx = cosPhi * cxdash - sinPhi * cydash + (Start.X + End.X) / 2.0;
var cy = sinPhi * cxdash + cosPhi * cydash + (Start.Y + End.Y) / 2.0;
var theta1 = CalculateVectorAngle(1.0, 0.0, (x1dash - cxdash) / rx, (y1dash - cydash) / ry);
var dtheta = CalculateVectorAngle((x1dash - cxdash) / rx, (y1dash - cydash) / ry, (-x1dash - cxdash) / rx,
(-y1dash - cydash) / ry);
if (Sweep == SvgArcSweep.Negative && dtheta > 0)
{
dtheta -= 2.0 * Math.PI;
}
else if (Sweep == SvgArcSweep.Positive && dtheta < 0)
{
dtheta += 2.0 * Math.PI;
}
var segments = (Int32)Math.Ceiling(Math.Abs(dtheta / (Math.PI / 2.0)));
var delta = dtheta / segments;
var t = 8.0 / 3.0 * Math.Sin(delta / 4.0) * Math.Sin(delta / 4.0) / Math.Sin(delta / 2.0);
var startX = Start.X;
var startY = Start.Y;
for (var i = 0; i < segments; ++i)
{
var cosTheta1 = Math.Cos(theta1);
var sinTheta1 = Math.Sin(theta1);
var theta2 = theta1 + delta;
var cosTheta2 = Math.Cos(theta2);
var sinTheta2 = Math.Sin(theta2);
var endpointX = cosPhi * rx * cosTheta2 - sinPhi * ry * sinTheta2 + cx;
var endpointY = sinPhi * rx * cosTheta2 + cosPhi * ry * sinTheta2 + cy;
var dx1 = t * (-cosPhi * rx * sinTheta1 - sinPhi * ry * cosTheta1);
var dy1 = t * (-sinPhi * rx * sinTheta1 + cosPhi * ry * cosTheta1);
var dxe = t * (cosPhi * rx * sinTheta2 + sinPhi * ry * cosTheta2);
var dye = t * (sinPhi * rx * sinTheta2 - cosPhi * ry * cosTheta2);
graphicsPath.AddBezier(startX, startY, (Single)(startX + dx1), (Single)(startY + dy1),
(Single)(endpointX + dxe), (Single)(endpointY + dye), (Single)endpointX, (Single)endpointY);
theta1 = theta2;
startX = (Single)endpointX;
startY = (Single)endpointY;
}
}
/// <summary>
/// Adds a single line to the path
/// </summary>
/// <param name="point1">Starting point for the line</param>
/// <param name="point2">Ending point for the line</param>
public void AddLine(Point point1, Point point2)
{
inner.AddLine(point1, point2);
}
public override void AddToPath(IGraphicsPath graphicsPath)
{
graphicsPath.AddLine(Start, End);
}
/// <summary>
/// Adds the line to the given <paramref name="path" /> after transforming it by the given
/// <paramref name="transform" />.
/// </summary>
/// <param name="path">The path to add the line to.</param>
/// <param name="transform">The transform.</param>
/// <param name="reverse">If set to <see langword="true" />, add the line from <see cref="Start" /> to <see cref="End" />.</param>
public void AddToPath(IGraphicsPath path, Matrix3x2 transform, bool reverse)
{
path.AddLine(Vector2.Transform(reverse ? Start : End, transform));
}
