/// <summary>
/// An array getter, optimized by reusing mappings.
/// </summary>
/// <param name="lineIndex">The line index offset.</param>
/// <param name="positionComponent">The position component.</param>
/// <param name="storage">Where to store result.</param>
public void Get(string positionComponent, uint lineIndex, LineSegment2f[] storage)
{
if (lineIndex + storage.Length >= shapeCount)
{
throw new ArgumentException("Index out of range, not that many triangles.");
}
if (indexBuffer != null)
{
uint[] indices = indexBuffer.Getui(lineIndex * 2, (uint)storage.Length * 2);
Vector2f[] data = query.Get2f(positionComponent, indices);
for (int i = 0; i < storage.Length; i++)
{
storage[i] = new LineSegment2f(data[i * 2], data[i * 2 + 1]);
}
}
else
{
Vector2f[] data = query.Get2f(positionComponent, lineIndex * 2, (uint)storage.Length * 2);
for (int i = 0; i < storage.Length; i++)
{
storage[i] = new LineSegment2f(data[i * 2], data[i * 2 + 1]);
}
}
}
//#endfor instanced to 'Double3'
//#foreach instanced to 'Float2'
/// <summary>
/// Gets line.
/// </summary>
/// <param name="index">The line index.</param>
/// <remarks>This is not performance wise getter.</remarks>
/// <returns></returns>
public LineSegment2f Get2f(uint index)
{
LineSegment2f t = new LineSegment2f();
Get(CommonComponents.Position, index, t);
return(t);
}
/// <summary>
/// Gets line.
/// </summary>
/// <param name="index">The line index.</param>
/// <param name="positionComponent">The component where we look for position, must be
/// correct format.</param>
/// <remarks>This is not performance wise getter.</remarks>
public LineSegment2f Get2f(string positionComponent, uint index)
{
LineSegment2f t = new LineSegment2f();
Get(positionComponent, index, t);
return(t);
}
LineSegment2f[] GenerateLineList(Vector2f[] list)
{
LineSegment2f[] seg = new LineSegment2f[list.Length - 1];
for (int i = 1; i < list.Length; i++)
{
seg[i - 1] = new LineSegment2f(list[i - 1], list[i]);
}
return(seg);
}
//#endfor instanced to 'Vector2d'
//#foreach instanced to 'Vector2f'
/// <summary>
/// Returns true, if p0 is upper point, p1, p2 are lower, false otherwise.
/// </summary>
static bool CalcPathIntersection(Vector2f a, Vector2f b, Vector2f c, float width,
out Vector2f p0, out Vector2f p1, out Vector2f p2)
{
// We first generate two vectors.
Vector2f dir1 = b - a;
Vector2f dir2 = c - b;
// We generate two perpendicular vectors.
Vector2f grad1 = new Vector2f(-dir1.Y, dir1.X).Normal;
Vector2f grad2 = new Vector2f(-dir2.Y, dir2.X).Normal;
// We now generate 4 line segments.
LineSegment2f seg1Up = new LineSegment2f(a + grad1 * width, b + grad1 * width);
LineSegment2f seg1Down = new LineSegment2f(a - grad1 * width, b - grad1 * width);
LineSegment2f seg2Up = new LineSegment2f(b + grad2 * width, c + grad2 * width);
LineSegment2f seg2Down = new LineSegment2f(b - grad2 * width, c - grad2 * width);
// We calculate intersections.
float t1, t2;
if (Intersection.Intersect(seg1Up, seg2Up, out t1, out t2))
{
// If they intersect, we have point 0.
p0 = seg1Up.Sample(t1);
p1 = seg1Down.B;
p2 = seg2Down.A;
return(true);
}
else if (Intersection.Intersect(seg1Down, seg2Down, out t1, out t2))
{
p0 = seg1Down.Sample(t1);
p1 = seg1Up.B;
p2 = seg2Up.A;
return(false);
}
else
{
// If result is this, we have no intersections, numeric error. We use variables of one.
p0 = seg1Up.B;
p1 = p2 = seg1Down.B;
return(true);
}
}
public void PenVG(GraphicsDevice device)
{
ICanvas canvas = new GraphicsCanvas(device, device.SwapChain, new Vector2f(1.0f, 1.0f));
// We first create all needed fills.
SolidFill solidFill = new SolidFill(Colour.Red);
Pen pen = new Pen(solidFill, 0.003f, 0.0f, OutlineEnd.Square);
Bezier2f line = new Bezier2f(new Vector2f(0.1f, 0.5f), new Vector2f(0.3f, 1.0f),
new Vector2f(0.9f, 0.5f));
Bezier2f line2 = new Bezier2f(new Vector2f(0.1f, 0.5f), new Vector2f(0.3f, 0.0f),
new Vector2f(0.9f, 0.5f));
LineSegment2f seg = new LineSegment2f(new Vector2f(0, 0.5f), new Vector2f(0.7f, 0.6f));
bool exit = false;
device.SwapChain.Window.Closed += delegate(Window w) { exit = true; };
float a = 0;
while (!exit)
{
device.SwapChain.Window.DoEvents();
using (DeviceLock l = device.Lock())
{
device.Clear(device.SwapChain, Colour.Green);
device.SetViewports(new Region2i(0, 0, (int)device.SwapChain.Width, (int)device.SwapChain.Height));
line.A = 0.5f * new Vector2f(1, 1) + new Vector2f(1, 1) * 0.5f * MathHelper.Cos(a);
line2.B = 0.5f * new Vector2f(1, 1) + new Vector2f(1, 1) * 0.5f * MathHelper.Sin(a);
// We render.
canvas.Begin(CanvasRenderFlags.None);
canvas.DrawShape(pen, line, null);
canvas.DrawShape(pen, seg, null);
canvas.DrawShape(pen, line2, null);
canvas.End();
}
device.SwapChain.Present();
a += 0.01f;
}
}
/// <summary>
/// Gets triangle.
/// </summary>
/// <param name="index">The line index.</param>
/// <remarks>This accessor is not to be used in performance critical parts of applications.</remarks>
/// <returns></returns>
public void Get(string positionComponent, uint index, LineSegment2f storage)
{
if (index >= shapeCount)
{
throw new ArgumentException("Index out of range, not that many triangles.");
}
if (indexBuffer != null)
{
uint[] indices = indexBuffer.Getui(index * 2, 2);
storage.A = query.Get2f(positionComponent, indices[0]);
storage.B = query.Get2f(positionComponent, indices[1]);
}
else
{
storage.A = query.Get2f(positionComponent, index * 2);
storage.B = query.Get2f(positionComponent, index * 2 + 1);
}
}
/// <summary>
/// An array getter, optimized by reusing mappings.
/// </summary>
/// <param name="lineIndex">The line index offset.</param>
/// <param name="positionComponent">The position component.</param>
/// <param name="count">Number of triangles.</param>
public LineSegment2f[] Get2f(string positionComponent, uint lineIndex, uint count)
{
LineSegment2f[] data = new LineSegment2f[count];
Get(positionComponent, lineIndex, data);
return(data);
}
/// <summary>
/// Gets line.
/// </summary>
/// <param name="index">The line index.</param>
/// <param name="positionComponent">The component where we look for position, must be
/// Vector2f format.</param>
/// <remarks>This is not performance wise getter.</remarks>
public void Get(uint index, LineSegment2f storage)
{
Get(CommonComponents.Position, index, storage);
}
/// <summary>
/// Fills a line at index.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="line">The triangle to be filled.</param>
public void Get(uint index, [NotNull] LineSegment2f line)
{
throw new NotImplementedException();
}
/// <summary>
/// Attempt to intersect two line segments.
/// </summary>
/// <remarks>
/// Even if the line segments do not intersect, <paramref name="t"/> and <paramref name="u"/> will be set.
/// If the lines are parallel, <paramref name="t"/> and <paramref name="u"/> are set to <see cref="float.NaN"/>.
/// </remarks>
/// <param name="other">The line to attempt intersection of this line with.</param>
/// <param name="intersectionPoint">The point of intersection if within the line segments, or empty..</param>
/// <param name="t">The distance along this line at which intersection would occur, or NaN if lines are collinear/parallel.</param>
/// <param name="u">The distance along the other line at which intersection would occur, or NaN if lines are collinear/parallel.</param>
/// <returns><c>true</c> if the line segments intersect, otherwise <c>false</c>.</returns>
public bool TryIntersect(LineSegment2f other, out Vector2f intersectionPoint, out float t, out float u)
{