/// <summary>
/// Creates the positions for the specified line segments.
/// </summary>
/// <param name="points">
/// The points of the line segments.
/// </param>
/// <param name="thickness">
/// The thickness of the line.
/// </param>
/// <param name="depthOffset">
/// The depth offset. A positive number (e.g. 0.0001) moves the point towards the camera.
/// </param>
/// <param name="clipping">
/// The clipping.
/// </param>
/// <returns>
/// The positions collection.
/// </returns>
public Point3DCollection CreatePositions(
IList <Point3D> points,
double thickness = 1.0,
double depthOffset = 0.0,
CohenSutherlandClipping clipping = null)
{
var halfThickness = thickness * 0.5;
var segmentCount = points.Count / 2;
var positions = new Point3DCollection(segmentCount * 4);
for (int i = 0; i < segmentCount; i++)
{
int startIndex = i * 2;
var startPoint = points[startIndex];
var endPoint = points[startIndex + 1];
// Transform the start and end points to screen space
var s0 = (Point4D)startPoint * this.visualToScreen;
var s1 = (Point4D)endPoint * this.visualToScreen;
if (clipping != null)
{
// Apply a clipping rectangle
var x0 = s0.X / s0.W;
var y0 = s0.Y / s0.W;
var x1 = s1.X / s1.W;
var y1 = s1.Y / s1.W;
if (!clipping.ClipLine(ref x0, ref y0, ref x1, ref y1))
{
continue;
}
s0.X = x0 * s0.W;
s0.Y = y0 * s0.W;
s1.X = x1 * s1.W;
s1.Y = y1 * s1.W;
}
var lx = (s1.X / s1.W) - (s0.X / s0.W);
var ly = (s1.Y / s1.W) - (s0.Y / s0.W);
var l2 = (lx * lx) + (ly * ly);
var p00 = s0;
var p01 = s0;
var p10 = s1;
var p11 = s1;
if (l2.Equals(0))
{
// coinciding points (in world space or screen space)
var dz = halfThickness;
// TODO: make a square with the thickness as side length
p00.X -= dz * p00.W;
p00.Y -= dz * p00.W;
p01.X -= dz * p01.W;
p01.Y += dz * p01.W;
p10.X += dz * p10.W;
p10.Y -= dz * p10.W;
p11.X += dz * p11.W;
p11.Y += dz * p11.W;
}
else
{
var m = halfThickness / Math.Sqrt(l2);
// the normal (dx,dy)
var dx = -ly * m;
var dy = lx * m;
// segment start points
p00.X += dx * p00.W;
p00.Y += dy * p00.W;
p01.X -= dx * p01.W;
p01.Y -= dy * p01.W;
// segment end points
p10.X += dx * p10.W;
p10.Y += dy * p10.W;
p11.X -= dx * p11.W;
p11.Y -= dy * p11.W;
}
if (!depthOffset.Equals(0))
{
// Adjust the z-coordinate by the depth offset
p00.Z -= depthOffset;
p01.Z -= depthOffset;
p10.Z -= depthOffset;
p11.Z -= depthOffset;
// Transform from screen space to world space
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X / p00.W, p00.Y / p00.W, p00.Z / p00.W));
positions.Add(new Point3D(p01.X / p00.W, p01.Y / p01.W, p01.Z / p01.W));
positions.Add(new Point3D(p10.X / p00.W, p10.Y / p10.W, p10.Z / p10.W));
positions.Add(new Point3D(p11.X / p00.W, p11.Y / p11.W, p11.Z / p11.W));
}
else
{
// Transform from screen space to world space
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X, p00.Y, p00.Z));
positions.Add(new Point3D(p01.X, p01.Y, p01.Z));
positions.Add(new Point3D(p10.X, p10.Y, p10.Z));
positions.Add(new Point3D(p11.X, p11.Y, p11.Z));
}
}
positions.Freeze();
return(positions);
}
/// <summary>
/// Creates the positions for the specified line segments.
/// </summary>
/// <param name="points">
/// The points of the line segments.
/// </param>
/// <param name="thickness">
/// The thickness of the line.
/// </param>
/// <param name="depthOffset">
/// The depth offset. A positive number (e.g. 0.0001) moves the point towards the camera.
/// </param>
/// <param name="clipping">
/// The clipping.
/// </param>
/// <returns>
/// The positions collection.
/// </returns>
public Point3DCollection CreatePositions(
IList<Point3D> points,
double thickness = 1.0,
double depthOffset = 0.0,
CohenSutherlandClipping clipping = null)
{
var halfThickness = thickness * 0.5;
var segmentCount = points.Count / 2;
var positions = new Point3DCollection(segmentCount * 4);
for (int i = 0; i < segmentCount; i++)
{
int startIndex = i * 2;
var startPoint = points[startIndex];
var endPoint = points[startIndex + 1];
// Transform the start and end points to screen space
var s0 = (Point4D)startPoint * this.visualToScreen;
var s1 = (Point4D)endPoint * this.visualToScreen;
if (clipping != null)
{
// Apply a clipping rectangle
var x0 = s0.X / s0.W;
var y0 = s0.Y / s0.W;
var x1 = s1.X / s1.W;
var y1 = s1.Y / s1.W;
if (!clipping.ClipLine(ref x0, ref y0, ref x1, ref y1))
{
continue;
}
s0.X = x0 * s0.W;
s0.Y = y0 * s0.W;
s1.X = x1 * s1.W;
s1.Y = y1 * s1.W;
}
var lx = (s1.X / s1.W) - (s0.X / s0.W);
var ly = (s1.Y / s1.W) - (s0.Y / s0.W);
var l2 = (lx * lx) + (ly * ly);
var p00 = s0;
var p01 = s0;
var p10 = s1;
var p11 = s1;
if (l2.Equals(0))
{
// coinciding points (in world space or screen space)
var dz = halfThickness;
// TODO: make a square with the thickness as side length
p00.X -= dz * p00.W;
p00.Y -= dz * p00.W;
p01.X -= dz * p01.W;
p01.Y += dz * p01.W;
p10.X += dz * p10.W;
p10.Y -= dz * p10.W;
p11.X += dz * p11.W;
p11.Y += dz * p11.W;
}
else
{
var m = halfThickness / Math.Sqrt(l2);
// the normal (dx,dy)
var dx = -ly * m;
var dy = lx * m;
// segment start points
p00.X += dx * p00.W;
p00.Y += dy * p00.W;
p01.X -= dx * p01.W;
p01.Y -= dy * p01.W;
// segment end points
p10.X += dx * p10.W;
p10.Y += dy * p10.W;
p11.X -= dx * p11.W;
p11.Y -= dy * p11.W;
}
if (!depthOffset.Equals(0))
{
// Adjust the z-coordinate by the depth offset
p00.Z -= depthOffset;
p01.Z -= depthOffset;
p10.Z -= depthOffset;
p11.Z -= depthOffset;
// Transform from screen space to world space
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X / p00.W, p00.Y / p00.W, p00.Z / p00.W));
positions.Add(new Point3D(p01.X / p00.W, p01.Y / p01.W, p01.Z / p01.W));
positions.Add(new Point3D(p10.X / p00.W, p10.Y / p10.W, p10.Z / p10.W));
positions.Add(new Point3D(p11.X / p00.W, p11.Y / p11.W, p11.Z / p11.W));
}
else
{
// Transform from screen space to world space
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X, p00.Y, p00.Z));
positions.Add(new Point3D(p01.X, p01.Y, p01.Z));
positions.Add(new Point3D(p10.X, p10.Y, p10.Z));
positions.Add(new Point3D(p11.X, p11.Y, p11.Z));
}
}
positions.Freeze();
return positions;
}
/// <summary>
/// Creates the positions for the specified line segments.
/// </summary>
/// <param name="points">
/// The points of the line segments.
/// </param>
/// <param name="thickness">
/// The thickness of the line.
/// </param>
/// <param name="depthOffset">
/// The depth offset. A positive number (e.g. 0.0001) moves the point towards the camera.
/// </param>
/// <param name="clipping">
/// The clipping.
/// </param>
/// <returns>
/// The positions collection.
/// </returns>
public Point3DCollection CreatePositions(
IList <Point3D> points,
double thickness = 1.0,
double depthOffset = 0.0,
CohenSutherlandClipping clipping = null)
{
double halfThickness = thickness * 0.5;
int segmentCount = points.Count / 2;
var positions = new Point3DCollection(segmentCount * 4);
for (int i = 0; i < segmentCount; i++)
{
int startIndex = i * 2;
Point3D startPoint = points[startIndex];
Point3D endPoint = points[startIndex + 1];
var s0 = (Point4D)startPoint * this.visualToScreen;
var s1 = (Point4D)endPoint * this.visualToScreen;
if (clipping != null)
{
double x0 = s0.X / s0.W;
double y0 = s0.Y / s0.W;
double x1 = s1.X / s1.W;
double y1 = s1.Y / s1.W;
if (!clipping.ClipLine(ref x0, ref y0, ref x1, ref y1))
{
continue;
}
s0.X = x0 * s0.W;
s0.Y = y0 * s0.W;
s1.X = x1 * s1.W;
s1.Y = y1 * s1.W;
}
double lx = s1.X / s1.W - s0.X / s0.W;
double ly = s1.Y / s1.W - s0.Y / s0.W;
double m = halfThickness / Math.Sqrt(lx * lx + ly * ly);
double dx = -ly * m;
double dy = lx * m;
var p00 = s0;
var p01 = s0;
var p10 = s1;
var p11 = s1;
p00.X += dx * p00.W;
p00.Y += dy * p00.W;
p01.X -= dx * p01.W;
p01.Y -= dy * p01.W;
p10.X += dx * p10.W;
p10.Y += dy * p10.W;
p11.X -= dx * p11.W;
p11.Y -= dy * p11.W;
if (depthOffset != 0)
{
p00.Z -= depthOffset;
p01.Z -= depthOffset;
p10.Z -= depthOffset;
p11.Z -= depthOffset;
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X / p00.W, p00.Y / p00.W, p00.Z / p00.W));
positions.Add(new Point3D(p01.X / p00.W, p01.Y / p01.W, p01.Z / p01.W));
positions.Add(new Point3D(p10.X / p00.W, p10.Y / p10.W, p10.Z / p10.W));
positions.Add(new Point3D(p11.X / p00.W, p11.Y / p11.W, p11.Z / p11.W));
}
else
{
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X, p00.Y, p00.Z));
positions.Add(new Point3D(p01.X, p01.Y, p01.Z));
positions.Add(new Point3D(p10.X, p10.Y, p10.Z));
positions.Add(new Point3D(p11.X, p11.Y, p11.Z));
}
}
positions.Freeze();
return(positions);
}
/// <summary>
/// Creates the positions for the specified line segments.
/// </summary>
/// <param name="points">
/// The points of the line segments.
/// </param>
/// <param name="thickness">
/// The thickness of the line.
/// </param>
/// <param name="depthOffset">
/// The depth offset. A positive number (e.g. 0.0001) moves the point towards the camera.
/// </param>
/// <param name="clipping">
/// The clipping.
/// </param>
/// <returns>
/// The positions collection.
/// </returns>
public Point3DCollection CreatePositions(
IList<Point3D> points,
double thickness = 1.0,
double depthOffset = 0.0,
CohenSutherlandClipping clipping = null)
{
double halfThickness = thickness * 0.5;
int segmentCount = points.Count / 2;
var positions = new Point3DCollection(segmentCount * 4);
for (int i = 0; i < segmentCount; i++)
{
int startIndex = i * 2;
Point3D startPoint = points[startIndex];
Point3D endPoint = points[startIndex + 1];
var s0 = (Point4D)startPoint * this.visualToScreen;
var s1 = (Point4D)endPoint * this.visualToScreen;
if (clipping != null)
{
double x0 = s0.X / s0.W;
double y0 = s0.Y / s0.W;
double x1 = s1.X / s1.W;
double y1 = s1.Y / s1.W;
if (!clipping.ClipLine(ref x0, ref y0, ref x1, ref y1))
{
continue;
}
s0.X = x0 * s0.W;
s0.Y = y0 * s0.W;
s1.X = x1 * s1.W;
s1.Y = y1 * s1.W;
}
double lx = s1.X / s1.W - s0.X / s0.W;
double ly = s1.Y / s1.W - s0.Y / s0.W;
double m = halfThickness / Math.Sqrt(lx * lx + ly * ly);
double dx = -ly * m;
double dy = lx * m;
var p00 = s0;
var p01 = s0;
var p10 = s1;
var p11 = s1;
p00.X += dx * p00.W;
p00.Y += dy * p00.W;
p01.X -= dx * p01.W;
p01.Y -= dy * p01.W;
p10.X += dx * p10.W;
p10.Y += dy * p10.W;
p11.X -= dx * p11.W;
p11.Y -= dy * p11.W;
if (depthOffset != 0)
{
p00.Z -= depthOffset;
p01.Z -= depthOffset;
p10.Z -= depthOffset;
p11.Z -= depthOffset;
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X / p00.W, p00.Y / p00.W, p00.Z / p00.W));
positions.Add(new Point3D(p01.X / p00.W, p01.Y / p01.W, p01.Z / p01.W));
positions.Add(new Point3D(p10.X / p00.W, p10.Y / p10.W, p10.Z / p10.W));
positions.Add(new Point3D(p11.X / p00.W, p11.Y / p11.W, p11.Z / p11.W));
}
else
{
p00 *= this.screenToVisual;
p01 *= this.screenToVisual;
p10 *= this.screenToVisual;
p11 *= this.screenToVisual;
positions.Add(new Point3D(p00.X, p00.Y, p00.Z));
positions.Add(new Point3D(p01.X, p01.Y, p01.Z));
positions.Add(new Point3D(p10.X, p10.Y, p10.Z));
positions.Add(new Point3D(p11.X, p11.Y, p11.Z));
}
}
positions.Freeze();
return positions;
}