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ClemensFischer
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152 changed files with 11962 additions and 12115 deletions
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@ -6,152 +6,151 @@ using System.Windows.Media;
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using Avalonia;
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#endif
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namespace MapControl
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namespace MapControl;
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/// <summary>
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/// Defines the transformation between projected map coordinates in meters
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/// and view coordinates in pixels.
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/// </summary>
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public class ViewTransform
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{
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/// <summary>
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/// Defines the transformation between projected map coordinates in meters
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/// and view coordinates in pixels.
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/// Gets the scaling factor from projected map coordinates to view coordinates,
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/// as pixels per meter.
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/// </summary>
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public class ViewTransform
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public double Scale { get; private set; }
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/// <summary>
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/// Gets the rotation angle of the transform matrix.
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/// </summary>
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public double Rotation { get; private set; }
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/// <summary>
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/// Gets the transform matrix from projected map coordinates to view coordinates.
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/// </summary>
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public Matrix MapToViewMatrix { get; private set; }
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/// <summary>
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/// Gets the transform matrix from view coordinates to projected map coordinates.
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/// </summary>
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public Matrix ViewToMapMatrix { get; private set; }
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/// <summary>
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/// Transforms a Point in projected map coordinates to a Point in view coordinates.
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/// </summary>
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public Point MapToView(Point point) => MapToViewMatrix.Transform(point);
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/// <summary>
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/// Transforms a Point in view coordinates to a Point in projected map coordinates.
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/// </summary>
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public Point ViewToMap(Point point) => ViewToMapMatrix.Transform(point);
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/// <summary>
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/// Gets an axis-aligned bounding box in projected map coordinates that contains
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/// a rectangle in view coordinates.
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/// </summary>
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public Rect ViewToMapBounds(Rect rect) => TransformBounds(ViewToMapMatrix, rect.X, rect.Y, rect.Width, rect.Height);
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/// <summary>
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/// Initializes a ViewTransform from a map center point in projected coordinates,
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/// a view conter point, a scaling factor from projected coordinates to view coordinates
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/// and a rotation angle in degrees.
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/// </summary>
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public void SetTransform(Point mapCenter, Point viewCenter, double scale, double rotation)
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{
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/// <summary>
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/// Gets the scaling factor from projected map coordinates to view coordinates,
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/// as pixels per meter.
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/// </summary>
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public double Scale { get; private set; }
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Scale = scale;
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Rotation = (rotation % 360d + 540d) % 360d - 180d;
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/// <summary>
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/// Gets the rotation angle of the transform matrix.
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/// </summary>
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public double Rotation { get; private set; }
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var transform = new Matrix(scale, 0d, 0d, -scale, -scale * mapCenter.X, scale * mapCenter.Y);
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transform.Rotate(Rotation);
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transform.Translate(viewCenter.X, viewCenter.Y);
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MapToViewMatrix = transform;
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/// <summary>
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/// Gets the transform matrix from projected map coordinates to view coordinates.
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/// </summary>
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public Matrix MapToViewMatrix { get; private set; }
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transform.Invert();
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ViewToMapMatrix = transform;
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}
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/// <summary>
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/// Gets the transform matrix from view coordinates to projected map coordinates.
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/// </summary>
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public Matrix ViewToMapMatrix { get; private set; }
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/// <summary>
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/// Gets the transform Matrix for the RenderTranform of a MapTileLayer or WmtsTileMatrixLayer.
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/// </summary>
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public Matrix GetTileLayerTransform(double tileMatrixScale, Point tileMatrixTopLeft, Point tileMatrixOrigin)
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{
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var scale = Scale / tileMatrixScale;
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var transform = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
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transform.Rotate(Rotation);
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/// <summary>
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/// Transforms a Point in projected map coordinates to a Point in view coordinates.
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/// </summary>
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public Point MapToView(Point point) => MapToViewMatrix.Transform(point);
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// Tile matrix origin in map coordinates.
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//
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var mapOrigin = new Point(
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tileMatrixTopLeft.X + tileMatrixOrigin.X / tileMatrixScale,
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tileMatrixTopLeft.Y - tileMatrixOrigin.Y / tileMatrixScale);
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/// <summary>
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/// Transforms a Point in view coordinates to a Point in projected map coordinates.
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/// </summary>
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public Point ViewToMap(Point point) => ViewToMapMatrix.Transform(point);
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// Tile matrix origin in view coordinates.
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//
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var viewOrigin = MapToViewMatrix.Transform(mapOrigin);
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transform.Translate(viewOrigin.X, viewOrigin.Y);
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/// <summary>
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/// Gets an axis-aligned bounding box in projected map coordinates that contains
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/// a rectangle in view coordinates.
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/// </summary>
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public Rect ViewToMapBounds(Rect rect) => TransformBounds(ViewToMapMatrix, rect.X, rect.Y, rect.Width, rect.Height);
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return transform;
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}
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/// <summary>
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/// Initializes a ViewTransform from a map center point in projected coordinates,
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/// a view conter point, a scaling factor from projected coordinates to view coordinates
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/// and a rotation angle in degrees.
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/// </summary>
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public void SetTransform(Point mapCenter, Point viewCenter, double scale, double rotation)
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/// <summary>
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/// Gets the pixel bounds of a tile matrix.
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/// </summary>
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public Rect GetTileMatrixBounds(double tileMatrixScale, Point tileMatrixTopLeft, double viewWidth, double viewHeight)
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{
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var scale = tileMatrixScale / Scale;
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var transform = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
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transform.Rotate(-Rotation);
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// View origin in map coordinates.
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//
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var origin = ViewToMapMatrix.Transform(new Point());
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// Translation from origin to tile matrix origin in pixels.
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//
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transform.Translate(
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tileMatrixScale * (origin.X - tileMatrixTopLeft.X),
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tileMatrixScale * (tileMatrixTopLeft.Y - origin.Y));
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// Transform view bounds to tile pixel bounds.
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//
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return TransformBounds(transform, 0d, 0d, viewWidth, viewHeight);
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}
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public static Rect TransformBounds(Matrix transform, double x, double y, double width, double height)
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{
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if (transform.M12 == 0d && transform.M21 == 0d)
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{
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Scale = scale;
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Rotation = (rotation % 360d + 540d) % 360d - 180d;
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x = x * transform.M11 + transform.OffsetX;
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y = y * transform.M22 + transform.OffsetY;
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width *= transform.M11;
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height *= transform.M22;
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var transform = new Matrix(scale, 0d, 0d, -scale, -scale * mapCenter.X, scale * mapCenter.Y);
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transform.Rotate(Rotation);
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transform.Translate(viewCenter.X, viewCenter.Y);
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MapToViewMatrix = transform;
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transform.Invert();
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ViewToMapMatrix = transform;
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}
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/// <summary>
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/// Gets the transform Matrix for the RenderTranform of a MapTileLayer or WmtsTileMatrixLayer.
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/// </summary>
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public Matrix GetTileLayerTransform(double tileMatrixScale, Point tileMatrixTopLeft, Point tileMatrixOrigin)
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{
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var scale = Scale / tileMatrixScale;
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var transform = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
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transform.Rotate(Rotation);
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// Tile matrix origin in map coordinates.
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//
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var mapOrigin = new Point(
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tileMatrixTopLeft.X + tileMatrixOrigin.X / tileMatrixScale,
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tileMatrixTopLeft.Y - tileMatrixOrigin.Y / tileMatrixScale);
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// Tile matrix origin in view coordinates.
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//
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var viewOrigin = MapToViewMatrix.Transform(mapOrigin);
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transform.Translate(viewOrigin.X, viewOrigin.Y);
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return transform;
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}
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/// <summary>
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/// Gets the pixel bounds of a tile matrix.
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/// </summary>
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public Rect GetTileMatrixBounds(double tileMatrixScale, Point tileMatrixTopLeft, double viewWidth, double viewHeight)
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{
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var scale = tileMatrixScale / Scale;
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var transform = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
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transform.Rotate(-Rotation);
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// View origin in map coordinates.
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//
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var origin = ViewToMapMatrix.Transform(new Point());
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// Translation from origin to tile matrix origin in pixels.
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//
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transform.Translate(
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tileMatrixScale * (origin.X - tileMatrixTopLeft.X),
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tileMatrixScale * (tileMatrixTopLeft.Y - origin.Y));
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// Transform view bounds to tile pixel bounds.
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//
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return TransformBounds(transform, 0d, 0d, viewWidth, viewHeight);
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}
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public static Rect TransformBounds(Matrix transform, double x, double y, double width, double height)
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{
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if (transform.M12 == 0d && transform.M21 == 0d)
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if (width < 0d)
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{
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x = x * transform.M11 + transform.OffsetX;
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y = y * transform.M22 + transform.OffsetY;
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width *= transform.M11;
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height *= transform.M22;
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if (width < 0d)
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{
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width = -width;
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x -= width;
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}
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if (height < 0d)
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{
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height = -height;
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y -= height;
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}
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}
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else
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{
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var p1 = transform.Transform(new Point(x, y));
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var p2 = transform.Transform(new Point(x, y + height));
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var p3 = transform.Transform(new Point(x + width, y));
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var p4 = transform.Transform(new Point(x + width, y + height));
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x = Math.Min(p1.X, Math.Min(p2.X, Math.Min(p3.X, p4.X)));
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y = Math.Min(p1.Y, Math.Min(p2.Y, Math.Min(p3.Y, p4.Y)));
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width = Math.Max(p1.X, Math.Max(p2.X, Math.Max(p3.X, p4.X))) - x;
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height = Math.Max(p1.Y, Math.Max(p2.Y, Math.Max(p3.Y, p4.Y))) - y;
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width = -width;
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x -= width;
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}
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return new Rect(x, y, width, height);
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if (height < 0d)
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{
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height = -height;
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y -= height;
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}
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}
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else
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{
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var p1 = transform.Transform(new Point(x, y));
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var p2 = transform.Transform(new Point(x, y + height));
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var p3 = transform.Transform(new Point(x + width, y));
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var p4 = transform.Transform(new Point(x + width, y + height));
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x = Math.Min(p1.X, Math.Min(p2.X, Math.Min(p3.X, p4.X)));
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y = Math.Min(p1.Y, Math.Min(p2.Y, Math.Min(p3.Y, p4.Y)));
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width = Math.Max(p1.X, Math.Max(p2.X, Math.Max(p3.X, p4.X))) - x;
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height = Math.Max(p1.Y, Math.Max(p2.Y, Math.Max(p3.Y, p4.Y))) - y;
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}
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return new Rect(x, y, width, height);
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}
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}
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