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/MapView/Map/RMMercatorToTileProjection.h

http://github.com/route-me/route-me
C Header | 67 lines | 21 code | 13 blank | 33 comment | 0 complexity | d728df593ba183eaefe0d2203861f6ae MD5 | raw file
  1. //
  2. // RMMercatorToTileProjection.h
  3. //
  4. // Copyright (c) 2008-2009, Route-Me Contributors
  5. // All rights reserved.
  6. //
  7. // Redistribution and use in source and binary forms, with or without
  8. // modification, are permitted provided that the following conditions are met:
  9. //
  10. // * Redistributions of source code must retain the above copyright notice, this
  11. // list of conditions and the following disclaimer.
  12. // * Redistributions in binary form must reproduce the above copyright notice,
  13. // this list of conditions and the following disclaimer in the documentation
  14. // and/or other materials provided with the distribution.
  15. //
  16. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17. // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18. // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19. // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  20. // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21. // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22. // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23. // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24. // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25. // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26. // POSSIBILITY OF SUCH DAMAGE.
  27. #import <Foundation/Foundation.h>
  28. #import "RMFoundation.h"
  29. #import "RMTile.h"
  30. #import "RMMercatorToTileProjection.h"
  31. @class RMMercatorToScreenProjection;
  32. /// A tile projection is a projection which turns mercators into tile coordinates.
  33. /// At time of writing, read RMFractalTileProjection to see the implementation of this.
  34. @protocol RMMercatorToTileProjection<NSObject>
  35. -(RMTilePoint) project: (RMProjectedPoint)aPoint atZoom:(float)zoom;
  36. -(RMTileRect) projectRect: (RMProjectedRect)aRect atZoom:(float)zoom;
  37. -(RMTilePoint) project: (RMProjectedPoint)aPoint atScale:(float)scale;
  38. -(RMTileRect) projectRect: (RMProjectedRect)aRect atScale:(float)scale;
  39. /// This is a helper for projectRect above. Much simpler for the caller.
  40. -(RMTileRect) project: (RMMercatorToScreenProjection*)screen;
  41. -(RMTile) normaliseTile: (RMTile) tile;
  42. -(float) normaliseZoom: (float) zoom;
  43. -(float) calculateZoomFromScale: (float) scale;
  44. -(float) calculateNormalisedZoomFromScale: (float) scale;
  45. -(float) calculateScaleFromZoom: (float) zoom;
  46. /// bounds of the earth, in projected units (meters).
  47. @property(readonly, nonatomic) RMProjectedRect planetBounds;
  48. /// Maximum zoom for which we have tile images
  49. @property(readonly, nonatomic) NSUInteger maxZoom;
  50. /// Minimum zoom for which we have tile images
  51. @property(readonly, nonatomic) NSUInteger minZoom;
  52. /// Tile side length in pixels
  53. @property(readonly, nonatomic) NSUInteger tileSideLength;
  54. @end