text: //
  // Scratch and See 
  //
  // The project provides en effect when the user swipes the finger over one texture 
  // and by swiping reveals the texture underneath it. The effect can be applied for 
  // scratch-card action or wiping a misted glass.
  //
  // Copyright (C) 2012 http://moqod.com Andrew Kopanev <andrew@moqod.com>
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy 
  // of this software and associated documentation files (the "Software"), to deal 
  // in the Software without restriction, including without limitation the rights 
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
  // of the Software, and to permit persons to whom the Software is furnished to do so, 
  // subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all 
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
  // INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
  // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
  // FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
  // DEALINGS IN THE SOFTWARE.
  //
  
  #ifndef _MATRIX_H_
  #define _MATRIX_H_
  #import <Foundation/Foundation.h>
  
  typedef struct {
  	size_t x;
  	size_t y;
  } MDSize;
  
  MDSize MDSizeMake(size_t x,size_t y){
  	MDSize r = {x,y};
  	return r;
  }
  
  @interface MDMatrix : NSObject
  
  -(id)initWithMaxX:(size_t)x MaxY:(size_t)y;
  -(id)initWithMax:(MDSize) maxCoords;
  
  -(char)valueForCoordinates:(size_t)x y:(size_t)y;
  -(void)setValue:(char)value forCoordinates:(size_t)x y:(size_t)y;
  
  -(void)fillWithValue:(char)value;
  
  @property (readonly, assign) MDSize			max;
  
  @end
  
  #endif //_MATRIX_H_