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Sample Programs from NeXSTEP 3.3

#if 0

  Brush.h -- Pressure sensitive paint brush

  by Peter Graffagnino, NeXT Computer Inc.

  You may freely copy, distribute, and reuse the code in this example.
  NeXT disclaims any warranty of any kind, expressed or  implied, as to its
  fitness for any particular use.

#endif


#import <objc/Object.h>

/* 
 *  A pressure sensitive brush whose size is governed by:
 *     minSize + pressureCoefficient*(inputPressure^pressureExponent)
 */

@interface Brush : Object
{
    NXColor brushColor;		
    float pressureExponent;	
    float minSize;
    float pressureCoefficient;
    double lastx, lasty, lastsize;	/* last point drawn (for connecting
					 * strokes)
					 */
}    

/* drawing the brush */
- brushMoveTo:(float)x :(float)y withPressure:(float) pressure
 dirtyRect: (NXRect *) dirty;
- brushLineTo:(float)x :(float)y withPressure:(float) pressure
 dirtyRect: (NXRect *) dirty;

/* target/action & outlet-setting methods */
- setMinSize: sender;
- setPressureExponent: sender;
- setBrushColor: sender;
- setPressureCoefficient: sender;

@end

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