#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>

#import <math.h>
#import <string.h>

#define DIMENSION 300
#define DELTA     1e-8

#define SCRAMBLE  200

typedef struct {
    double x, y, z;
    int index;
} Vertex, *VPtr;

typedef enum {
    VIS_F_1 = 1,
    VIS_F_2,
    VIS_F_3
} VISIBILITY;

typedef enum {
    ROT_X = 0,
    ROT_Y,
    ROT_Z
} ROT_ACTIVE;

@interface Rubik : NSView
{
    id con;

    Vertex vertices[8];
    Vertex indexed[8];
    Vertex active[8];
    Vertex sorted[8];

    double angle;

    ROT_ACTIVE rprev, rcur;

    VISIBILITY vis;
    int visface[3];

    int face[6][4];
    int adjacent[6][4];
    int edge[6][4];

    NSColor *colors[8];
    int data[6][3][3];
}

- initAtPoint:(NSPoint)aPoint controller:(id)theCon;

- resetCube;

- scramble;

- rotate:(Vertex *)vp aboutUnitVector:(ROT_ACTIVE)rv
   angle:(double)theta;

- recomputeGeometry;

- angle:(id)sender;

- (BOOL)solved;

- (void)drawRect:(NSRect)aRect;

- (int)visFaceClicked:(NSPoint)loc;

- rotateFace:(int)f clockwise:(BOOL)flag;

- (void)mouseDown:(NSEvent *)theEvent;
- (void)rightMouseDown:(NSEvent *)theEvent;

@end