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/* topblock - openGL based hack */
static void buildCarpet(ModeInfo *);
static void polygonPlane(int, int, int, int, int ,int);
static void buildBlock(ModeInfo *);
static void generateNewBlock(ModeInfo *);
static void followBlock(ModeInfo *);
static void buildBlobBlock(ModeInfo *);
static double quadrantCorrection(double,int,int,int,int);
/* this structure holds all the attributes about a block */
typedef struct blockNode {
int color; /* indexed */
int rotation; /* indexed: 0=S-N, 1=W-E, 2=N-S, 3=E-W */
GLfloat height;
GLfloat x;
GLfloat y;
int falling;
struct blockNode *next;
} NODE;
/* some handy macros and definitions */
#define blockHeight 1.49f
#define getHeight(a) (a * blockHeight)
#define getOrientation(a) (a * 90)
#define blockWidth 2.0f
#define getLocation(a) (a * blockWidth)
#define TOLERANCE 0.1f
#define cylSize 0.333334f
#define uddSize 0.4f
#define singleThick 0.29 /* defines the thickness of the carpet */
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