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#define DEG 0.01745329251994330 enum { KR↺, KR↻, K↑, K↓, K←, K→, Ke }; enum { Cmask, Cbg, Cfg, NCOLOR, MASKCOLOR = 0x00FF00FF }; typedef struct Sprite Sprite; struct Sprite { Point p; Memimage *spr; double roll; };