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engines/ultima/nuvie/misc/u6_line_walker.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef NUVIE_MISC_U6_LINE_WALKER_H
+#define NUVIE_MISC_U6_LINE_WALKER_H
+
+#include "ultima/nuvie/core/nuvie_defs.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+class U6LineWalker {
+protected:
+	uint32 start_x, start_y;
+	uint32 end_x, end_y;
+
+	sint32 xoffset[2], yoffset[2];
+	sint32 line_inc[2];
+	sint32 line_counter;
+
+	uint32 cur_x, cur_y;
+	uint32 max_length;
+
+	uint32 cur_step;
+
+public:
+	U6LineWalker(uint32 sx, uint32 sy, uint32 ex, uint32 ey);
+	virtual ~U6LineWalker();
+
+	bool step();
+	bool next(uint32 *x, uint32 *y);
+
+};
+
+} // End of namespace Nuvie
+} // End of namespace Ultima
+
+#endif