Initial commit

engines/saga/isomap.h

@@ -0,0 +1,286 @@
+/* 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/>.
+ *
+ */
+
+// Isometric level module - private header
+
+#ifndef SAGA_ISOMAP_H
+#define SAGA_ISOMAP_H
+
+#include "saga/actor.h"
+
+namespace Saga {
+
+#define ITE_OBJ_MAP 14
+
+#define SAGA_ISOTILE_WIDTH 32
+#define SAGA_ISOTILE_BASEHEIGHT 15
+#define SAGA_TILE_NOMINAL_H 16
+#define SAGA_MAX_TILE_H 64
+
+#define SAGA_TILEPLATFORMDATA_LEN 136
+#define SAGA_PLATFORM_W 8
+#define SAGA_MAX_PLATFORM_H 16
+
+#define SAGA_TILEMAP_LEN 514
+#define SAGA_TILEMAP_W 16
+#define SAGA_TILEMAP_H 16
+
+#define SAGA_METATILEDATA_LEN 36
+
+#define SAGA_MULTI_TILE (1 << 15)
+
+#define SAGA_SCROLL_LIMIT_X1 32
+#define SAGA_SCROLL_LIMIT_X2 64
+#define SAGA_SCROLL_LIMIT_Y1 8
+#define SAGA_SCROLL_LIMIT_Y2 32
+
+#define SAGA_DRAGON_SEARCH_CENTER     24
+#define SAGA_DRAGON_SEARCH_DIAMETER   (SAGA_DRAGON_SEARCH_CENTER * 2)
+
+#define SAGA_SEARCH_CENTER     15
+#define SAGA_SEARCH_DIAMETER   (SAGA_SEARCH_CENTER * 2)
+#define SAGA_SEARCH_QUEUE_SIZE 128
+#define SAGA_IMPASSABLE                              ((1 << kTerrBlock) | (1 << kTerrWater))
+
+#define SAGA_STRAIGHT_NORMAL_COST			4
+#define SAGA_DIAG_NORMAL_COST				6
+
+#define SAGA_STRAIGHT_EASY_COST				2
+#define SAGA_DIAG_EASY_COST					3
+
+#define SAGA_STRAIGHT_HARD_COST				9
+#define SAGA_DIAG_HARD_COST					10
+#define SAGA_MAX_PATH_DIRECTIONS			256
+
+enum TerrainTypes {
+	kTerrNone	= 0,
+	kTerrPath	= 1,
+	kTerrRough	= 2,
+	kTerrBlock	= 3,
+	kTerrWater	= 4,
+	kTerrLast	= 5
+};
+
+enum TileMapEdgeType {
+	kEdgeTypeBlack	= 0,
+	kEdgeTypeFill0	= 1,
+	kEdgeTypeFill1	= 2,
+	kEdgeTypeRpt	= 3,
+	kEdgeTypeWrap	= 4
+};
+
+struct IsoTileData {
+	byte height;
+	size_t tileSize;
+	int8 attributes;
+	byte *tilePointer;
+	uint16 terrainMask;
+	byte FGDBGDAttr;
+	int8 getMaskRule() const {
+		return attributes & 0x0F;
+	}
+	byte getFGDAttr() const {
+		return FGDBGDAttr >> 4;
+	}
+	byte getBGDAttr() const {
+		return FGDBGDAttr & 0x0F;
+	}
+	uint16 getFGDMask() const {
+		return 1 << getFGDAttr();
+	}
+	uint16 getBGDMask() const {
+		return 1 << getBGDAttr();
+	}
+};
+
+struct TilePlatformData {
+	int16 metaTile;
+	int16 height;
+	int16 highestPixel;
+	byte vBits;
+	byte uBits;
+	int16 tiles[SAGA_PLATFORM_W][SAGA_PLATFORM_W];
+};
+
+struct TileMapData {
+	byte edgeType;
+	int16 tilePlatforms[SAGA_TILEMAP_W][SAGA_TILEMAP_H];
+};
+
+struct MetaTileData {
+	uint16 highestPlatform;
+	uint16 highestPixel;
+	int16 stack[SAGA_MAX_PLATFORM_H];
+};
+
+struct MultiTileEntryData {
+	int16 offset;
+	byte u;
+	byte v;
+	byte h;
+	byte uSize;
+	byte vSize;
+	byte numStates;
+	byte currentState;
+};
+
+
+
+
+
+class IsoMap {
+public:
+	IsoMap(SagaEngine *vm);
+	~IsoMap() {
+	}
+	void loadImages(const ByteArray &resourceData);
+	void loadMap(const ByteArray &resourceData);
+	void loadPlatforms(const ByteArray &resourceData);
+	void loadMetaTiles(const ByteArray &resourceData);
+	void loadMulti(const ByteArray &resourceData);
+	void clear();
+	void draw();
+	void drawSprite(SpriteList &spriteList, int spriteNumber, const Location &location, const Point &screenPosition, int scale);
+	void adjustScroll(bool jump);
+	void tileCoordsToScreenPoint(const Location &location, Point &position) {
+		position.x = location.u() - location.v() + (128 * SAGA_TILEMAP_W) - _viewScroll.x + 16;
+		position.y = -(location.uv() >> 1) + (128 * SAGA_TILEMAP_W) - _viewScroll.y - location.z;
+	}
+	void screenPointToTileCoords(const Point &position, Location &location);
+	void placeOnTileMap(const Location &start, Location &result, int16 distance, uint16 direction);
+	void findDragonTilePath(ActorData* actor, const Location &start, const Location &end, uint16 initialDirection);
+	bool findNearestChasm(int16 &u0, int16 &v0, uint16 &direction);
+	void findTilePath(ActorData* actor, const Location &start, const Location &end);
+	bool nextTileTarget(ActorData* actor);
+	void setTileDoorState(int doorNumber, int doorState);
+	Point getMapPosition() { return _mapPosition; }
+	void setMapPosition(int x, int y);
+	int16 getTileIndex(int16 u, int16 v, int16 z);
+
+private:
+	void drawTiles(const Location *location);
+	void drawMetaTile(uint16 metaTileIndex, const Point &point, int16 absU, int16 absV);
+	void drawSpriteMetaTile(uint16 metaTileIndex, const Point &point, Location &location, int16 absU, int16 absV);
+	void drawPlatform(uint16 platformIndex, const Point &point, int16 absU, int16 absV, int16 absH);
+	void drawSpritePlatform(uint16 platformIndex, const Point &point, const Location &location, int16 absU, int16 absV, int16 absH);
+	void drawTile(uint16 tileIndex, const Point &point, const Location *location);
+	int16 smoothSlide(int16 value, int16 min, int16 max) {
+		if (value < min) {
+			if (value < min - 100 || value > min - 4) {
+				value = min;
+			} else {
+				value += 4;
+			}
+		} else {
+			if (value > max) {
+				if (value > max + 100 || value < max + 4) {
+					value = max;
+				} else {
+					value -= 4;
+				}
+			}
+		}
+		return value;
+	}
+	int16 findMulti(int16 tileIndex, int16 absU, int16 absV, int16 absH);
+	void pushPoint(int16 u, int16 v, uint16 cost, uint16 direction);
+	void pushDragonPoint(int16 u, int16 v, uint16 direction);
+	bool checkDragonPoint(int16 u, int16 v, uint16 direction);
+	void testPossibleDirections(int16 u, int16 v, uint16 terraComp[8], int skipCenter);
+	IsoTileData *getTile(int16 u, int16 v, int16 z);
+
+
+	ByteArray _tileData;
+	Common::Array<IsoTileData> _tilesTable;
+
+	Common::Array<TilePlatformData> _tilePlatformList;
+	Common::Array<MetaTileData> _metaTileList;
+
+	Common::Array<MultiTileEntryData> _multiTable;
+	Common::Array<int16> _multiTableData;
+
+	TileMapData _tileMap;
+
+	Point _mapPosition;
+
+// path finding stuff
+	uint16 _platformHeight;
+
+	struct DragonPathCell {
+		uint8 visited:1,direction:3;
+	};
+	struct DragonTilePoint {
+		int8 u, v;
+		uint8 direction:4;
+	};
+	struct PathCell {
+		uint16 visited:1,direction:3,cost:12;
+	};
+
+public:
+	struct TilePoint {
+		int8 u, v;
+		uint16 direction:4,cost:12;
+	};
+
+private:
+	struct DragonSearchArray {
+		DragonPathCell cell[SAGA_DRAGON_SEARCH_DIAMETER][SAGA_DRAGON_SEARCH_DIAMETER];
+		DragonTilePoint queue[SAGA_SEARCH_QUEUE_SIZE];
+		DragonTilePoint *getQueue(uint16 i) {
+			assert(i < SAGA_SEARCH_QUEUE_SIZE);
+			return &queue[i];
+		}
+		DragonPathCell *getPathCell(uint16 u, uint16 v) {
+			assert((u < SAGA_DRAGON_SEARCH_DIAMETER) && (v < SAGA_DRAGON_SEARCH_DIAMETER));
+			return &cell[u][v];
+		}
+	};
+	struct SearchArray {
+		PathCell cell[SAGA_SEARCH_DIAMETER][SAGA_SEARCH_DIAMETER];
+		TilePoint queue[SAGA_SEARCH_QUEUE_SIZE];
+		TilePoint *getQueue(uint16 i) {
+			assert(i < SAGA_SEARCH_QUEUE_SIZE);
+			return &queue[i];
+		}
+		PathCell *getPathCell(uint16 u, uint16 v) {
+			assert((u < SAGA_SEARCH_DIAMETER) && (v < SAGA_SEARCH_DIAMETER));
+			return &cell[u][v];
+		}
+	};
+
+	int16 _queueCount;
+	int16 _readCount;
+	SearchArray _searchArray;
+	DragonSearchArray _dragonSearchArray;
+	byte _pathDirections[SAGA_MAX_PATH_DIRECTIONS];
+
+
+	int _viewDiff;
+	Point _viewScroll;
+	Rect _tileClip;
+
+	SagaEngine *_vm;
+};
+
+} // End of namespace Saga
+
+#endif