1 files changed, 267 insertions, 0 deletions
diff --git a/engines/saga/objectmap.cpp b/engines/saga/objectmap.cpp
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+++ b/engines/saga/objectmap.cpp
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+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2004-2006 The ScummVM project
+ *
+ * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+// Object map / Object click-area module
+
+// Polygon Hit Test code ( HitTestPoly() ) adapted from code (C) Eric Haines
+// appearing in Graphics Gems IV, "Point in Polygon Strategies."
+// p. 24-46, code: p. 34-45
+#include "saga/saga.h"
+
+#include "saga/gfx.h"
+#include "saga/console.h"
+#include "saga/font.h"
+#include "saga/interface.h"
+#include "saga/objectmap.h"
+#include "saga/stream.h"
+#include "saga/actor.h"
+#include "saga/scene.h"
+#include "saga/isomap.h"
+
+namespace Saga {
+
+HitZone::HitZone(MemoryReadStreamEndian *readStream, int index): _index(index) {
+	int i, j;
+	HitZone::ClickArea *clickArea;
+	Point *point;
+
+	_flags = readStream->readByte();
+	_clickAreasCount = readStream->readByte();
+	_rightButtonVerb = readStream->readByte();
+	readStream->readByte(); // pad
+	_nameIndex = readStream->readUint16();
+	_scriptNumber = readStream->readUint16();
+
+	_clickAreas = (HitZone::ClickArea *)malloc(_clickAreasCount * sizeof(*_clickAreas));
+
+	if (_clickAreas == NULL) {
+		memoryError("HitZone::HitZone");
+	}
+
+	for (i = 0; i < _clickAreasCount; i++) {
+		clickArea = &_clickAreas[i];
+		clickArea->pointsCount = readStream->readUint16LE();
+
+		assert(clickArea->pointsCount);
+
+		clickArea->points = (Point *)malloc(clickArea->pointsCount * sizeof(*(clickArea->points)));
+		if (clickArea->points == NULL) {
+			memoryError("HitZone::HitZone");
+		}
+
+		for (j = 0; j < clickArea->pointsCount; j++) {
+			point = &clickArea->points[j];
+			point->x = readStream->readSint16();
+			point->y = readStream->readSint16();
+		}
+	}
+}
+
+HitZone::~HitZone() {
+	for (int i = 0; i < _clickAreasCount; i++) {
+		free(_clickAreas[i].points);
+	}
+	free(_clickAreas);
+}
+
+bool HitZone::getSpecialPoint(Point &specialPoint) const {
+	int i, pointsCount;
+	HitZone::ClickArea *clickArea;
+	Point *points;
+
+	for (i = 0; i < _clickAreasCount; i++) {
+		clickArea = &_clickAreas[i];
+		pointsCount = clickArea->pointsCount;
+		points = clickArea->points;
+		if (pointsCount == 1) {
+			specialPoint = points[0];
+			return true;
+		}
+	}
+	return false;
+}
+bool HitZone::hitTest(const Point &testPoint) {
+	int i, pointsCount;
+	HitZone::ClickArea *clickArea;
+	Point *points;
+
+	if (_flags & kHitZoneEnabled) {
+		for (i = 0; i < _clickAreasCount; i++) {
+			clickArea = &_clickAreas[i];
+			pointsCount = clickArea->pointsCount;
+			points = clickArea->points;
+
+			if (pointsCount == 2) {
+				// Hit-test a box region
+				if ((testPoint.x >= points[0].x) &&
+					(testPoint.x <= points[1].x) &&
+					(testPoint.y >= points[0].y) &&
+					(testPoint.y <= points[1].y)) {
+						return true;
+					}
+			} else {
+				if (pointsCount > 2) {
+					// Hit-test a polygon
+					if (hitTestPoly(points, pointsCount, testPoint)) {
+						return true;
+					}
+				}
+			}
+		}
+	}
+	return false;
+}
+
+void HitZone::draw(SagaEngine *vm, Surface *ds, int color) {
+	int i, pointsCount, j;
+	Location location;
+	HitZone::ClickArea *clickArea;
+	Point *points;
+	for (i = 0; i < _clickAreasCount; i++) {
+		clickArea = &_clickAreas[i];
+		pointsCount = clickArea->pointsCount;
+		if (vm->_scene->getFlags() & kSceneFlagISO) {
+			points = (Point*)malloc(sizeof(Point) * pointsCount);
+			for (j = 0; j < pointsCount; j++) {
+				location.u() = clickArea->points[j].x;
+				location.v() = clickArea->points[j].y;
+				location.z = 0;
+				vm->_isoMap->tileCoordsToScreenPoint(location, points[j]);
+			}
+		} else {
+			points = clickArea->points;
+		}
+
+		if (pointsCount == 2) {
+			// 2 points represent a box
+			ds->drawFrame(points[0], points[1], color);
+		} else {
+			if (pointsCount > 2) {
+				// Otherwise draw a polyline
+				ds->drawPolyLine(points, pointsCount, color);
+			}
+		}
+		if (vm->_scene->getFlags() & kSceneFlagISO) {
+			free(points);
+		}
+
+	}
+}
+
+
+// Loads an object map resource ( objects ( clickareas ( points ) ) )
+void ObjectMap::load(const byte *resourcePointer, size_t resourceLength) {
+	int i;
+
+	if (resourceLength == 0) {
+		return;
+	}
+
+	if (resourceLength < 4) {
+		error("ObjectMap::load wrong resourceLength");
+	}
+
+	MemoryReadStreamEndian readS(resourcePointer, resourceLength, _vm->isBigEndian());
+
+	_hitZoneListCount = readS.readSint16();
+	if (_hitZoneListCount < 0) {
+		error("ObjectMap::load _hitZoneListCount < 0");
+	}
+
+	if (_hitZoneList)
+		error("ObjectMap::load _hitZoneList != NULL");
+
+	_hitZoneList = (HitZone **) malloc(_hitZoneListCount * sizeof(HitZone *));
+	if (_hitZoneList == NULL) {
+		memoryError("ObjectMap::load");
+	}
+
+	for (i = 0; i < _hitZoneListCount; i++) {
+		_hitZoneList[i] = new HitZone(&readS, i);
+	}
+}
+
+void ObjectMap::freeMem() {
+	int i;
+
+	if (_hitZoneList) {
+		for (i = 0; i < _hitZoneListCount; i++) {
+			delete _hitZoneList[i];
+		}
+
+		free(_hitZoneList);
+		_hitZoneList = NULL;
+	}
+	_hitZoneListCount = 0;
+}
+
+
+
+void ObjectMap::draw(Surface *ds, const Point& testPoint, int color, int color2) {
+	int i;
+	int hitZoneIndex;
+	char txtBuf[32];
+	Point pickPoint;
+	Point textPoint;
+	Location pickLocation;
+	pickPoint = testPoint;
+	if (_vm->_scene->getFlags() & kSceneFlagISO) {
+		assert(_vm->_actor->_protagonist);
+		pickPoint.y -= _vm->_actor->_protagonist->_location.z;
+		_vm->_isoMap->screenPointToTileCoords(pickPoint, pickLocation);
+		pickLocation.toScreenPointUV(pickPoint);
+	}
+
+	hitZoneIndex = hitTest(pickPoint);
+
+	for (i = 0; i < _hitZoneListCount; i++) {
+		_hitZoneList[i]->draw(_vm, ds, (hitZoneIndex == i) ? color2 : color);
+	}
+
+	if (hitZoneIndex != -1) {
+		snprintf(txtBuf, sizeof(txtBuf), "hitZone %d", hitZoneIndex);
+		textPoint.x = 2;
+		textPoint.y = 2;
+		_vm->_font->textDraw(kKnownFontSmall, ds, txtBuf, textPoint, kITEColorBrightWhite, kITEColorBlack, kFontOutline);
+	}
+}
+
+int ObjectMap::hitTest(const Point& testPoint) {
+	int i;
+
+	// Loop through all scene objects
+	for (i = 0; i < _hitZoneListCount; i++) {
+		if (_hitZoneList[i]->hitTest(testPoint)) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+void ObjectMap::cmdInfo(void) {
+	_vm->_console->DebugPrintf("%d zone(s) loaded.\n\n", _hitZoneListCount);
+}
+
+} // End of namespace Saga