Initial commit

engines/stark/movement/followpath.cpp

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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/>.
+ *
+ */
+
+#include "engines/stark/movement/followpath.h"
+
+#include "engines/stark/services/global.h"
+#include "engines/stark/services/services.h"
+#include "engines/stark/services/stateprovider.h"
+
+#include "engines/stark/resources/anim.h"
+#include "engines/stark/resources/floor.h"
+#include "engines/stark/resources/item.h"
+#include "engines/stark/resources/path.h"
+
+namespace Stark {
+
+FollowPath::FollowPath(Resources::ItemVisual *item) :
+		Movement(item),
+		_path(nullptr),
+		_speed(0.0),
+		_position(0.0),
+		_previouslyEnabled(true),
+		_anim(nullptr) {
+}
+
+FollowPath::~FollowPath() {
+}
+
+void FollowPath::start() {
+	Movement::start();
+
+	_previouslyEnabled = _item->isEnabled();
+	_item->setEnabled(true);
+
+	updateItemPosition(0, 0);
+	changeItemAnim();
+}
+
+void FollowPath::stop(bool force) {
+	Movement::stop(force);
+
+	changeItemAnim();
+	_item->setEnabled(_previouslyEnabled);
+}
+
+void FollowPath::onGameLoop() {
+	// Compute the new position on the path
+	_position += _speed * StarkGlobal->getMillisecondsPerGameloop();
+
+	// Find the current path edge, and position on the path edge
+	uint currentEdge = 0;
+	float positionInEdge = _position;
+	for (uint i = 0; i < _path->getEdgeCount(); i++) {
+		float edgeLength = _path->getWeightedEdgeLength(i);
+		if (positionInEdge < edgeLength) {
+			break; // Found the current path edge
+		}
+
+		positionInEdge -= edgeLength;
+		currentEdge++;
+	}
+
+	// Check if we went beyond the path's end
+	if (currentEdge >= _path->getEdgeCount()) {
+		stop();
+		return;
+	}
+
+	updateItemPosition(currentEdge, positionInEdge);
+}
+
+void FollowPath::updateItemPosition(uint currentEdge, float positionInEdge) const {// Get the new position for the item
+	Math::Vector3d newPosition = _path->getWeightedPositionInEdge(currentEdge, positionInEdge);
+
+	// Update the item's properties in the scene
+	if (is3D()) {
+		Resources::FloorPositionedItem *item3D = Resources::Object::cast<Resources::FloorPositionedItem>(_item);
+		Resources::Floor *floor = StarkGlobal->getCurrent()->getFloor();
+
+		int32 floorFaceIndex = floor->findFaceContainingPoint(newPosition);
+		if (floorFaceIndex >= 0) {
+			item3D->setFloorFaceIndex(floorFaceIndex);
+		} else {
+			item3D->overrideSortKey(_path->getSortKey());
+		}
+
+		item3D->setPosition3D(newPosition);
+
+		Math::Vector3d direction = _path->getEdgeDirection(currentEdge);
+		item3D->setDirection(computeAngleBetweenVectorsXYPlane(direction, Math::Vector3d(1.0, 0.0, 0.0)));
+	} else {
+		Common::Point position2D = Common::Point(newPosition.x(), newPosition.y());
+		_item->setPosition2D(position2D);
+	}
+}
+
+void FollowPath::changeItemAnim() {
+	if (_ended) {
+		if (_anim) {
+			_item->resetActionAnim();
+		} else {
+			_item->setAnimActivity(Resources::Anim::kActorActivityIdle);
+		}
+	} else {
+		if (_anim) {
+			_item->playActionAnim(_anim);
+		} else {
+			_item->setAnimActivity(Resources::Anim::kActorActivityWalk);
+		}
+	}
+}
+
+void FollowPath::setPath(Resources::Path *path) {
+	_path = path;
+}
+
+void FollowPath::setSpeed(float speed) {
+	_speed = speed;
+}
+
+bool FollowPath::is3D() const {
+	return _path->getSubType() == Resources::Path::kPath3D;
+}
+
+void FollowPath::setAnim(Resources::Anim *anim) {
+	_anim = anim;
+}
+
+uint32 FollowPath::getType() const {
+	return kTypeFollowPath;
+}
+
+void FollowPath::saveLoad(ResourceSerializer *serializer) {
+	serializer->syncAsResourceReference(&_path);
+	serializer->syncAsResourceReference(&_anim);
+	serializer->syncAsFloat(_position);
+	serializer->syncAsFloat(_speed);
+	serializer->syncAsUint32LE(_previouslyEnabled);
+}
+
+} // End of namespace Stark