Initial commit

engines/stark/movement/followpathlight.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/followpathlight.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/light.h"
+#include "engines/stark/resources/path.h"
+
+namespace Stark {
+
+FollowPathLight::FollowPathLight(Resources::ItemVisual *item) :
+		Movement(item),
+		_light(nullptr),
+		_path(nullptr),
+		_speed(0.0),
+		_position(0.0),
+		_previouslyEnabled(true) {
+}
+
+FollowPathLight::~FollowPathLight() {
+}
+
+void FollowPathLight::start() {
+	Movement::start();
+
+	_previouslyEnabled = _item->isEnabled();
+	_item->setEnabled(true);
+
+	Math::Vector3d newPosition = _path->getWeightedPositionInEdge(0, 0);
+	_light->setPosition(newPosition);
+}
+
+void FollowPathLight::stop(bool force) {
+	Movement::stop(force);
+
+	_item->setEnabled(_previouslyEnabled);
+}
+
+void FollowPathLight::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;
+	}
+
+	// Set the new position for the light
+	Math::Vector3d newPosition = _path->getWeightedPositionInEdge(currentEdge, positionInEdge);
+	_light->setPosition(newPosition);
+}
+
+void FollowPathLight::setPath(Resources::Path *path) {
+	_path = path;
+}
+
+void FollowPathLight::setSpeed(float speed) {
+	_speed = speed;
+}
+
+void FollowPathLight::setLight(Resources::Light *light) {
+	_light = light;
+}
+
+uint32 FollowPathLight::getType() const {
+	return kTypeFollowPathLight;
+}
+
+void FollowPathLight::saveLoad(ResourceSerializer *serializer) {
+	serializer->syncAsResourceReference(&_path);
+	serializer->syncAsResourceReference(&_light);
+	serializer->syncAsFloat(_position);
+	serializer->syncAsFloat(_speed);
+	serializer->syncAsUint32LE(_previouslyEnabled);
+}
+
+} // End of namespace Stark