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engines/pegasus/neighborhood/mars/shuttleweapon.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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 "pegasus/neighborhood/mars/constants.h"
+#include "pegasus/neighborhood/mars/robotship.h"
+#include "pegasus/neighborhood/mars/shuttleweapon.h"
+#include "pegasus/neighborhood/mars/spacejunk.h"
+
+namespace Pegasus {
+
+ShuttleWeapon::ShuttleWeapon() : IdlerAnimation(kNoDisplayElement) {
+	setScale(kShuttleWeaponScale);
+	_weaponDuration = kShuttleWeaponScale * 2;
+	setSegment(0, _weaponDuration);
+	setBounds(kShuttleWindowLeft, kShuttleWindowTop, kShuttleWindowLeft + kShuttleWindowWidth,
+			kShuttleWindowTop + kShuttleWindowHeight);
+	setDisplayOrder(kShuttleWeaponFrontOrder);
+}
+
+void ShuttleWeapon::initShuttleWeapon() {
+	startDisplaying();
+}
+
+void ShuttleWeapon::cleanUpShuttleWeapon() {
+	stop();
+	hide();
+	stopDisplaying();
+}
+
+bool ShuttleWeapon::canFireWeapon() {
+	return !isRunning();
+}
+
+void ShuttleWeapon::fireWeapon(const CoordType hStop, const CoordType vStop) {
+	if (!isRunning()) {
+		stop();
+		setTime(0);
+		show();
+
+		Common::Point pt2D(hStop, vStop);
+		project2DTo3D(pt2D, kShuttleDistance, _weaponTarget);
+		_weaponTime = 0;
+		setDisplayOrder(kShuttleWeaponFrontOrder);
+		start();
+	}
+}
+
+void ShuttleWeapon::updateWeaponPosition() {
+	_weaponTime = (float)_lastTime / _weaponDuration;
+	linearInterp(_weaponOrigin, _weaponTarget, _weaponTime, _weaponLocation);
+
+	if (_weaponTime == 1.0) {
+		stop();
+		hide();
+	} else {
+		triggerRedraw();
+	}
+}
+
+void ShuttleWeapon::timeChanged(const TimeValue) {
+	updateWeaponPosition();
+
+	bool hit = false;
+	Common::Point impactPoint;
+
+	if (g_spaceJunk->isJunkFlying()) {
+		hit = collisionWithJunk(impactPoint);
+		if (hit) {
+			stop();
+			hide();
+			hitJunk(impactPoint);
+		}
+	}
+
+	if (!hit && _weaponTime == 1.0 && collisionWithShuttle(impactPoint))
+		hitShuttle(impactPoint);
+}
+
+bool ShuttleWeapon::collisionWithJunk(Common::Point &impactPoint) {
+	if (getDisplayOrder() == kShuttleWeaponFrontOrder) {
+		Point3D junkPosition;
+		g_spaceJunk->getJunkPosition(junkPosition);
+
+		if (junkPosition.z < _weaponLocation.z) {
+			setDisplayOrder(kShuttleWeaponBackOrder);
+			project3DTo2D(_weaponLocation, impactPoint);
+			return g_spaceJunk->pointInJunk(impactPoint);
+		}
+	}
+
+	return false;
+}
+
+bool ShuttleWeapon::collisionWithShuttle(Common::Point &impactPoint) {
+	project3DTo2D(_weaponLocation, impactPoint);
+	return g_robotShip->pointInShuttle(impactPoint);
+}
+
+void ShuttleWeapon::hitJunk(Common::Point impactPoint) {
+	g_spaceJunk->hitByEnergyBeam(impactPoint);
+}
+
+void ShuttleWeapon::hitShuttle(Common::Point impactPoint) {
+	g_robotShip->hitByEnergyBeam(impactPoint);
+}
+
+} // End of namespace Pegasus