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engines/ultima/ultima8/world/crosshair_process.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 "ultima/ultima8/misc/debugger.h"
+
+#include "ultima/ultima8/kernel/kernel.h"
+#include "ultima/ultima8/world/actors/main_actor.h"
+#include "ultima/ultima8/world/actors/cru_avatar_mover_process.h"
+#include "ultima/ultima8/world/crosshair_process.h"
+#include "ultima/ultima8/world/item_factory.h"
+#include "ultima/ultima8/world/get_object.h"
+#include "ultima/ultima8/ultima8.h"
+
+#include "math/utils.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+DEFINE_RUNTIME_CLASSTYPE_CODE(CrosshairProcess)
+
+static const uint32 CROSSHAIR_SHAPE = 0x4CC;
+static const float CROSSHAIR_DIST = 400.0;
+
+CrosshairProcess *CrosshairProcess::_instance = nullptr;
+
+CrosshairProcess::CrosshairProcess() : Process() {
+	_instance = this;
+	_type = 1; // persistent
+}
+
+CrosshairProcess::~CrosshairProcess() {
+	if (_instance == this)
+		_instance = nullptr;
+}
+
+void CrosshairProcess::run() {
+	Actor *actor = getControlledActor();
+	if (!actor)
+		return;
+
+	if (actor->isInCombat()) {
+		Kernel *kernel = Kernel::get_instance();
+		assert(kernel);
+		Point3 pt = actor->getLocation();
+		actor->addFireAnimOffsets(pt.x, pt.y, pt.z);
+
+		const CruAvatarMoverProcess *mover = dynamic_cast<CruAvatarMoverProcess *>(Ultima8Engine::get_instance()->getAvatarMoverProcess());
+		if (!mover) {
+			warning("lost CruAvatarMoverProcess");
+			return;
+		}
+		double angle = mover->getAvatarAngleDegrees() + 90.0;
+		if (angle < 90.0) {
+			// -1 is used to record the avatar is not in combat, so shouldn't happen?
+			return;
+		}
+		// Convert angle to 0~2pi
+		double rads = Math::deg2rad(angle);
+		float xoff = CROSSHAIR_DIST * cos(rads);
+		float yoff = CROSSHAIR_DIST * sin(rads);
+		pt.x -= static_cast<int32>(xoff);
+		pt.y -= static_cast<int32>(yoff);
+
+		Item *item;
+		if (_itemNum) {
+			item = getItem(_itemNum);
+		} else {
+			// Create a new sprite
+			item = ItemFactory::createItem(CROSSHAIR_SHAPE, 0, 0, Item::FLG_DISPOSABLE,
+										   0, 0, Item::EXT_SPRITE, true);
+			setItemNum(item->getObjId());
+		}
+		if (item)
+			item->move(pt.x, pt.y, pt.z);
+		else
+			_itemNum = 0; // sprite gone? can happen during teleport.
+	} else {
+		if (_itemNum) {
+			Item *item = getItem(_itemNum);
+			if (item)
+				item->destroy();
+			_itemNum = 0;
+		}
+	}
+}
+
+void CrosshairProcess::saveData(Common::WriteStream *ws) {
+	Process::saveData(ws);
+}
+
+bool CrosshairProcess::loadData(Common::ReadStream *rs, uint32 version) {
+	if (!Process::loadData(rs, version)) return false;
+	_type = 1; // should be persistent but older savegames may not know that.
+	return true;
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima