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engines/pegasus/neighborhood/mars/spacejunk.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/pegasus.h"
+#include "pegasus/neighborhood/mars/mars.h"
+#include "pegasus/neighborhood/mars/spacejunk.h"
+
+namespace Pegasus {
+
+static const CoordType kMaxBounceSize = 90;
+static const CoordType kBounceTargetHRange = 640 - kMaxBounceSize - 2;
+static const CoordType kBounceTargetVRange = 480 - kMaxBounceSize - 2;
+
+static const float kJunkXTarget = 0;
+static const float kJunkYTarget = 0;
+static const float kJunkZTarget = kJunkMinDistance;
+
+SpaceJunk *g_spaceJunk = nullptr;
+
+SpaceJunk::SpaceJunk(const DisplayElementID id) : ScalingMovie(id) {
+	_timer.setScale(kJunkTimeScale);
+	_bouncing = false;
+	g_spaceJunk = this;
+}
+
+SpaceJunk::~SpaceJunk() {
+	g_spaceJunk = nullptr;
+}
+
+void SpaceJunk::launchJunk(int16 whichJunk, CoordType xOrigin, CoordType yOrigin) {
+	_bouncing = false;
+	TimeValue startTime = whichJunk * 16 * 40;
+	TimeValue stopTime = startTime + 16 * 40;
+
+	_launchPoint = Point3D(convertScreenHToSpaceX(xOrigin, kJunkMaxDistance),
+			convertScreenVToSpaceY(yOrigin, kJunkMaxDistance), kJunkMaxDistance);
+	startIdling();
+	stop();
+	setFlags(0);
+	setSegment(startTime, stopTime);
+	setFlags(kLoopTimeBase);
+	setTime(startTime);
+	start();
+	show();
+	_timer.stop();
+	_timer.setSegment(0, kJunkTravelTime);
+	_timer.setTime(0);
+
+	// Force it to set up correctly from the get-go
+	useIdleTime();
+
+	_timer.start();
+}
+
+void SpaceJunk::setCenter(const CoordType centerX, const CoordType centerY) {
+	_center.x = centerX;
+	_center.y = centerY;
+
+	Common::Rect r;
+	getBounds(r);
+	r.moveTo(CLIP<int>(centerX - (r.width() >> 1), 0, 640 - r.width()), CLIP<int>(centerY - (r.height() >> 1), 0, 480 - r.height()));
+	setBounds(r);
+}
+
+void SpaceJunk::setScaleSize(const CoordType size) {
+	Common::Rect r;
+	r.left = _center.x - (size >> 1);
+	r.top = _center.y - (size >> 1);
+	r.right = r.left + size;
+	r.bottom = r.top + size;
+	setBounds(r);
+}
+
+void SpaceJunk::useIdleTime() {
+	if (_bouncing) {
+		TimeValue time = _timer.getTime();
+		Common::Point pt;
+		pt.x = linearInterp(0, _bounceTime, time, _bounceStart.x, _bounceStop.x);
+		pt.y = linearInterp(0, _bounceTime, time, _bounceStart.y, _bounceStop.y);
+		CoordType size = linearInterp(0, _bounceTime, time, _bounceSizeStart, _bounceSizeStop);
+		setCenter(pt.x, pt.y);
+		setScaleSize(size);
+
+		if (time == _bounceTime) {
+			stop();
+			stopIdling();
+			hide();
+			((Mars *)g_neighborhood)->setUpNextDropTime();
+		}
+	} else {
+		float t = (float)_timer.getTime() / kJunkTravelTime;
+		linearInterp(_launchPoint, kJunkXTarget, kJunkYTarget, kJunkZTarget, t, _junkPosition);
+
+		Common::Point pt2D;
+		project3DTo2D(_junkPosition, pt2D);
+		setCenter(pt2D.x, pt2D.y);
+		setScaleSize((int)(convertSpaceYToScreenV(_junkPosition.y - kJunkSize / 2, _junkPosition.z) -
+				convertSpaceYToScreenV(_junkPosition.y + kJunkSize / 2, _junkPosition.z)));
+
+		if (t == 1.0) {
+			rebound(kCollisionReboundTime);
+			((Mars *)g_neighborhood)->hitByJunk();
+		}
+	}
+}
+
+bool SpaceJunk::pointInJunk(const Common::Point &pt) {
+	Common::Rect r;
+	getBounds(r);
+
+	int dx = r.width() / 4;
+	int dy = r.height() / 4;
+
+	r.left += dx;
+	r.right -= dx;
+	r.top += dy;
+	r.top -= dy;
+
+	return r.contains(pt);
+}
+
+void SpaceJunk::rebound(const TimeValue reboundTime) {
+	Common::Rect bounds;
+	getBounds(bounds);
+
+	_bounceStart.x = (bounds.left + bounds.right) >> 1;
+	_bounceStart.y = (bounds.top + bounds.bottom) >> 1;
+
+	switch (g_vm->getRandomNumber(3)) {
+	case 0:
+		_bounceStop.x = kMaxBounceSize / 2 + 1 + g_vm->getRandomNumber(kBounceTargetHRange - 1);
+		_bounceStop.y = kMaxBounceSize / 2 + 1;
+		break;
+	case 1:
+		_bounceStop.x = kMaxBounceSize / 2 + 1 + g_vm->getRandomNumber(kBounceTargetHRange - 1);
+		_bounceStop.y = 480 - kMaxBounceSize / 2 + 1;
+		break;
+	case 2:
+		_bounceStop.x = kMaxBounceSize / 2 + 1;
+		_bounceStop.y = kMaxBounceSize / 2 + 1 + g_vm->getRandomNumber(kBounceTargetVRange - 1);
+		break;
+	case 3:
+		_bounceStop.x = 640 - kMaxBounceSize / 2 + 1;
+		_bounceStop.y = kMaxBounceSize / 2 + 1 + g_vm->getRandomNumber(kBounceTargetVRange - 1);
+		break;
+	default:
+		break;
+	}
+
+	_bounceSizeStart = bounds.width();
+	_bounceSizeStop = MIN(_bounceSizeStart, kMaxBounceSize);
+
+	_timer.stop();
+	_timer.setSegment(0, reboundTime);
+	_bounceTime = reboundTime;
+	_timer.setTime(0);
+	_timer.start();
+
+	_bouncing = true;
+}
+
+void SpaceJunk::hitByEnergyBeam(Common::Point) {
+	rebound(kWeaponReboundTime);
+	setGlowing(true);
+	g_vm->delayShell(1, 3);
+	setGlowing(false);
+}
+
+void SpaceJunk::hitByGravitonCannon(Common::Point impactPoint) {
+	stop();
+	stopIdling();
+	hide();
+
+	Common::Rect r;
+	getBounds(r);
+	r = Common::Rect::center(impactPoint.x, impactPoint.y, r.width(), r.height());
+
+	((Mars *)g_neighborhood)->showBigExplosion(r, kShuttleJunkOrder);
+	((Mars *)g_neighborhood)->setUpNextDropTime();
+}
+
+void SpaceJunk::getJunkPosition(Point3D &position) {
+	position = _junkPosition;
+}
+
+bool SpaceJunk::isJunkFlying() {
+	return isIdling();
+}
+
+} // End of namespace Pegasus