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engines/pegasus/neighborhood/mars/energybeam.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/energybeam.h"
+
+namespace Pegasus {
+
+static const TimeValue kEnergyBeamTime = kOneSecond * kShuttleWeaponScale / 2;
+
+static const CoordType kEnergyBeamOriginH = kShuttleWindowMidH;
+static const CoordType kEnergyBeamOriginV = kShuttleWindowTop + kShuttleWindowHeight;
+
+static const float kBeamXOrigin = convertScreenHToSpaceX(kEnergyBeamOriginH, kEnergyBeamMinDistance);
+static const float kBeamYOrigin = convertScreenVToSpaceY(kEnergyBeamOriginV, kEnergyBeamMinDistance);
+static const float kBeamZOrigin = kEnergyBeamMinDistance;
+
+EnergyBeam::EnergyBeam() {
+	_weaponDuration = kEnergyBeamTime;
+	setSegment(0, kEnergyBeamTime);
+	_weaponOrigin = Point3D(kBeamXOrigin, kBeamYOrigin, kBeamZOrigin);
+}
+
+void EnergyBeam::draw(const Common::Rect &) {
+	static const int kBeamColorRed1 = 224;
+	static const int kBeamColorRed2 = 64;
+
+	Graphics::Surface *surface = g_vm->_gfx->getWorkArea();
+
+	byte red = linearInterp(0, kEnergyBeamTime, _lastTime, kBeamColorRed1, kBeamColorRed2);
+	uint32 color = surface->format.RGBToColor(red, 0, 0);
+
+	Point3D startPoint;
+	if (_weaponTime < 0.1)
+		startPoint = _weaponOrigin;
+	else
+		linearInterp(_weaponOrigin, _weaponTarget, _weaponTime - 0.1, startPoint);
+
+	Common::Point lineStart;
+	project3DTo2D(startPoint, lineStart);
+
+	Common::Point lineEnd;
+	project3DTo2D(_weaponLocation, lineEnd);
+
+	surface->drawThickLine(lineStart.x, lineStart.y, lineEnd.x, lineEnd.y, 2, 1, color);
+}
+
+} // End of namespace Pegasus