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engines/titanic/star_control/star_markers.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 "titanic/star_control/star_markers.h"
+#include "titanic/star_control/camera.h"
+#include "titanic/star_control/surface_area.h"
+
+namespace Titanic {
+
+void CStarMarkers::draw(CSurfaceArea *surfaceArea, CCamera *camera, CStarCloseup *closeup) {
+	if (_data.empty())
+		return;
+
+	FPose pose = camera->getPose();
+	double threshold = camera->getFrontClip();
+	FPoint center((double)surfaceArea->_width * 0.5,
+		surfaceArea->_height * 0.5);
+	FVector newV;
+	double xl, xc, xr, yt, yc, yb;
+
+	uint savedPixel = surfaceArea->_pixel;
+	surfaceArea->_pixel = 0xffff;
+	surfaceArea->setColorFromPixel();
+
+	for (uint idx = 0; idx < _data.size(); ++idx) {
+		const CBaseStarEntry &star = _data[idx];
+		newV._x = pose._row1._x * star._position._x + pose._row3._x * star._position._z
+			+ pose._row2._x * star._position._y + pose._vector._x;
+		newV._y = pose._row1._y * star._position._x + pose._row3._y * star._position._z
+			+ pose._row2._y * star._position._y + pose._vector._y;
+		newV._z = pose._row1._z * star._position._x + pose._row3._z * star._position._z
+			+ pose._row2._z * star._position._y + pose._vector._z;
+
+		if (newV._z > threshold) {
+			FVector vTemp = camera->getRelativePos(2, newV);
+
+			xc = center._x + vTemp._x;
+			yc = center._y + vTemp._y;
+			xl = xc - 4.0;
+			yt = yc - 4.0;
+			xr = xc + 4.0;
+			yb = yc + 4.0;
+			surfaceArea->drawLine(FPoint(xl, yc), FPoint(xc, yb)); // bottom-left
+			surfaceArea->drawLine(FPoint(xc, yb), FPoint(xr, yc)); // bottom-right
+			surfaceArea->drawLine(FPoint(xr, yc), FPoint(xc, yt)); // top-right
+			surfaceArea->drawLine(FPoint(xc, yt), FPoint(xl, yc)); // top-left
+		}
+	}
+
+	surfaceArea->_pixel = savedPixel;
+	surfaceArea->setColorFromPixel();
+}
+
+bool CStarMarkers::addStar(const CBaseStarEntry *entry) {
+	// iterate through the existing stars
+	for (uint idx = 0; idx < _data.size(); ++idx) {
+		CBaseStarEntry &star = _data[idx];
+		if (star == *entry) {
+			// Found a matching star at the exact same position, so remove it instead
+			_data.remove_at(idx);
+			return true;
+		}
+	}
+
+	// No existing match
+	if (_data.size() == 32)
+		// Out of space, so delete oldest star
+		_data.remove_at(0);
+
+	// Add new star
+	_data.push_back(*entry);
+	return true;
+}
+
+} // End of namespace Titanic