diff -r 09150d027e8c -r d79083b9f74d src/miscallenous.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/miscallenous.cc	Sat Mar 29 05:38:03 2014 +0200
@@ -0,0 +1,303 @@
+/*
+ *  LDForge: LDraw parts authoring CAD
+ *  Copyright (C) 2013, 2014 Santeri Piippo
+ *
+ *  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 <math.h>
+#include <locale.h>
+#include <QColor>
+#include "main.h"
+#include "miscallenous.h"
+#include "mainWindow.h"
+#include "dialogs.h"
+#include "ldDocument.h"
+#include "ui_rotpoint.h"
+#include "misc/documentPointer.cc"
+#include "misc/ringFinder.cc"
+#include "misc/invokeLater.cc"
+
+// Prime number table.
+const int g_primes[NUM_PRIMES] =
+{
+	2,    3,    5,    7,    11,   13,   17,   19,   23,   29,
+	31,   37,   41,   43,   47,   53,   59,   61,   67,   71,
+	73,   79,   83,   89,   97,   101,  103,  107,  109,  113,
+	127,  131,  137,  139,  149,  151,  157,  163,  167,  173,
+	179,  181,  191,  193,  197,  199,  211,  223,  227,  229,
+	233,  239,  241,  251,  257,  263,  269,  271,  277,  281,
+	283,  293,  307,  311,  313,  317,  331,  337,  347,  349,
+	353,  359,  367,  373,  379,  383,  389,  397,  401,  409,
+	419,  421,  431,  433,  439,  443,  449,  457,  461,  463,
+	467,  479,  487,  491,  499,  503,  509,  521,  523,  541,
+	547,  557,  563,  569,  571,  577,  587,  593,  599,  601,
+	607,  613,  617,  619,  631,  641,  643,  647,  653,  659,
+	661,  673,  677,  683,  691,  701,  709,  719,  727,  733,
+	739,  743,  751,  757,  761,  769,  773,  787,  797,  809,
+	811,  821,  823,  827,  829,  839,  853,  857,  859,  863,
+	877,  881,  883,  887,  907,  911,  919,  929,  937,  941,
+	947,  953,  967,  971,  977,  983,  991,  997, 1009, 1013,
+	1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069,
+	1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151,
+	1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223,
+	1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291,
+	1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373,
+	1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451,
+	1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511,
+	1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583,
+	1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657,
+	1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733,
+	1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811,
+	1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889,
+	1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987,
+	1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053,
+	2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129,
+	2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213,
+	2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287,
+	2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357,
+	2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423,
+	2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531,
+	2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617,
+	2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687,
+	2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741,
+	2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819,
+	2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903,
+	2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999,
+	3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079,
+	3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181,
+	3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257,
+	3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331,
+	3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413,
+	3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511,
+	3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571,
+};
+
+static const long g_e10[] =
+{
+	1l,
+	10l,
+	100l,
+	1000l,
+	10000l,
+	100000l,
+	1000000l,
+	10000000l,
+	100000000l,
+	1000000000l,
+};
+
+// =============================================================================
+//
+// Grid stuff
+//
+cfg (Int,		grid,					Grid::Medium);
+cfg (Float,		grid_coarse_x,			5.0f);
+cfg (Float,		grid_coarse_y,			5.0f);
+cfg (Float,		grid_coarse_z,			5.0f);
+cfg (Float,		grid_coarse_angle,		45.0f);
+cfg (Float, 	grid_medium_x,			1.0f);
+cfg (Float,		grid_medium_y,			1.0f);
+cfg (Float,		grid_medium_z,			1.0f);
+cfg (Float,		grid_medium_angle,		22.5f);
+cfg (Float,		grid_fine_x,			0.1f);
+cfg (Float,		grid_fine_y,			0.1f);
+cfg (Float,		grid_fine_z,			0.1f);
+cfg (Float,		grid_fine_angle,		7.5f);
+cfg (Int,		edit_rotpoint,			0);
+cfg (Vertex,	edit_customrotpoint,	g_origin);
+
+const gridinfo g_GridInfo[3] =
+{
+	{ "Coarse", { &grid_coarse_x, &grid_coarse_y, &grid_coarse_z, &grid_coarse_angle }},
+	{ "Medium", { &grid_medium_x, &grid_medium_y, &grid_medium_z, &grid_medium_angle }},
+	{ "Fine",   { &grid_fine_x,   &grid_fine_y,   &grid_fine_z,   &grid_fine_angle   }}
+};
+
+// =============================================================================
+//
+// Snap the given coordinate value on the current grid's given axis.
+//
+double Grid::snap (double in, const Grid::Config axis)
+{
+	const double gridval = *currentGrid().confs[axis];
+	const long mult = abs (in / gridval);
+	const bool neg = (in < 0);
+	double out = mult * gridval;
+
+	if (abs<double> (in) - (mult * gridval) > gridval / 2)
+		out += gridval;
+
+	if (neg && out != 0)
+		out *= -1;
+
+	return out;
+}
+
+// =============================================================================
+//
+bool numeric (const QString& tok)
+{
+	bool gotDot = false;
+
+	for (int i = 0; i < tok.length(); ++i)
+	{
+		const QChar c = tok[i];
+
+		// Allow leading hyphen for negatives
+		if (i == 0 && c == '-')
+			continue;
+
+		// Check for decimal point
+		if (!gotDot && c == '.')
+		{
+			gotDot = true;
+			continue;
+		}
+
+		if (c >= '0' && c <= '9')
+			continue; // Digit
+
+		// If the above cases didn't catch this character, it was
+		// illegal and this is therefore not a number.
+		return false;
+	}
+
+	return true;
+}
+
+// =============================================================================
+//
+void simplify (int& numer, int& denom)
+{
+	bool repeat;
+
+	do
+	{
+		repeat = false;
+
+		for (int x = 0; x < NUM_PRIMES; x++)
+		{
+			const int prime = g_primes[NUM_PRIMES - x - 1];
+
+			if (numer <= prime || denom <= prime)
+				continue;
+
+			if ((numer % prime == 0) && (denom % prime == 0))
+			{
+				numer /= prime;
+				denom /= prime;
+				repeat = true;
+				break;
+			}
+		}
+	}
+	while (repeat);
+}
+
+// =============================================================================
+//
+Vertex rotPoint (const LDObjectList& objs)
+{
+	switch ((ERotationPoint) edit_rotpoint)
+	{
+		case EObjectOrigin:
+		{
+			LDBoundingBox box;
+
+			// Calculate center vertex
+			for (LDObject* obj : objs)
+			{
+				if (obj->hasMatrix())
+					box << dynamic_cast<LDMatrixObject*> (obj)->position();
+				else
+					box << obj;
+			}
+
+			return box.center();
+		}
+
+		case EWorldOrigin:
+		{
+			return g_origin;
+		}
+
+		case ECustomPoint:
+		{
+			return edit_customrotpoint;
+		}
+	}
+
+	return Vertex();
+}
+
+// =============================================================================
+//
+void configRotationPoint()
+{
+	QDialog* dlg = new QDialog;
+	Ui::RotPointUI ui;
+	ui.setupUi (dlg);
+
+	switch ((ERotationPoint) edit_rotpoint)
+	{
+		case EObjectOrigin:
+			ui.objectPoint->setChecked (true);
+			break;
+
+		case EWorldOrigin:
+			ui.worldPoint->setChecked (true);
+			break;
+
+		case ECustomPoint:
+			ui.customPoint->setChecked (true);
+			break;
+	}
+
+	ui.customX->setValue (edit_customrotpoint.x());
+	ui.customY->setValue (edit_customrotpoint.y());
+	ui.customZ->setValue (edit_customrotpoint.z());
+
+	if (!dlg->exec())
+		return;
+
+	edit_rotpoint =
+		(ui.objectPoint->isChecked()) ? EObjectOrigin :
+		(ui.worldPoint->isChecked())  ? EWorldOrigin :
+		ECustomPoint;
+
+	edit_customrotpoint.x() = ui.customX->value();
+	edit_customrotpoint.y() = ui.customY->value();
+	edit_customrotpoint.z() = ui.customZ->value();
+}
+
+// =============================================================================
+//
+QString join (QList<StringFormatArg> vals, QString delim)
+{
+	QStringList list;
+
+	for (const StringFormatArg& arg : vals)
+		list << arg.text();
+
+	return list.join (delim);
+}
+
+// =============================================================================
+//
+void roundToDecimals (double& a, int decimals)
+{
+	assert (decimals >= 0 && decimals < (signed) (sizeof g_e10 / sizeof *g_e10));
+	a = round (a * g_e10[decimals]) / g_e10[decimals];
+}