code cleanup:

- move lasso functions into BLI (were in 3D view but UV editor needs access)
- remove unused UV functions (ones that assumed 3-4 sized UVs only)

1 files changed, 129 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/lasso.c b/source/blender/blenlib/intern/lasso.c
new file mode 100644
index 00000000000..29b967fcd37
--- /dev/null
+++ b/source/blender/blenlib/intern/lasso.c
@@ -0,0 +1,129 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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 2
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ *
+ */
+
+/** \file blender/blenlib/intern/lasso.c
+ *  \ingroup bli
+ */
+
+#include "DNA_vec_types.h"
+
+#include "BLI_math.h"
+#include "BLI_rect.h"
+
+#include "BLI_lasso.h" /* own include */
+
+void BLI_lasso_boundbox(rcti *rect, int mcords[][2], short moves)
+{
+	short a;
+
+	rect->xmin = rect->xmax = mcords[0][0];
+	rect->ymin = rect->ymax = mcords[0][1];
+
+	for (a = 1; a < moves; a++) {
+		if      (mcords[a][0] < rect->xmin) rect->xmin = mcords[a][0];
+		else if (mcords[a][0] > rect->xmax) rect->xmax = mcords[a][0];
+		if      (mcords[a][1] < rect->ymin) rect->ymin = mcords[a][1];
+		else if (mcords[a][1] > rect->ymax) rect->ymax = mcords[a][1];
+	}
+}
+
+
+int BLI_lasso_is_point_inside(int mcords[][2], short moves,
+                              const int sx, const int sy,
+                              const int error_value)
+{
+	/* we do the angle rule, define that all added angles should be about zero or (2 * PI) */
+	float angletot = 0.0, dot, ang, cross, fp1[2], fp2[2];
+	int a;
+	int *p1, *p2;
+
+	if (sx == error_value) {
+		return 0;
+	}
+
+	p1 = mcords[moves - 1];
+	p2 = mcords[0];
+
+	/* first vector */
+	fp1[0] = (float)(p1[0] - sx);
+	fp1[1] = (float)(p1[1] - sy);
+	normalize_v2(fp1);
+
+	for (a = 0; a < moves; a++) {
+		/* second vector */
+		fp2[0] = (float)(p2[0] - sx);
+		fp2[1] = (float)(p2[1] - sy);
+		normalize_v2(fp2);
+
+		/* dot and angle and cross */
+		dot = fp1[0] * fp2[0] + fp1[1] * fp2[1];
+		ang = fabs(saacos(dot));
+
+		cross = (float)((p1[1] - p2[1]) * (p1[0] - sx) + (p2[0] - p1[0]) * (p1[1] - sy));
+
+		if (cross < 0.0f) angletot -= ang;
+		else angletot += ang;
+
+		/* circulate */
+		fp1[0] = fp2[0]; fp1[1] = fp2[1];
+		p1 = p2;
+		p2 = mcords[a + 1];
+	}
+
+	if (fabs(angletot) > 4.0) return 1;
+	return 0;
+}
+
+/* edge version for lasso select. we assume boundbox check was done */
+int BLI_lasso_is_edge_inside(int mcords[][2], short moves,
+                             int x0, int y0, int x1, int y1,
+                             const int error_value)
+{
+	int v1[2], v2[2];
+	int a;
+
+	if (x0 == error_value || x1 == error_value) {
+		return 0;
+	}
+
+	v1[0] = x0, v1[1] = y0;
+	v2[0] = x1, v2[1] = y1;
+
+	/* check points in lasso */
+	if (BLI_lasso_is_point_inside(mcords, moves, v1[0], v1[1], error_value)) return 1;
+	if (BLI_lasso_is_point_inside(mcords, moves, v2[0], v2[1], error_value)) return 1;
+
+	/* no points in lasso, so we have to intersect with lasso edge */
+
+	if (isect_line_line_v2_int(mcords[0], mcords[moves - 1], v1, v2) > 0) return 1;
+	for (a = 0; a < moves - 1; a++) {
+		if (isect_line_line_v2_int(mcords[a], mcords[a + 1], v1, v2) > 0) return 1;
+	}
+
+	return 0;
+}