Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/opengl2/draw_rectangular_marquee.cpp

@@ -0,0 +1,62 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can
+// obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#include "draw_rectangular_marquee.h"
+#include "gl.h"
+#include "glu.h"
+#include "../material_colors.h"
+
+IGL_INLINE void igl::opengl2::draw_rectangular_marquee(
+  const int from_x,
+  const int from_y,
+  const int to_x,
+  const int to_y)
+{
+  using namespace std;
+  int l;
+  glGetIntegerv(GL_LIGHTING,&l);
+  int s;
+  glGetIntegerv(GL_LINE_STIPPLE,&s);
+  double lw;
+  glGetDoublev(GL_LINE_WIDTH,&lw);
+  glDisable(GL_LIGHTING);
+  // Screen space for this viewport
+  GLint viewport[4];
+  glGetIntegerv(GL_VIEWPORT,viewport);
+  const int width = viewport[2];
+  const int height = viewport[3];
+  glMatrixMode(GL_PROJECTION);
+  glPushMatrix();
+  glLoadIdentity();
+  gluOrtho2D(0,width,0,height);
+  glMatrixMode(GL_MODELVIEW);
+  glPushMatrix();
+  glLoadIdentity();
+
+  glEnable(GL_LINE_STIPPLE);
+  glLineStipple(3,0xAAAA);
+  glLineWidth(1);
+  glColor4f(0.2,0.2,0.2,1);
+  glBegin(GL_LINE_STRIP);
+  glVertex2d(from_x,from_y);
+  glVertex2d(to_x,from_y);
+  glVertex2d(to_x,to_y);
+  glVertex2d(from_x,to_y);
+  glVertex2d(from_x,from_y);
+  glEnd();
+
+  glPopMatrix();
+  glMatrixMode(GL_PROJECTION);
+  glPopMatrix();
+  glMatrixMode(GL_MODELVIEW);
+  glLineWidth(lw);
+  (s ? glEnable(GL_LINE_STIPPLE):glDisable(GL_LINE_STIPPLE));
+  (l ? glEnable(GL_LIGHTING):glDisable(GL_LIGHTING));
+}
+