R*tree implementation based on boost::variant

[SVN r70531]

tests/additional_glut_vis.cpp

@@ -0,0 +1,70 @@
+#include <gl/glut.h>
+#define BOOST_GEOMETRY_INDEX_RTREE_ENABLE_GL_DRAW
+
+#include <boost/geometry/extensions/index/rtree/rtree.hpp>
+
+#include <boost/geometry/extensions/index/rtree/visitors/gl_draw.hpp>
+
+typedef boost::geometry::model::point<float, 2, boost::geometry::cs::cartesian> P;
+typedef boost::geometry::model::box<P> B;
+boost::geometry::index::rtree<B> t;
+
+void render_scene(void)
+{
+    boost::geometry::index::gl_draw(t);
+}
+
+void resize(int w, int h)
+{
+    if ( h == 0 )
+        h = 1;
+
+    float ratio = float(w) / h;
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+
+    glViewport(0, 0, w, h);
+
+    gluPerspective(45, ratio, 1, 1000);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    gluLookAt(
+        5.0f, 5.0f, 15.0f, 
+        5.0f, 5.0f, -1.0f,
+        0.0f, 1.0f, 0.0f);
+}
+
+void mouse(int button, int state, int x, int y)
+{
+    if ( state == GLUT_DOWN )
+    {
+        float x = ( rand() % 10000 ) / 1000.0f;
+        float y = ( rand() % 10000 ) / 1000.0f;
+        float w = ( rand() % 10000 ) / 100000.0f;
+        float h = ( rand() % 10000 ) / 100000.0f;
+
+        boost::geometry::index::insert(t, B(P(x - w, y - h),P(x + w, y + h)));
+
+        glutPostRedisplay();
+    }
+}
+
+int main(int argc, char **argv)
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);
+    glutInitWindowPosition(100,100);
+    glutInitWindowSize(800, 600);
+    glutCreateWindow("Mouse click to insert new value");
+
+    glutDisplayFunc(render_scene);
+    glutReshapeFunc(resize);
+    glutMouseFunc(mouse);
+
+    std::cout << "Mouse click to insert new value";
+
+    glutMainLoop();
+
+    return 0;
+}