2 files changed, 65 insertions, 0 deletions

diff --git a/src/model/geometry/datarose_geometry.c b/src/model/geometry/datarose_geometry.c
new file mode 100644
index 0000000..dded424
--- a/dev/null
+++ b/src/model/geometry/datarose_geometry.c
@@ -0,0 +1,54 @@
+#include "datarose_geometry.h"
+#include "../../util/check_error.h"
+#include "../../view/state0.h"
+#include <GL/glut.h>
+
+#define S state0
+
+void
+datarose_geometry (void)
+{
+  glNewList (S.list_offset + DATAROSE_GEOMETRY, GL_COMPILE);
+  glPolygonMode (GL_FRONT, GL_FILL);
+  glColor4f (DEFAULT_COLOR_R, DEFAULT_COLOR_G, DEFAULT_COLOR_B,
+             DEFAULT_COLOR_A);
+
+  /*
+   * The size of the rose will be a percentage of the world height so
+   * that it remains a fixed size when the window is resized or
+   * zoomed.
+   */
+  GLint viewport[4];
+  glGetIntegerv (GL_VIEWPORT, viewport);
+  const double *top = &S.ortho.max_y;
+  const double *bottom = &S.ortho.min_y;
+  double rose_radius = (*top - *bottom) / viewport[3] * 110.0;
+
+  /*
+   * Place the rose in the upper right of the display.
+   */
+  glMatrixMode (GL_MODELVIEW);
+  glPushMatrix ();
+  glLoadIdentity ();
+  const double *right = &S.ortho.max_x;
+  glTranslatef (*right - rose_radius - (rose_radius * 0.40), 
+                *top - rose_radius - (rose_radius * 0.80),
+                0.0);
+
+  /*
+   * Create a circle.
+   */
+  GLUquadricObj *obj = gluNewQuadric ();
+  gluQuadricDrawStyle (obj, GLU_LINE);
+  gluDisk (obj, rose_radius * 0.999, rose_radius, 60, 60);
+  
+  glPopMatrix ();
+
+  glEndList ();
+
+  gluDeleteQuadric (obj);
+
+  check_error (__FILE__, __LINE__);
+
+  return;
+}
diff --git a/src/model/geometry/datarose_geometry.h b/src/model/geometry/datarose_geometry.h
new file mode 100644
index 0000000..0823064
--- a/dev/null
+++ b/src/model/geometry/datarose_geometry.h
@@ -0,0 +1,11 @@
+#ifndef DATAROSE_GEOMETRY_H
+#define DATAROSE_GEOMETRY_H
+
+/*
+ * DataRose from Elmqvist, N.; Stasko, J. & Tsigas, P. "DataMeadow: a
+ * visual canvas for analysis of large-scale multivariate data",
+ * Information Visualization, Palgrave Macmillan Ltd, 2008, 7, 18-33.
+ */
+void datarose_geometry (void);
+
+#endif // DATAROSE_GEOMETRY_H