From c50bc6329ff6e336de47efa7b2275c77e85a75a1 Mon Sep 17 00:00:00 2001
From: hugues <hugues@0f7e0d06-a6f9-0310-a55f-d5f984f55e4c>
Date: Thu, 10 Feb 2005 23:10:51 +0000
Subject: Initial revision

git-svn-id: file:///usr/local/opt/svn/repos/glagen@3 0f7e0d06-a6f9-0310-a55f-d5f984f55e4c
---
 trunk/glagen/3d/frame.cc | 152 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 trunk/glagen/3d/frame.cc

(limited to 'trunk/glagen/3d/frame.cc')

diff --git a/trunk/glagen/3d/frame.cc b/trunk/glagen/3d/frame.cc
new file mode 100644
index 0000000..6f3aabd
--- /dev/null
+++ b/trunk/glagen/3d/frame.cc
@@ -0,0 +1,152 @@
+//=============================================================================
+//
+// Glagen : a planet sized landscape generator
+// Copyright (C) 2002  Julien Guertault, Hugues Hiegel, Meng-Tih Lam
+//
+// 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+//=============================================================================
+//
+// Glagen : GPL LAndscape GENerator
+//
+// frame.cc for Glagen : made by Zavie (Julien Guertault)
+//
+// www.glagen.org
+//
+//=============================================================================
+
+#include	"data_glagen.hh"
+#include	"frame.hh"
+#include	"matrix3d.hh"
+#include	"vector.hh"
+
+// ================================================ Constructors and destructor
+
+Frame :: Frame ()
+{
+  _origin[0] = 0;
+  _origin[1] = 0;
+  _origin[2] = 0;
+  _basis[0] = Vector(1, 0, 0);
+  _basis[1] = Vector(0, 1, 0);
+  _basis[2] = Vector(0, 0, 1);
+}
+
+Frame :: Frame (float origin[3])
+{
+  _origin[0] = origin[0];
+  _origin[1] = origin[1];
+  _origin[2] = origin[2];
+  _basis[0] = Vector(1, 0, 0);
+  _basis[1] = Vector(0, 1, 0);
+  _basis[2] = Vector(0, 0, 1);
+}
+
+Frame :: Frame (float origin[3], Vector basis[3])
+{
+  _origin[0] = origin[0];
+  _origin[1] = origin[1];
+  _origin[2] = origin[2];
+  _basis[0] = Vector(basis[0]);
+  _basis[1] = Vector(basis[1]);
+  _basis[2] = Vector(basis[2]);
+}
+
+Frame :: ~Frame () {}
+
+// ==================================================================== Reading
+
+float		Frame :: Origin_X () const	{ return _origin[0]; }
+float		Frame :: Origin_Y () const	{ return _origin[1]; }
+float		Frame :: Origin_Z () const	{ return _origin[2]; }
+Vector		Frame :: Basis_X () const	{ return _basis[0]; }
+Vector		Frame :: Basis_Y () const	{ return _basis[1]; }
+Vector		Frame :: Basis_Z () const	{ return _basis[2]; }
+
+Vector		Frame :: View ()		{ return Vector (_basis[2]); }
+
+Matrix44	Frame :: GetMatrix ()
+{
+  int		x;
+  float		basis_matrix[3][3];
+
+  for (x = 0; x < 3; x++)
+    {
+      basis_matrix[x][0] = _basis[x].X ();
+      basis_matrix[x][1] = _basis[x].Y ();
+      basis_matrix[x][2] = _basis[x].Z ();
+    }
+  Matrix44 rot_matrix(basis_matrix);
+  Matrix44 trans_matrix(_origin);
+  return Matrix44 (trans_matrix * rot_matrix);
+}
+
+Matrix44	Frame :: GetCamMatrix ()
+{
+  int		x;
+  float		basis_matrix[3][3];
+
+  for (x = 0; x < 3; x++)
+    {
+      basis_matrix[x][0] = _basis[x].X ();
+      basis_matrix[x][1] = _basis[x].Y ();
+      basis_matrix[x][2] = _basis[x].Z ();
+    }
+  Matrix44 rot_matrix(basis_matrix);
+  Matrix44 trans_matrix(_origin);
+  return Matrix44 (rot_matrix * trans_matrix);
+}
+
+// ==================================================================== Writing
+
+void		Frame :: Reset_origin ()
+{
+  _origin[0] = 0;
+  _origin[1] = 0;
+  _origin[2] = 0;
+}
+
+void		Frame :: Reset_basis ()
+{
+  _basis[0].Set (1, 0, 0) ;
+  _basis[1].Set (0, 1, 0) ;
+  _basis[2].Set (0, 0, 1) ;
+}
+
+void		Frame :: Set_origin (const float origin[3])
+{
+  _origin[0] = origin[0];
+  _origin[1] = origin[1];
+  _origin[2] = origin[2];
+}
+
+void		Frame :: Translate (const Vector v)
+{
+  _origin[0] = _origin[0] + v.X ();
+  _origin[1] = _origin[1] + v.Y ();
+  _origin[2] = _origin[2] + v.Z ();
+}
+
+void		Frame :: Rotate (const float angle, const Vector v)
+{
+  Matrix33	rot (angle, v);
+
+  _basis[0] = rot * _basis[0];
+  _basis[1] = rot * _basis[1];
+  _basis[2] = rot * _basis[2];
+  _basis[0].Normalize ();
+  _basis[1].Normalize ();
+  _basis[2].Normalize ();
+}
-- 
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