plugins/entity/rotation.h

   1 /*
   2    Copyright (C) 2001-2006, William Joseph.
   3    All Rights Reserved.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #if !defined( INCLUDED_ROTATION_H )
  23 #define INCLUDED_ROTATION_H
  24
  25 #include "ientity.h"
  26
  27 #include "math/quaternion.h"
  28 #include "generic/callback.h"
  29 #include "stringio.h"
  30
  31 #include <sstream>
  32
  33 #include "angle.h"
  34
  35 typedef float Float9[9];
  36
  37 inline void default_rotation( Float9 rotation ){
  38         rotation[0] = 1;
  39         rotation[1] = 0;
  40         rotation[2] = 0;
  41         rotation[3] = 0;
  42         rotation[4] = 1;
  43         rotation[5] = 0;
  44         rotation[6] = 0;
  45         rotation[7] = 0;
  46         rotation[8] = 1;
  47 }
  48 inline void write_rotation( const Float9 rotation, Entity* entity, const char* key = "rotation" ){
  49         if ( rotation[0] == 1
  50                  && rotation[1] == 0
  51                  && rotation[2] == 0
  52                  && rotation[3] == 0
  53                  && rotation[4] == 1
  54                  && rotation[5] == 0
  55                  && rotation[6] == 0
  56                  && rotation[7] == 0
  57                  && rotation[8] == 1 ) {
  58                 entity->setKeyValue( key, "" );
  59         }
  60         else
  61         {
  62                 std::ostringstream value;
  63                 value << rotation[0] << ' '
  64                           << rotation[1] << ' '
  65                           << rotation[2] << ' '
  66                           << rotation[3] << ' '
  67                           << rotation[4] << ' '
  68                           << rotation[5] << ' '
  69                           << rotation[6] << ' '
  70                           << rotation[7] << ' '
  71                           << rotation[8];
  72                 entity->setKeyValue( key, value.str().c_str() );
  73         }
  74 }
  75 inline void read_rotation( Float9 rotation, const char* value ){
  76         if ( !string_parse_vector( value, rotation, rotation + 9 ) ) {
  77                 default_rotation( rotation );
  78         }
  79 }
  80
  81 inline Matrix4 rotation_toMatrix( const Float9 rotation ){
  82         return Matrix4(
  83                            rotation[0],
  84                            rotation[1],
  85                            rotation[2],
  86                            0,
  87                            rotation[3],
  88                            rotation[4],
  89                            rotation[5],
  90                            0,
  91                            rotation[6],
  92                            rotation[7],
  93                            rotation[8],
  94                            0,
  95                            0,
  96                            0,
  97                            0,
  98                            1
  99                            );
 100 }
 101
 102 inline void rotation_fromMatrix( Float9 rotation, const Matrix4& matrix ){
 103         rotation[0] = matrix.xx();
 104         rotation[1] = matrix.xy();
 105         rotation[2] = matrix.xz();
 106         rotation[3] = matrix.yx();
 107         rotation[4] = matrix.yy();
 108         rotation[5] = matrix.yz();
 109         rotation[6] = matrix.zx();
 110         rotation[7] = matrix.zy();
 111         rotation[8] = matrix.zz();
 112 }
 113
 114 inline void rotation_assign( Float9 rotation, const Float9 other ){
 115         rotation[0] = other[0];
 116         rotation[1] = other[1];
 117         rotation[2] = other[2];
 118         rotation[3] = other[3];
 119         rotation[4] = other[4];
 120         rotation[5] = other[5];
 121         rotation[6] = other[6];
 122         rotation[7] = other[7];
 123         rotation[8] = other[8];
 124 }
 125
 126 inline void rotation_rotate( Float9 rotation, const Quaternion& rotate ){
 127         rotation_fromMatrix( rotation,
 128                                                  matrix4_multiplied_by_matrix4(
 129                                                          rotation_toMatrix( rotation ),
 130                                                          matrix4_rotation_for_quaternion_quantised( rotate )
 131                                                          )
 132                                                  );
 133 }
 134
 135 inline void read_angle( Float9 rotation, const char* value ){
 136         float angle;
 137         if ( !string_parse_float( value, angle ) ) {
 138                 default_rotation( rotation );
 139         }
 140         else
 141         {
 142                 rotation_fromMatrix( rotation,  matrix4_rotation_for_z_degrees( angle ) );
 143         }
 144 }
 145
 146 class RotationKey
 147 {
 148 Callback<void()> m_rotationChanged;
 149 public:
 150 Float9 m_rotation;
 151
 152
 153 RotationKey( const Callback<void()>& rotationChanged )
 154         : m_rotationChanged( rotationChanged ){
 155         default_rotation( m_rotation );
 156 }
 157
 158 void angleChanged( const char* value ){
 159         read_angle( m_rotation, value );
 160         m_rotationChanged();
 161 }
 162 typedef MemberCaller<RotationKey, void(const char*), &RotationKey::angleChanged> AngleChangedCaller;
 163
 164 void rotationChanged( const char* value ){
 165         read_rotation( m_rotation, value );
 166         m_rotationChanged();
 167 }
 168 typedef MemberCaller<RotationKey, void(const char*), &RotationKey::rotationChanged> RotationChangedCaller;
 169
 170 void write( Entity* entity ) const {
 171         Vector3 euler = matrix4_get_rotation_euler_xyz_degrees( rotation_toMatrix( m_rotation ) );
 172         if ( euler[0] == 0 && euler[1] == 0 ) {
 173                 entity->setKeyValue( "rotation", "" );
 174                 write_angle( euler[2], entity );
 175         }
 176         else
 177         {
 178                 entity->setKeyValue( "angle", "" );
 179                 write_rotation( m_rotation, entity );
 180         }
 181 }
 182 };
 183
 184 #endif