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 "stream/stringstream.h"
  28 #include "math/quaternion.h"
  29 #include "generic/callback.h"
  30 #include "stringio.h"
  31
  32 #include "angle.h"
  33
  34 typedef float Float9[9];
  35
  36 inline void default_rotation( Float9 rotation ){
  37         rotation[0] = 1;
  38         rotation[1] = 0;
  39         rotation[2] = 0;
  40         rotation[3] = 0;
  41         rotation[4] = 1;
  42         rotation[5] = 0;
  43         rotation[6] = 0;
  44         rotation[7] = 0;
  45         rotation[8] = 1;
  46 }
  47 inline void write_rotation( const Float9 rotation, Entity* entity, const char* key = "rotation" ){
  48         if ( rotation[0] == 1
  49                  && rotation[1] == 0
  50                  && rotation[2] == 0
  51                  && rotation[3] == 0
  52                  && rotation[4] == 1
  53                  && rotation[5] == 0
  54                  && rotation[6] == 0
  55                  && rotation[7] == 0
  56                  && rotation[8] == 1 ) {
  57                 entity->setKeyValue( key, "" );
  58         }
  59         else
  60         {
  61                 StringOutputStream value( 256 );
  62                 value << rotation[0] << ' '
  63                           << rotation[1] << ' '
  64                           << rotation[2] << ' '
  65                           << rotation[3] << ' '
  66                           << rotation[4] << ' '
  67                           << rotation[5] << ' '
  68                           << rotation[6] << ' '
  69                           << rotation[7] << ' '
  70                           << rotation[8];
  71                 entity->setKeyValue( key, value.c_str() );
  72         }
  73 }
  74 inline void read_rotation( Float9 rotation, const char* value ){
  75         if ( !string_parse_vector( value, rotation, rotation + 9 ) ) {
  76                 default_rotation( rotation );
  77         }
  78 }
  79
  80 inline Matrix4 rotation_toMatrix( const Float9 rotation ){
  81         return Matrix4(
  82                            rotation[0],
  83                            rotation[1],
  84                            rotation[2],
  85                            0,
  86                            rotation[3],
  87                            rotation[4],
  88                            rotation[5],
  89                            0,
  90                            rotation[6],
  91                            rotation[7],
  92                            rotation[8],
  93                            0,
  94                            0,
  95                            0,
  96                            0,
  97                            1
  98                            );
  99 }
 100
 101 inline void rotation_fromMatrix( Float9 rotation, const Matrix4& matrix ){
 102         rotation[0] = matrix.xx();
 103         rotation[1] = matrix.xy();
 104         rotation[2] = matrix.xz();
 105         rotation[3] = matrix.yx();
 106         rotation[4] = matrix.yy();
 107         rotation[5] = matrix.yz();
 108         rotation[6] = matrix.zx();
 109         rotation[7] = matrix.zy();
 110         rotation[8] = matrix.zz();
 111 }
 112
 113 inline void rotation_assign( Float9 rotation, const Float9 other ){
 114         rotation[0] = other[0];
 115         rotation[1] = other[1];
 116         rotation[2] = other[2];
 117         rotation[3] = other[3];
 118         rotation[4] = other[4];
 119         rotation[5] = other[5];
 120         rotation[6] = other[6];
 121         rotation[7] = other[7];
 122         rotation[8] = other[8];
 123 }
 124
 125 inline void rotation_rotate( Float9 rotation, const Quaternion& rotate ){
 126         rotation_fromMatrix( rotation,
 127                                                  matrix4_multiplied_by_matrix4(
 128                                                          rotation_toMatrix( rotation ),
 129                                                          matrix4_rotation_for_quaternion_quantised( rotate )
 130                                                          )
 131                                                  );
 132 }
 133
 134 inline void read_angle( Float9 rotation, const char* value ){
 135         float angle;
 136         if ( !string_parse_float( value, angle ) ) {
 137                 default_rotation( rotation );
 138         }
 139         else
 140         {
 141                 rotation_fromMatrix( rotation,  matrix4_rotation_for_z_degrees( angle ) );
 142         }
 143 }
 144
 145 class RotationKey
 146 {
 147 Callback<void()> m_rotationChanged;
 148 public:
 149 Float9 m_rotation;
 150
 151
 152 RotationKey( const Callback<void()>& rotationChanged )
 153         : m_rotationChanged( rotationChanged ){
 154         default_rotation( m_rotation );
 155 }
 156
 157 void angleChanged( const char* value ){
 158         read_angle( m_rotation, value );
 159         m_rotationChanged();
 160 }
 161 typedef MemberCaller<RotationKey, void(const char*), &RotationKey::angleChanged> AngleChangedCaller;
 162
 163 void rotationChanged( const char* value ){
 164         read_rotation( m_rotation, value );
 165         m_rotationChanged();
 166 }
 167 typedef MemberCaller<RotationKey, void(const char*), &RotationKey::rotationChanged> RotationChangedCaller;
 168
 169 void write( Entity* entity ) const {
 170         Vector3 euler = matrix4_get_rotation_euler_xyz_degrees( rotation_toMatrix( m_rotation ) );
 171         if ( euler[0] == 0 && euler[1] == 0 ) {
 172                 entity->setKeyValue( "rotation", "" );
 173                 write_angle( euler[2], entity );
 174         }
 175         else
 176         {
 177                 entity->setKeyValue( "angle", "" );
 178                 write_rotation( m_rotation, entity );
 179         }
 180 }
 181 };
 182
 183 #endif