1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #ifndef __ANIMABLE_H__ |
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30 | #define __ANIMABLE_H__ |
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31 | |
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32 | #include "OgrePrerequisites.h" |
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33 | #include "OgreVector2.h" |
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34 | #include "OgreVector3.h" |
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35 | #include "OgreVector4.h" |
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36 | #include "OgreQuaternion.h" |
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37 | #include "OgreColourValue.h" |
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38 | #include "OgreSharedPtr.h" |
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39 | #include "OgreStringVector.h" |
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40 | #include "OgreException.h" |
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41 | #include "OgreAny.h" |
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42 | |
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43 | namespace Ogre { |
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44 | |
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45 | /** Defines an object property which is animable, ie may be keyframed. |
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46 | @remarks |
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47 | Animable properties are those which can be altered over time by a |
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48 | predefined keyframe sequence. They may be set directly, or they may |
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49 | be modified from their existing state (common if multiple animations |
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50 | are expected to apply at once). Implementors of this interface are |
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51 | expected to override the 'setValue', 'setCurrentStateAsBaseValue' and |
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52 | 'applyDeltaValue' methods appropriate to the type in question, and to |
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53 | initialise the type. |
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54 | @par |
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55 | AnimableValue instances are accessible through any class which extends |
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56 | AnimableObject in order to expose it's animable properties. |
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57 | @note |
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58 | This class is an instance of the Adapter pattern, since it generalises |
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59 | access to a particular property. Whilst it could have been templated |
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60 | such that the type which was being referenced was compiled in, this would |
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61 | make it more difficult to aggregated generically, and since animations |
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62 | are often comprised of multiple properties it helps to be able to deal |
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63 | with all values through a single class. |
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64 | */ |
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65 | class _OgreExport AnimableValue |
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66 | { |
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67 | public: |
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68 | /// The type of the value being animated |
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69 | enum ValueType |
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70 | { |
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71 | INT, |
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72 | REAL, |
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73 | VECTOR2, |
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74 | VECTOR3, |
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75 | VECTOR4, |
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76 | QUATERNION, |
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77 | COLOUR |
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78 | }; |
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79 | protected: |
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80 | /// Value type |
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81 | ValueType mType; |
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82 | |
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83 | /// Base value data |
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84 | union |
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85 | { |
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86 | int mBaseValueInt; |
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87 | Real mBaseValueReal[4]; |
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88 | }; |
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89 | |
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90 | /// Internal method to set a value as base |
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91 | virtual void setAsBaseValue(int val) { mBaseValueInt = val; } |
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92 | /// Internal method to set a value as base |
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93 | virtual void setAsBaseValue(Real val) { mBaseValueReal[0] = val; } |
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94 | /// Internal method to set a value as base |
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95 | virtual void setAsBaseValue(const Vector2& val) |
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96 | { memcpy(mBaseValueReal, val.ptr(), sizeof(Real)*2); } |
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97 | /// Internal method to set a value as base |
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98 | virtual void setAsBaseValue(const Vector3& val) |
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99 | { memcpy(mBaseValueReal, val.ptr(), sizeof(Real)*3); } |
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100 | /// Internal method to set a value as base |
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101 | virtual void setAsBaseValue(const Vector4& val) |
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102 | { memcpy(mBaseValueReal, val.ptr(), sizeof(Real)*4); } |
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103 | /// Internal method to set a value as base |
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104 | virtual void setAsBaseValue(const Quaternion& val) |
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105 | { memcpy(mBaseValueReal, val.ptr(), sizeof(Real)*4); } |
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106 | /// Internal method to set a value as base |
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107 | virtual void setAsBaseValue(const Any& val); |
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108 | /// Internal method to set a value as base |
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109 | virtual void setAsBaseValue(const ColourValue& val) |
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110 | { |
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111 | mBaseValueReal[0] = val.r; |
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112 | mBaseValueReal[1] = val.g; |
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113 | mBaseValueReal[2] = val.b; |
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114 | mBaseValueReal[3] = val.a; |
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115 | } |
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116 | |
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117 | |
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118 | public: |
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119 | AnimableValue(ValueType t) : mType(t) {} |
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120 | virtual ~AnimableValue() {} |
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121 | |
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122 | /// Gets the value type of this animable value |
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123 | ValueType getType(void) const { return mType; } |
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124 | |
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125 | /// Sets the current state as the 'base' value; used for delta animation |
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126 | virtual void setCurrentStateAsBaseValue(void) = 0; |
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127 | |
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128 | /// Set value |
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129 | virtual void setValue(int) { |
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130 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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131 | } |
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132 | /// Set value |
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133 | virtual void setValue(Real) { |
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134 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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135 | } |
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136 | /// Set value |
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137 | virtual void setValue(const Vector2&) { |
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138 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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139 | } |
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140 | /// Set value |
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141 | virtual void setValue(const Vector3&) { |
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142 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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143 | } |
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144 | /// Set value |
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145 | virtual void setValue(const Vector4&) { |
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146 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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147 | } |
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148 | /// Set value |
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149 | virtual void setValue(const Quaternion&) { |
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150 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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151 | } |
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152 | /// Set value |
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153 | virtual void setValue(const ColourValue&) { |
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154 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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155 | } |
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156 | /// Set value |
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157 | virtual void setValue(const Any& val); |
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158 | |
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159 | // reset to base value |
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160 | virtual void resetToBaseValue(void); |
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161 | |
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162 | /// Apply delta value |
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163 | virtual void applyDeltaValue(int) { |
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164 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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165 | } |
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166 | /// Set value |
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167 | virtual void applyDeltaValue(Real) { |
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168 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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169 | } |
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170 | /// Apply delta value |
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171 | virtual void applyDeltaValue(const Vector2&) { |
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172 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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173 | } |
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174 | /// Apply delta value |
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175 | virtual void applyDeltaValue(const Vector3&) { |
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176 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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177 | } |
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178 | /// Apply delta value |
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179 | virtual void applyDeltaValue(const Vector4&) { |
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180 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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181 | } |
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182 | /// Apply delta value |
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183 | virtual void applyDeltaValue(const Quaternion&) { |
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184 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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185 | } |
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186 | /// Apply delta value |
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187 | virtual void applyDeltaValue(const ColourValue&) { |
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188 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", ""); |
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189 | } |
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190 | /// Apply delta value |
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191 | virtual void applyDeltaValue(const Any& val); |
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192 | |
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193 | |
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194 | }; |
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195 | |
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196 | typedef SharedPtr<AnimableValue> AnimableValuePtr; |
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197 | |
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198 | |
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199 | |
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200 | /** Defines an interface to classes which have one or more AnimableValue |
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201 | instances to expose. |
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202 | */ |
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203 | class _OgreExport AnimableObject |
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204 | { |
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205 | protected: |
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206 | typedef std::map<String, StringVector> AnimableDictionaryMap; |
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207 | /// Static map of class name to list of animable value names |
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208 | static AnimableDictionaryMap msAnimableDictionary; |
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209 | /** Get the name of the animable dictionary for this class. |
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210 | @remarks |
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211 | Subclasses must override this if they want to support animation of |
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212 | their values. |
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213 | */ |
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214 | virtual const String& getAnimableDictionaryName(void) const |
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215 | { return StringUtil::BLANK; } |
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216 | /** Internal method for creating a dictionary of animable value names |
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217 | for the class, if it does not already exist. |
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218 | */ |
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219 | void createAnimableDictionary(void) const |
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220 | { |
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221 | if (msAnimableDictionary.find(getAnimableDictionaryName()) |
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222 | == msAnimableDictionary.end()) |
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223 | { |
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224 | StringVector vec; |
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225 | initialiseAnimableDictionary(vec); |
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226 | msAnimableDictionary[getAnimableDictionaryName()] = vec; |
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227 | } |
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228 | |
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229 | } |
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230 | |
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231 | /// Get an updateable reference to animable value list |
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232 | StringVector& _getAnimableValueNames(void) |
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233 | { |
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234 | AnimableDictionaryMap::iterator i = |
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235 | msAnimableDictionary.find(getAnimableDictionaryName()); |
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236 | if (i != msAnimableDictionary.end()) |
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237 | { |
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238 | return i->second; |
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239 | } |
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240 | else |
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241 | { |
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242 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, |
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243 | "Animable value list not found for " + getAnimableDictionaryName(), |
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244 | "AnimableObject::getAnimableValueNames"); |
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245 | } |
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246 | |
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247 | } |
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248 | |
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249 | /** Internal method for initialising dictionary; should be implemented by |
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250 | subclasses wanting to expose animable parameters. |
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251 | */ |
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252 | virtual void initialiseAnimableDictionary(StringVector&) const {} |
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253 | |
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254 | |
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255 | public: |
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256 | AnimableObject() {} |
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257 | virtual ~AnimableObject() {} |
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258 | |
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259 | /** Gets a list of animable value names for this object. */ |
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260 | const StringVector& getAnimableValueNames(void) const |
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261 | { |
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262 | createAnimableDictionary(); |
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263 | |
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264 | AnimableDictionaryMap::iterator i = |
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265 | msAnimableDictionary.find(getAnimableDictionaryName()); |
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266 | if (i != msAnimableDictionary.end()) |
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267 | { |
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268 | return i->second; |
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269 | } |
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270 | else |
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271 | { |
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272 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, |
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273 | "Animable value list not found for " + getAnimableDictionaryName(), |
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274 | "AnimableObject::getAnimableValueNames"); |
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275 | } |
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276 | |
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277 | } |
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278 | |
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279 | /** Create a reference-counted AnimableValuePtr for the named value. |
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280 | @remarks |
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281 | You can use the returned object to animate a value on this object, |
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282 | using AnimationTrack. Subclasses must override this if they wish |
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283 | to support animation of their values. |
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284 | */ |
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285 | virtual AnimableValuePtr createAnimableValue(const String& valueName) |
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286 | { |
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287 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, |
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288 | "No animable value named '" + valueName + "' present.", |
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289 | "AnimableObject::createAnimableValue"); |
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290 | } |
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291 | |
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292 | |
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293 | |
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294 | }; |
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295 | |
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296 | |
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297 | } |
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298 | #endif |
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299 | |
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