[1812] | 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) 2000-2005 The OGRE Team
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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 | */
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| 25 | #ifndef __ANIMABLE_H__
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| 26 | #define __ANIMABLE_H__
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| 27 |
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| 28 | #include "OgrePrerequisites.h"
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| 29 | #include "OgreVector2.h"
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| 30 | #include "OgreVector3.h"
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| 31 | #include "OgreVector4.h"
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| 32 | #include "OgreQuaternion.h"
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| 33 | #include "OgreColourValue.h"
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| 34 | #include "OgreSharedPtr.h"
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| 35 | #include "OgreStringVector.h"
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| 36 | #include "OgreException.h"
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| 37 | #include "OgreAny.h"
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| 38 |
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| 39 | namespace Ogre {
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| 40 |
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| 41 | /** Defines an object property which is animable, ie may be keyframed.
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| 42 | @remarks
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| 43 | Animable properties are those which can be altered over time by a
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| 44 | predefined keyframe sequence. They may be set directly, or they may
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| 45 | be modified from their existing state (common if multiple animations
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| 46 | are expected to apply at once). Implementors of this interface are
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| 47 | expected to override the 'setValue', 'setCurrentStateAsBaseValue' and
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| 48 | 'applyDeltaValue' methods appropriate to the type in question, and to
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| 49 | initialise the type.
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| 50 | @par
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| 51 | AnimableValue instances are accessible through any class which extends
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| 52 | AnimableObject in order to expose it's animable properties.
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| 53 | @note
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| 54 | This class is an instance of the Adapter pattern, since it generalises
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| 55 | access to a particular property. Whilst it could have been templated
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| 56 | such that the type which was being referenced was compiled in, this would
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| 57 | make it more difficult to aggregated generically, and since animations
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| 58 | are often comprised of multiple properties it helps to be able to deal
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| 59 | with all values through a single class.
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| 60 | */
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| 61 | class _OgreExport AnimableValue
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| 62 | {
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| 63 | public:
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| 64 | /// The type of the value being animated
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| 65 | enum ValueType
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| 66 | {
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| 67 | INT,
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| 68 | REAL,
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| 69 | VECTOR2,
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| 70 | VECTOR3,
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| 71 | VECTOR4,
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| 72 | QUATERNION,
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| 73 | COLOUR
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| 74 | };
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| 75 | protected:
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| 76 | /// Value type
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| 77 | ValueType mType;
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| 78 |
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| 79 | /// Base value data
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| 80 | union
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| 81 | {
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| 82 | int mBaseValueInt;
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| 83 | Real mBaseValueReal[4];
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| 84 | };
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| 85 |
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| 86 | /// Internal method to set a value as base
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| 87 | virtual void setAsBaseValue(int val) { mBaseValueInt = val; }
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| 88 | /// Internal method to set a value as base
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| 89 | virtual void setAsBaseValue(Real val) { mBaseValueReal[0] = val; }
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| 90 | /// Internal method to set a value as base
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| 91 | virtual void setAsBaseValue(const Vector2& val)
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| 92 | { memcpy(mBaseValueReal, val.val, sizeof(Real)*2); }
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| 93 | /// Internal method to set a value as base
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| 94 | virtual void setAsBaseValue(const Vector3& val)
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| 95 | { memcpy(mBaseValueReal, val.val, sizeof(Real)*3); }
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| 96 | /// Internal method to set a value as base
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| 97 | virtual void setAsBaseValue(const Vector4& val)
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| 98 | { memcpy(mBaseValueReal, val.val, sizeof(Real)*4); }
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| 99 | /// Internal method to set a value as base
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| 100 | virtual void setAsBaseValue(const Quaternion& val)
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| 101 | { memcpy(mBaseValueReal, val.val, sizeof(Real)*4); }
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| 102 | /// Internal method to set a value as base
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| 103 | virtual void setAsBaseValue(const Any& val);
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| 104 | /// Internal method to set a value as base
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| 105 | virtual void setAsBaseValue(const ColourValue& val)
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| 106 | {
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| 107 | mBaseValueReal[0] = val.r;
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| 108 | mBaseValueReal[1] = val.g;
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| 109 | mBaseValueReal[2] = val.b;
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| 110 | mBaseValueReal[3] = val.a;
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| 111 | }
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| 112 |
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| 113 |
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| 114 | public:
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| 115 | AnimableValue(ValueType t) : mType(t) {}
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| 116 | virtual ~AnimableValue() {}
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| 117 |
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| 118 | /// Gets the value type of this animable value
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| 119 | ValueType getType(void) const { return mType; }
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| 120 |
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| 121 | /// Sets the current state as the 'base' value; used for delta animation
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| 122 | virtual void setCurrentStateAsBaseValue(void) = 0;
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| 123 |
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| 124 | /// Set value
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| 125 | virtual void setValue(int val) {
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| 126 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", "");
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| 127 | }
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| 128 | /// Set value
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| 129 | virtual void setValue(Real val) {
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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(const Vector2& val) {
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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 Vector3& val) {
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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 Vector4& val) {
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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 Quaternion& val) {
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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 ColourValue& val) {
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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 Any& val);
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| 154 |
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| 155 | // reset to base value
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| 156 | virtual void resetToBaseValue(void);
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| 157 |
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| 158 | /// Apply delta value
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| 159 | virtual void applyDeltaValue(int val) {
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| 160 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", "");
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| 161 | }
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| 162 | /// Set value
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| 163 | virtual void applyDeltaValue(Real val) {
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| 164 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "", "");
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| 165 | }
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| 166 | /// Apply delta value
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| 167 | virtual void applyDeltaValue(const Vector2& val) {
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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 Vector3& val) {
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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 Vector4& val) {
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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 Quaternion& val) {
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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 ColourValue& val) {
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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 Any& val);
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| 188 |
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| 189 |
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| 190 | };
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| 191 |
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| 192 | typedef SharedPtr<AnimableValue> AnimableValuePtr;
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| 193 |
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| 194 |
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| 195 |
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| 196 | /** Defines an interface to classes which have one or more AnimableValue
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| 197 | instances to expose.
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| 198 | */
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| 199 | class _OgreExport AnimableObject
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| 200 | {
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| 201 | protected:
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| 202 | typedef std::map<String, StringVector> AnimableDictionaryMap;
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| 203 | /// Static map of class name to list of animable value names
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| 204 | static AnimableDictionaryMap msAnimableDictionary;
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| 205 | /** Get the name of the animable dictionary for this class.
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| 206 | @remarks
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| 207 | Subclasses must override this if they want to support animation of
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| 208 | their values.
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| 209 | */
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| 210 | virtual const String& getAnimableDictionaryName(void) const
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| 211 | { return StringUtil::BLANK; }
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| 212 | /** Internal method for creating a dictionary of animable value names
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| 213 | for the class, if it does not already exist.
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| 214 | */
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| 215 | void createAnimableDictionary(void) const
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| 216 | {
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| 217 | if (msAnimableDictionary.find(getAnimableDictionaryName())
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| 218 | == msAnimableDictionary.end())
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| 219 | {
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| 220 | StringVector vec;
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| 221 | initialiseAnimableDictionary(vec);
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| 222 | msAnimableDictionary[getAnimableDictionaryName()] = vec;
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| 223 | }
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| 224 |
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| 225 | }
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| 226 |
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| 227 | /// Get an updateable reference to animable value list
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| 228 | StringVector& _getAnimableValueNames(void)
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| 229 | {
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| 230 | AnimableDictionaryMap::iterator i =
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| 231 | msAnimableDictionary.find(getAnimableDictionaryName());
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| 232 | if (i != msAnimableDictionary.end())
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| 233 | {
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| 234 | return i->second;
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| 235 | }
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| 236 | else
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| 237 | {
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| 238 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
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| 239 | "Animable value list not found for " + getAnimableDictionaryName(),
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| 240 | "AnimableObject::getAnimableValueNames");
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| 241 | }
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| 242 |
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| 243 | }
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| 244 |
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| 245 | /** Internal method for initialising dictionary; should be implemented by
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| 246 | subclasses wanting to expose animable parameters.
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| 247 | */
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| 248 | virtual void initialiseAnimableDictionary(StringVector& vec) const {}
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| 249 |
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| 250 |
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| 251 | public:
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| 252 | AnimableObject() {}
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| 253 | virtual ~AnimableObject() {}
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| 254 |
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| 255 | /** Gets a list of animable value names for this object. */
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| 256 | const StringVector& getAnimableValueNames(void) const
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| 257 | {
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| 258 | createAnimableDictionary();
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| 259 |
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| 260 | AnimableDictionaryMap::iterator i =
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| 261 | msAnimableDictionary.find(getAnimableDictionaryName());
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| 262 | if (i != msAnimableDictionary.end())
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| 263 | {
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| 264 | return i->second;
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| 265 | }
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| 266 | else
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| 267 | {
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| 268 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
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| 269 | "Animable value list not found for " + getAnimableDictionaryName(),
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| 270 | "AnimableObject::getAnimableValueNames");
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| 271 | }
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| 272 |
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| 273 | }
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| 274 |
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| 275 | /** Create a reference-counted AnimableValuePtr for the named value.
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| 276 | @remarks
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| 277 | You can use the returned object to animate a value on this object,
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| 278 | using AnimationTrack. Subclasses must override this if they wish
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| 279 | to support animation of their values.
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| 280 | */
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| 281 | virtual AnimableValuePtr createAnimableValue(const String& valueName)
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| 282 | {
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| 283 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
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| 284 | "No animable value named '" + valueName + "' present.",
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| 285 | "AnimableObject::createAnimableValue");
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| 286 | }
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| 287 |
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| 288 |
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| 289 |
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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 | #endif
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| 295 |
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