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annotate libs/assimp/LWOAnimation.h @ 3:c179c72369be

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author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 03 Feb 2014 08:52:13 +0200
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nuclear@0 1 /*
nuclear@0 2 Open Asset Import Library (assimp)
nuclear@0 3 ----------------------------------------------------------------------
nuclear@0 4
nuclear@0 5 Copyright (c) 2006-2012, assimp team
nuclear@0 6 All rights reserved.
nuclear@0 7
nuclear@0 8 Redistribution and use of this software in source and binary forms,
nuclear@0 9 with or without modification, are permitted provided that the
nuclear@0 10 following conditions are met:
nuclear@0 11
nuclear@0 12 * Redistributions of source code must retain the above
nuclear@0 13 copyright notice, this list of conditions and the
nuclear@0 14 following disclaimer.
nuclear@0 15
nuclear@0 16 * Redistributions in binary form must reproduce the above
nuclear@0 17 copyright notice, this list of conditions and the
nuclear@0 18 following disclaimer in the documentation and/or other
nuclear@0 19 materials provided with the distribution.
nuclear@0 20
nuclear@0 21 * Neither the name of the assimp team, nor the names of its
nuclear@0 22 contributors may be used to endorse or promote products
nuclear@0 23 derived from this software without specific prior
nuclear@0 24 written permission of the assimp team.
nuclear@0 25
nuclear@0 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 37
nuclear@0 38 ----------------------------------------------------------------------
nuclear@0 39 */
nuclear@0 40
nuclear@0 41 /** @file LWOAnimation.h
nuclear@0 42 * @brief LWOAnimationResolver utility class
nuclear@0 43 *
nuclear@0 44 * This is for all lightwave-related file format, not only LWO.
nuclear@0 45 * LWS isthe main purpose.
nuclear@0 46 */
nuclear@0 47 #ifndef AI_LWO_ANIMATION_INCLUDED
nuclear@0 48 #define AI_LWO_ANIMATION_INCLUDED
nuclear@0 49
nuclear@0 50 namespace Assimp {
nuclear@0 51 namespace LWO {
nuclear@0 52
nuclear@0 53 // ---------------------------------------------------------------------------
nuclear@0 54 /** \brief List of recognized LWO envelopes
nuclear@0 55 */
nuclear@0 56 enum EnvelopeType
nuclear@0 57 {
nuclear@0 58 EnvelopeType_Position_X = 0x1,
nuclear@0 59 EnvelopeType_Position_Y = 0x2,
nuclear@0 60 EnvelopeType_Position_Z = 0x3,
nuclear@0 61
nuclear@0 62 EnvelopeType_Rotation_Heading = 0x4,
nuclear@0 63 EnvelopeType_Rotation_Pitch = 0x5,
nuclear@0 64 EnvelopeType_Rotation_Bank = 0x6,
nuclear@0 65
nuclear@0 66 EnvelopeType_Scaling_X = 0x7,
nuclear@0 67 EnvelopeType_Scaling_Y = 0x8,
nuclear@0 68 EnvelopeType_Scaling_Z = 0x9,
nuclear@0 69
nuclear@0 70 // -- currently not yet handled
nuclear@0 71 EnvelopeType_Color_R = 0xa,
nuclear@0 72 EnvelopeType_Color_G = 0xb,
nuclear@0 73 EnvelopeType_Color_B = 0xc,
nuclear@0 74
nuclear@0 75 EnvelopeType_Falloff_X = 0xd,
nuclear@0 76 EnvelopeType_Falloff_Y = 0xe,
nuclear@0 77 EnvelopeType_Falloff_Z = 0xf,
nuclear@0 78
nuclear@0 79 EnvelopeType_Unknown
nuclear@0 80 };
nuclear@0 81
nuclear@0 82 // ---------------------------------------------------------------------------
nuclear@0 83 /** \brief List of recognized LWO interpolation modes
nuclear@0 84 */
nuclear@0 85 enum InterpolationType
nuclear@0 86 {
nuclear@0 87 IT_STEP, IT_LINE, IT_TCB, IT_HERM, IT_BEZI, IT_BEZ2
nuclear@0 88 };
nuclear@0 89
nuclear@0 90
nuclear@0 91 // ---------------------------------------------------------------------------
nuclear@0 92 /** \brief List of recognized LWO pre or post range behaviours
nuclear@0 93 */
nuclear@0 94 enum PrePostBehaviour
nuclear@0 95 {
nuclear@0 96 PrePostBehaviour_Reset = 0x0,
nuclear@0 97 PrePostBehaviour_Constant = 0x1,
nuclear@0 98 PrePostBehaviour_Repeat = 0x2,
nuclear@0 99 PrePostBehaviour_Oscillate = 0x3,
nuclear@0 100 PrePostBehaviour_OffsetRepeat = 0x4,
nuclear@0 101 PrePostBehaviour_Linear = 0x5
nuclear@0 102 };
nuclear@0 103
nuclear@0 104 // ---------------------------------------------------------------------------
nuclear@0 105 /** \brief Data structure for a LWO animation keyframe
nuclear@0 106 */
nuclear@0 107 struct Key
nuclear@0 108 {
nuclear@0 109 Key()
nuclear@0 110 : inter (IT_LINE)
nuclear@0 111 {}
nuclear@0 112
nuclear@0 113 //! Current time
nuclear@0 114 double time;
nuclear@0 115
nuclear@0 116 //! Current value
nuclear@0 117 float value;
nuclear@0 118
nuclear@0 119 //! How to interpolate this key with previous key?
nuclear@0 120 InterpolationType inter;
nuclear@0 121
nuclear@0 122 //! Interpolation parameters
nuclear@0 123 float params[5];
nuclear@0 124
nuclear@0 125
nuclear@0 126 // for std::find()
nuclear@0 127 operator double () {
nuclear@0 128 return time;
nuclear@0 129 }
nuclear@0 130 };
nuclear@0 131
nuclear@0 132 // ---------------------------------------------------------------------------
nuclear@0 133 /** \brief Data structure for a LWO animation envelope
nuclear@0 134 */
nuclear@0 135 struct Envelope
nuclear@0 136 {
nuclear@0 137 Envelope()
nuclear@0 138 : type (EnvelopeType_Unknown)
nuclear@0 139 , pre (PrePostBehaviour_Constant)
nuclear@0 140 , post (PrePostBehaviour_Constant)
nuclear@0 141
nuclear@0 142 , old_first (0)
nuclear@0 143 , old_last (0)
nuclear@0 144 {}
nuclear@0 145
nuclear@0 146 //! Index of this envelope
nuclear@0 147 unsigned int index;
nuclear@0 148
nuclear@0 149 //! Type of envelope
nuclear@0 150 EnvelopeType type;
nuclear@0 151
nuclear@0 152 //! Pre and post-behaviour
nuclear@0 153 PrePostBehaviour pre,post;
nuclear@0 154
nuclear@0 155 //! Keyframes for this envelope
nuclear@0 156 std::vector<Key> keys;
nuclear@0 157
nuclear@0 158
nuclear@0 159 // temporary data for AnimResolver
nuclear@0 160 size_t old_first,old_last;
nuclear@0 161 };
nuclear@0 162
nuclear@0 163 // ---------------------------------------------------------------------------
nuclear@0 164 //! @def AI_LWO_ANIM_FLAG_SAMPLE_ANIMS
nuclear@0 165 //! Flag for AnimResolver, subsamples the input data with the rate specified
nuclear@0 166 //! by AnimResolver::SetSampleRate().
nuclear@0 167 #define AI_LWO_ANIM_FLAG_SAMPLE_ANIMS 0x1
nuclear@0 168
nuclear@0 169
nuclear@0 170 // ---------------------------------------------------------------------------
nuclear@0 171 //! @def AI_LWO_ANIM_FLAG_START_AT_ZERO
nuclear@0 172 //! Flag for AnimResolver, ensures that the animations starts at zero.
nuclear@0 173 #define AI_LWO_ANIM_FLAG_START_AT_ZERO 0x2
nuclear@0 174
nuclear@0 175 // ---------------------------------------------------------------------------
nuclear@0 176 /** @brief Utility class to build Assimp animations from LWO envelopes.
nuclear@0 177 *
nuclear@0 178 * Used for both LWO and LWS (MOT also).
nuclear@0 179 */
nuclear@0 180 class AnimResolver
nuclear@0 181 {
nuclear@0 182 public:
nuclear@0 183
nuclear@0 184 // ------------------------------------------------------------------
nuclear@0 185 /** @brief Construct an AnimResolver from a given list of envelopes
nuclear@0 186 * @param envelopes Input envelopes. May be empty.
nuclear@0 187 * @param Output tick rate, per second
nuclear@0 188 * @note The input envelopes are possibly modified.
nuclear@0 189 */
nuclear@0 190 AnimResolver(std::list<Envelope>& envelopes,
nuclear@0 191 double tick);
nuclear@0 192
nuclear@0 193 public:
nuclear@0 194
nuclear@0 195 // ------------------------------------------------------------------
nuclear@0 196 /** @brief Extract the bind-pose transformation matrix.
nuclear@0 197 * @param out Receives bind-pose transformation matrix
nuclear@0 198 */
nuclear@0 199 void ExtractBindPose(aiMatrix4x4& out);
nuclear@0 200
nuclear@0 201 // ------------------------------------------------------------------
nuclear@0 202 /** @brief Extract a node animation channel
nuclear@0 203 * @param out Receives a pointer to a newly allocated node anim.
nuclear@0 204 * If there's just one keyframe defined, *out is set to NULL and
nuclear@0 205 * no animation channel is computed.
nuclear@0 206 * @param flags Any combination of the AI_LWO_ANIM_FLAG_XXX flags.
nuclear@0 207 */
nuclear@0 208 void ExtractAnimChannel(aiNodeAnim** out, unsigned int flags = 0);
nuclear@0 209
nuclear@0 210
nuclear@0 211 // ------------------------------------------------------------------
nuclear@0 212 /** @brief Set the sampling rate for ExtractAnimChannel().
nuclear@0 213 *
nuclear@0 214 * Non-linear interpolations are subsampled with this rate (keys
nuclear@0 215 * per second). Closer sampling positions, if existent, are kept.
nuclear@0 216 * The sampling rate defaults to 0, if this value is not changed and
nuclear@0 217 * AI_LWO_ANIM_FLAG_SAMPLE_ANIMS is specified for ExtractAnimChannel(),
nuclear@0 218 * the class finds a suitable sample rate by itself.
nuclear@0 219 */
nuclear@0 220 void SetSampleRate(double sr) {
nuclear@0 221 sample_rate = sr;
nuclear@0 222 }
nuclear@0 223
nuclear@0 224 // ------------------------------------------------------------------
nuclear@0 225 /** @brief Getter for SetSampleRate()
nuclear@0 226 */
nuclear@0 227 double GetSampleRate() const {
nuclear@0 228 return sample_rate;
nuclear@0 229 }
nuclear@0 230
nuclear@0 231 // ------------------------------------------------------------------
nuclear@0 232 /** @brief Set the animation time range
nuclear@0 233 *
nuclear@0 234 * @param first Time where the animation starts, in ticks
nuclear@0 235 * @param last Time where the animation ends, in ticks
nuclear@0 236 */
nuclear@0 237 void SetAnimationRange(double _first, double _last) {
nuclear@0 238 first = _first;
nuclear@0 239 last = _last;
nuclear@0 240
nuclear@0 241 ClearAnimRangeSetup();
nuclear@0 242 UpdateAnimRangeSetup();
nuclear@0 243 }
nuclear@0 244
nuclear@0 245 protected:
nuclear@0 246
nuclear@0 247 // ------------------------------------------------------------------
nuclear@0 248 /** @brief Build linearly subsampled keys from 3 single envelopes
nuclear@0 249 * @param out Receives output keys
nuclear@0 250 * @param envl_x X-component envelope
nuclear@0 251 * @param envl_y Y-component envelope
nuclear@0 252 * @param envl_z Z-component envelope
nuclear@0 253 * @param flags Any combination of the AI_LWO_ANIM_FLAG_XXX flags.
nuclear@0 254 * @note Up to two input envelopes may be NULL
nuclear@0 255 */
nuclear@0 256 void GetKeys(std::vector<aiVectorKey>& out,
nuclear@0 257 LWO::Envelope* envl_x,
nuclear@0 258 LWO::Envelope* envl_y,
nuclear@0 259 LWO::Envelope* envl_z,
nuclear@0 260 unsigned int flags);
nuclear@0 261
nuclear@0 262 // ------------------------------------------------------------------
nuclear@0 263 /** @brief Resolve a single animation key by applying the right
nuclear@0 264 * interpolation to it.
nuclear@0 265 * @param cur Current key
nuclear@0 266 * @param envl Envelope working on
nuclear@0 267 * @param time time to be interpolated
nuclear@0 268 * @param fill Receives the interpolated output value.
nuclear@0 269 */
nuclear@0 270 void DoInterpolation(std::vector<LWO::Key>::const_iterator cur,
nuclear@0 271 LWO::Envelope* envl,double time, float& fill);
nuclear@0 272
nuclear@0 273 // ------------------------------------------------------------------
nuclear@0 274 /** @brief Almost the same, except we won't handle pre/post
nuclear@0 275 * conditions here.
nuclear@0 276 * @see DoInterpolation
nuclear@0 277 */
nuclear@0 278 void DoInterpolation2(std::vector<LWO::Key>::const_iterator beg,
nuclear@0 279 std::vector<LWO::Key>::const_iterator end,double time, float& fill);
nuclear@0 280
nuclear@0 281 // ------------------------------------------------------------------
nuclear@0 282 /** @brief Interpolate 2 tracks if one is given
nuclear@0 283 *
nuclear@0 284 * @param out Receives extra output keys
nuclear@0 285 * @param key_out Primary output key
nuclear@0 286 * @param time Time to interpolate for
nuclear@0 287 */
nuclear@0 288 void InterpolateTrack(std::vector<aiVectorKey>& out,
nuclear@0 289 aiVectorKey& key_out,double time);
nuclear@0 290
nuclear@0 291 // ------------------------------------------------------------------
nuclear@0 292 /** @brief Subsample an animation track by a given sampling rate
nuclear@0 293 *
nuclear@0 294 * @param out Receives output keys. Last key at input defines the
nuclear@0 295 * time where subsampling starts.
nuclear@0 296 * @param time Time to end subsampling at
nuclear@0 297 * @param sample_delta Time delta between two samples
nuclear@0 298 */
nuclear@0 299 void SubsampleAnimTrack(std::vector<aiVectorKey>& out,
nuclear@0 300 double time,double sample_delta);
nuclear@0 301
nuclear@0 302 // ------------------------------------------------------------------
nuclear@0 303 /** @brief Delete all keys which we inserted to match anim setup
nuclear@0 304 */
nuclear@0 305 void ClearAnimRangeSetup();
nuclear@0 306
nuclear@0 307 // ------------------------------------------------------------------
nuclear@0 308 /** @brief Insert extra keys to match LWO's pre and post behaviours
nuclear@0 309 * in a given time range [first...last]
nuclear@0 310 */
nuclear@0 311 void UpdateAnimRangeSetup();
nuclear@0 312
nuclear@0 313 private:
nuclear@0 314 std::list<Envelope>& envelopes;
nuclear@0 315 double sample_rate;
nuclear@0 316
nuclear@0 317 LWO::Envelope* trans_x, *trans_y, *trans_z;
nuclear@0 318 LWO::Envelope* rotat_x, *rotat_y, *rotat_z;
nuclear@0 319 LWO::Envelope* scale_x, *scale_y, *scale_z;
nuclear@0 320
nuclear@0 321 double first, last;
nuclear@0 322 bool need_to_setup;
nuclear@0 323
nuclear@0 324 // temporary storage
nuclear@0 325 LWO::Envelope* envl_x, * envl_y, * envl_z;
nuclear@0 326 std::vector<LWO::Key>::const_iterator cur_x,cur_y,cur_z;
nuclear@0 327 bool end_x, end_y, end_z;
nuclear@0 328
nuclear@0 329 unsigned int flags;
nuclear@0 330 double sample_delta;
nuclear@0 331 };
nuclear@0 332
nuclear@0 333 } // end namespace LWO
nuclear@0 334 } // end namespace Assimp
nuclear@0 335
nuclear@0 336 #endif // !! AI_LWO_ANIMATION_INCLUDED