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Diffstat (limited to 'indra/newview/gltf/animation.h')
| -rw-r--r-- | indra/newview/gltf/animation.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/indra/newview/gltf/animation.h b/indra/newview/gltf/animation.h new file mode 100644 index 0000000000..cc2045ebb2 --- /dev/null +++ b/indra/newview/gltf/animation.h @@ -0,0 +1,179 @@ +#pragma once + +/** + * @file animation.h + * @brief LL GLTF Animation Implementation + * + * $LicenseInfo:firstyear=2024&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2024, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +#include "accessor.h" + +// LL GLTF Implementation +namespace LL +{ + namespace GLTF + { + class Asset; + + class Animation + { + public: + class Sampler + { + public: + std::vector<F32> mFrameTimes; + + F32 mMinTime = -FLT_MAX; + F32 mMaxTime = FLT_MAX; + + S32 mInput = INVALID_INDEX; + S32 mOutput = INVALID_INDEX; + std::string mInterpolation; + + void allocateGLResources(Asset& asset); + + const Sampler& operator=(const tinygltf::AnimationSampler& src) + { + mInput = src.input; + mOutput = src.output; + mInterpolation = src.interpolation; + + return *this; + } + + // get the frame index and time for the specified time + // asset -- the asset to reference for Accessors + // time -- the animation time to get the frame info for + // frameIndex -- index of the closest frame that precedes the specified time + // t - interpolant value between the frameIndex and the next frame + void getFrameInfo(Asset& asset, F32 time, U32& frameIndex, F32& t); + }; + + class Channel + { + public: + class Target + { + public: + S32 mNode = INVALID_INDEX; + std::string mPath; + }; + + S32 mSampler = INVALID_INDEX; + Target mTarget; + + const Channel& operator=(const tinygltf::AnimationChannel& src) + { + mSampler = src.sampler; + + mTarget.mNode = src.target_node; + mTarget.mPath = src.target_path; + + return *this; + } + + }; + + class RotationChannel : public Channel + { + public: + std::vector<glh::quaternionf> mRotations; + + const RotationChannel& operator=(const tinygltf::AnimationChannel& src) + { + Channel::operator=(src); + return *this; + } + + // prepare data needed for rendering + // asset -- asset to reference for Accessors + // sampler -- Sampler associated with this channel + void allocateGLResources(Asset& asset, Sampler& sampler); + + void apply(Asset& asset, Sampler& sampler, F32 time); + }; + + class TranslationChannel : public Channel + { + public: + std::vector<glh::vec3f> mTranslations; + + const TranslationChannel& operator=(const tinygltf::AnimationChannel& src) + { + Channel::operator=(src); + return *this; + } + + // prepare data needed for rendering + // asset -- asset to reference for Accessors + // sampler -- Sampler associated with this channel + void allocateGLResources(Asset& asset, Sampler& sampler); + + void apply(Asset& asset, Sampler& sampler, F32 time); + }; + + class ScaleChannel : public Channel + { + public: + std::vector<glh::vec3f> mScales; + + const ScaleChannel& operator=(const tinygltf::AnimationChannel& src) + { + Channel::operator=(src); + return *this; + } + + // prepare data needed for rendering + // asset -- asset to reference for Accessors + // sampler -- Sampler associated with this channel + void allocateGLResources(Asset& asset, Sampler& sampler); + + void apply(Asset& asset, Sampler& sampler, F32 time); + }; + + std::string mName; + std::vector<Sampler> mSamplers; + + // min/max time values for all samplers combined + F32 mMinTime = 0.f; + F32 mMaxTime = 0.f; + + // current time of the animation + F32 mTime = 0.f; + + std::vector<RotationChannel> mRotationChannels; + std::vector<TranslationChannel> mTranslationChannels; + std::vector<ScaleChannel> mScaleChannels; + + const Animation& operator=(const tinygltf::Animation& src); + + void allocateGLResources(Asset& asset); + + void update(Asset& asset, float dt); + + // apply this animation at the specified time + void apply(Asset& asset, F32 time); + }; + + } +} |