AnimTestbed/3rdparty/ozz-animation/howtos/custom_skeleton_importer.cc

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//----------------------------------------------------------------------------//
// //
// ozz-animation is hosted at http://github.com/guillaumeblanc/ozz-animation //
// and distributed under the MIT License (MIT). //
// //
// Copyright (c) Guillaume Blanc //
// //
// Permission is hereby granted, free of charge, to any person obtaining a //
// copy of this software and associated documentation files (the "Software"), //
// to deal in the Software without restriction, including without limitation //
// the rights to use, copy, modify, merge, publish, distribute, sublicense, //
// and/or sell copies of the Software, and to permit persons to whom the //
// Software is furnished to do so, subject to the following conditions: //
// //
// The above copyright notice and this permission notice shall be included in //
// all copies or substantial portions of the Software. //
// //
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR //
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, //
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL //
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER //
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING //
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER //
// DEALINGS IN THE SOFTWARE. //
// //
//----------------------------------------------------------------------------//
#include <cstdlib>
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#include "ozz/animation/offline/raw_skeleton.h"
#include "ozz/animation/offline/skeleton_builder.h"
#include "ozz/animation/runtime/skeleton.h"
// Code for ozz-animation HowTo: "How to write a custon skeleton importer?"
int main(int argc, char const* argv[]) {
(void)argc;
(void)argv;
//////////////////////////////////////////////////////////////////////////////
// The first section builds a RawSkeleton from custom data.
//////////////////////////////////////////////////////////////////////////////
// Creates a RawSkeleton.
ozz::animation::offline::RawSkeleton raw_skeleton;
// Creates the root joint.
raw_skeleton.roots.resize(1);
ozz::animation::offline::RawSkeleton::Joint& root = raw_skeleton.roots[0];
// Setup root joints name.
root.name = "root";
// Setup root joints rest pose transformation, in joint local-space.
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// This is the default skeleton posture (most of the time a T-pose). It's
// used as a fallback when there's no animation for a joint.
root.transform.translation = ozz::math::Float3(0.f, 1.f, 0.f);
root.transform.rotation = ozz::math::Quaternion(0.f, 0.f, 0.f, 1.f);
root.transform.scale = ozz::math::Float3(1.f, 1.f, 1.f);
// Now adds 2 children to the root.
root.children.resize(2);
// Setups the 1st child name (left) and transfomation.
ozz::animation::offline::RawSkeleton::Joint& left = root.children[0];
left.name = "left";
left.transform.translation = ozz::math::Float3(1.f, 0.f, 0.f);
left.transform.rotation = ozz::math::Quaternion(0.f, 0.f, 0.f, 1.f);
left.transform.scale = ozz::math::Float3(1.f, 1.f, 1.f);
// Setups the 2nd child name (right) and transfomation.
ozz::animation::offline::RawSkeleton::Joint& right = root.children[1];
right.name = "right";
right.transform.translation = ozz::math::Float3(-1.f, 0.f, 0.f);
right.transform.rotation = ozz::math::Quaternion(0.f, 0.f, 0.f, 1.f);
right.transform.scale = ozz::math::Float3(1.f, 1.f, 1.f);
//...and so on with the whole skeleton hierarchy...
// Test for skeleton validity.
// The main invalidity reason is the number of joints, which must be lower
// than ozz::animation::Skeleton::kMaxJoints.
if (!raw_skeleton.Validate()) {
return EXIT_FAILURE;
}
//////////////////////////////////////////////////////////////////////////////
// This final section converts the RawSkeleton to a runtime Skeleton.
//////////////////////////////////////////////////////////////////////////////
// Creates a SkeletonBuilder instance.
ozz::animation::offline::SkeletonBuilder builder;
// Executes the builder on the previously prepared RawSkeleton, which returns
// a new runtime skeleton instance.
// This operation will fail and return an empty unique_ptr if the RawSkeleton
// isn't valid.
ozz::unique_ptr<ozz::animation::Skeleton> skeleton = builder(raw_skeleton);
// ...use the skeleton as you want...
return EXIT_SUCCESS;
}