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AnimTestbed/3rdparty/ozz-animation/samples/partial_blend/sample_partial_blend.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 <cstring>
#include "framework/application.h"
#include "framework/imgui.h"
#include "framework/renderer.h"
#include "framework/utils.h"
#include "ozz/animation/runtime/animation.h"
#include "ozz/animation/runtime/blending_job.h"
#include "ozz/animation/runtime/local_to_model_job.h"
#include "ozz/animation/runtime/sampling_job.h"
#include "ozz/animation/runtime/skeleton.h"
#include "ozz/animation/runtime/skeleton_utils.h"
#include "ozz/base/containers/vector.h"
#include "ozz/base/log.h"
#include "ozz/base/maths/simd_math.h"
#include "ozz/base/maths/soa_transform.h"
#include "ozz/base/maths/vec_float.h"
#include "ozz/options/options.h"
// Skeleton archive can be specified as an option.
OZZ_OPTIONS_DECLARE_STRING(skeleton,
"Path to the skeleton (ozz archive format).",
"media/skeleton.ozz", false)
// Lower body animation archive can be specified as an option.
OZZ_OPTIONS_DECLARE_STRING(
lower_body_animation,
"Path to the lower body animation(ozz archive format).",
"media/animation_base.ozz", false)
// Upper body animation archive can be specified as an option.
OZZ_OPTIONS_DECLARE_STRING(
upper_body_animation,
"Path to the upper body animation (ozz archive format).",
"media/animation_partial.ozz", false)
class PartialBlendSampleApplication : public ozz::sample::Application {
public:
PartialBlendSampleApplication()
: upper_body_root_(0),
threshold_(ozz::animation::BlendingJob().threshold) {}
protected:
// Updates current animation time and skeleton pose.
virtual bool OnUpdate(float _dt, float) {
// Updates and samples both animations to their respective local space
// transform buffers.
for (int i = 0; i < kNumLayers; ++i) {
Sampler& sampler = samplers_[i];
// Updates animations time.
sampler.controller.Update(sampler.animation, _dt);
// Setup sampling job.
ozz::animation::SamplingJob sampling_job;
sampling_job.animation = &sampler.animation;
sampling_job.context = &sampler.context;
sampling_job.ratio = sampler.controller.time_ratio();
sampling_job.output = make_span(sampler.locals);
// Samples animation.
if (!sampling_job.Run()) {
return false;
}
}
// Blends animations.
// Blends the local spaces transforms computed by sampling all animations
// (1st stage just above), and outputs the result to the local space
// transform buffer blended_locals_
// Prepares blending layers.
ozz::animation::BlendingJob::Layer layers[kNumLayers];
for (int i = 0; i < kNumLayers; ++i) {
layers[i].transform = make_span(samplers_[i].locals);
layers[i].weight = samplers_[i].weight_setting;
// Set per-joint weights for the partially blended layer.
layers[i].joint_weights = make_span(samplers_[i].joint_weights);
}
// Setups blending job.
ozz::animation::BlendingJob blend_job;
blend_job.threshold = threshold_;
blend_job.layers = layers;
blend_job.rest_pose = skeleton_.joint_rest_poses();
blend_job.output = make_span(blended_locals_);
// Blends.
if (!blend_job.Run()) {
return false;
}
// Converts from local space to model space matrices.
// Gets the output of the blending stage, and converts it to model space.
// Setup local-to-model conversion job.
ozz::animation::LocalToModelJob ltm_job;
ltm_job.skeleton = &skeleton_;
ltm_job.input = make_span(blended_locals_);
ltm_job.output = make_span(models_);
// Run ltm job.
if (!ltm_job.Run()) {
return false;
}
return true;
}
// Samples animation, transforms to model space and renders.
virtual bool OnDisplay(ozz::sample::Renderer* _renderer) {
return _renderer->DrawPosture(skeleton_, make_span(models_),
ozz::math::Float4x4::identity());
}
virtual bool OnInitialize() {
// Reading skeleton.
if (!ozz::sample::LoadSkeleton(OPTIONS_skeleton, &skeleton_)) {
return false;
}
const int num_joints = skeleton_.num_joints();
const int num_soa_joints = skeleton_.num_soa_joints();
// Reading animations.
const char* filenames[] = {OPTIONS_lower_body_animation,
OPTIONS_upper_body_animation};
for (int i = 0; i < kNumLayers; ++i) {
Sampler& sampler = samplers_[i];
if (!ozz::sample::LoadAnimation(filenames[i], &sampler.animation)) {
return false;
}
// Allocates sampler runtime buffers.
sampler.locals.resize(num_soa_joints);
// Allocates per-joint weights used for the partial animation. Note that
// this is a Soa structure.
sampler.joint_weights.resize(num_soa_joints);
// Allocates a context that matches animation requirements.
sampler.context.Resize(num_joints);
}
// Default weight settings.
Sampler& lower_body_sampler = samplers_[kLowerBody];
lower_body_sampler.weight_setting = 1.f;
lower_body_sampler.joint_weight_setting = 0.f;
Sampler& upper_body_sampler = samplers_[kUpperBody];
upper_body_sampler.weight_setting = 1.f;
upper_body_sampler.joint_weight_setting = 1.f;
// Allocates local space runtime buffers of blended data.
blended_locals_.resize(num_soa_joints);
// Allocates model space runtime buffers of blended data.
models_.resize(num_joints);
// Finds the "Spine1" joint in the joint hierarchy.
upper_body_root_ = FindJoint(skeleton_, "Spine1");
if (upper_body_root_ < 0) {
return false;
}
SetupPerJointWeights();
return true;
}
// Helper functor used to set weights while traversing joints hierarchy.
struct WeightSetupIterator {
WeightSetupIterator(ozz::vector<ozz::math::SimdFloat4>* _weights,
float _weight_setting)
: weights(_weights), weight_setting(_weight_setting) {}
void operator()(int _joint, int) {
ozz::math::SimdFloat4& soa_weight = weights->at(_joint / 4);
soa_weight = ozz::math::SetI(
soa_weight, ozz::math::simd_float4::Load1(weight_setting),
_joint % 4);
}
ozz::vector<ozz::math::SimdFloat4>* weights;
float weight_setting;
};
void SetupPerJointWeights() {
// Setup partial animation mask. This mask is defined by a weight_setting
// assigned to each joint of the hierarchy. Joint to disable are set to a
// weight_setting of 0.f, and enabled joints are set to 1.f.
// Per-joint weights of lower and upper body layers have opposed values
// (weight_setting and 1 - weight_setting) in order for a layer to select
// joints that are rejected by the other layer.
Sampler& lower_body_sampler = samplers_[kLowerBody];
Sampler& upper_body_sampler = samplers_[kUpperBody];
// Disables all joints: set all weights to 0.
for (int i = 0; i < skeleton_.num_soa_joints(); ++i) {
lower_body_sampler.joint_weights[i] = ozz::math::simd_float4::one();
upper_body_sampler.joint_weights[i] = ozz::math::simd_float4::zero();
}
// Sets the weight_setting of all the joints children of the lower and upper
// body weights. Note that they are stored in SoA format.
WeightSetupIterator lower_it(&lower_body_sampler.joint_weights,
lower_body_sampler.joint_weight_setting);
ozz::animation::IterateJointsDF(skeleton_, lower_it, upper_body_root_);
WeightSetupIterator upper_it(&upper_body_sampler.joint_weights,
upper_body_sampler.joint_weight_setting);
ozz::animation::IterateJointsDF(skeleton_, upper_it, upper_body_root_);
}
virtual void OnDestroy() {}
virtual bool OnGui(ozz::sample::ImGui* _im_gui) {
// Exposes blending parameters.
{
static bool open = true;
ozz::sample::ImGui::OpenClose oc(_im_gui, "Blending parameters", &open);
if (open) {
char label[64];
static bool automatic = true;
_im_gui->DoCheckBox("Use automatic blending settings", &automatic);
static float coeff = 1.f; // All power to the partial animation.
std::snprintf(label, sizeof(label), "Upper body weight: %.2f", coeff);
_im_gui->DoSlider(label, 0.f, 1.f, &coeff, 1.f, automatic);
Sampler& lower_body_sampler = samplers_[kLowerBody];
Sampler& upper_body_sampler = samplers_[kUpperBody];
if (automatic) {
// Blending values are forced when "automatic" mode is selected.
lower_body_sampler.weight_setting = 1.f;
lower_body_sampler.joint_weight_setting = 1.f - coeff;
upper_body_sampler.weight_setting = 1.f;
upper_body_sampler.joint_weight_setting = coeff;
}
_im_gui->DoLabel("Manual settings:");
_im_gui->DoLabel("Lower body layer:");
std::snprintf(label, sizeof(label), "Layer weight: %.2f",
lower_body_sampler.weight_setting);
_im_gui->DoSlider(label, 0.f, 1.f, &lower_body_sampler.weight_setting,
1.f, !automatic);
std::snprintf(label, sizeof(label), "Joints weight: %.2f",
lower_body_sampler.joint_weight_setting);
_im_gui->DoSlider(label, 0.f, 1.f,
&lower_body_sampler.joint_weight_setting, 1.f,
!automatic);
_im_gui->DoLabel("Upper body layer:");
std::snprintf(label, sizeof(label), "Layer weight: %.2f",
upper_body_sampler.weight_setting);
_im_gui->DoSlider(label, 0.f, 1.f, &upper_body_sampler.weight_setting,
1.f, !automatic);
std::snprintf(label, sizeof(label), "Joints weight: %.2f",
upper_body_sampler.joint_weight_setting);
_im_gui->DoSlider(label, 0.f, 1.f,
&upper_body_sampler.joint_weight_setting, 1.f,
!automatic);
_im_gui->DoLabel("Global settings:");
std::snprintf(label, sizeof(label), "Threshold: %.2f", threshold_);
_im_gui->DoSlider(label, .01f, 1.f, &threshold_);
SetupPerJointWeights();
}
}
// Exposes selection of the root of the partial blending hierarchy.
{
static bool open = true;
ozz::sample::ImGui::OpenClose oc(_im_gui, "Root", &open);
if (open && skeleton_.num_joints() != 0) {
_im_gui->DoLabel("Root of the upper body hierarchy:",
ozz::sample::ImGui::kLeft, false);
char label[64];
std::snprintf(label, sizeof(label), "%s (%d)",
skeleton_.joint_names()[upper_body_root_],
upper_body_root_);
if (_im_gui->DoSlider(label, 0, skeleton_.num_joints() - 1,
&upper_body_root_)) {
SetupPerJointWeights();
}
}
}
// Exposes animations runtime playback controls.
{
static bool oc_open = true;
ozz::sample::ImGui::OpenClose oc(_im_gui, "Animation control", &oc_open);
if (oc_open) {
static bool open[kNumLayers] = {true, true};
const char* oc_names[kNumLayers] = {"Lower body animation",
"Upper body animation"};
for (int i = 0; i < kNumLayers; ++i) {
Sampler& sampler = samplers_[i];
ozz::sample::ImGui::OpenClose loc(_im_gui, oc_names[i], nullptr);
if (open[i]) {
sampler.controller.OnGui(sampler.animation, _im_gui);
}
}
}
}
return true;
}
virtual void GetSceneBounds(ozz::math::Box* _bound) const {
ozz::sample::ComputePostureBounds(make_span(models_), _bound);
}
private:
// Runtime skeleton.
ozz::animation::Skeleton skeleton_;
// The number of layers to blend.
enum {
kLowerBody = 0,
kUpperBody = 1,
kNumLayers = 2,
};
// Sampler structure contains all the data required to sample a single
// animation.
struct Sampler {
// Constructor, default initialization.
Sampler() : weight_setting(1.f), joint_weight_setting(1.f) {}
// Playback animation controller. This is a utility class that helps with
// controlling animation playback time.
ozz::sample::PlaybackController controller;
// Blending weight_setting for the layer.
float weight_setting;
// Blending weight_setting setting of the joints of this layer that are
// affected
// by the masking.
float joint_weight_setting;
// Runtime animation.
ozz::animation::Animation animation;
// Sampling context.
ozz::animation::SamplingJob::Context context;
// Buffer of local transforms as sampled from animation_.
ozz::vector<ozz::math::SoaTransform> locals;
// Per-joint weights used to define the partial animation mask. Allows to
// select which joints are considered during blending, and their individual
// weight_setting.
ozz::vector<ozz::math::SimdFloat4> joint_weights;
} samplers_[kNumLayers]; // kNumLayers animations to blend.
// Index of the joint at the base of the upper body hierarchy.
int upper_body_root_;
// Blending job rest pose threshold.
float threshold_;
// Buffer of local transforms which stores the blending result.
ozz::vector<ozz::math::SoaTransform> blended_locals_;
// Buffer of model space matrices. These are computed by the local-to-model
// job after the blending stage.
ozz::vector<ozz::math::Float4x4> models_;
};
int main(int _argc, const char** _argv) {
const char* title = "Ozz-animation sample: Partial animations blending";
return PartialBlendSampleApplication().Run(_argc, _argv, "1.0", title);
}
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