AnimTestbed/src/SkinnedMesh.cc

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//
// Created by martin on 12.11.21.
//
#include "SkinnedMesh.h"
#include <HandmadeMath.h>
#include <imgui.h>
SkinnedMesh::~SkinnedMesh() {
while (m_animations.size() > 0) {
ozz::animation::Animation* animation_ptr =
m_animations[m_animations.size() - 1];
delete animation_ptr;
m_animations.pop_back();
}
}
bool SkinnedMesh::LoadSkeleton(const char* filename) {
// const char* skeleton_file = "../media/skeleton.ozz";
const char* skeleton_file = "../media/MixamoYBot-skeleton.ozz";
assert(filename);
ozz::log::Out() << "Loading skeleton archive " << filename << "."
<< std::endl;
ozz::io::File file(filename, "rb");
if (!file.opened()) {
ozz::log::Err() << "Failed to open skeleton file " << filename << "."
<< std::endl;
return false;
}
ozz::io::IArchive archive(&file);
if (!archive.TestTag<ozz::animation::Skeleton>()) {
ozz::log::Err() << "Failed to load skeleton instance from file " << filename
<< "." << std::endl;
return false;
}
// Once the tag is validated, reading cannot fail.
archive >> m_skeleton;
const int num_soa_joints = m_skeleton.num_soa_joints();
const int num_joints = m_skeleton.num_joints();
m_local_matrices.resize(num_soa_joints);
m_model_matrices.resize(num_joints);
m_cache.Resize(num_joints);
std::cout << "Successfully loaded " << skeleton_file
<< " (soa: " << num_soa_joints << ", joints: " << num_joints << ")"
<< std::endl;
return true;
}
bool SkinnedMesh::LoadAnimation(const char* filename) {
ozz::animation::Animation* animation_ptr = new ozz::animation::Animation();
assert(filename);
ozz::log::Out() << "Loading animation archive: " << filename << "."
<< std::endl;
ozz::io::File file(filename, "rb");
if (!file.opened()) {
ozz::log::Err() << "Failed to open animation file " << filename << "."
<< std::endl;
return false;
}
ozz::io::IArchive archive(&file);
if (!archive.TestTag<ozz::animation::Animation>()) {
ozz::log::Err() << "Failed to load animation instance from file "
<< filename << "." << std::endl;
return false;
}
// Once the tag is validated, reading cannot fail.
archive >> *animation_ptr;
m_animations.push_back(animation_ptr);
m_animation_names.push_back(filename);
m_animation_sync_track.push_back(SyncTrack());
return true;
}
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void SkinnedMesh::SetCurrentAnimation(int index) {
if (index < 0 || index >= m_animations.size()) {
ozz::log::Err() << "Invalid animation index " << index << " valid range: ["
<< 0 << ", " << m_animations.size() << "]'" << std::endl;
}
m_current_animation = m_animations[index];
}
void SkinnedMesh::CalcModelMatrices() {
// convert joint matrices from local to model space
ozz::animation::LocalToModelJob ltm_job;
ltm_job.skeleton = &m_skeleton;
ltm_job.input = make_span(m_local_matrices);
ltm_job.output = make_span(m_model_matrices);
ltm_job.Run();
}
void SkinnedMesh::DrawSkeleton() {}
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void SkinnedMesh::DrawDebugUi() {
ImGui::Begin("SkinnedMesh");
ImGui::Text("Animations");
const char* items[255] = {0};
static int selected = -1;
for (int i = 0; i < m_animations.size(); i++) {
items[i] = m_animation_names[i].c_str();
}
ImGui::Combo("Animation", &selected, items, m_animations.size());
ImGui::Text("Sync Track");
if (selected >= 0 && selected < m_animations.size()) {
m_animation_sync_track[selected].DrawDebugUi();
m_override_anim = selected;
ImGui::Checkbox("Override Animation", &m_sync_track_override);
if (m_sync_track_override) {
ImGui::SliderFloat("Ratio", &m_override_ratio, 0.f, 1.f);
ozz::animation::SamplingJob sampling_job;
sampling_job.animation = m_animations[selected];
sampling_job.cache = &m_cache;
sampling_job.ratio = m_override_ratio;
sampling_job.output = make_span(m_local_matrices);
if (!sampling_job.Run()) {
ozz::log::Err() << "Error sampling animation." << std::endl;
}
}
}
ImGui::End();
}