AnimTestbed/tests/AnimGraphResourceTests.cc

//
// Created by martin on 04.02.22.
//

#include "AnimGraph/AnimGraphBlendTree.h"
#include "AnimGraph/AnimGraphEditor.h"
#include "AnimGraph/AnimGraphNodes.h"
#include "AnimGraph/AnimGraphResource.h"
#include "catch.hpp"
#include "ozz/base/io/archive.h"
#include "ozz/base/io/stream.h"
#include "ozz/base/log.h"

class SimpleAnimSamplerGraphResource {
 protected:
  AnimGraphResource graph_resource;
  BlendTreeResource* blend_tree_resource = nullptr;
  size_t walk_node_index = -1;
  AnimNodeResource* walk_node = nullptr;

 public:
  SimpleAnimSamplerGraphResource() {
    graph_resource.m_name = "AnimSamplerBlendTree";
    graph_resource.m_node_type_name = "BlendTree";
    graph_resource.m_graph_type_name = "BlendTree";

    blend_tree_resource = &graph_resource.m_blend_tree_resource;
    blend_tree_resource->InitGraphConnectors();

    // Prepare graph inputs and outputs
    blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    walk_node_index = blend_tree_resource->m_nodes.size() - 1;

    walk_node = blend_tree_resource->m_nodes[walk_node_index];
    walk_node->m_name = "WalkAnim";
    walk_node->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/Walking-loop.ozz"));

    AnimNodeResource* graph_node = blend_tree_resource->GetGraphOutputNode();
    graph_node->m_socket_accessor->RegisterInput<AnimData>(
        "GraphOutput",
        nullptr);

    blend_tree_resource->ConnectSockets(
        walk_node,
        "Output",
        blend_tree_resource->GetGraphOutputNode(),
        "GraphOutput");
  }
};

class Blend2GraphResource {
 protected:
  AnimGraphResource graph_resource;
  BlendTreeResource* blend_tree_resource = nullptr;
  size_t walk_node_index = -1;
  size_t run_node_index = -1;
  size_t blend_node_index = -1;
  AnimNodeResource* walk_node = nullptr;
  AnimNodeResource* run_node = nullptr;
  AnimNodeResource* blend_node = nullptr;

 public:
  Blend2GraphResource() {
    graph_resource.m_name = "WalkRunBlendGraph";
    graph_resource.m_node_type_name = "BlendTree";
    graph_resource.m_graph_type_name = "BlendTree";

    blend_tree_resource = &graph_resource.m_blend_tree_resource;
    blend_tree_resource->InitGraphConnectors();

    // Prepare graph inputs and outputs
    blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    walk_node_index = blend_tree_resource->m_nodes.size() - 1;

    blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    run_node_index = blend_tree_resource->m_nodes.size() - 1;

    blend_tree_resource->m_nodes.push_back(AnimNodeResourceFactory("Blend2"));
    blend_node_index = blend_tree_resource->m_nodes.size() - 1;

    walk_node = blend_tree_resource->m_nodes[walk_node_index];
    walk_node->m_name = "WalkAnim";
    walk_node->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/Walking-loop.ozz"));
    run_node = blend_tree_resource->m_nodes[run_node_index];
    run_node->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/Running0-loop.ozz"));
    run_node->m_name = "RunAnim";
    blend_node = blend_tree_resource->m_nodes[blend_node_index];
    blend_node->m_name = "BlendWalkRun";

    AnimNodeResource* graph_node = blend_tree_resource->GetGraphOutputNode();
    graph_node->m_socket_accessor->RegisterInput<AnimData>(
        "GraphOutput",
        nullptr);

    REQUIRE(graph_node->m_socket_accessor->m_inputs.size() == 1);
    REQUIRE(blend_node->m_socket_accessor->GetInputIndex("Input0") == 0);
    REQUIRE(blend_node->m_socket_accessor->GetInputIndex("Input1") == 1);
    blend_node->m_socket_accessor->SetInputValue("Weight", 0.123f);

    blend_tree_resource
        ->ConnectSockets(walk_node, "Output", blend_node, "Input0");
    blend_tree_resource
        ->ConnectSockets(run_node, "Output", blend_node, "Input1");
    blend_tree_resource->ConnectSockets(
        blend_node,
        "Output",
        blend_tree_resource->GetGraphOutputNode(),
        "GraphOutput");
  }
};

//
// Used for tests with a BlendTree within a BlendTree
//
//   +-----------Parent BlendTree-------------+
//   |                                        |
//   |           +-----Embd Btree---+         |
//   |  AnmSmpl--+-\                |         |
//   |           |  \-SpdScale------+--Out    |
//   |           |------------------+         |
//   |                                        |
//   +----------------------------------------+
//
class EmbeddedBlendTreeGraphResource {
 protected:
  AnimGraphResource parent_graph_resource;
  BlendTreeResource* parent_blend_tree_resource = nullptr;

  AnimGraphResource* embedded_graph = nullptr;
  BlendTreeResource* embedded_blend_tree_resource = nullptr;

  size_t walk_node_index = -1;
  AnimNodeResource* walk_node_resource = nullptr;
  size_t embedded_blend_tree_node_index = -1;
  size_t embedded_speed_scale_index = -1;

 public:
  EmbeddedBlendTreeGraphResource() {
    parent_graph_resource.m_name = "ParentBlendTree";
    parent_graph_resource.m_graph_type_name = "BlendTree";
    parent_graph_resource.m_node_type_name = "BlendTree";

    parent_blend_tree_resource = &parent_graph_resource.m_blend_tree_resource;
    parent_blend_tree_resource->Reset();
    parent_blend_tree_resource->InitGraphConnectors();

    // Setup parent outputs
    AnimNodeResource* parent_blend_tree_outputs =
        parent_blend_tree_resource->GetGraphOutputNode();
    parent_blend_tree_outputs->m_socket_accessor->RegisterInput<AnimData>(
        "Output",
        nullptr);

    // Parent AnimSampler
    parent_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    walk_node_index = parent_blend_tree_resource->m_nodes.size() - 1;

    walk_node_resource = parent_blend_tree_resource->m_nodes[walk_node_index];
    walk_node_resource->m_name = "WalkAnim";
    walk_node_resource->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/Walking-loop.ozz"));

    //
    // Embedded Tree
    //
    parent_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("BlendTree"));
    embedded_blend_tree_node_index =
        parent_blend_tree_resource->m_nodes.size() - 1;
    embedded_graph = dynamic_cast<AnimGraphResource*>(
        parent_blend_tree_resource->m_nodes.back());
    embedded_graph->m_name = "EmbeddedBlendTree";
    embedded_graph->m_node_type_name = "BlendTree";
    embedded_graph->m_graph_type_name = "BlendTree";
    embedded_blend_tree_resource = &embedded_graph->m_blend_tree_resource;

    // Embedded: outputs
    AnimNodeResource* embedded_outputs =
        embedded_blend_tree_resource->GetGraphOutputNode();
    embedded_outputs->m_socket_accessor->RegisterInput<AnimData>(
        "AnimOutput",
        nullptr);

    // Embedded: inputs
    AnimNodeResource* embedded_inputs =
        embedded_blend_tree_resource->GetGraphInputNode();
    embedded_inputs->m_socket_accessor->RegisterOutput<AnimData>(
        "AnimInput",
        nullptr);

    // Embedded: SpeedScale node
    embedded_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("SpeedScale"));
    embedded_speed_scale_index =
        embedded_blend_tree_resource->m_nodes.size() - 1;
    AnimNodeResource* embedded_speed_scale_resource =
        embedded_blend_tree_resource->m_nodes[embedded_speed_scale_index];
    embedded_speed_scale_resource->m_socket_accessor->SetInputValue(
        "SpeedScale",
        0.1f);

    // Embedded: setup connections
    embedded_blend_tree_resource->ConnectSockets(
        embedded_inputs,
        "AnimInput",
        embedded_speed_scale_resource,
        "Input");
    embedded_blend_tree_resource->ConnectSockets(
        embedded_speed_scale_resource,
        "Output",
        embedded_outputs,
        "AnimOutput");

    // Parent: setup connections
    REQUIRE(parent_blend_tree_resource->ConnectSockets(
        walk_node_resource,
        "Output",
        embedded_graph,
        "AnimInput"));
    REQUIRE(parent_blend_tree_resource->ConnectSockets(
        embedded_graph,
        "AnimOutput",
        parent_blend_tree_outputs,
        "Output"));
  }
};

//
// Used for tests with a BlendTree within a BlendTree
//
//   +-----------Parent BlendTree-------------+
//   |                                        |
//   |           +-----Embd Btree---+         |
//   |  AnmSmpl--+-------\          |        |
//   |           |         Blend2---+--Out
//   |           |  AnmS-/          |         |
//   |           |------------------+         |
//   |                                        |
//   +----------------------------------------+
//
class EmbeddedTreeBlend2GraphResource {
 protected:
  AnimGraphResource parent_graph_resource;
  BlendTreeResource* parent_blend_tree_resource = nullptr;

  AnimGraphResource* embedded_graph = nullptr;
  BlendTreeResource* embedded_blend_tree_resource = nullptr;

  size_t walk_node_index = -1;
  AnimNodeResource* walk_node_resource = nullptr;

  size_t embedded_blend_tree_node_index = -1;
  size_t embedded_blend2_node_index = -1;
  size_t embedded_run_node_index = -1;
  AnimNodeResource* embedded_blend2_node_resource = nullptr;
  AnimNodeResource* embedded_run_node_resource = nullptr;

 public:
  EmbeddedTreeBlend2GraphResource() {
    parent_graph_resource.m_name = "ParentBlendTree";
    parent_graph_resource.m_graph_type_name = "BlendTree";
    parent_graph_resource.m_node_type_name = "BlendTree";

    parent_blend_tree_resource = &parent_graph_resource.m_blend_tree_resource;
    parent_blend_tree_resource->Reset();
    parent_blend_tree_resource->InitGraphConnectors();

    // Setup parent outputs
    AnimNodeResource* parent_blend_tree_outputs =
        parent_blend_tree_resource->GetGraphOutputNode();
    parent_blend_tree_outputs->m_socket_accessor->RegisterInput<AnimData>(
        "Output",
        nullptr);

    // Setup parent inputs
    AnimNodeResource* parent_blend_tree_inputs =
        parent_blend_tree_resource->GetGraphInputNode();
    parent_blend_tree_inputs->m_socket_accessor->RegisterOutput<float>(
        "EmbeddedBlend2Weight",
        nullptr);

    // Parent AnimSampler
    parent_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    walk_node_index = parent_blend_tree_resource->m_nodes.size() - 1;

    walk_node_resource = parent_blend_tree_resource->m_nodes[walk_node_index];
    walk_node_resource->m_name = "WalkAnim";
    walk_node_resource->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/Walking-loop.ozz"));

    //
    // Embedded Tree
    //
    parent_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("BlendTree"));
    embedded_blend_tree_node_index =
        parent_blend_tree_resource->m_nodes.size() - 1;
    embedded_graph = dynamic_cast<AnimGraphResource*>(
        parent_blend_tree_resource->m_nodes.back());
    embedded_graph->m_name = "EmbeddedTreeBlend2GraphResource";
    embedded_graph->m_node_type_name = "BlendTree";
    embedded_graph->m_graph_type_name = "BlendTree";
    embedded_blend_tree_resource = &embedded_graph->m_blend_tree_resource;

    // Embedded: outputs
    AnimNodeResource* embedded_outputs =
        embedded_blend_tree_resource->GetGraphOutputNode();
    embedded_outputs->m_socket_accessor->RegisterInput<AnimData>(
        "AnimOutput",
        nullptr);

    // Embedded: inputs
    AnimNodeResource* embedded_inputs =
        embedded_blend_tree_resource->GetGraphInputNode();
    embedded_inputs->m_socket_accessor->RegisterOutput<AnimData>(
        "AnimInput",
        nullptr);
    embedded_inputs->m_socket_accessor->RegisterOutput<float>(
        "BlendWeight",
        nullptr);

    // Embedded nodes
    embedded_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("Blend2"));
    embedded_blend2_node_index =
        embedded_blend_tree_resource->m_nodes.size() - 1;

    embedded_blend_tree_resource->m_nodes.push_back(
        AnimNodeResourceFactory("AnimSampler"));
    embedded_run_node_index = embedded_blend_tree_resource->m_nodes.size() - 1;

    // Configure node resources
    embedded_blend2_node_resource =
        embedded_blend_tree_resource->m_nodes[embedded_blend2_node_index];
    embedded_blend2_node_resource->m_socket_accessor->SetInputValue(
        "Weight",
        0.1f);

    embedded_run_node_resource =
        embedded_blend_tree_resource->m_nodes[embedded_run_node_index];
    embedded_run_node_resource->m_name = "RunAnim";
    embedded_run_node_resource->m_socket_accessor->SetPropertyValue(
        "Filename",
        std::string("media/RunningSlow-loop.ozz"));

    // Embedded: setup connections
    REQUIRE(embedded_blend_tree_resource->ConnectSockets(
        embedded_inputs,
        "AnimInput",
        embedded_blend2_node_resource,
        "Input0"));
    REQUIRE(embedded_blend_tree_resource->ConnectSockets(
        embedded_run_node_resource,
        "Output",
        embedded_blend2_node_resource,
        "Input1"));
    REQUIRE(embedded_blend_tree_resource->ConnectSockets(
        embedded_blend2_node_resource,
        "Output",
        embedded_blend_tree_resource->GetGraphOutputNode(),
        "AnimOutput"));
    REQUIRE(embedded_blend_tree_resource->ConnectSockets(
        embedded_inputs,
        "BlendWeight",
        embedded_blend2_node_resource,
        "Weight"));

    // Parent: setup connections
    REQUIRE(parent_blend_tree_resource->ConnectSockets(
        walk_node_resource,
        "Output",
        embedded_graph,
        "AnimInput"));
    REQUIRE(parent_blend_tree_resource->ConnectSockets(
        embedded_graph,
        "AnimOutput",
        parent_blend_tree_outputs,
        "Output"));
    REQUIRE(parent_blend_tree_resource->ConnectSockets(
        parent_blend_tree_inputs,
        "EmbeddedBlend2Weight",
        embedded_graph,
        "BlendWeight"));
  }
};

bool load_skeleton(ozz::animation::Skeleton& skeleton, const char* filename) {
  assert(filename);
  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 >> skeleton;

  return true;
}

TEST_CASE("InputAttributeConversion", "[AnimGraphResource]") {
  int node_id = 3321;
  int input_index = 221;
  int output_index = 125;
  int parsed_node_id;
  int parsed_input_index;
  int parsed_output_index;

  int attribute_id = GenerateInputAttributeId(node_id, input_index);
  SplitInputAttributeId(attribute_id, &parsed_node_id, &parsed_input_index);
  CHECK(node_id == parsed_node_id);
  CHECK(input_index == parsed_input_index);

  attribute_id = GenerateOutputAttributeId(node_id, output_index);
  SplitOutputAttributeId(attribute_id, &parsed_node_id, &parsed_output_index);
  CHECK(node_id == parsed_node_id);
  CHECK(output_index == parsed_output_index);
}

TEST_CASE_METHOD(
    SimpleAnimSamplerGraphResource,
    "SimpleAnimSamplerGraphResource saving and loading results in same "
    "resource",
    "[SimpleAnimSamplerGraphResource]") {
  graph_resource.SaveToFile("TestGraphAnimSamplerBlendTree.json");

  AnimGraphResource graph_resource_loaded;
  graph_resource_loaded.LoadFromFile("TestGraphAnimSamplerBlendTree.json");

  REQUIRE(
      graph_resource.m_graph_type_name
      == graph_resource_loaded.m_graph_type_name);
  REQUIRE(graph_resource.m_name == graph_resource_loaded.m_name);

  BlendTreeResource* blend_tree_resource_loaded =
      &graph_resource_loaded.m_blend_tree_resource;

  REQUIRE(
      blend_tree_resource->m_nodes.size()
      == blend_tree_resource_loaded->m_nodes.size());
  for (size_t i = 0; i < blend_tree_resource->m_nodes.size(); i++) {
    const AnimNodeResource* node = blend_tree_resource->m_nodes[i];
    const AnimNodeResource* node_loaded =
        blend_tree_resource_loaded->m_nodes[i];

    REQUIRE(node->m_name == node_loaded->m_name);
    REQUIRE(node->m_node_type_name == node_loaded->m_node_type_name);
  }

  REQUIRE(
      blend_tree_resource->m_connections.size()
      == blend_tree_resource_loaded->m_connections.size());
  for (size_t i = 0; i < blend_tree_resource->m_connections.size(); i++) {
    const BlendTreeConnectionResource& connection =
        blend_tree_resource->m_connections[i];
    const BlendTreeConnectionResource& connection_loaded =
        blend_tree_resource_loaded->m_connections[i];

    REQUIRE(
        connection.source_node_index == connection_loaded.source_node_index);
    REQUIRE(
        connection.source_socket_name == connection_loaded.source_socket_name);
    REQUIRE(
        connection.target_node_index == connection_loaded.target_node_index);
    REQUIRE(
        connection.target_socket_name == connection_loaded.target_socket_name);
  }
}

TEST_CASE_METHOD(
    SimpleAnimSamplerGraphResource,
    "SimpleAnimSamplerGraphResource emulated evaluation",
    "[SimpleAnimSamplerGraphResource]") {
  AnimGraphBlendTree anim_graph_blend_tree;
  graph_resource.CreateBlendTreeInstance(anim_graph_blend_tree);
  AnimGraphContext graph_context;

  ozz::animation::Skeleton skeleton;
  REQUIRE(load_skeleton(skeleton, "media/skeleton.ozz"));
  graph_context.m_skeleton = &skeleton;

  REQUIRE(anim_graph_blend_tree.Init(graph_context));

  REQUIRE(anim_graph_blend_tree.m_nodes.size() == 3);
  REQUIRE(
      anim_graph_blend_tree.m_nodes[0]->m_node_type_name == "BlendTreeSockets");
  REQUIRE(
      anim_graph_blend_tree.m_nodes[1]->m_node_type_name == "BlendTreeSockets");
  REQUIRE(anim_graph_blend_tree.m_nodes[2]->m_node_type_name == "AnimSampler");

  // connections within the graph
  AnimSamplerNode* anim_sampler_walk =
      dynamic_cast<AnimSamplerNode*>(anim_graph_blend_tree.m_nodes[2]);

  BlendTreeSocketNode* graph_output_node =
      dynamic_cast<BlendTreeSocketNode*>(anim_graph_blend_tree.m_nodes[0]);

  // check node input dependencies
  size_t anim_sampler_index =
      anim_graph_blend_tree.GetAnimNodeIndex(anim_sampler_walk);

  REQUIRE(
      anim_graph_blend_tree.m_node_output_connections[anim_sampler_index].size()
      == 1);
  CHECK(
      anim_graph_blend_tree.m_node_output_connections[anim_sampler_index][0]
          .m_target_node
      == graph_output_node);

  // Ensure animation sampler nodes use the correct files
  REQUIRE(anim_sampler_walk->m_filename == "media/Walking-loop.ozz");
  REQUIRE(anim_sampler_walk->m_animation != nullptr);

  // Ensure that outputs are properly propagated.
  AnimData output;
  output.m_local_matrices.resize(skeleton.num_soa_joints());
  anim_graph_blend_tree.SetOutput("GraphOutput", &output);
  REQUIRE(anim_sampler_walk->o_output == &output);

  WHEN("Emulating Graph Evaluation") {
    CHECK(anim_graph_blend_tree.m_anim_data_allocator.size() == 0);
    anim_sampler_walk->Evaluate(graph_context);
  }

  graph_context.freeAnimations();
}

//
// Checks that node const inputs are properly set.
//
TEST_CASE("AnimSamplerSpeedScaleGraph", "[AnimGraphResource]") {
  AnimGraphResource graph_resource;
  graph_resource.m_name = "AnimSamplerSpeedScaleGraph";
  graph_resource.m_graph_type_name = "BlendTree";

  BlendTreeResource& blend_tree_resource = graph_resource.m_blend_tree_resource;
  blend_tree_resource.Reset();
  blend_tree_resource.InitGraphConnectors();

  // Prepare graph inputs and outputs
  blend_tree_resource.m_nodes.push_back(AnimNodeResourceFactory("AnimSampler"));
  size_t walk_node_index = blend_tree_resource.m_nodes.size() - 1;

  blend_tree_resource.m_nodes.push_back(AnimNodeResourceFactory("SpeedScale"));
  size_t speed_scale_node_index = blend_tree_resource.m_nodes.size() - 1;

  AnimNodeResource* walk_node = blend_tree_resource.m_nodes[walk_node_index];
  walk_node->m_name = "WalkAnim";
  walk_node->m_socket_accessor->SetPropertyValue(
      "Filename",
      std::string("media/Walking-loop.ozz"));

  AnimNodeResource* speed_scale_node =
      blend_tree_resource.m_nodes[speed_scale_node_index];
  speed_scale_node->m_name = "SpeedScale";
  float speed_scale_value = 1.35f;
  speed_scale_node->m_socket_accessor->SetInputValue(
      "SpeedScale",
      speed_scale_value);

  AnimNodeResource* graph_node = blend_tree_resource.GetGraphOutputNode();
  graph_node->m_socket_accessor->RegisterInput<AnimData>(
      "GraphOutput",
      nullptr);

  blend_tree_resource
      .ConnectSockets(walk_node, "Output", speed_scale_node, "Input");

  blend_tree_resource.ConnectSockets(
      speed_scale_node,
      "Output",
      blend_tree_resource.GetGraphOutputNode(),
      "GraphOutput");

  graph_resource.SaveToFile(
      "TestGraphAnimSamplerSpeedScaleGraph.animgraph.json");
  AnimGraphResource graph_resource_loaded;
  graph_resource_loaded.LoadFromFile(
      "TestGraphAnimSamplerSpeedScaleGraph.animgraph.json");

  BlendTreeResource& blend_tree_resource_loaded =
      graph_resource_loaded.m_blend_tree_resource;

  Socket* speed_scale_resource_loaded_input =
      blend_tree_resource_loaded.m_nodes[speed_scale_node_index]
          ->m_socket_accessor->GetInputSocket("SpeedScale");
  REQUIRE(speed_scale_resource_loaded_input != nullptr);

  REQUIRE_THAT(
      speed_scale_resource_loaded_input->m_value.float_value,
      Catch::Matchers::WithinAbs(speed_scale_value, 0.1));

  AnimGraphBlendTree blend_tree;
  graph_resource_loaded.CreateBlendTreeInstance(blend_tree);

  REQUIRE_THAT(
      *dynamic_cast<SpeedScaleNode*>(blend_tree.m_nodes[speed_scale_node_index])
           ->i_speed_scale,
      Catch::Matchers::WithinAbs(speed_scale_value, 0.1));
}

TEST_CASE_METHOD(
    Blend2GraphResource,
    "Blend2GraphResource saving and loading results in same resource",
    "[Blend2GraphResource]") {
  graph_resource.SaveToFile("TestGraphBlend2Graph.animgraph.json");

  AnimGraphResource graph_resource_loaded;
  graph_resource_loaded.LoadFromFile("TestGraphBlend2Graph.animgraph.json");

  REQUIRE(
      graph_resource.m_graph_type_name
      == graph_resource_loaded.m_graph_type_name);
  REQUIRE(graph_resource.m_name == graph_resource_loaded.m_name);

  BlendTreeResource* blend_tree_resource_loaded =
      &graph_resource_loaded.m_blend_tree_resource;

  REQUIRE(
      blend_tree_resource->m_nodes.size()
      == blend_tree_resource_loaded->m_nodes.size());
  for (size_t i = 0; i < blend_tree_resource->m_nodes.size(); i++) {
    const AnimNodeResource* node = blend_tree_resource->m_nodes[i];
    const AnimNodeResource* node_loaded =
        blend_tree_resource_loaded->m_nodes[i];

    REQUIRE(node->m_name == node_loaded->m_name);
    REQUIRE(node->m_node_type_name == node_loaded->m_node_type_name);
  }

  REQUIRE(
      blend_tree_resource->m_connections.size()
      == blend_tree_resource_loaded->m_connections.size());
  for (size_t i = 0; i < blend_tree_resource->m_connections.size(); i++) {
    const BlendTreeConnectionResource& connection =
        blend_tree_resource->m_connections[i];
    const BlendTreeConnectionResource& connection_loaded =
        blend_tree_resource_loaded->m_connections[i];

    REQUIRE(
        connection.source_node_index == connection_loaded.source_node_index);
    REQUIRE(
        connection.source_socket_name == connection_loaded.source_socket_name);
    REQUIRE(
        connection.target_node_index == connection_loaded.target_node_index);
    REQUIRE(
        connection.target_socket_name == connection_loaded.target_socket_name);
  }

  // Check that the constant weight of the Blend2 node was properly applied when
  // loading the resource.
  const NodeDescriptor<Blend2Node>* blend2_node_descriptor_loaded =
      dynamic_cast<NodeDescriptor<Blend2Node>*>(
          blend_tree_resource_loaded->m_nodes[blend_node_index]
              ->m_socket_accessor);

  REQUIRE_THAT(
      blend_node->m_socket_accessor->GetInputValue<float>("Weight"),
      Catch::Matchers::WithinAbs(
          blend2_node_descriptor_loaded->GetInputValue<float>("Weight"),
          0.01));
}

TEST_CASE_METHOD(
    Blend2GraphResource,
    "Blend2GraphResource graph unsynced evaluation",
    "[Blend2GraphResource]") {
  AnimGraphBlendTree blend_tree_graph;
  graph_resource.CreateBlendTreeInstance(blend_tree_graph);
  AnimGraphContext graph_context;

  ozz::animation::Skeleton skeleton;
  REQUIRE(load_skeleton(skeleton, "media/skeleton.ozz"));
  graph_context.m_skeleton = &skeleton;

  REQUIRE(blend_tree_graph.Init(graph_context));

  REQUIRE(blend_tree_graph.m_nodes.size() == 5);
  REQUIRE(blend_tree_graph.m_nodes[0]->m_node_type_name == "BlendTreeSockets");
  REQUIRE(blend_tree_graph.m_nodes[1]->m_node_type_name == "BlendTreeSockets");
  REQUIRE(blend_tree_graph.m_nodes[2]->m_node_type_name == "AnimSampler");
  REQUIRE(blend_tree_graph.m_nodes[3]->m_node_type_name == "AnimSampler");
  REQUIRE(blend_tree_graph.m_nodes[4]->m_node_type_name == "Blend2");

  // connections within the graph
  AnimSamplerNode* anim_sampler_walk =
      dynamic_cast<AnimSamplerNode*>(blend_tree_graph.m_nodes[2]);
  AnimSamplerNode* anim_sampler_run =
      dynamic_cast<AnimSamplerNode*>(blend_tree_graph.m_nodes[3]);
  Blend2Node* blend2_instance =
      dynamic_cast<Blend2Node*>(blend_tree_graph.m_nodes[4]);

  // check node input dependencies
  size_t anim_sampler_index0 =
      blend_tree_graph.GetAnimNodeIndex(anim_sampler_walk);
  size_t anim_sampler_index1 =
      blend_tree_graph.GetAnimNodeIndex(anim_sampler_run);
  size_t blend_index = blend_tree_graph.GetAnimNodeIndex(blend2_instance);

  REQUIRE(blend_tree_graph.m_node_input_connections[blend_index].size() == 2);
  CHECK(
      blend_tree_graph.m_node_input_connections[blend_index][0].m_source_node
      == anim_sampler_walk);
  CHECK(
      blend_tree_graph.m_node_input_connections[blend_index][1].m_source_node
      == anim_sampler_run);

  REQUIRE(
      blend_tree_graph.m_node_output_connections[anim_sampler_index0].size()
      == 1);
  CHECK(
      blend_tree_graph.m_node_output_connections[anim_sampler_index0][0]
          .m_target_node
      == blend2_instance);

  REQUIRE(
      blend_tree_graph.m_node_output_connections[anim_sampler_index1].size()
      == 1);
  CHECK(
      blend_tree_graph.m_node_output_connections[anim_sampler_index1][0]
          .m_target_node
      == blend2_instance);

  // Ensure animation sampler nodes use the correct files
  REQUIRE(anim_sampler_walk->m_filename == "media/Walking-loop.ozz");
  REQUIRE(anim_sampler_walk->m_animation != nullptr);

  REQUIRE(anim_sampler_run->m_filename == "media/Running0-loop.ozz");
  REQUIRE(anim_sampler_run->m_animation != nullptr);

  WHEN("Emulating Graph Evaluation") {
    CHECK(blend_tree_graph.m_anim_data_allocator.size() == 0);
    CHECK(blend2_instance->i_input0 == anim_sampler_walk->o_output);
    CHECK(blend2_instance->i_input1 == anim_sampler_run->o_output);

    AnimData* graph_output = static_cast<AnimData*>(
        blend_tree_graph.GetOutputPtr<AnimData>("GraphOutput"));

    CHECK(
        graph_output->m_local_matrices.size()
        == graph_context.m_skeleton->num_soa_joints());

    CHECK(blend2_instance->o_output == graph_output);
  }

  graph_context.freeAnimations();
}

//
// Graph:
//   Outputs:
//     - GraphFloatOutput (float)
//     - GraphVec3Output (Vec3)
//
//   Inputs:
//     - GraphFloatInput (float)
//
//   Nodes:
//     - MathFloatToVec3Node
//
//   Connectivity:
//     GraphFloatInput  -+----------------------> GraphFloatOutput
//                        \-> MathFloatToVec3 --> GraphVec3Output
//
//
TEST_CASE("ResourceSaveLoadMathGraphInputs", "[AnimGraphResource]") {
  AnimGraphResource graph_resource_origin;
  graph_resource_origin.m_name = "TestInputOutputGraph";
  graph_resource_origin.m_graph_type_name = "BlendTree";

  BlendTreeResource& blend_tree_resource =
      graph_resource_origin.m_blend_tree_resource;
  blend_tree_resource.Reset();
  blend_tree_resource.InitGraphConnectors();

  // Prepare graph inputs and outputs
  blend_tree_resource.m_nodes.push_back(
      AnimNodeResourceFactory("MathFloatToVec3Node"));
  size_t float_to_vec3_node_index = blend_tree_resource.m_nodes.size() - 1;

  AnimNodeResource* graph_output_node =
      blend_tree_resource.GetGraphOutputNode();
  graph_output_node->m_socket_accessor->RegisterInput<float>(
      "GraphFloatOutput",
      nullptr);
  graph_output_node->m_socket_accessor->RegisterInput<Vec3>(
      "GraphVec3Output",
      nullptr);

  AnimNodeResource* graph_input_node_resource =
      blend_tree_resource.GetGraphInputNode();
  graph_input_node_resource->m_socket_accessor->RegisterOutput<float>(
      "GraphFloatInput",
      nullptr);

  // Prepare graph inputs and outputs
  AnimNodeResource* float_to_vec3_node_resource =
      blend_tree_resource.m_nodes[float_to_vec3_node_index];

  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node_resource,
      "GraphFloatInput",
      graph_output_node,
      "GraphFloatOutput"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node_resource,
      "GraphFloatInput",
      float_to_vec3_node_resource,
      "Input0"));
  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node_resource,
      "GraphFloatInput",
      float_to_vec3_node_resource,
      "Input1"));
  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node_resource,
      "GraphFloatInput",
      float_to_vec3_node_resource,
      "Input2"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      float_to_vec3_node_resource,
      "Output",
      graph_output_node,
      "GraphVec3Output"));

  WHEN("Saving and loading graph resource") {
    const char* filename = "TestGraphResourceSaveLoadGraphInputs.json";
    graph_resource_origin.SaveToFile(filename);

    AnimGraphResource graph_resource_loaded;
    graph_resource_loaded.LoadFromFile(filename);

    BlendTreeResource& graph_blend_tree_loaded =
        graph_resource_loaded.m_blend_tree_resource;

    const AnimNodeResource* graph_loaded_output_node =
        graph_blend_tree_loaded.m_nodes[0];
    const AnimNodeResource* graph_loaded_input_node =
        graph_blend_tree_loaded.m_nodes[1];

    THEN("Graph inputs and outputs must be in loaded resource as well.") {
      REQUIRE(
          graph_output_node->m_socket_accessor->m_inputs.size()
          == graph_loaded_output_node->m_socket_accessor->m_inputs.size());

      REQUIRE(
          graph_input_node_resource->m_socket_accessor->m_outputs.size()
          == graph_loaded_input_node->m_socket_accessor->m_outputs.size());

      REQUIRE(
          graph_loaded_input_node->m_socket_accessor->GetOutputSocket(
              "GraphFloatInput")
          != nullptr);

      REQUIRE(
          graph_loaded_output_node->m_socket_accessor->GetInputSocket(
              "GraphFloatOutput")
          != nullptr);
      REQUIRE(
          graph_loaded_output_node->m_socket_accessor->GetInputSocket(
              "GraphVec3Output")
          != nullptr);

      WHEN("Instantiating an AnimGraph") {
        AnimGraphBlendTree blend_tree_node;
        graph_resource_loaded.CreateBlendTreeInstance(blend_tree_node);

        float graph_float_input = 123.456f;
        blend_tree_node.SetInput("GraphFloatInput", &graph_float_input);

        MathFloatToVec3Node* float_to_vec3_node =
            dynamic_cast<MathFloatToVec3Node*>(
                blend_tree_node.m_nodes[float_to_vec3_node_index]);

        CHECK(float_to_vec3_node->i_input0 == &graph_float_input);
        CHECK(float_to_vec3_node->i_input1 == &graph_float_input);
        CHECK(float_to_vec3_node->i_input2 == &graph_float_input);

        AND_WHEN("Evaluating Graph") {
          AnimGraphContext context;
          context.m_graph = nullptr;

          blend_tree_node.Init(context);

          // GraphFloatOutput is directly connected to GraphFloatInput therefore
          // we need to get the pointer here.
          float* graph_float_ptr =
              blend_tree_node.GetOutputPtr<float>("GraphFloatOutput");
          Vec3 graph_vec3_output;
          blend_tree_node.SetOutput("GraphVec3Output", &graph_vec3_output);

          blend_tree_node.UpdateTime(0.f, 0.f);
          blend_tree_node.Evaluate(context);

          THEN("output vector components equal the graph input values") {
            CHECK(graph_float_ptr == &graph_float_input);
            CHECK(graph_vec3_output.v[0] == graph_float_input);
            CHECK(graph_vec3_output.v[1] == graph_float_input);
            CHECK(graph_vec3_output.v[2] == graph_float_input);
          }

          context.freeAnimations();
        }
      }
    }
  }
}

//
// Graph:
//   Input:   float GraphFloatInputSingle
//   Output:  float GraphFloat0Output
//            float GraphFloat1Output
//            float GraphFloat1Output
//   Nodes:   2x Add Node
//   Connections:
//            - Direct GraphFloatInputSingle to GraphFQloat0Output
//            - Remaining wires such that
//              GraphFloat1Output -> GraphFLoatInputSingle * 2
//              GraphFloat1Output -> GraphFLoatInputSingle * 3
//
TEST_CASE("SimpleMathEvaluations", "[AnimGraphResource]") {
  AnimGraphResource graph_resource_origin;
  graph_resource_origin.m_name = "TestSimpleMathGraph";
  graph_resource_origin.m_graph_type_name = "BlendTree";

  BlendTreeResource& blend_tree_resource =
      graph_resource_origin.m_blend_tree_resource;
  blend_tree_resource.Reset();
  blend_tree_resource.InitGraphConnectors();

  // Prepare graph inputs and outputs
  blend_tree_resource.m_nodes.push_back(AnimNodeResourceFactory("MathAddNode"));
  size_t math_add0_node_index = blend_tree_resource.m_nodes.size() - 1;

  blend_tree_resource.m_nodes.push_back(AnimNodeResourceFactory("MathAddNode"));
  size_t math_add1_node_index = blend_tree_resource.m_nodes.size() - 1;

  AnimNodeResource* graph_output_node =
      blend_tree_resource.GetGraphOutputNode();

  graph_output_node->m_socket_accessor->RegisterInput<float>(
      "GraphFloat0Output",
      nullptr);
  graph_output_node->m_socket_accessor->RegisterInput<float>(
      "GraphFloat1Output",
      nullptr);
  graph_output_node->m_socket_accessor->RegisterInput<float>(
      "GraphFloat2Output",
      nullptr);

  AnimNodeResource* graph_input_node = blend_tree_resource.GetGraphInputNode();
  graph_input_node->m_socket_accessor->RegisterOutput<float>(
      "GraphFloatInput",
      nullptr);

  // Prepare graph inputs and outputs
  AnimNodeResource* math_add0_node =
      blend_tree_resource.m_nodes[math_add0_node_index];
  AnimNodeResource* math_add1_node =
      blend_tree_resource.m_nodes[math_add1_node_index];

  // direct output
  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node,
      "GraphFloatInput",
      graph_output_node,
      "GraphFloat0Output"));

  // add0 node
  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node,
      "GraphFloatInput",
      math_add0_node,
      "Input0"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node,
      "GraphFloatInput",
      math_add0_node,
      "Input1"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      math_add0_node,
      "Output",
      graph_output_node,
      "GraphFloat1Output"));

  // add1 node
  REQUIRE(blend_tree_resource.ConnectSockets(
      math_add0_node,
      "Output",
      math_add1_node,
      "Input0"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      graph_input_node,
      "GraphFloatInput",
      math_add1_node,
      "Input1"));

  REQUIRE(blend_tree_resource.ConnectSockets(
      math_add1_node,
      "Output",
      graph_output_node,
      "GraphFloat2Output"));

  WHEN("Saving and loading graph resource") {
    const char* filename = "TestGraphResourceSaveLoadGraphInputs.json";
    graph_resource_origin.SaveToFile(filename);

    AnimGraphResource graph_resource_loaded;
    graph_resource_loaded.LoadFromFile(filename);

    WHEN("Instantiating an AnimGraph") {
      AnimGraphBlendTree blend_tree;
      graph_resource_loaded.CreateBlendTreeInstance(blend_tree);

      float graph_float_input = 123.456f;
      blend_tree.SetInput("GraphFloatInput", &graph_float_input);

      AND_WHEN("Evaluating Graph") {
        AnimGraphContext context;
        context.m_graph = nullptr;

        float float1_output = -1.f;
        float float2_output = -1.f;

        // float0 output is directly connected to the graph input, therefore
        // we have to get a ptr to the input data here.
        float* float0_output_ptr =
            blend_tree.GetOutputPtr<float>("GraphFloat0Output");

        blend_tree.SetOutput("GraphFloat1Output", &float1_output);
        blend_tree.SetOutput("GraphFloat2Output", &float2_output);

        blend_tree.UpdateTime(0.f, 0.f);
        blend_tree.Evaluate(context);

        THEN("output vector components equal the graph input vaulues") {
          CHECK(float0_output_ptr == &graph_float_input);
          CHECK(float1_output == Approx(graph_float_input * 2.f));
          REQUIRE_THAT(
              float2_output,
              Catch::Matchers::WithinAbs(graph_float_input * 3.f, 10));
        }

        context.freeAnimations();
      }
    }
  }
}

//
// Tests whether BlendTree within a BlendTree can be saved and loaded
//
//   +-----------Parent BlendTree-------------+
//   |                                        |
//   |           +-----Embd Btree---+         |
//   |  AnmSmpl--+-\                |         |
//   |           |  \-SpdScale------+--Out    |
//   |           |------------------+         |
//   |                                        |
//   +----------------------------------------+
//
TEST_CASE_METHOD(
    EmbeddedBlendTreeGraphResource,
    "EmbeddedBlendTreeGraphResource saving and loading results in same "
    "resource",
    "[EmbeddedBlendTreeGraphResource]") {
  parent_graph_resource.SaveToFile("TestGraphEmbeddedBlendTree.json");

  AnimGraphResource parent_graph_resource_loaded;
  parent_graph_resource_loaded.LoadFromFile("TestGraphEmbeddedBlendTree.json");

  //
  // Check the loaded parent graph
  //
  CHECK(parent_graph_resource.m_name == parent_graph_resource_loaded.m_name);
  CHECK(
      parent_graph_resource.m_graph_type_name
      == parent_graph_resource_loaded.m_graph_type_name);
  CHECK(
      parent_graph_resource.m_node_type_name
      == parent_graph_resource_loaded.m_node_type_name);

  const BlendTreeResource& parent_blend_tree_resource_loaded =
      parent_graph_resource_loaded.m_blend_tree_resource;

  CHECK(
      parent_blend_tree_resource->m_nodes.size()
      == parent_blend_tree_resource_loaded.m_nodes.size());
  for (size_t i = 0; i < parent_blend_tree_resource->m_nodes.size(); i++) {
    const AnimNodeResource* parent_node =
        parent_blend_tree_resource->m_nodes[i];
    const AnimNodeResource* parent_node_loaded =
        parent_blend_tree_resource_loaded.m_nodes[i];

    CHECK(parent_node->m_name == parent_node_loaded->m_name);
    CHECK(
        parent_node->m_node_type_name == parent_node_loaded->m_node_type_name);
  }

  CHECK(
      parent_blend_tree_resource->m_connections.size()
      == parent_blend_tree_resource_loaded.m_connections.size());
  for (size_t i = 0; i < parent_blend_tree_resource->m_connections.size();
       i++) {
    const BlendTreeConnectionResource& parent_connection =
        parent_blend_tree_resource->m_connections[i];
    const BlendTreeConnectionResource& parent_connection_loaded =
        parent_blend_tree_resource_loaded.m_connections[i];

    CHECK(
        parent_connection.source_node_index
        == parent_connection_loaded.source_node_index);
    CHECK(
        parent_connection.source_socket_name
        == parent_connection_loaded.source_socket_name);
    CHECK(
        parent_connection.target_node_index
        == parent_connection_loaded.target_node_index);
    CHECK(
        parent_connection.target_socket_name
        == parent_connection_loaded.target_socket_name);
  }

  //
  // Check the loaded embedded graph
  //
  REQUIRE(
      parent_blend_tree_resource_loaded.m_nodes[3]->m_node_type_name
      == "BlendTree");

  const AnimGraphResource* embedded_graph_loaded =
      dynamic_cast<AnimGraphResource*>(
          parent_blend_tree_resource_loaded.m_nodes[3]);
  const BlendTreeResource& embedded_blend_tree_resource_loaded =
      embedded_graph_loaded->m_blend_tree_resource;

  CHECK(
      embedded_blend_tree_resource->m_nodes.size()
      == embedded_blend_tree_resource_loaded.m_nodes.size());
  CHECK(
      embedded_blend_tree_resource->m_connections.size()
      == embedded_blend_tree_resource_loaded.m_connections.size());

  for (size_t i = 0; i < embedded_blend_tree_resource->m_nodes.size(); i++) {
    const AnimNodeResource* parent_node =
        embedded_blend_tree_resource->m_nodes[i];
    const AnimNodeResource* parent_node_loaded =
        embedded_blend_tree_resource_loaded.m_nodes[i];

    CHECK(parent_node->m_name == parent_node_loaded->m_name);
    CHECK(
        parent_node->m_node_type_name == parent_node_loaded->m_node_type_name);
  }

  CHECK(
      embedded_blend_tree_resource->m_connections.size()
      == embedded_blend_tree_resource_loaded.m_connections.size());
  for (size_t i = 0; i < embedded_blend_tree_resource->m_connections.size();
       i++) {
    const BlendTreeConnectionResource& embedded_connection =
        embedded_blend_tree_resource->m_connections[i];
    const BlendTreeConnectionResource& embedded_connection_loaded =
        embedded_blend_tree_resource_loaded.m_connections[i];

    CHECK(
        embedded_connection.source_node_index
        == embedded_connection_loaded.source_node_index);
    CHECK(
        embedded_connection.source_socket_name
        == embedded_connection_loaded.source_socket_name);
    CHECK(
        embedded_connection.target_node_index
        == embedded_connection_loaded.target_node_index);
    CHECK(
        embedded_connection.target_socket_name
        == embedded_connection_loaded.target_socket_name);
  }
}

TEST_CASE_METHOD(
    EmbeddedBlendTreeGraphResource,
    "EmbeddedBlendTreeGraphResource instantiation",
    "[EmbeddedBlendTreeGraphResource]") {
  AnimGraphBlendTree blend_tree;

  parent_graph_resource.CreateBlendTreeInstance(blend_tree);
  AnimGraphContext graph_context;

  ozz::animation::Skeleton skeleton;
  REQUIRE(load_skeleton(skeleton, "media/skeleton.ozz"));
  graph_context.m_skeleton = &skeleton;

  blend_tree.Init(graph_context);

  const AnimSamplerNode* walk_node =
      dynamic_cast<AnimSamplerNode*>(blend_tree.m_nodes[walk_node_index]);
  const AnimGraphBlendTree* embedded_blend_tree_node =
      dynamic_cast<AnimGraphBlendTree*>(
          blend_tree.m_nodes[embedded_blend_tree_node_index]);
  const SpeedScaleNode* speed_scale_node = dynamic_cast<SpeedScaleNode*>(
      embedded_blend_tree_node->m_nodes[embedded_speed_scale_index]);

  blend_tree.StartUpdateTick();
  blend_tree.MarkActiveInputs(std::vector<AnimGraphConnection>());
  REQUIRE(embedded_blend_tree_node->m_state == AnimNodeEvalState::Activated);
  REQUIRE(speed_scale_node->m_state == AnimNodeEvalState::Activated);
  REQUIRE(walk_node->m_state == AnimNodeEvalState::Activated);

  float time_last = 0.f;
  float dt = 0.1f;
  blend_tree.UpdateTime(time_last, time_last + dt);
  CHECK(embedded_blend_tree_node->m_state == AnimNodeEvalState::TimeUpdated);
  CHECK(speed_scale_node->m_state == AnimNodeEvalState::TimeUpdated);
  CHECK(walk_node->m_state == AnimNodeEvalState::TimeUpdated);

  CHECK_THAT(
      walk_node->m_time_last,
      Catch::Matchers::WithinAbs(time_last, 0.001));
  CHECK_THAT(
      walk_node->m_time_now,
      Catch::Matchers::WithinAbs(
          time_last + dt * (*speed_scale_node->i_speed_scale),
          0.001));

  blend_tree.Evaluate(graph_context);

  WHEN("Updating the time a second time") {
    // Perform another update
    time_last = time_last + dt;
    dt = 0.3f;
    blend_tree.StartUpdateTick();
    blend_tree.MarkActiveInputs(std::vector<AnimGraphConnection>());
    blend_tree.UpdateTime(time_last, time_last + dt);
    CHECK(embedded_blend_tree_node->m_state == AnimNodeEvalState::TimeUpdated);
    CHECK(speed_scale_node->m_state == AnimNodeEvalState::TimeUpdated);
    CHECK(walk_node->m_state == AnimNodeEvalState::TimeUpdated);

    CHECK_THAT(
        walk_node->m_time_last,
        Catch::Matchers::WithinAbs(
            time_last * (*speed_scale_node->i_speed_scale),
            0.001));
    CHECK_THAT(
        walk_node->m_time_now,
        Catch::Matchers::WithinAbs(
            (time_last + dt) * (*speed_scale_node->i_speed_scale),
            0.001));
  }

  graph_context.freeAnimations();
}

// Here we check two things:
// 1. That nodes of the parent get properly activated by an embedded node.
// 2. That output sockets of nodes in the parent graph can properly be
//    connected to inputs of an embedded node.
TEST_CASE_METHOD(
    EmbeddedTreeBlend2GraphResource,
    "EmbeddedTreeBlend2GraphResource instantiation",
    "[EmbeddedTreeBlend2GraphResource]") {
  AnimGraphBlendTree blend_tree;

  parent_graph_resource.CreateBlendTreeInstance(blend_tree);
  AnimGraphContext graph_context;

  ozz::animation::Skeleton skeleton;
  REQUIRE(load_skeleton(skeleton, "media/skeleton.ozz"));
  graph_context.m_skeleton = &skeleton;

  blend_tree.Init(graph_context);
  const AnimSamplerNode* walk_node =
      dynamic_cast<AnimSamplerNode*>(blend_tree.m_nodes[walk_node_index]);
  AnimGraphBlendTree* embedded_blend_tree_node =
      dynamic_cast<AnimGraphBlendTree*>(
          blend_tree.m_nodes[embedded_blend_tree_node_index]);
  const Blend2Node* embedded_blend2_node = dynamic_cast<Blend2Node*>(
      embedded_blend_tree_node->m_nodes[embedded_blend2_node_index]);
  const AnimSamplerNode* embedded_run_node = dynamic_cast<AnimSamplerNode*>(
      embedded_blend_tree_node->m_nodes[embedded_run_node_index]);

  REQUIRE(walk_node != nullptr);
  REQUIRE(embedded_blend2_node != nullptr);
  REQUIRE(embedded_run_node != nullptr);

  WHEN("Setting blend2 weight within EmbeddedBlendTree") {
    float embedded_blend2_weight = 0.2f;
    embedded_blend_tree_node->SetInput<float>(
        "BlendWeight",
        &embedded_blend2_weight);
    CHECK_THAT(
        *embedded_blend2_node->i_blend_weight,
        Catch::Matchers::WithinAbs(embedded_blend2_weight, 0.001));
  }

  WHEN("Setting blend2 weight on the parent BlendTree") {
    float parent_blend2_weight = 0.4f;
    blend_tree.SetInput<float>("EmbeddedBlend2Weight", &parent_blend2_weight);

    THEN(
        "the embedded blend2 weights points to the address specified in the "
        "parent tree.") {
      CHECK(embedded_blend2_node->i_blend_weight == &parent_blend2_weight);
    }

    WHEN("Setting the blend weight to 0 and marking inputs as active") {
      parent_blend2_weight = 0.f;
      blend_tree.StartUpdateTick();
      blend_tree.MarkActiveInputs(std::vector<AnimGraphConnection>());
      THEN(
          "parent AnimSampler is active and embedded AnimSampler is inactive") {
        CHECK(walk_node->m_state == AnimNodeEvalState::Activated);
        CHECK(embedded_run_node->m_state == AnimNodeEvalState::Deactivated);
      }
    }

    WHEN("Setting the blend weight to 1 and marking inputs as active") {
      parent_blend2_weight = 1.f;
      blend_tree.StartUpdateTick();
      blend_tree.MarkActiveInputs(std::vector<AnimGraphConnection>());
      THEN(
          "parent AnimSampler is inactive and embedded AnimSampler is active") {
        CHECK(walk_node->m_state == AnimNodeEvalState::Deactivated);
        CHECK(embedded_run_node->m_state == AnimNodeEvalState::Activated);
      }
    }

    WHEN("Setting the blend weight to 0.3 and marking inputs as active") {
      parent_blend2_weight = 0.3f;
      blend_tree.StartUpdateTick();
      blend_tree.MarkActiveInputs(std::vector<AnimGraphConnection>());
      THEN("both parent AnimSampler and embedded AnimSampler are active") {
        CHECK(walk_node->m_state == AnimNodeEvalState::Activated);
        CHECK(embedded_run_node->m_state == AnimNodeEvalState::Activated);
      }
    }
  }

  graph_context.freeAnimations();
}