src/animation/blend_state_direct_instance.cpp

#include "rive/animation/blend_animation_direct.hpp"
#include "rive/animation/blend_state_direct_instance.hpp"
#include "rive/animation/state_machine_input_instance.hpp"
#include "rive/data_bind/bindable_property_number.hpp"
#include <iostream>

using namespace rive;

BlendStateDirectInstance::BlendStateDirectInstance(
    const BlendStateDirect* blendState,
    ArtboardInstance* instance)
    : BlendStateInstance<BlendStateDirect, BlendAnimationDirect>(
          blendState,
          instance)
{}

void BlendStateDirectInstance::advance(
    float seconds,
    StateMachineInstance* stateMachineInstance)
{
  BlendStateInstance<BlendStateDirect, BlendAnimationDirect>::advance(
      seconds,
      stateMachineInstance);

  for (auto& animation : m_AnimationInstances)
  {
    if (animation.blendAnimation()->blendSource() ==
        static_cast<int>(DirectBlendSource::mixValue))
    {
      auto value = animation.blendAnimation()->mixValue();
      animation.mix(std::min(1.0f, std::max(0.0f, value / 100.0f)));
    }
    else if (
        animation.blendAnimation()->blendSource() ==
        static_cast<int>(DirectBlendSource::dataBindId))
    {
      auto bindableProperty = animation.blendAnimation()->bindableProperty();
      if (bindableProperty == nullptr)
      {
        continue;
      }
      auto bindableInstance = stateMachineInstance->bindablePropertyInstance(
          bindableProperty);
      if (bindableInstance && bindableInstance->is<BindablePropertyNumber>())
      {
        auto bindableNumber = bindableInstance->as<BindablePropertyNumber>();
        auto value = bindableNumber->propertyValue();
        animation.mix(std::min(1.0f, std::max(0.0f, value / 100.0f)));
      }
    }
    else
    {
      auto inputInstance = stateMachineInstance->input(
          animation.blendAnimation()->inputId());
      auto numberInput = static_cast<const SMINumber*>(inputInstance);
      auto value = numberInput->value();
      animation.mix(std::min(1.0f, std::max(0.0f, value / 100.0f)));
    }
  }
}