post_process_volume.hpp

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#pragma once
#include "volume.hpp"
 
#include <toast/export.hpp>
#include <toast/renderer/post_process_settings.hpp>
 
namespace toast {

class [[ToastNode, Icon("Aperture")]] TOAST_API PostProcessVolume : public Volume {
public:
  PostProcessVolume() { blendDistance(1.0f); }
 
  ~PostProcessVolume() override = default;

  [[nodiscard]]
  auto extents() const noexcept -> const glm::vec3& {
    return m_extents;
  }
 
  [[nodiscard]]
  auto isEnabled() const noexcept -> bool {
    return m_enabled;
  }

  [[nodiscard]]
  auto settings() const -> const renderer::PostProcessSettings&;

  [[nodiscard]]
  auto influenceAt(const glm::vec3& camera_position) const -> float;

  auto evaluateTarget(const VolumeTarget& target, float weight = 1.0f) -> bool override;
 
  void resetAccumulators() override;
 
private:
  [[nodiscard]]
  auto closestPointOnBounds(glm::vec3 point) const -> glm::vec3 override;
 
  void init();
  void end();
  void destroy();
 
  [[Reflect, Name("Enabled")]]
  bool m_enabled = true;

  [[Reflect, Name("Extents"), Unit("m"), Group("Shape")]] alignas(16) glm::vec3 m_extents = glm::vec3(10.0f);
 
  [[Reflect, Name("Bloom Threshold"), Range(0.0, 10.0), Group("Bloom")]]
  float m_bloom_threshold = 1.0f;
  [[Reflect, Name("Bloom Knee"), Range(0.0, 1.0), Group("Bloom")]]
  float m_bloom_knee = 0.5f;
  [[Reflect, Name("Bloom Filter Radius"), Range(0.0, 4.0), Group("Bloom")]]
  float m_bloom_filter_radius = 1.0f;
  [[Reflect, Name("Bloom Strength"), Range(0.0, 1.0), Group("Bloom")]]
  float m_bloom_strength = 0.05f;
 
  [[Reflect, Name("Exposure"), Range(0.0, 8.0), Group("Tonemap")]]
  float m_exposure = 1.0f;
  [[Reflect, Name("Tonemap Curve"), Enum("Reinhard", "ACES"), Group("Tonemap")]]
  int32_t m_tonemap_mode = 0;
  [[Reflect, Name("Gamma"), Range(1.0, 3.0), Group("Tonemap")]]
  float m_gamma = 2.2f;
  [[Reflect, Name("Contrast"), Range(0.0, 2.0), Group("Tonemap")]]
  float m_contrast = 1.0f;
  [[Reflect, Name("Saturation"), Range(0.0, 2.0), Group("Tonemap")]]
  float m_saturation = 1.0f;
  [[Reflect, Name("Vignette"), Range(0.0, 1.0), Group("Tonemap")]]
  float m_vignette = 0.0f;
  [[Reflect, Name("Film Grain"), Range(0.0, 1.0), Group("Tonemap")]]
  float m_grain = 0.0f;

  [[Reflect, Name("Auto Exposure"), Group("Auto Exposure")]]
  bool m_auto_exposure = false;
  [[Reflect, Name("Min Brightness"), Range(-16.0, 16.0), Group("Auto Exposure")]]
  float m_auto_exposure_min = -8.0f;
  [[Reflect, Name("Max Brightness"), Range(-16.0, 16.0), Group("Auto Exposure")]]
  float m_auto_exposure_max = 4.0f;
  [[Reflect, Name("Adapt Speed Up"), Range(0.0, 20.0), Group("Auto Exposure")]]
  float m_adapt_speed_up = 3.0f;
  [[Reflect, Name("Adapt Speed Down"), Range(0.0, 20.0), Group("Auto Exposure")]]
  float m_adapt_speed_down = 1.0f;
 
  [[Reflect, Name("FXAA Contrast Threshold"), Range(0.0, 0.2), Group("FXAA")]]
  float m_fxaa_contrast_threshold = 0.0312f;
  [[Reflect, Name("FXAA Relative Threshold"), Range(0.0, 0.5), Group("FXAA")]]
  float m_fxaa_relative_threshold = 0.125f;
  [[Reflect, Name("FXAA Subpixel Blending"), Range(0.0, 1.0), Group("FXAA")]]
  float m_fxaa_subpixel_blending = 0.75f;
 
  [[Reflect, Name("SSR Intensity"), Range(0.0, 2.0), Group("Screen Space Reflections")]]
  float m_ssr_intensity = 1.0f;
  [[Reflect, Name("SSR Max Roughness"), Range(0.0, 1.0), Group("Screen Space Reflections")]]
  float m_ssr_max_roughness = 0.6f;
  [[Reflect, Name("SSR Thickness"), Unit("m"), Range(0.01, 5.0), Group("Screen Space Reflections")]]
  float m_ssr_thickness = 0.5f;
  [[Reflect, Name("SSR Stride"), Unit("m"), Range(0.01, 1.0), Group("Screen Space Reflections")]]
  float m_ssr_stride = 0.15f;
  [[Reflect, Name("SSR Max Steps"), Range(1, 256), Group("Screen Space Reflections")]]
  int32_t m_ssr_max_steps = 48;
 
  [[Reflect, Name("AO Radius"), Unit("m"), Range(0.01, 10.0), Group("Ambient Occlusion")]]
  float m_ssao_radius = 0.5f;
  [[Reflect, Name("AO Strength"), Range(0.0, 4.0), Group("Ambient Occlusion")]]
  float m_ssao_strength = 1.0f;
  [[Reflect, Name("AO Range Cutoff"), Unit("m"), Range(0.01, 10.0), Group("Ambient Occlusion")]]
  float m_ssao_range_cutoff = 1.0f;
  [[Reflect, Name("AO Samples"), Range(1, 64), Group("Ambient Occlusion")]]
  int32_t m_ssao_sample_count = 16;

  mutable renderer::PostProcessSettings m_settings;
 
  void syncSettings() const;

  float m_influence = 0.0f;
 
  bool m_registered_proxy = false;
};
 
}