Standard-of-Iron/render/ground/grass_gpu.h

#pragma once

#include <QVector3D>
#include <QVector4D>

namespace Render::GL {

struct GrassInstanceGpu {
  QVector4D pos_height{0.0F, 0.0F, 0.0F, 0.0F};
  QVector4D color_width{0.0F, 0.0F, 0.0F, 0.0F};
  QVector4D sway_params{0.0F, 0.0F, 0.0F, 0.0F};
};

struct GrassBatchParams {
  static constexpr float kDefaultSoilColorR = 0.28F;
  static constexpr float kDefaultSoilColorG = 0.24F;
  static constexpr float kDefaultSoilColorB = 0.18F;
  static constexpr float kDefaultWindStrength = 0.25F;
  static constexpr float kDefaultLightDirX = 0.35F;
  static constexpr float kDefaultLightDirY = 0.8F;
  static constexpr float kDefaultLightDirZ = 0.45F;
  static constexpr float kDefaultWindSpeed = 1.4F;

  static auto default_soil_color() -> QVector3D {
    return {kDefaultSoilColorR, kDefaultSoilColorG, kDefaultSoilColorB};
  }

  static auto default_light_direction() -> QVector3D {
    return {kDefaultLightDirX, kDefaultLightDirY, kDefaultLightDirZ};
  }

  QVector3D soil_color = default_soil_color();
  float wind_strength{kDefaultWindStrength};
  QVector3D light_direction = default_light_direction();
  float wind_speed{kDefaultWindSpeed};
  float time{0.0F};
  float pad0{0.0F};
  float pad1{0.0F};
  float pad2{0.0F};
};

} // namespace Render::GL