File global_module_defs.hpp

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// Common parameters. Ultimately, these need to be moved to a yaml file.
#pragma once

#include "headset_fov.hpp"
#include "relative_clock.hpp"

#include 
#include 
#ifndef M_PI
#    define M_PI 3.14159265358979323846
#endif
#include 
#include 

namespace ILLIXR {

struct display_params {
    // Display width in pixels
    static constexpr unsigned width_pixels = 2880; // valve index
    // static constexpr unsigned width_pixels = 3360; // quest 3

    // Display height in pixels
    static constexpr unsigned height_pixels = 1600; // valve index
    // static constexpr unsigned height_pixels = 1816; // quest 3

    // Display width in meters
    static constexpr float width_meters = 0.11047f;

    // Display height in meters
    static constexpr float height_meters = 0.06214f;

    // Separation between lens centers in meters
    static constexpr float lens_separation = 0.05f;

    // Vertical position of the lens in meters
    [[maybe_unused]] static constexpr float lens_vertical_position = height_meters / 2.0f;

    // Display horizontal field-of-view in degrees
    static constexpr float fov_x = 108.06f;

    // Display vertical field-of-view in degrees
    static constexpr float fov_y = 109.16f;

    // Meters per tangent angle at the center of the HMD (required by timewarp_gl's distortion correction)
    static constexpr float meters_per_tan_angle = static_cast<float>(width_meters / (2.f * (fov_x * M_PI / 180.0f)));

    // Inter-pupilary distance (ipd) in meters
    static constexpr float ipd = 0.064f;

    // Display refresh rate in Hz
    static constexpr float frequency = 144.0f;

    // Display period in nanoseconds
    static constexpr duration period = freq_to_period(frequency);

    // Chromatic aberration constants
    static constexpr float aberration[4] = {-0.016f, 0.0f, 0.024f, 0.0f};
};

struct rendering_params {
    // Near plane distance in meters
    static constexpr float near_z = 0.1f;

    // Far plane distance in meters
    static constexpr float far_z = 20.0f;

    static constexpr bool reverse_z = true;
};

// Offloading parameters - this really should be extended to everything though
constexpr float server_fov = 0.99f;

inline bool str_to_bool(const std::string& var) {
    std::string temp = var;
    std::transform(temp.begin(), temp.end(), temp.begin(), ::toupper);
    if (temp.empty())
        return false;
    return (temp == "TRUE" || temp == "1") ? true
        : (temp == "FALSE")                ? false
                                           : throw std::runtime_error("Invalid conversion from std::string to bool");
}

} // namespace ILLIXR