#define PARTICLE_COUNT 16384
#define STAR_COUNT 8192

#define PARTICLE_DISPATCH_SIZE 256

typedef struct
{
    uint32_t particle_count;
    float max_rad, bulge_rad;
    float angle, eccentricity;
    float base_height, height;
    float dust_temp;
    float min_star_opacity, max_star_opacity, min_dust_opacity, max_dust_opacity;
    float speed;
}   galaxy_params;

typedef struct
{
    uint32_t star_count;
    float time;
    float min_temp, max_temp;
    float star_size, dust_size, h2size;
    float h2dist;
}   galaxy_info;

VkPushConstantRange vk_push_const_init(VkShaderStageFlagBits stage, uint32_t offset, size_t size)
{
    VkPushConstantRange range =
    {
        .stageFlags = stage,
        .offset = offset,
        .size = size
    };

    return range;
}