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Move fixed stars generation from sky pass to loading state, fix bug related to loaded matrial property tweening

master
C. J. Howard 1 month ago
parent
commit
0ea68f5fe5
6 changed files with 291 additions and 144 deletions
  1. +149
    -11
      src/game/states/loading.cpp
  2. +57
    -1
      src/game/states/nuptial-flight.cpp
  3. +1
    -1
      src/game/states/play.cpp
  4. +68
    -121
      src/renderer/passes/sky-pass.cpp
  5. +13
    -10
      src/renderer/passes/sky-pass.hpp
  6. +3
    -0
      src/resources/material-loader.cpp

+ 149
- 11
src/game/states/loading.cpp View File

@ -18,21 +18,34 @@
*/
#include "game/states/loading.hpp"
#include "game/states/play.hpp"
#include "game/states/splash.hpp"
#include "application.hpp"
#include "astro/illuminance.hpp"
#include "color/color.hpp"
#include "entity/components/atmosphere.hpp"
#include "entity/components/blackbody.hpp"
#include "entity/components/celestial-body.hpp"
#include "entity/components/orbit.hpp"
#include "entity/components/blackbody.hpp"
#include "entity/components/terrain.hpp"
#include "entity/components/atmosphere.hpp"
#include "entity/components/transform.hpp"
#include "entity/systems/astronomy.hpp"
#include "entity/systems/orbit.hpp"
#include "scene/directional-light.hpp"
#include "scene/ambient-light.hpp"
#include "resources/resource-manager.hpp"
#include "application.hpp"
#include "game/states/nuptial-flight.hpp"
#include "game/states/play.hpp"
#include "game/states/splash.hpp"
#include "geom/spherical.hpp"
#include "gl/drawing-mode.hpp"
#include "gl/vertex-array.hpp"
#include "gl/vertex-attribute-type.hpp"
#include "gl/vertex-buffer.hpp"
#include "physics/light/photometry.hpp"
#include "physics/orbit/orbit.hpp"
#include "renderer/material.hpp"
#include "renderer/model.hpp"
#include "renderer/passes/shadow-map-pass.hpp"
#include "renderer/vertex-attributes.hpp"
#include "resources/resource-manager.hpp"
#include "scene/ambient-light.hpp"
#include "scene/directional-light.hpp"
namespace game {
namespace state {
@ -50,6 +63,9 @@ static void planetogenesis(game::context* ctx);
/// Creates a moon.
static void selenogenesis(game::context* ctx);
/// Creates fixed stars.
static void extrasolar_heliogenesis(game::context* ctx);
void enter(game::context* ctx)
{
// Create universe
@ -69,9 +85,9 @@ void enter(game::context* ctx)
application::state next_state;
if (ctx->option_quick_start.has_value())
{
next_state.name = "play";
next_state.enter = std::bind(game::state::play::enter, ctx);
next_state.exit = std::bind(game::state::play::exit, ctx);
next_state.name = "nuptial flight";
next_state.enter = std::bind(game::state::nuptial_flight::enter, ctx);
next_state.exit = std::bind(game::state::nuptial_flight::exit, ctx);
}
else
{
@ -132,6 +148,19 @@ void cosmogenesis(game::context* ctx)
throw;
}
ctx->logger->pop_task(EXIT_SUCCESS);
// Create fixed stars
ctx->logger->push_task("Creating fixed stars");
try
{
extrasolar_heliogenesis(ctx);
}
catch (...)
{
ctx->logger->pop_task(EXIT_FAILURE);
throw;
}
ctx->logger->pop_task(EXIT_SUCCESS);
}
void heliogenesis(game::context* ctx)
@ -263,6 +292,115 @@ void selenogenesis(game::context* ctx)
ctx->overworld_sky_pass->set_moon_model(ctx->resource_manager->load<model>("moon.mdl"));
}
void extrasolar_heliogenesis(game::context* ctx)
{
// Load star catalog
string_table* star_catalog = ctx->resource_manager->load<string_table>("stars.csv");
// Allocate star catalog vertex data
std::size_t star_count = 0;
if (star_catalog->size() > 0)
star_count = star_catalog->size() - 1;
std::size_t star_vertex_size = 6;
std::size_t star_vertex_stride = star_vertex_size * sizeof(float);
float* star_vertex_data = new float[star_count * star_vertex_size];
float* star_vertex = star_vertex_data;
// Build star catalog vertex data
for (std::size_t i = 1; i < star_catalog->size(); ++i)
{
const string_table_row& catalog_row = (*star_catalog)[i];
double ra = 0.0;
double dec = 0.0;
double vmag = 0.0;
double bv_color = 0.0;
// Parse star catalog entry
try
{
ra = std::stod(catalog_row[1]);
dec = std::stod(catalog_row[2]);
vmag = std::stod(catalog_row[3]);
bv_color = std::stod(catalog_row[4]);
}
catch (const std::exception& e)
{
continue;
}
// Convert right ascension and declination from degrees to radians
ra = math::wrap_radians(math::radians(ra));
dec = math::wrap_radians(math::radians(dec));
// Transform spherical equatorial coordinates to rectangular equatorial coordinates
double3 position_bci = geom::spherical::to_cartesian(double3{1.0, dec, ra});
// Transform coordinates from equatorial space to inertial space
physics::frame<double> bci_to_inertial = physics::orbit::inertial::to_bci({0, 0, 0}, 0.0, math::radians(23.4393)).inverse();
double3 position_inertial = bci_to_inertial * position_bci;
// Convert color index to color temperature
double cct = color::index::bv_to_cct(bv_color);
// Calculate XYZ color from color temperature
double3 color_xyz = color::cct::to_xyz(cct);
// Transform XYZ color to ACEScg colorspace
double3 color_acescg = color::xyz::to_acescg(color_xyz);
// Convert apparent magnitude to irradiance (W/m^2)
double vmag_irradiance = std::pow(10.0, 0.4 * (-vmag - 19.0 + 0.4));
// Convert irradiance to illuminance
double vmag_illuminance = vmag_irradiance * (683.0 * 0.14);
// Scale color by illuminance
double3 scaled_color = color_acescg * vmag_illuminance;
// Build vertex
*(star_vertex++) = static_cast<float>(position_inertial.x);
*(star_vertex++) = static_cast<float>(position_inertial.y);
*(star_vertex++) = static_cast<float>(position_inertial.z);
*(star_vertex++) = static_cast<float>(scaled_color.x);
*(star_vertex++) = static_cast<float>(scaled_color.y);
*(star_vertex++) = static_cast<float>(scaled_color.z);
}
// Unload star catalog
ctx->resource_manager->unload("stars.csv");
// Allocate stars model
model* stars_model = new model();
// Resize model VBO and upload vertex data
gl::vertex_buffer* vbo = stars_model->get_vertex_buffer();
vbo->resize(star_count * star_vertex_stride, star_vertex_data);
// Free star catalog vertex data
delete[] star_vertex_data;
// Bind vertex attributes to model VAO
gl::vertex_array* vao = stars_model->get_vertex_array();
std::size_t vao_offset = 0;
vao->bind_attribute(VERTEX_POSITION_LOCATION, *vbo, 3, gl::vertex_attribute_type::float_32, star_vertex_stride, 0);
vao_offset += 3;
vao->bind_attribute(VERTEX_COLOR_LOCATION, *vbo, 3, gl::vertex_attribute_type::float_32, star_vertex_stride, sizeof(float) * vao_offset);
// Load star material
material* star_material = ctx->resource_manager->load<material>("fixed-star.mtl");
// Create model group
model_group* stars_model_group = stars_model->add_group("stars");
stars_model_group->set_material(star_material);
stars_model_group->set_drawing_mode(gl::drawing_mode::points);
stars_model_group->set_start_index(0);
stars_model_group->set_index_count(star_count);
// Pass stars model to sky pass
ctx->overworld_sky_pass->set_stars_model(stars_model);
}
} // namespace loading
} // namespace state
} // namespace game

+ 57
- 1
src/game/states/nuptial-flight.cpp View File

@ -20,10 +20,17 @@
#include "game/states/nuptial-flight.hpp"
#include "entity/systems/astronomy.hpp"
#include "entity/systems/orbit.hpp"
#include "entity/systems/control.hpp"
#include "entity/systems/camera.hpp"
#include "entity/components/observer.hpp"
#include "entity/components/camera-follow.hpp"
#include "entity/components/transform.hpp"
#include "entity/components/terrain.hpp"
#include "renderer/material-property.hpp"
#include "animation/screen-transition.hpp"
#include "animation/ease.hpp"
#include "resources/config-file.hpp"
#include "resources/resource-manager.hpp"
namespace game {
namespace state {
@ -31,13 +38,62 @@ namespace nuptial_flight {
void enter(game::context* ctx)
{
// Find planet EID by name
entity::id planet_eid = entt::null;
if (auto it = ctx->named_entities.find("planet"); it != ctx->named_entities.end())
{
planet_eid = it->second;
}
// Replace planet terrain material with cloud material
entity::component::terrain planet_terrain = ctx->entity_registry->get<entity::component::terrain>(planet_eid);
planet_terrain.patch_material = ctx->resource_manager->load<material>("cloud.mtl");
ctx->entity_registry->replace<entity::component::terrain>(planet_eid, planet_terrain);
// Create observer
auto observer_eid = ctx->entity_registry->create();
{
entity::component::observer observer;
observer.reference_body_eid = planet_eid;
observer.elevation = 2000.0;
observer.latitude = 0.0;
observer.longitude = 0.0;
observer.camera = ctx->overworld_camera;
ctx->entity_registry->assign<entity::component::observer>(observer_eid, observer);
// Set reference location of astronomy system
ctx->astronomy_system->set_reference_body(planet_eid);
ctx->astronomy_system->set_observer_location(double3{observer.elevation, observer.latitude, observer.longitude});
}
// Create camera focal point
{
entity::component::transform focal_point_transform;
focal_point_transform.local = math::identity_transform<float>;
focal_point_transform.warp = true;
ctx->entity_registry->assign_or_replace<entity::component::transform>(ctx->focal_point_entity, focal_point_transform);
entity::component::camera_follow focal_point_follow;
ctx->entity_registry->assign_or_replace<entity::component::camera_follow>(ctx->focal_point_entity, focal_point_follow);
}
// Setup camera
ctx->overworld_camera->look_at({0, 0, 1}, {0, 0, 0}, {0, 1, 0});
ctx->overworld_camera->set_exposure(-14.5f);
ctx->camera_system->set_camera(ctx->overworld_camera);
entity::system::control* control_system = ctx->control_system;
control_system->update(0.0, 0.0);
ctx->overworld_scene->update_tweens();
// Pause motion of celestial objects
ctx->astronomy_system->set_time_scale(0.0);
ctx->orbit_system->set_time_scale(0.0);
// Start fade in from white
ctx->fade_transition_color->set_value({1, 1, 1});
ctx->fade_transition->transition(1.0f, true, ease<float>::in_quad);
ctx->fade_transition->transition(2.0f, true, ease<float>::in_quad);
}
void exit(game::context* ctx)

+ 1
- 1
src/game/states/play.cpp View File

@ -56,7 +56,7 @@ void enter(game::context* ctx)
// Set reference location of astronomy system
ctx->astronomy_system->set_reference_body(planet_eid);
ctx->astronomy_system->set_observer_location(double3{0.0, math::radians(0.0), math::radians(0.0)});
ctx->astronomy_system->set_observer_location(double3{observer.elevation, observer.latitude, observer.longitude});
}
// Create camera focal point

+ 68
- 121
src/renderer/passes/sky-pass.cpp View File

@ -57,114 +57,20 @@ sky_pass::sky_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffe
sky_model_vao(nullptr),
sky_shader_program(nullptr),
moon_model(nullptr),
moon_material(nullptr),
moon_model_vao(nullptr),
moon_material(nullptr),
moon_shader_program(nullptr),
stars_model(nullptr),
stars_model_vao(nullptr),
star_material(nullptr),
star_shader_program(nullptr),
time_tween(nullptr),
observer_altitude_tween(0.0f, math::lerp<float, float>),
sun_position_tween(float3{1.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
sun_color_tween(float3{1.0f, 1.0f, 1.0f}, math::lerp<float3, float>),
topocentric_frame_translation({0, 0, 0}, math::lerp<float3, float>),
topocentric_frame_rotation(math::quaternion<float>::identity(), math::nlerp<float>)
{
// Load star catalog
string_table* star_catalog = resource_manager->load<string_table>("stars.csv");
// Allocate star catalog vertex data
star_count = 0;
if (star_catalog->size() > 0)
star_count = star_catalog->size() - 1;
std::size_t star_vertex_size = 6;
std::size_t star_vertex_stride = star_vertex_size * sizeof(float);
float* star_vertex_data = new float[star_count * star_vertex_size];
float* star_vertex = star_vertex_data;
// Build star catalog vertex data
for (std::size_t i = 1; i < star_catalog->size(); ++i)
{
const string_table_row& catalog_row = (*star_catalog)[i];
double ra = 0.0;
double dec = 0.0;
double vmag = 0.0;
double bv_color = 0.0;
// Parse star catalog entry
try
{
ra = std::stod(catalog_row[1]);
dec = std::stod(catalog_row[2]);
vmag = std::stod(catalog_row[3]);
bv_color = std::stod(catalog_row[4]);
}
catch (const std::exception& e)
{
continue;
}
// Convert right ascension and declination from degrees to radians
ra = math::wrap_radians(math::radians(ra));
dec = math::wrap_radians(math::radians(dec));
// Transform spherical equatorial coordinates to rectangular equatorial coordinates
double3 position_bci = geom::spherical::to_cartesian(double3{1.0, dec, ra});
// Transform coordinates from equatorial space to inertial space
physics::frame<double> bci_to_inertial = physics::orbit::inertial::to_bci({0, 0, 0}, 0.0, math::radians(23.4393)).inverse();
double3 position_inertial = bci_to_inertial * position_bci;
// Convert color index to color temperature
double cct = color::index::bv_to_cct(bv_color);
// Calculate XYZ color from color temperature
double3 color_xyz = color::cct::to_xyz(cct);
// Transform XYZ color to ACEScg colorspace
double3 color_acescg = color::xyz::to_acescg(color_xyz);
// Convert apparent magnitude to irradiance (W/m^2)
double vmag_irradiance = std::pow(10.0, 0.4 * (-vmag - 19.0 + 0.4));
// Convert irradiance to illuminance
double vmag_illuminance = vmag_irradiance * (683.0 * 0.14);
// Scale color by illuminance
double3 scaled_color = color_acescg * vmag_illuminance;
// Build vertex
*(star_vertex++) = static_cast<float>(position_inertial.x);
*(star_vertex++) = static_cast<float>(position_inertial.y);
*(star_vertex++) = static_cast<float>(position_inertial.z);
*(star_vertex++) = static_cast<float>(scaled_color.x);
*(star_vertex++) = static_cast<float>(scaled_color.y);
*(star_vertex++) = static_cast<float>(scaled_color.z);
}
// Unload star catalog
resource_manager->unload("stars.csv");
// Create star catalog VBO
star_catalog_vbo = new gl::vertex_buffer(star_count * star_vertex_stride, star_vertex_data);
// Create star catalog VAO
star_catalog_vao = new gl::vertex_array();
// Bind star catalog vertex attributes
std::size_t vao_offset = 0;
star_catalog_vao->bind_attribute(VERTEX_POSITION_LOCATION, *star_catalog_vbo, 3, gl::vertex_attribute_type::float_32, star_vertex_stride, 0);
vao_offset += 3;
star_catalog_vao->bind_attribute(VERTEX_COLOR_LOCATION, *star_catalog_vbo, 3, gl::vertex_attribute_type::float_32, star_vertex_stride, sizeof(float) * vao_offset);
// Free star catalog vertex data
delete[] star_vertex_data;
// Load star shader
star_shader_program = resource_manager->load<gl::shader_program>("star.glsl");
star_model_view_input = star_shader_program->get_input("model_view");
star_projection_input = star_shader_program->get_input("projection");
star_distance_input = star_shader_program->get_input("star_distance");
star_exposure_input = star_shader_program->get_input("camera.exposure");
}
{}
sky_pass::~sky_pass()
{}
@ -258,6 +164,31 @@ void sky_pass::render(render_context* context) const
//glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glBlendFunc(GL_ONE, GL_ONE);
// Draw stars
if (stars_model)
{
float star_distance = (clip_near + clip_far) * 0.5f;
model = math::resize<4, 4>(math::matrix_cast<float>(topocentric_frame.rotation));
model = math::scale(model, {star_distance, star_distance, star_distance});
model_view = view * model;
rasterizer->use_program(*star_shader_program);
if (star_model_view_input)
star_model_view_input->upload(model_view);
if (star_projection_input)
star_projection_input->upload(projection);
if (star_distance_input)
star_distance_input->upload(star_distance);
if (star_exposure_input)
star_exposure_input->upload(exposure);
star_material->upload(context->alpha);
rasterizer->draw_arrays(*stars_model_vao, stars_model_drawing_mode, stars_model_start_index, stars_model_index_count);
}
// Draw moon model
/*
float3 moon_position = {0, 0, 0};
@ -292,27 +223,7 @@ void sky_pass::render(render_context* context) const
}
*/
// Draw stars
{
float star_distance = (clip_near + clip_far) * 0.5f;
model = math::resize<4, 4>(math::matrix_cast<float>(topocentric_frame.rotation));
model = math::scale(model, {star_distance, star_distance, star_distance});
model_view = view * model;
rasterizer->use_program(*star_shader_program);
if (star_model_view_input)
star_model_view_input->upload(model_view);
if (star_projection_input)
star_projection_input->upload(projection);
if (star_distance_input)
star_distance_input->upload(star_distance);
if (star_exposure_input)
star_exposure_input->upload(exposure);
rasterizer->draw_arrays(*star_catalog_vao, gl::drawing_mode::points, 0, star_count);
}
}
void sky_pass::set_sky_model(const model* model)
@ -398,6 +309,42 @@ void sky_pass::set_moon_model(const model* model)
}
}
void sky_pass::set_stars_model(const model* model)
{
stars_model = model;
if (stars_model)
{
stars_model_vao = model->get_vertex_array();
const std::vector<model_group*>& groups = *model->get_groups();
for (model_group* group: groups)
{
star_material = group->get_material();
stars_model_drawing_mode = group->get_drawing_mode();
stars_model_start_index = group->get_start_index();
stars_model_index_count = group->get_index_count();
}
if (star_material)
{
star_shader_program = star_material->get_shader_program();
if (star_shader_program)
{
star_model_view_input = star_shader_program->get_input("model_view");
star_projection_input = star_shader_program->get_input("projection");
star_distance_input = star_shader_program->get_input("star_distance");
star_exposure_input = star_shader_program->get_input("camera.exposure");
}
}
}
else
{
stars_model = nullptr;
}
}
void sky_pass::update_tweens()
{
observer_altitude_tween.update();

+ 13
- 10
src/renderer/passes/sky-pass.hpp View File

@ -55,6 +55,7 @@ public:
void set_sky_model(const model* model);
void set_time_tween(const tween<double>* time);
void set_moon_model(const model* model);
void set_stars_model(const model* model);
void set_topocentric_frame(const physics::frame<float>& frame);
@ -76,7 +77,6 @@ private:
const gl::shader_input* resolution_input;
const gl::shader_input* time_input;
const gl::shader_input* exposure_input;
const gl::shader_input* observer_altitude_input;
const gl::shader_input* sun_direction_input;
const gl::shader_input* sun_color_input;
@ -93,15 +93,6 @@ private:
const gl::shader_input* moon_moon_position_input;
const gl::shader_input* moon_sun_position_input;
gl::vertex_buffer* star_catalog_vbo;
gl::vertex_array* star_catalog_vao;
gl::shader_program* star_shader_program;
const gl::shader_input* star_model_view_input;
const gl::shader_input* star_projection_input;
const gl::shader_input* star_exposure_input;
const gl::shader_input* star_distance_input;
std::size_t star_count;
const model* sky_model;
const material* sky_material;
const gl::vertex_array* sky_model_vao;
@ -115,6 +106,18 @@ private:
gl::drawing_mode moon_model_drawing_mode;
std::size_t moon_model_start_index;
std::size_t moon_model_index_count;
const model* stars_model;
const material* star_material;
const gl::vertex_array* stars_model_vao;
gl::drawing_mode stars_model_drawing_mode;
std::size_t stars_model_start_index;
std::size_t stars_model_index_count;
gl::shader_program* star_shader_program;
const gl::shader_input* star_model_view_input;
const gl::shader_input* star_projection_input;
const gl::shader_input* star_exposure_input;
const gl::shader_input* star_distance_input;
const gl::texture_2d* blue_noise_map;
const gl::texture_2d* sky_gradient;

+ 3
- 0
src/resources/material-loader.cpp View File

@ -400,5 +400,8 @@ material* resource_loader::load(resource_manager* resource_manager, PH
}
}
// Update material tweens
material->update_tweens();
return material;
}

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