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gunkiss/src/Pudding.hpp

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/* _______________ ,----------------------------------------------------------------.
//`````````````\\ \ \
//~~~~~~~~~~~~~~~\\ \ by @ohsqueezy & @sleepin \
//=================\\ \ [ohsqueezy.itch.io] [sleepin.itch.io] \
// \\ \ \
// \\ \ code released under the zlib license [git.nugget.fun/pudding] \
// ☆ GUNKISS ☆ \\ \ \
//_________________________\\ `---------------------------------------------------------------*/
#ifndef PUDDING_H_
#define PUDDING_H_
/* Needed for functions in glm/gtx/ */
#define GLM_ENABLE_EXPERIMENTAL
/* cURL and cv::VideoCapture are not available for Emscripten, so use alternatives for Emscripten builds */
#if defined(__EMSCRIPTEN__)
#include <emscripten/fetch.h>
#include <emscripten/bind.h>
using namespace emscripten;
#else
#include <curl/curl.h>
#include "opencv2/videoio.hpp"
#include "opencv2/highgui.hpp"
#endif
#include <stdlib.h>
#include <string>
#include <iostream>
#include <algorithm>
#include <thread>
#include <mutex>
#include <memory>
#include <stdexcept>
#include <functional>
#include <chrono>
#include "SDL.h"
#include "SDL_image.h"
#include "sdl2-gfx/SDL2_gfxPrimitives.h"
#include "json/json.hpp"
#include "glm/glm.hpp"
#include "glm/gtx/matrix_decompose.hpp"
#include "opencv2/core.hpp"
#include "opencv2/imgproc.hpp"
#include "zbar.h"
#include "Game.hpp"
#include "Color.hpp"
#include "extension.hpp"
#include "filesystem.hpp"
#include "Animation.hpp"
#include "Texture.hpp"
#include "GLObject.hpp"
#include "Log.hpp"
#include "Attributes.hpp"
#include "VBO.hpp"
#include "Item.hpp"
#include "Model.hpp"
#include "utility.hpp"
#include "Box.hpp"
/*!
* This class is used for printing the running time of a function or lambda. It can be
* inserted inline into existing code by wrapping the block to time in a lambda. It can also be
* given a function and optionally the function's arguments and will return a value of the type specified.
*
* The following code
*
* ~~~{.cpp}
* std::string fake(std::string x, std::string y)
* {
* return x + y;
* }
*
* // Needs SPACEBOX initialization for log call
* int ii = 0;
* time_it()([&] { while (ii++ < 1000); });
* ii = 0;
* int revolving = time_it<int, int>("for revolving")([&](int x) -> int { while (ii++ < 10000); return x; }, 1);
* ii = 0;
* std::cout << "Revolving is " << revolving << std::endl;
* std::string addition = time_it<std::string, std::string, std::string>("for combination")(fake, "Hello, ", "World!");
* std::cout << "Combination is " << addition << std::endl;
* time_it("for many combinations")([&] { while (ii++ < 100000) { fake("a", "b"); } });
* ~~~
*
* gives the expected output
*
* Elapsed time: 2.588e-06s
* Elapsed time for revolving: 2.1547e-05s
* Revolving is 1
* Elapsed time for combination: 7.27e-07s
* Combination is Hello, World!
* Elapsed time for many combinations: 0.0107351s
*/
template<typename return_type = void, typename... arguments>
class time_it
{
private:
std::string info = "";
public:
time_it(std::string info = "") : info(info) {};
return_type operator()(const std::function<return_type(arguments...)>&& block, arguments... args)
{
std::cout << "{Elapsed time";
if (!info.empty())
{
std::cout << " " << info;
}
std::cout << ": ";
auto start = std::chrono::steady_clock::now();
std::chrono::duration<float> elapsed;
if constexpr (std::is_same_v<return_type, void>)
{
block(args...);
elapsed = std::chrono::steady_clock::now() - start;
std::cout << elapsed.count() << "s}" << std::endl;
}
else
{
return_type result = block(args...);
elapsed = std::chrono::steady_clock::now() - start;
std::cout << elapsed.count() << "s}" << std::endl;
return result;
}
}
};
/* A connection is an object containing a binary state of either on (connected) or off (not connected)
* and user supplied functions that run automatically on each state change. The functions each have the
* same return type, number of arguments, and argument types determined by the template arguments.
*
* Original test code:
*
* Connection<> connection_d(std::bind(&Game::print_frame_length_history, this));
* connection_d.toggle();
* Connection<int, int, int> connection_f {
* std::function<int(int, int)>(&sb::mod), std::function<int(int, int)>(&sb::mod) };
* Connection<> connection_g = connection_d;
* connection_g.toggle();
* connection_g.disconnect();
* int result;
* result = connection_f.connect(3, 5);
* std::cout << result << " ";
* std::cout << connection_f.disconnect(20, 6) << " ";
* result = connection_f.toggle(800, 120);
* std::cout << result << std::endl;
* result = connection_f.connect(111, 44);
* std::cout << result << std::endl;
*/
template<typename return_type = void, typename... arguments>
class Connection
{
private:
enum State : bool
{
STATE_OFF,
STATE_ON
};
using callback = std::function<return_type(arguments...)>;
State connection_state = STATE_OFF;
callback on_connect_callback, on_disconnect_callback;
public:
/* Without any arguments, the connection object will be in the disconnected state with empty functions. Otherwise,
* the supplied functions will be added to the connection object. The first function argument will be run on a
* connection, and the second function argument will be run on a disconnection. */
Connection(callback on_connect_callback = callback(), callback on_disconnect_callback = callback())
{
if (on_connect_callback)
{
on_connect(on_connect_callback);
if (on_disconnect_callback)
{
on_disconnect(on_disconnect_callback);
}
}
}
/* Set the function that will run when a connection is made. */
void on_connect(callback on_connect)
{
on_connect_callback = on_connect;
}
/* Set the function that will run when a disconnection happens. */
void on_disconnect(callback on_disconnect)
{
on_disconnect_callback = on_disconnect;
}
/* Set state to Connection::STATE_ON and run response function. If return_type is non-void and the
* connection is already connected, the function will not run and the return value will be a default
* constructed value of the type return_type. Therefore, return_type must be default constructible. */
return_type connect(arguments... args)
{
if (!*this)
{
connection_state = STATE_ON;
if (on_connect_callback)
{
return on_connect_callback(args...);
}
}
return return_type();
}
/* Set state to Connection::STATE_OFF and run response function. If return_type is non-void and the
* connection is already disconnected, the function will not run and the return value will be a default
* constructed value of the type return_type. Therefore, return_type must be default constructible. */
return_type disconnect(arguments... args)
{
if (*this)
{
connection_state = STATE_OFF;
if (on_disconnect_callback)
{
return on_disconnect_callback(args...);
}
}
return return_type();
}
/* Set state to the opposite of current state, causing the appropriate response function to run. */
return_type toggle(arguments... args)
{
if (*this)
{
return disconnect(args...);
}
else
{
return connect(args...);
}
}
/* Return true if state is Connection::STATE_ON, false otherwise. */
bool connected()
{
return connection_state;
}
/* When called as a boolean, return the connection state. */
operator bool()
{
return connected();
}
};
/* Drawable class that is a plane containing a connection. Each instance:
*
* - Shares vertices and UV in VBO
* - Has its own Texture representing the button on-screen
* - Has its own response to click
* - Shares mouse collision code
* - Has its own translate + scale transformation
*
* Example:
*
* glm::vec3 w = glm::mat3({{1, 0, 0}, {0, 1, 0}, {-0.6739, -0.74, 1}}) * glm::mat3({{.1, 0, 0}, {0, .1 * (460.0 / 768.0), 0}, {0, 0, 1}}) *
* glm::vec3({-1, -1, 1});
* std::cout << w << std::endl << glm::translate(glm::vec3{-0.6739, -0.74, 0}) *
* glm::scale(glm::vec3{.1, .1 * (460.0 / 768.0), 1}) * glm::vec4{-1, -1, 0, 1} << std::endl;
* Pad p {background.current(), {-0.6739f, -0.74f}, 0.1f, get_display().window_box().aspect(), std::function<void()>()};
* const std::vector<glm::vec2>& p_position = *p.attributes("position");
* glm::vec4 final_position = p.transformation() * glm::vec4{p_position[2].x, p_position[2].y, 0, 1};
* std::cout << p.transformation() << std::endl << final_position << std::endl;
* assert(final_position == glm::vec4({w.x, w.y, 0, 1}));
*/
class Pad : public Plane
{
private:
inline static const glm::vec3 ROTATION_AXIS {0.0f, 0.0f, 1.0f};
using callback = std::function<void()>;
Connection<> connection;
Box collision_box;
float rotation_angle = 0.0f, scale_factor = 0.0f, scale_ratio = 1.0f;
glm::vec2 translation_vector {0.0f, 0.0f};
void transform();
public:
Pad() {};
Pad(sb::Texture, glm::vec2, float, float, callback, float = 0.0f);
void rotation(float);
void scale(float, float = 1.0f);
void translation(const glm::vec2&);
void on_connect(callback);
bool collide(const glm::vec2&) const;
void draw(GLuint);
};
/* These variables will be bound to JS. They are placed in the global scope, so they can be read and written by both
* C++ and JS. The associated functions are bound to JS so they can be used to write values to the variables. The
* first flag is used by both C++ and JS builds, so it is always included. */
bool new_frame_available = false;
#ifdef __EMSCRIPTEN__
unsigned int emscripten_heap_offset = 0;
void flag_frame();
void set_heap_offset(int offset);
#endif
class Pudding : public Game
{
private:
/* Defines for effect IDs that will be passed to the shader program. Since EFFECT_COUNT is last and every value
* is the default integer, it will be set to the number of effects available. */
enum Effect
{
EFFECT_NONE,
EFFECT_SNAKE,
EFFECT_WOBBLE,
EFFECT_COUNT
};
/* Defines for UV transformations available in the fragment shader program */
enum UVTransformation
{
UV_NONE,
UV_SQUIRCLE
};
/* Convention for calling parent class in a consistent way across classes */
typedef Game super;
/* Constants */
inline static const std::string OPEN_FOOD_API_URL = "https://world.openfoodfacts.org/api/v0/product/";
inline static const std::string OPEN_PRODUCTS_API_URL = "https://world.openproductsfacts.org/api/v0/product/";
inline static const std::string NUTRONIX_API_URL = "https://trackapi.nutritionix.com/v2/search/item?upc=";
inline static const std::string BARCODE_MONSTER_API_URL = "https://barcode.monster/api/";
inline static const std::string BEST_BUY_API_URL_1 = "https://api.bestbuy.com/v1/products(upc=";
inline static const std::string BEST_BUY_API_URL_2 = ")?format=json&apiKey=";
inline static const std::string NUTRONIX_NOT_FOUND = "resource not found";
inline static const std::string GOOGLE_BOOKS_API_URL = "https://www.googleapis.com/books/v1/volumes?q=isbn:";
inline static const std::string GIANTBOMB_API_URL = "https://www.giantbomb.com/api/release/?api_key=";
inline static const glm::vec3 ZERO_VECTOR_3D {0, 0, 0};
inline static const glm::vec3 Y_UNIT_NORMAL_3D {0, 1, 0};
inline static const glm::mat4 VIEW_MATRIX = glm::lookAt({4.0f, 2.0f, 1.0f}, {0.0f, -0.325f, 0.0f}, Y_UNIT_NORMAL_3D);
inline static const glm::vec3 PUDDING_BROWN {0.713f, 0.359f, 0.224f};
inline static const glm::vec3 PUDDING_YELLOW {0.878f, 0.859f, 0.122f};
/* Member variables */
std::shared_ptr<SDL_Cursor> poke;
std::string current_barcode, previous_barcode, current_config_barcode, current_camera_barcode;
std::vector<Item> items;
Carousel item_carousel;
int effect_id = EFFECT_NONE, pudding_triangle_vertex_count = 0, pudding_fan_vertex_count = 0;
#ifndef __EMSCRIPTEN__
cv::VideoCapture capture;
#endif
cv::Mat camera_frame;
zbar::ImageScanner image_scanner;
std::map<std::string, std::map<std::string, GLuint>> uniform;
GLuint flat_program, mvp_program;
glm::mat4 projection, model {1.0f}, mvp;
Model pudding_model;
Plane plane, camera_view;
Background background;
bool show_item = false;
sb::VAO vao;
sb::VBO vbo;
std::map<std::string, sb::Texture> labels;
Pad camera_button, previous_button, next_button, inventory_button;
Box viewport, main_viewport, pop_up_viewport;
std::mutex camera_mutex;
void load_pudding_model(float, float, int, int = 1, float = -1.0f, float = 1.0f, float = 0.3f);
void load_gl_context();
void load_tiles();
void load_pads();
void open_camera();
/*!
* Release camera resources.
*/
void close_camera();
void incorporate_open_api(Item&, const std::string&);
void incorporate_nutronix_api(Item&);
void incorporate_edamam_api(Item&);
void incorporate_best_buy_api(Item&);
void incorporate_google_books_api(Item&);
void save_item_json(const nlohmann::json&, const Item&, const std::string&) const;
nlohmann::json json_from_url(const std::string& url, const std::vector<std::string>& = {});
void web_get_bytes(const std::string& url, std::vector<std::uint8_t>& storage, const std::vector<std::string>& = {}) const;
sb::Texture texture_from_image_url(const std::string&) const;
static void destroy_texture(GLuint*);
bool item_display_active() const;
void capture_frame();
/* Define the appropriate callbacks for URL data loaders. Either cURL by default, or Fetch if compiling for Emscripten. */
#if defined(__EMSCRIPTEN__)
static void fetch_success(emscripten_fetch_t* fetch);
static void fetch_error(emscripten_fetch_t* fetch);
#else
static size_t curl_write_response(std::uint8_t*, size_t, size_t, std::vector<std::uint8_t>*);
#endif
/* Open camera on connection and close on disconnection. */
Connection<> camera_switch {
std::bind(&Pudding::open_camera, this),
std::bind(&Pudding::close_camera, this)
// [&] { capture.release(); }
};
public:
Pudding();
void respond(SDL_Event&);
void add_item(const std::string&);
Item& current_item();
void update();
virtual std::string class_name() const { return "Pudding"; }
};
/* Apply force until reaching a threshold. Use a connection object to run user functions
* when force reaches threshold and when force goes below threshold. */
template<typename return_type, typename ...arguments>
class Button
{
private:
Connection<return_type, arguments...> connection;
/* float threshold = 1.0f */
/* float force = 0.0f */
/* apply() */
/* remove() */
/* float weighted depression rate */
};
/* Allow a box object to be passed to glViewport instead of four vertices. */
void glViewport(Box);
#endif
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