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Renderer.hpp
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//
// Created by acco on 3/14/21.
//
#ifndef FILO__RENDERER_HPP_
#define FILO__RENDERER_HPP_
#include <GLFW/glfw3.h>
#include <cobra/Instance.hpp>
#include <cobra/Solution.hpp>
#include <cobra/MoveGenerators.hpp>
#define FRAME_WIDTH (10)
#define TRAJECTORY_SECTION_WIDTH (300)
#define SOLUTION_SECTION_WIDTH (700)
#define TRAJECTORY_SECTION_BEGIN (FRAME_WIDTH)
#define TRAJECTORY_SECTION_END (TRAJECTORY_SECTION_BEGIN + TRAJECTORY_SECTION_WIDTH)
#define SOLUTION_SECTION_BEGIN (TRAJECTORY_SECTION_END + FRAME_WIDTH)
#define SOLUTION_SECTION_END (SOLUTION_SECTION_BEGIN + SOLUTION_SECTION_WIDTH)
#define YMIN (0)
#define YMAX (SOLUTION_SECTION_END + FRAME_WIDTH)
#define XMIN (0)
#define XMAX (700)
class Renderer {
public:
Renderer(const cobra::Instance& instance_, float initial_cost_) : instance(instance_), initial_cost(initial_cost_) {
if(!glfwInit()) {
std::cerr << "Cannot successfully execute 'glfwInit'\n";
abort();
}
window = glfwCreateWindow(900, 900, "FILO", nullptr, nullptr);
if(!window) {
std::cerr << "Cannot successfully execute 'glfwCreateWindow'\n";
abort();
}
glfwSetWindowCloseCallback(window, [](GLFWwindow*) -> void { exit(1); });
glfwSetFramebufferSizeCallback(window, [](GLFWwindow* wind, int width, int height){
glfwMakeContextCurrent(wind);
glViewport(0, 0, width, height);
});
glfwMakeContextCurrent(window);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
glfwPollEvents();
x_min = instance.get_x_coordinate(instance.get_vertices_begin());
x_max = x_min;
y_min = instance.get_y_coordinate(instance.get_vertices_begin());
y_max = y_min;
for(auto i = instance.get_vertices_begin(); i < instance.get_vertices_end(); i++) {
const auto x_i = instance.get_x_coordinate(i);
const auto y_i = instance.get_y_coordinate(i);
x_min = std::min(x_min, x_i);
x_max = std::max(x_max, x_i);
y_min = std::min(y_min, y_i);
y_max = std::max(y_max, y_i);
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
add_trajectory_point(initial_cost, initial_cost, initial_cost, initial_cost);
}
void add_trajectory_point(float shaken_solution_cost, float local_optimum_cost, float current_solution_cost, float best_solution_cost) {
auto trajectory_point = TrajectoryPoint();
trajectory_point.current_solution_gap = 100.0f * (current_solution_cost - initial_cost) / initial_cost;
trajectory_point.best_solution_gap = 100.0f * (best_solution_cost - initial_cost) / initial_cost;
trajectory_point.shaken_solution_gap = 100.0f * (shaken_solution_cost - initial_cost) / initial_cost;
trajectory_point.local_optima_gap = 100.0f * (local_optimum_cost - initial_cost) / initial_cost;
trajectory.emplace_back(trajectory_point);
min_gap = std::min(trajectory_point.best_solution_gap, min_gap);
max_gap = std::max(trajectory_point.local_optima_gap, max_gap);
}
void draw(cobra::Solution& solution,
const cobra::LRUCache& cached_vertices,
cobra::MoveGenerators& move_generators) {
glfwMakeContextCurrent(window);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(XMIN, XMAX, YMIN, YMAX, -1, 1);
glMatrixMode(GL_MODELVIEW);
glClearColor(0.14, 0.15, 0.16, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
draw_trajectory();
draw_hseparator(YMIN, FRAME_WIDTH);
draw_hseparator(TRAJECTORY_SECTION_END, SOLUTION_SECTION_BEGIN);
draw_solution(solution, cached_vertices, move_generators);
draw_hseparator(SOLUTION_SECTION_END, YMAX);
draw_vseparator(XMIN, XMIN + FRAME_WIDTH);
draw_vseparator(XMAX - FRAME_WIDTH, XMAX);
glfwSwapBuffers(window);
glfwPollEvents();
}
static void draw_hseparator(double begin, double end) {
glBegin(GL_QUADS);
glColor4f(0.18, 0.19, 0.20, 1);
glVertex2d(XMIN, begin);
glVertex2d(XMAX, begin);
glVertex2d(XMAX, end);
glVertex2d(XMIN, end);
glEnd();
glColor4f(0.25, 0.26, 0.27, 1);
glLineWidth(1);
glBegin(GL_LINES);
glVertex2d(XMIN, begin);
glVertex2d(XMAX, begin);
glEnd();
glBegin(GL_LINES);
glVertex2d(XMIN, end);
glVertex2d(XMAX, end);
glEnd();
}
static void draw_vseparator(double begin, double end) {
glBegin(GL_QUADS);
glColor4f(0.18, 0.19, 0.20, 1);
glVertex2d(begin, YMIN);
glVertex2d(end, YMIN);
glVertex2d(end, YMAX);
glVertex2d(begin, YMAX);
glEnd();
glColor4f(0.25, 0.26, 0.27, 1);
glLineWidth(1);
glBegin(GL_LINES);
glVertex2d(begin, YMIN);
glVertex2d(begin, YMAX);
glEnd();
glBegin(GL_LINES);
glVertex2d(end, YMIN);
glVertex2d(end, YMAX);
glEnd();
}
void draw_trajectory() {
auto xs = Scaler(0, trajectory.size(), XMIN+FRAME_WIDTH, XMAX-FRAME_WIDTH);
auto ys = Scaler(min_gap-0.5f, max_gap+1, TRAJECTORY_SECTION_BEGIN, TRAJECTORY_SECTION_END);
glColor4f(1.0f,1.0f,1.0f, 0.25f);
glPushAttrib(GL_ENABLE_BIT);
glLineStipple(5, 0xAAAA);
glEnable(GL_LINE_STIPPLE);
glBegin(GL_LINES);
for(auto i = std::min(static_cast<int>(std::round(min_gap-0.5f)), 1); i <= max_gap+1; i++) {
glVertex2f(xs.scale(0), ys.scale(i));
glVertex2f(xs.scale(trajectory.size()), ys.scale(i));
}
glEnd();
glPopAttrib();
glColor4f(1.0f,0.0f,0.0f, 0.50f);
glBegin (GL_POINTS);
for(auto x = 0u; x < trajectory.size(); x++) {
const auto y = trajectory[x].shaken_solution_gap;
glVertex2f(xs.scale(x), ys.scale(y));
}
glEnd ();
glColor4f(0.0f,1.0f,0.0f, 0.50f);
glBegin (GL_POINTS);
for(auto x = 0u; x < trajectory.size(); x++) {
const auto y = trajectory[x].local_optima_gap;
glVertex2f(xs.scale(x), ys.scale(y));
}
glEnd();
glBegin(GL_LINES);
for(auto x = 0u; x < trajectory.size()-1; x++) {
glColor4f(1.0f,1.0f,0.0f, 1.0f);
const auto y = trajectory[x].current_solution_gap;
glVertex2f(xs.scale(x), ys.scale(y));
glVertex2f(xs.scale(x+1), ys.scale(trajectory[x+1].current_solution_gap));
}
glEnd();
glLineWidth(4.0f);
glColor4f(0.0f,0.0f,1.0f, 1.0f);
glBegin(GL_LINES);
for(auto x = 0u; x < trajectory.size()-1; x++) {
const auto y = trajectory[x].best_solution_gap;
glVertex2f(xs.scale(x), ys.scale(y));
glVertex2f(xs.scale(x+1), ys.scale(trajectory[x+1].best_solution_gap));
}
glEnd();
}
void draw_solution(cobra::Solution& solution,
const cobra::LRUCache& cached_vertices,
cobra::MoveGenerators& move_generators) {
auto xs = Scaler(x_min, x_max, XMIN+FRAME_WIDTH, XMAX-FRAME_WIDTH);
auto ys = Scaler(y_min, y_max, SOLUTION_SECTION_BEGIN, SOLUTION_SECTION_END);
glLineWidth(1);
for(auto i = instance.get_vertices_begin(); i < instance.get_vertices_end(); i++) {
for(auto move_id : move_generators.get_move_generator_indices_involving(i)) {
const auto& move = move_generators.get(move_id);
glBegin(GL_LINES);
glColor4f(0.0, 0.43 ,0.75, 0.10);
glVertex2f(xs.scale(instance.get_x_coordinate(move.get_first_vertex())), ys.scale(instance.get_y_coordinate(move.get_first_vertex())));
glVertex2f(xs.scale(instance.get_x_coordinate(move.get_second_vertex())), ys.scale(instance.get_y_coordinate(move.get_second_vertex())));
glEnd();
}
}
for(auto i = cached_vertices.begin(); i != cobra::LRUCache::Entry::dummy_vertex; i = cached_vertices.get_next(i)) {
for(auto move_id : move_generators.get_move_generator_indices_involving(i)) {
const auto &move = move_generators.get(move_id);
glBegin(GL_LINES);
glColor4f(0.07, 0.60 ,0.98, 0.20);
glVertex2d(xs.scale(instance.get_x_coordinate(move.get_first_vertex())),ys.scale(instance.get_y_coordinate(move.get_first_vertex())));
glVertex2d(xs.scale(instance.get_x_coordinate(move.get_second_vertex())), ys.scale(instance.get_y_coordinate(move.get_second_vertex())));
glEnd();
}
}
glLineWidth(2);
for(auto route = solution.get_first_route(); route != cobra::Solution::dummy_route; route = solution.get_next_route(route)) {
const auto load_ratio = static_cast<float>(solution.get_route_load(route)) / static_cast<float>(instance.get_vehicle_capacity());
glBegin(GL_LINES);
glColor4f(load_ratio,1-load_ratio,0.00, 1.0f);
auto curr = solution.get_first_customer(route);
auto next = curr;
do {
next = solution.get_next_vertex(route, curr);
if(next == instance.get_depot()) { break; }
glVertex2f(xs.scale(instance.get_x_coordinate(curr)), ys.scale(instance.get_y_coordinate(curr)));
glVertex2f(xs.scale(instance.get_x_coordinate(next)), ys.scale(instance.get_y_coordinate(next)));
curr = next;
} while(true);
glEnd();
/*glPushAttrib(GL_ENABLE_BIT);
glLineStipple(1, 0xAAAA);
glEnable(GL_LINE_STIPPLE);
glColor4f(load_ratio,1-load_ratio,0.0, 0.1f);
glBegin(GL_LINES);
glVertex2d(instance.get_x_coordinate(solution.get_last_customer(route)), instance.get_y_coordinate(solution.get_last_customer(route)));
glVertex2d(instance.get_x_coordinate(instance.get_depot()), instance.get_y_coordinate(instance.get_depot()));
glEnd();
glPopAttrib();*/
}
glColor4f(1.0,0.75,0.00, 1.0f);
glPointSize(20);
glBegin (GL_POINTS);
glVertex2d(xs.scale(instance.get_x_coordinate(instance.get_depot())), ys.scale(instance.get_y_coordinate(instance.get_depot())));
glEnd();
glPointSize(1);
}
private:
GLFWwindow* window = nullptr;
const cobra::Instance& instance;
float initial_cost;
struct TrajectoryPoint {
float shaken_solution_gap;
float local_optima_gap;
float current_solution_gap;
float best_solution_gap;
};
float min_gap = std::numeric_limits<float>::max();
float max_gap = std::numeric_limits<float>::min();
std::vector<TrajectoryPoint> trajectory;
float x_min{}, x_max{}, y_min{}, y_max{};
class Scaler {
public:
Scaler() = default;
void set(double in_min_, double in_max_, double out_min_, double out_max_) {
in_min = in_min_;
in_max = in_max_;
out_min = out_min_;
out_max = out_max_;
scaled_min = scale(in_min);
scaled_max = scale(in_max);
}
Scaler(double in_min_, double in_max_, double out_min_, double out_max_) { set(in_min_, in_max_, out_min_, out_max_); }
double scale(double v) const { return (v - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; }
private:
double in_min = 0, in_max = 10, out_min = 0, out_max = 10, scaled_min = 0, scaled_max = 10;
};
};
#endif //FILO__RENDERER_HPP_