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#include "Battle.h"
#include <algorithm>
#include <cmath>
#include <limits>
#include <memory>
#include <string>
#include <utility>
#include <raylib.h>
#include <imgui.h>
#include <kurator/campaign/scenarios.h>
#include <kurator/campaign/UniqueIdentifier.h>
#include <kurator/sim/Battle.h>
#include <kurator/sim/components.h>
#include <kurator/sim/events.h>
#include <kurator/sim/Point.h>
#include <kurator/stats/events.h>
#include <kurator/universe/ShipType.h>
#include "colors.h"
#include "components.h"
#include "Log.h"
#include "Session.h"
namespace kurator
{
Battle::Battle(std::shared_ptr<Session> _session) :
Battle(_session, campaign::scenarios::example())
{
}
Battle::Battle(std::shared_ptr<Session> _session, campaign::Scenario scenario) :
session {std::move(_session)},
battle {sim::prepare(scenario)},
time_factor {1.0}
{
battle->dispatcher().sink<sim::End>().connect<&Battle::on_end>(*this);
battle->dispatcher().sink<sim::Hit>().connect<&Battle::on_hit>(*this);
battle->dispatcher().sink<stats::ShipLeft>().connect<&Battle::on_ship_left>(*this);
auto& registry = battle->registry();
auto ships = registry.view<sim::Team, universe::ShipType, campaign::UniqueIdentifier>();
for (const auto& [entity, team, type, identifier] : ships.each()) {
std::string label = TextFormat("%s (%d)", type.name.c_str(), identifier.id);
registry.emplace<Marker>(entity, 5.0, team_color(team.id), std::move(label));
}
}
Battle::~Battle()
{
battle->dispatcher().sink<sim::End>().disconnect(*this);
battle->dispatcher().sink<sim::Hit>().disconnect(*this);
battle->dispatcher().sink<stats::ShipLeft>().disconnect(*this);
}
void
Battle::update(const float dt)
{
battle->update(dt * time_factor);
auto& registry = battle->registry();
auto timers = registry.view<Timed>();
for (auto&& [entity, timer] : timers.each()) {
timer.left -= timer.scaled ? dt * time_factor : dt;
if (timer.left < 0.0)
registry.destroy(entity);
}
auto pops = registry.view<PopMove, UIOffset>();
for (auto&& [entity, pop, offset] : pops.each()) {
const auto speed = pop.speed.scale(dt);
offset.x += speed.x;
offset.y += speed.y;
const auto damp = pop.speed.scale(pop.damp).scale(dt);
pop.speed.x -= damp.x;
pop.speed.y -= damp.y;
}
auto lines = registry.view<Line>();
for (auto&& [entity, line] : lines.each())
line.position += (1.0 + line.hlength) / line.duration * dt * time_factor;
balance.update(registry);
ImGui::SetNextWindowPos({GetScreenWidth()/2.0f, GetScreenHeight()-100.0f}, ImGuiCond_Once, {0.5f, 0.5f});
ImGui::SetNextWindowSize({240.0f, 0.0f}, ImGuiCond_Once);
if (ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_NoFocusOnAppearing)) {
ImGui::PushItemWidth(-std::numeric_limits<float>::min());
if (ImGui::Button("1x"))
time_factor = 1.0f;
ImGui::SameLine();
ImGui::SliderFloat("##time_factor", &time_factor, 0.1f, 10.0f);
ImGui::PopItemWidth();
}
ImGui::End();
if (IsKeyPressed(KEY_SPACE))
session->set(std::make_shared<Log>(session, log));
}
void
Battle::draw() const
{
ClearBackground(BLACK);
const int hwidth = GetScreenWidth() / 2;
const int hheight = GetScreenHeight() / 2;
const double scale = std::min(hwidth/15000.0, hheight/15000.0);
auto& registry = battle->registry();
auto lines = registry.view<Line>();
for (const auto& [entity, line] : lines.each()) {
const auto diff = line.end - line.start;
const auto fstart = line.position - line.hlength;
const auto fend = line.position + line.hlength;
const auto start = line.start + diff.scale(fstart > 0.0 ? fstart : 0.0);
const auto end = line.start + diff.scale(fend > 1.0 ? 1.0 : fend);
DrawLine(
hwidth + start.x*scale,
hheight + start.y*scale,
hwidth + end.x*scale,
hheight + end.y*scale,
line.color);
}
auto view = registry.view<const Marker, const sim::Transform>();
for (auto [entity, marker, transform] : view.each()) {
const int x = hwidth + transform.position.x*scale;
const int y = hheight + transform.position.y*scale;
DrawCircle(x, y, marker.radius, marker.color);
DrawLine(
x,
y,
x + marker.radius*std::cos(transform.angle),
y + marker.radius*std::sin(transform.angle),
WHITE);
DrawText(marker.name.c_str(), x+10, y-5, 10.0f, GRAY);
}
auto pops = registry.view<CenteredText, sim::Transform, UIOffset>();
for (const auto& [entity, text, transform, offset] : pops.each()) {
const int x = hwidth + transform.position.x*scale - text.width/2 + offset.x;
const int y = hheight + transform.position.y*scale - text.font_size/2 + offset.y;
DrawText(text.text.c_str(), x, y, text.font_size, text.color);
}
balance.draw();
}
void
Battle::on_end(const sim::End&)
{
session->set(std::make_shared<Log>(session, log));
}
void
Battle::on_hit(const sim::Hit& hit)
{
auto& registry = battle->registry();
if (!registry.valid(hit.victim))
return;
const std::string text = TextFormat("%.1f", hit.damage);
const auto& source = registry.get<sim::Transform>(hit.source);
const auto& victim = registry.get<sim::Transform>(hit.victim);
const auto popup = registry.create();
registry.emplace<Timed>(popup, 1.2);
registry.emplace<CenteredText>(popup, text, MeasureText(text.c_str(), 10), 10, RED);
registry.emplace<sim::Transform>(popup, victim.position, 0.0);
registry.emplace<UIOffset>(popup, 0, 0);
registry.emplace<PopMove>(popup, sim::Point{0.0, -20}, 0.9998);
const auto line = registry.create();
registry.emplace<Timed>(line, 0.2, true);
registry.emplace<Line>(
line,
RED,
source.position,
victim.position,
1000.0 / (victim.position - source.position).magnitude(),
0.2);
}
void
Battle::on_ship_left(const stats::ShipLeft& event)
{
log.push_back(event);
}
} // namespace kurator
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