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80 lines
2.2 KiB
80 lines
2.2 KiB
#include "dinkyecs.hpp"
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#include <iostream>
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#include <fmt/core.h>
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using namespace fmt;
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using DinkyECS::Entity, DinkyECS::World;
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struct Position {
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double x, y;
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};
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struct Velocity {
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double x, y;
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};
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struct Gravity {
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double level;
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};
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int main() {
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World me;
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Entity test = me.entity();
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Entity test2 = me.entity();
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me.assign<Position>(test, {10,20});
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me.assign<Velocity>(test, {1,2});
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me.assign<Position>(test2, {1,1});
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me.assign<Velocity>(test2, {10,20});
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Position &pos = me.component<Position>(test);
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println("GOT POS x={}, y={}", pos.x, pos.y);
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Velocity &vel = me.component<Velocity>(test);
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println("GOT VELOCITY x={}, y={}", vel.x, vel.y);
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println("--- Position only system:");
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me.system<Position>([](const auto &ent, auto &pos) {
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println("entity={}, pos.x={}, pos.y={}", ent, pos.x, pos.y);
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});
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println("--- Velocity only system:");
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me.system<Velocity>([](const auto &, auto &vel) {
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println("vel.x={}, vel.y={}", vel.x, vel.y);
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});
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println("--- Manually get the velocity in position system:");
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me.system<Position>([&](const auto &ent, auto &pos) {
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Velocity &vel = me.component<Velocity>(ent);
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println("entity={}, vel.x, vel.y, pos.x={}, pos.y={}", ent, vel.x, vel.y, pos.x, pos.y);
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});
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println("--- Creating facts (singletons)");
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me.set<Gravity>({0.9});
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println("--- Query only entities with Position and Velocity:");
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me.system<Position, Velocity>([&](const auto &ent, auto &pos, auto &vel) {
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Gravity &grav = me.get<Gravity>();
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println("grav={}, entity={}, vel.x, vel.y, pos.x={}, pos.y={}", grav.level, ent, vel.x, vel.y, pos.x, pos.y);
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});
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// now remove Velocity
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me.remove<Velocity>(test);
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println("--- After remove test, should only result in test2:");
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me.system<Position, Velocity>([&](const auto &ent, auto &pos, auto &vel) {
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println("entity={}, vel.x, vel.y, pos.x={}, pos.y={}", ent, vel.x, vel.y, pos.x, pos.y);
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});
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println("--- Create a stored system you can save for later.");
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auto movementSystem = me.runner<Position, Velocity>([&](const auto &ent, auto &pos, auto &vel) {
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println("entity={}, vel.x, vel.y, pos.x={}, pos.y={}", ent, vel.x, vel.y, pos.x, pos.y);
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});
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movementSystem();
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return 0;
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}
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