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99 lines
3.5 KiB
99 lines
3.5 KiB
#include "systems.hpp"
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#include <fmt/core.h>
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#include <string>
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#include <cmath>
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#include "rand.hpp"
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using std::string;
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using namespace fmt;
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using namespace Components;
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void System::enemy_pathing(DinkyECS::World &world, Map &game_map, Player &player) {
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const auto &player_position = world.component<Position>(player.entity);
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game_map.set_target(player_position.location);
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game_map.make_paths();
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world.system<Position, Motion>([&](const auto &ent, auto &position, auto &motion) {
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if(ent != player.entity) {
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Point out = position.location;
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game_map.neighbors(out, false);
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motion = { int(out.x - position.location.x), int(out.y - position.location.y)};
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}
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});
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game_map.clear_target(player_position.location);
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}
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void System::motion(DinkyECS::World &world, Map &game_map) {
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world.system<Position, Motion>([&](const auto &ent, auto &position, auto &motion) {
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// don't process entities that don't move
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if(motion.dx != 0 || motion.dy != 0) {
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Point move_to = {
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position.location.x + motion.dx,
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position.location.y + motion.dy
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};
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motion = {0,0}; // clear it after getting it
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if(game_map.inmap(move_to.x, move_to.y) &&
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!game_map.iswall(move_to.x,move_to.y))
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{
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position.location = move_to;
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}
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}
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});
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}
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void System::combat(DinkyECS::World &world, Player &player) {
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const auto& player_position = world.component<Position>(player.entity);
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auto& player_combat = world.component<Combat>(player.entity);
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auto& log = world.get<ActionLog>();
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world.system<Position, Combat>([&](const auto &ent, auto &pos, auto &combat) {
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if(ent != player.entity) {
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int dx = std::abs(int(pos.location.x) - int(player_position.location.x));
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int dy = std::abs(int(pos.location.y) - int(player_position.location.y));
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if(dx <= 1 && dy <= 1) {
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if(player_combat.hp > -1) {
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int dmg = Random::uniform<int>(1, combat.damage);
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player_combat.hp -= dmg;
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log.log(format("HIT! You took {} damage.", dmg));
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}
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}
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}
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});
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};
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void System::draw_entities(DinkyECS::World &world, Map &game_map, ftxui::Canvas &canvas, const Point &cam_orig, size_t view_x, size_t view_y) {
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world.system<Position, Tile>([&](const auto &ent, auto &pos, auto &tile) {
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if(pos.location.x >= cam_orig.x && pos.location.x <= cam_orig.x + view_x
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&& pos.location.y >= cam_orig.y && pos.location.y <= cam_orig.y + view_y) {
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Point loc = game_map.map_to_camera(pos.location, cam_orig);
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// the 2 and 4 are from ftxui::Canvas since it does a kind of "subpixel" drawing
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canvas.DrawText(loc.x*2, loc.y*4, tile.chr);
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}
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});
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}
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void System::draw_map(DinkyECS::World &world, Map &game_map, ftxui::Canvas &canvas, size_t view_x, size_t view_y) {
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const auto& player = world.get<Player>();
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const auto& player_position = world.component<Position>(player.entity);
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Point start = game_map.center_camera(player_position.location, view_x, view_y);
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Matrix &walls = game_map.walls();
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size_t end_x = std::min(view_x, game_map.width() - start.x);
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size_t end_y = std::min(view_y, game_map.height() - start.y);
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for(size_t x = 0; x < end_x; ++x) {
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for(size_t y = 0; y < end_y; ++y) {
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string tile = walls[start.y+y][start.x+x] == 1 ? WALL_TILE : FLOOR_TILE;
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// the 2 and 4 are from ftxui::Canvas since it does a kind of "subpixel" drawing
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canvas.DrawText(x * 2, y * 4, tile);
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}
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}
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System::draw_entities(world, game_map, canvas, start, view_x, view_y);
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}
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