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ui.ts
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/*
* From https://www.redblobgames.com/x/2226-roguelike-dev/
* Copyright 2022 Red Blob Games <[email protected]>
* License: Apache-2.0 <http://www.apache.org/licenses/LICENSE-2.0.html>
*/
export { print } from "./console";
import * as input from "./input";
import * as simulation from "./simulation";
import { map, Edge } from "./map";
import { DEBUG, clamp, unlerp } from "./util";
// Drawing area
export const canvas = document.querySelector("#game") as HTMLCanvasElement;
export const ctx = canvas.getContext('2d');
// Tile map view
const TILE_SIZE = DEBUG? 12 : 25;
const VIEWWIDTH = canvas.width / TILE_SIZE;
const VIEWHEIGHT = canvas.height / TILE_SIZE;
if (window.devicePixelRatio && window.devicePixelRatio !== 1) {
// Handle hi-dpi displays
canvas.width *= window.devicePixelRatio;
canvas.height *= window.devicePixelRatio;
ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
}
// Sprites
declare function require(path: string): string;
function S(svg: string): Path2D {
// This relies on the way game-icons.net svgs are structured,
// as a single <path d="…"/>
return new Path2D(svg.replace(/.* d="/, "").replace(/".*/, ""));
}
export const sprites = {
person: S(require("./game-icons/delapouite/person.svg")),
rooster: S(require("./game-icons/delapouite/rooster.svg")),
grass: S(require("./game-icons/delapouite/grass.svg")),
wheat: S(require("./game-icons/lorc/wheat.svg")),
wall: S(require("./game-icons/delapouite/stone-wall.svg")),
cactus: S(require("./game-icons/delapouite/cactus.svg")),
door: S(require("./game-icons/delapouite/door.svg")),
move: S(require("./game-icons/delapouite/move.svg")),
square: S(require("./game-icons/delapouite/square.svg")),
sprout: S(require("./game-icons/lorc/sprout.svg")),
thor_hammer: S(require("./game-icons/delapouite/thor-hammer.svg")),
};
export function render() {
const halfwidth = VIEWWIDTH / 2;
const halfheight = VIEWHEIGHT / 2;
let camera = {
x: clamp(input.current.x + 0.5,
map.bounds.left + halfwidth,
map.bounds.right - halfwidth + 1),
y: clamp(input.current.y + 0.5,
map.bounds.top + halfheight,
map.bounds.bottom - halfheight + 1),
};
const dx = halfwidth - camera.x;
const dy = halfheight - camera.y;
let view = {
left: Math.floor(camera.x - halfwidth),
right: Math.ceil(camera.x + halfwidth),
top: Math.floor(camera.y - halfheight),
bottom: Math.ceil(camera.y + halfheight),
};
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.save();
ctx.scale(TILE_SIZE, TILE_SIZE);
ctx.translate(dx, dy);
// Tile backgrounds
const tileRenders = {
grass: ["hsl(100, 30%, 50%)", "hsl(110, 30%, 49%)", "hsl(90, 35%, 50%)", "hsl(100, 35%, 50%)"],
plains: ["hsl(80, 30%, 60%)", "hsl(90, 35%, 61%)", "hsl(70, 40%, 59%)", "hsl(80, 40%, 60%)"],
desert: ["hsl(50, 20%, 70%)", "hsl(50, 15%, 70%)", "hsl(50, 25%, 70%)", "hsl(45, 20%, 70%)"],
river: ["hsl(220, 50%, 44%)", "hsl(240, 50%, 43%)", "hsl(230, 50%, 45%)", "hsl(230, 50%, 42%)"],
};
const defaultPath = new Path2D("M 0,0 l 512,0 l 0,512 l -512,0 z");
function drawTile(x: number, y: number, sprite: string | null, color: string) {
ctx.translate(x, y);
ctx.scale(1/512, 1/512);
ctx.stroke(sprites[sprite] ?? defaultPath);
ctx.fillStyle = color;
ctx.fill(sprites[sprite] ?? defaultPath);
ctx.scale(512, 512);
ctx.translate(-x, -y);
}
function animationIndex(x: number, y: number): number {
return (x & 7) ^ (y & 7) ^ (((x+y) & 4) ? 0xff : 0);
}
ctx.save();
ctx.lineJoin = 'bevel'; // some of the game-icons have sharp corners
ctx.lineWidth = 1/(TILE_SIZE/512);
ctx.strokeStyle = "black";
for (let y = view.top; y <= view.bottom; y++) {
for (let x = view.left; x <= view.right; x++) {
let tile = map.tiles.get({x, y});
let index = animationIndex(x, y - (tile !== 'river'? 0 : Math.floor(simulation.loop.tickId/simulation.TICKS_PER_SECOND)));
let renderCandidates = tileRenders[tile] ?? ["red"];
let render = renderCandidates[index % renderCandidates.length];
drawTile(x, y, null, render);
let resource = map.resources.get({x, y});
if (resource) {
let growth = resource.growth/100;
let color = `hsl(${60+60*growth|0},${50*growth|0}%,50%)`;
if (resource.growth > simulation.PLANT_EDIBLE) color = "green";
drawTile(x, y, resource.appearance.sprite, color);
let berries = resource.appearance.sprite === 'cactus'
? [[0.6, 0.1], [0.2, 0.2], [0.9, 0.4]]
: [[0.5, 0.1], [0.1, 0.3], [0.9, 0.3]];
let numBerries = clamp(3 * unlerp(simulation.PLANT_EDIBLE, 100, resource.growth), 0, 3);
for (let [dx, dy] of berries.slice(0, numBerries)) {
ctx.fillStyle = "red";
ctx.beginPath();
ctx.arc(x+dx, y+dy, 0.1, 0, 2*Math.PI);
ctx.fill();
}
}
}
}
ctx.restore();
// Tile edges
function drawEdge(edge: Edge) {
let edgeType = map.edges.get(edge);
if (!edgeType) return;
let {x, y, s} = edge;
let [dirX, dirY] = s === 'W' ? [0, 1] : [1, 0];
ctx.beginPath();
switch (edgeType) {
case 'wall':
ctx.moveTo(x, y);
ctx.lineTo(x + dirX, y + dirY);
break;
case 'door':
ctx.moveTo(x + dirX*0.1 - dirY*0.1, y + dirY*0.1 + dirX*0.1);
ctx.lineTo(x + dirX*0.1 + dirY*0.1, y + dirY*0.1 - dirX*0.1);
ctx.moveTo(x + dirX*0.9 - dirY*0.1, y + dirY*0.9 + dirX*0.1)
ctx.lineTo(x + dirX*0.9 + dirY*0.1, y + dirY*0.9 - dirX*0.1)
break;
}
ctx.stroke();
}
map.rebuildAllEdges(); // HACK: placeholder
ctx.save();
// HACK: translate() here because tile rendering is slightly off,
// by 1/4 of the line width when drawing tiles; TODO: why?
ctx.translate(-0.25/TILE_SIZE, -0.25/TILE_SIZE);
ctx.strokeStyle = "white";
ctx.lineWidth = 2.5 / TILE_SIZE;
ctx.lineCap = 'square';
for (let y = view.top; y <= view.bottom; y++) {
for (let x = view.left; x <= view.right; x++) {
drawEdge({x, y, s: 'W'});
drawEdge({x, y, s: 'N'});
}
}
ctx.restore();
// TODO: room borders instead of room numbers
ctx.save();
ctx.textBaseline = 'middle';
ctx.textAlign = 'center';
ctx.font = '0.5px monospace';
ctx.fillStyle = "white";
for (let y = view.top; y <= view.bottom; y++) {
for (let x = view.left; x <= view.right; x++) {
let roomId = map.roomAt.get({x, y});
if (!roomId) continue;
ctx.fillText(roomId.toString(), x+0.5, y+0.5);
}
}
ctx.restore();
// Agents are drawn on top of most everything else (except the cursor)
ctx.save();
ctx.lineJoin = 'bevel'; // some of the game-icons have sharp corners
for (let agent of simulation.agents) {
let {x, y} = agent.location;
if (view.left <= x && x <= view.right
&& view.top <= y && y <= view.bottom) {
let color = "yellow";
if (agent.health < simulation.AGENT_HUNGRY) color = "orange";
if (agent.health < simulation.AGENT_STARVING) color = "red";
if (agent.health === 0) color = "black";
if (agent.health < 0) color = "purple"; // debugging
if (agent.dest && agent.health > 0) {
ctx.strokeStyle = "white";
ctx.lineWidth = 0.02;
ctx.beginPath();
ctx.moveTo(x + 0.5, y + 0.5);
ctx.lineTo(agent.dest.x + 0.5, agent.dest.y + 0.5);
ctx.stroke();
}
ctx.lineWidth = 1/(TILE_SIZE/512);
ctx.strokeStyle = "black";
drawTile(x, y, agent.appearance.sprite, color);
ctx.font = '0.4px monospace';
ctx.lineWidth = 2 / TILE_SIZE;
ctx.fillStyle = "white";
ctx.textAlign = 'center';
const label = agent.id.replace("agent-", "");
ctx.strokeText(label, x+0.5, y+0.9);
ctx.fillText(label, x+0.5, y+0.9);
}
}
// TODO: need to figure out a way to convey the current transform
// to the external render function. Currently scaled to tiles
// being 1x1, and then drawTile handles the further scaling to the
// 512x512 grid. But also need to convey line width somehow
input.current.render(drawTile);
ctx.restore();
ctx.restore();
}
simulation.install(render);
input.install(canvas, render);
render();