From 46f7964d072340d542e60ee6b7a15456496296ab Mon Sep 17 00:00:00 2001 From: onezDerv Date: Sun, 1 Sep 2024 21:55:00 -0400 Subject: [PATCH] basic exploration mechanics --- index.html | 2 +- js/index.js | 116 ++++++++++++++++++++++++++++++++++++++++++++++------ 2 files changed, 104 insertions(+), 14 deletions(-) diff --git a/index.html b/index.html index aeab0f2..b933a8e 100644 --- a/index.html +++ b/index.html @@ -8,7 +8,7 @@

MapTest

- +
diff --git a/js/index.js b/js/index.js index f50a326..8edab80 100644 --- a/js/index.js +++ b/js/index.js @@ -1,7 +1,19 @@ -function getRGBA(data, i) { - let out = []; +const BIASES = { + 0xc8ff50: 1, + 0x46aafa: 0.5, + 0xff0000: 0.75, + 0x0000ff: 0.4, +}; + +function validXY(x, y) { + if (x < 0 || x >= 3200) return false; + if (y < 0 || y >= 1600) return false; + return true; +} + +function getRGBA(data, i, out) { for (let j = i * 4; j < i * 4 + 4; j++) { - out.push(data[j]); + out[j - i*4] = data[j]; } return out; } @@ -12,27 +24,101 @@ function setRGBA(data, i, input) { } } +function isLand(data) { + if (data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255) return false; + return true; +} + function Game(baseMap) { this.img = new Image(); this.baseMap = baseMap; } Game.prototype.main = function() { - var {biomes, ctx} = this; - var dat = ctx.getImageData(0,0,800,400); + var {biomes, ctx, colonized} = this; + var dat = ctx.getImageData(0,0,3200,1600); var data = dat.data; - - for (let i = 0; i < biomes.data.length; i++) { - let rgba = getRGBA(biomes.data,i); + var out = new Uint8Array(4); - if (rgba[0] == 255 && rgba[1] == 255 && rgba[2] == 255 && rgba[3] == 255) { + for (let k = 0; k < 3200*1600/10; k++) { + let i = Math.floor(Math.random() * biomes.data.length / 4); + if (!colonized[i]) continue; + + var x = i % 3200; + var y = Math.floor(i / 3200); + + let rgba = getRGBA(biomes.data,i,out); + + if (isLand(rgba)) + setRGBA(data,i,[255,128,128,255]); + + let weight = 10; + + let broken = false; + + for (let dx = -1; dx <= 1; dx++) { + for (let dy = -1; dy <= 1; dy++ ) { + weight--; + let x2 = x + dx; + let y2 = y + dy; + + let i = x2 + y2 * 3200; + + if (!validXY(x2,y2)) continue; + let rgba = getRGBA(biomes.data,i,out); + let rgbaH = rgba[0] * 0x10000 + rgba[1] * 0x100 + rgba[2]; + + if (Math.random() > ((rgbaH in BIASES) ? BIASES[rgbaH] : 0.2) / weight) { + continue; + } + if (colonized[y2 * 3200 + x2] == 1) { + continue; + } + + colonized[y2 * 3200 + x2] = 1; + broken = true; + break; + } + if (broken) break; + } + } + + ctx.putImageData(dat,0,0,0,0,3200,1600); +} + +Game.prototype.map = function() { + var {biomes, ctx} = this; + var dat = ctx.getImageData(0,0,3200,1600); + var data = dat.data; + + var out = new Uint8Array(4); + for (let i = 0; i < biomes.data.length; i++) { + let rgba = getRGBA(biomes.data,i, out); + + if (!isLand(rgba,i)) { setRGBA(data,i,[255,255,255,255]) } else { setRGBA(data,i,[0,0,0,255]); } } + + ctx.putImageData(dat,0,0,0,0,3200,1600); +} - ctx.putImageData(dat,0,0,0,0,800,400); +Game.prototype.place = function() { + var {biomes,ctx,colonized} = this; + var out = new Uint8Array(4); + + let i = 0; + + while (true) { + i = Math.floor(Math.random() * biomes.data.length / 4); + + let rgba = getRGBA(biomes.data,i,out); + + if (isLand(rgba)) break; + } + colonized[i] = 1; } Game.prototype.loop = function() { @@ -42,15 +128,19 @@ Game.prototype.loop = function() { Game.prototype.startGame = function() { var canvas = document.querySelector("#canvas"); - var ctx = canvas.getContext("2d"); + var ctx = canvas.getContext("2d",{ willReadFrequently: true }); this.ctx = ctx; - ctx.drawImage(this.img, 0, 0,800,400); + ctx.drawImage(this.img,0, 0,3200,1600); - var dat = ctx.getImageData(0,0,800,400); + var dat = ctx.getImageData(0,0,3200,1600); this.biomes = dat; + this.colonized = new Uint8Array(3200*1600); + + this.map(); + this.place(); this.loop(); }