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simulator.js
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// class Simulator {
// grid = null;
// gridWidth = 0;
// gridHeight = 0;
// gridStride = 9;
// chunks = null;
// nextChunks = null;
// chunkWidth = 0;
// chunkHeight = 0;
// chunkXAmount = 0;
// chunkYAmount = 0;
// chunkStride = 4;
// tick = 0;
// cameraX = 0;
// cameraY = 0;
// cameraXScale = 0;
// cameraYScale = 0;
// constructor() {
// }
// createGrid() {
// let gridArray = [];
// for (let y = 0; y < this.gridHeight; y++) {
// for (let x = 0; x < this.gridWidth; x++) {
// // if (Math.random() < 0.5 && x > gridWidth * 4 / 5) {
// if (Math.random() < 0.5) {
// gridArray.push(...[1, 0, 0, 1, 0.85 + Math.random() * 0.05, 0.5, 1, 0, 0]);
// }
// else {
// gridArray.push(...[0, 0, 0, 1, 1, 1, 1, 0, 0]);
// }
// }
// }
// this.chunkXAmount = Math.ceil(this.gridWidth / this.chunkWidth);
// this.chunkYAmount = Math.ceil(this.gridHeight / this.chunkHeight);
// let chunksArray = [];
// for (let y = 0; y < this.chunkYAmount; y++) {
// for (let x = 0; x < this.chunkXAmount; x++) {
// chunksArray.push(...[x * this.chunkWidth, x * this.chunkWidth + this.chunkWidth, y * this.chunkHeight, y * this.chunkHeight + this.chunkHeight]);
// }
// }
// this.grid = new Float32Array(gridArray);
// this.chunks = new Float32Array(chunksArray);
// this.nextChunks = new Float32Array(chunksArray);
// this.tick = 0;
// }
// updateGrid() {
// }
// }
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
const overlayCanvas = document.getElementById("overlayCanvas");
const overlayCtx = overlayCanvas.getContext("2d");
window.onresize = function() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
overlayCanvas.width = window.innerWidth;
overlayCanvas.height = window.innerHeight;
offscreenCanvas.width = window.innerWidth;
offscreenCanvas.height = window.innerHeight;
};
window.onresize();
const ID = 0;
const VEL_X = 1;
const VEL_Y = 2;
const COLOR_R = 3;
const COLOR_G = 4;
const COLOR_B = 5;
const COLOR_A = 6;
const UPDATED = 7;
let grid = new Float32Array();
// let gridWidth = 32;
// let gridHeight = 32;
let gridWidth = 128;
let gridHeight = 128;
gridWidth *= 2;
gridHeight *= 2;
let gridStride = 9;
let chunks = new Float32Array();
let nextChunks = new Float32Array();
let chunkWidth = 16;
let chunkHeight = 16;
let chunkXAmount = Math.ceil(gridWidth / chunkWidth);
let chunkYAmount = Math.ceil(gridHeight / chunkHeight);
let chunkStride = 4;
let tick = 0;
let cameraX = 0;
let cameraY = 0;
let cameraZoom = 4;
function createGrid() {
let gridArray = [];
for (let y = 0; y < gridHeight; y++) {
for (let x = 0; x < gridWidth; x++) {
// if (Math.random() < 0.5 && x > gridWidth * 4 / 5) {
if (Math.random() < 0.5) {
gridArray.push(...[1, 0, 0, 1, 0.85 + Math.random() * 0.05, 0.5, 1, 0, 0]);
}
else {
gridArray.push(...[0, 0, 0, 1, 1, 1, 1, 0, 0]);
}
}
}
let chunksArray = [];
// for (let y = 0; y < chunkYAmount; y++) {
// for (let x = 0; x < chunkXAmount; x++) {
// chunksArray.push(...[x * chunkWidth + chunkWidth + 1, x * chunkWidth - 2, y * chunkHeight + chunkHeight + 1, y * chunkHeight - 2]);
// }
// }
for (let y = 0; y < chunkYAmount; y++) {
for (let x = 0; x < chunkXAmount; x++) {
chunksArray.push(...[x * chunkWidth, x * chunkWidth + chunkWidth, y * chunkHeight, y * chunkHeight + chunkHeight]);
}
}
grid = new Float32Array(gridArray);
chunks = new Float32Array(chunksArray);
nextChunks = new Float32Array(chunksArray);
};
createGrid();
function drawGrid(ctx) {
for (let chunkY = 0; chunkY < chunkYAmount; chunkY++) {
for (let chunkX = 0; chunkX < chunkXAmount; chunkX++) {
if (chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] == chunkX * chunkWidth + chunkWidth + 1) {
continue;
}
let minX = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] - 1, chunkX * chunkWidth);
let maxX = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 1] + 1, chunkX * chunkWidth + chunkWidth - 1);
let minY = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 2] - 1, chunkY * chunkHeight);
let maxY = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 3] + 1, chunkY * chunkHeight + chunkHeight - 1);
ctx.fillStyle = "#ffffff";
ctx.fillRect(minX * cameraZoom, minY * cameraZoom, (maxX - minX + 1) * cameraZoom, (maxY - minY + 1) * cameraZoom);
for (let y = minY; y <= maxY; y++) {
for (let x = minX; x <= maxX; x++) {
let index = (x + y * gridWidth) * gridStride;
if (grid[index + ID] == 0) {
continue;
}
ctx.fillStyle = "rgba(" + grid[index + COLOR_R] * 255 + ", " + grid[index + COLOR_G] * 255 + ", " + grid[index + COLOR_B] * 255 + ", " + grid[index + COLOR_A] + ")";
ctx.fillRect(x * cameraZoom, y * cameraZoom, cameraZoom, cameraZoom);
}
}
}
}
// for (let y = 0; y < gridHeight; y++) {
// for (let x = 0; x < gridWidth; x++) {
// let index = (x + y * gridWidth) * gridStride;
// ctx.fillStyle = "rgba(" + grid[index + COLOR_R] * 255 + ", " + grid[index + COLOR_G] * 255 + ", " + grid[index + COLOR_B] * 255 + ", " + grid[index + COLOR_A] + ")";
// ctx.fillRect(x * cameraZoom, y * cameraZoom, cameraZoom, cameraZoom);
// }
// }
if (debug) {
for (let chunkY = 0; chunkY < chunkYAmount; chunkY++) {
for (let chunkX = 0; chunkX < chunkXAmount; chunkX++) {
ctx.strokeStyle = "rgba(0, 0, 0)";
ctx.lineWidth = cameraZoom / 10;
ctx.strokeRect(chunkX * chunkWidth * cameraZoom, chunkY * chunkHeight * cameraZoom, chunkWidth * cameraZoom, chunkHeight * cameraZoom);
if (chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] == chunkX * chunkWidth + chunkWidth + 1) {
continue;
}
let minX = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] - 1, chunkX * chunkWidth);
let maxX = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 1] + 1, chunkX * chunkWidth + chunkWidth - 1);
let minY = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 2] - 1, chunkY * chunkHeight);
let maxY = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 3] + 1, chunkY * chunkHeight + chunkHeight - 1);
// for (let y = minY; y <= maxY; y++) {
// for (let x = minX; x <= maxX; x++) {
// let index = (x + y * gridWidth) * gridStride;
// ctx.fillStyle = "rgba(" + grid[index + COLOR_R] * 255 + ", " + 200 + ", " + grid[index + COLOR_B] * 255 + ", " + grid[index + COLOR_A] + ")";
// ctx.fillRect(x * cameraZoom, y * cameraZoom, cameraZoom, cameraZoom);
// }
// }
// ctx.fillStyle = "rgba(125, " + chunkY * 255 + ", " + chunkX * 255 + ", 0.2)";
// ctx.fillRect(minX * cameraZoom, minY * cameraZoom, (maxX - minX + 1) * cameraZoom, (maxY - minY + 1) * cameraZoom)
ctx.strokeStyle = "rgba(0, 255, 0)";
ctx.lineWidth = cameraZoom / 5;
ctx.strokeRect(minX * cameraZoom, minY * cameraZoom, (maxX - minX + 1) * cameraZoom, (maxY - minY + 1) * cameraZoom);
}
}
}
};
function updateGrid() {
if (tick % 2 == 0) {
for (let chunkY = 0; chunkY < chunkYAmount; chunkY++) {
for (let y = chunkY * chunkHeight; y < chunkY * chunkHeight + chunkHeight; y++) {
for (let chunkX = 0; chunkX < chunkXAmount; chunkX++) {
if (chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] == chunkX * chunkWidth + chunkWidth + 1) {
continue;
}
let minY = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 2] - 1, chunkY * chunkHeight);
let maxY = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 3] + 1, chunkY * chunkHeight + chunkHeight - 1);
if (y >= minY && y <= maxY) {
let minX = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] - 1, chunkX * chunkWidth);
let maxX = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 1] + 1, chunkX * chunkWidth + chunkWidth - 1);
for (let x = minX; x <= maxX; x++) {
let index = (x + y * gridWidth) * gridStride;
if (grid[index + UPDATED] == tick) {
continue;
}
if (grid[index + ID] == 1) {
// flow(x, y, isAir, true);
flow(x, y, isAir, true, 1, true, 5);
}
}
}
// for (let y = minY; y <= maxY; y++) {
// }
}
}
}
}
else {
for (let chunkY = 0; chunkY < chunkYAmount; chunkY++) {
for (let y = chunkY * chunkHeight; y < chunkY * chunkHeight + chunkHeight; y++) {
for (let chunkX = chunkXAmount - 1; chunkX >= 0; chunkX--) {
if (chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] == chunkX * chunkWidth + chunkWidth + 1) {
continue;
}
let minY = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 2] - 1, chunkY * chunkHeight);
let maxY = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 3] + 1, chunkY * chunkHeight + chunkHeight - 1);
if (y >= minY && y <= maxY) {
let minX = Math.max(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride] - 1, chunkX * chunkWidth);
let maxX = Math.min(chunks[(chunkX + chunkY * chunkXAmount) * chunkStride + 1] + 1, chunkX * chunkWidth + chunkWidth - 1);
for (let x = maxX; x >= minX; x--) {
let index = (x + y * gridWidth) * gridStride;
if (grid[index + UPDATED] == tick) {
continue;
}
if (grid[index + ID] == 1) {
// flow(x, y, isAir, true);
flow(x, y, isAir, true, 1, true, 5);
}
}
}
// for (let y = minY; y <= maxY; y++) {
// }
}
}
}
}
for (let y = 0; y < gridHeight; y++) {
for (let x = 0; x < gridWidth; x++) {
let index = (x + y * gridWidth) * gridStride;
if (grid[index + UPDATED] == tick) {
continue;
}
if (grid[index + ID] == 1) {
// flow(x, y, isAir, true);
flow(x, y, isAir, true, 1, true, 5);
}
}
}
tick += 1;
let lastChunks = chunks;
chunks = nextChunks;
nextChunks = lastChunks;
for (let y = 0; y < chunkYAmount; y++) {
for (let x = 0; x < chunkXAmount; x++) {
let index = (x + y * chunkXAmount) * chunkStride;
nextChunks[index] = x * chunkWidth + chunkWidth + 1;
nextChunks[index + 1] = x * chunkWidth - 2;
nextChunks[index + 2] = y * chunkHeight + chunkHeight + 1;
nextChunks[index + 3] = y * chunkHeight - 2;
}
}
};
let debug = true;
let fpsTimes = [];
let fpsHistory = [];
let lastFrame = performance.now();
let frameHistory = [];
let updateHistory = [];
let drawHistory = [];
let historyLength = 100;
const timingGradient = overlayCtx.createLinearGradient(0, 106, 0, 204);
timingGradient.addColorStop(0, "#ff00ff");
timingGradient.addColorStop(0.1, "#ff0000");
timingGradient.addColorStop(0.25, "#ff0000");
timingGradient.addColorStop(0.4, "#ffff00");
timingGradient.addColorStop(0.7, "#00ff00");
timingGradient.addColorStop(1, "#00ff00");
function updateTimes(history, time) {
history.push(time);
while (history.length > historyLength) {
history.shift();
}
let minTime = history[0];
let maxTime = history[0];
let averageTime = history[0];
for (let i = 1; i < history.length; i++) {
if (minTime > history[i]) {
minTime = history[i];
}
if (maxTime < history[i]) {
maxTime = history[i];
}
averageTime += history[i];
}
averageTime /= history.length;
return [history, time, minTime, maxTime, averageTime];
};
function update() {
let updateStart = performance.now();
updateGrid();
let updateEnd = performance.now();
let drawStart = performance.now();
drawGrid(offscreenCtx);
ctx.drawImage(offscreenCanvas, 0, 0);
let drawEnd = performance.now();
fpsTimes.push(performance.now());
while (performance.now() - fpsTimes[0] > 1000) {
fpsTimes.shift();
}
let fps, minFps, maxFps, averageFps;
let frameTime, minFrameTime, maxFrameTime, averageFrameTime;
let updateTime, minUpdateTime, maxUpdateTime, averageUpdateTime;
let drawTime, minDrawTime, maxDrawTime, averageDrawTime;
[frameHistory, frameTime, minFrameTime, maxFrameTime, averageFrameTime] = updateTimes(frameHistory, performance.now() - lastFrame);
[fpsHistory, fps, minFps, maxFps, averageFps] = updateTimes(fpsHistory, fpsTimes.length);
[updateHistory, updateTime, minUpdateTime, maxUpdateTime, averageUpdateTime] = updateTimes(updateHistory, updateEnd - updateStart);
[drawHistory, drawTime, minDrawTime, maxDrawTime, averageDrawTime] = updateTimes(drawHistory, drawEnd - drawStart);
lastFrame = performance.now();
overlayCtx.clearRect(0, 0, overlayCanvas.width, overlayCanvas.height);
if (debug) {
let fpsText = "FPS: " + fps + "; Min: " + minFps + "; Max: " + maxFps + "; Avg: " + averageFps.toFixed(2) + ";";
let frameText = "Frame: " + frameTime.toFixed(2) + "ms; Min: " + minFrameTime.toFixed(2) + "ms; Max: " + maxFrameTime.toFixed(2) + "ms; Avg: " + averageFrameTime.toFixed(2) + "ms;";
let updateText = "Update: " + updateTime.toFixed(2) + "ms; Min: " + minUpdateTime.toFixed(2) + "ms; Max: " + maxUpdateTime.toFixed(2) + "ms; Avg: " + averageUpdateTime.toFixed(2) + "ms;";
let drawText = "Draw: " + drawTime.toFixed(2) + "ms; Min: " + minDrawTime.toFixed(2) + "ms; Max: " + maxDrawTime.toFixed(2) + "ms; Avg: " + averageDrawTime.toFixed(2) + "ms;";
overlayCtx.fillStyle = "#ffffff55";
overlayCtx.fillRect(1, 0, overlayCtx.measureText(fpsText).width + 4, 20);
overlayCtx.fillRect(1, 21, overlayCtx.measureText(frameText).width + 4, 20);
overlayCtx.fillRect(1, 42, overlayCtx.measureText(updateText).width + 4, 20);
overlayCtx.fillRect(1, 63, overlayCtx.measureText(drawText).width + 4, 20);
overlayCtx.font = "20px Source Code Pro";
overlayCtx.textBaseline = "top";
overlayCtx.textAlign = "left";
overlayCtx.fillStyle = "#000000";
overlayCtx.fillText(fpsText, 3, 1);
overlayCtx.fillText(frameText, 3, 22);
overlayCtx.fillText(updateText, 3, 43);
overlayCtx.fillText(drawText, 3, 64);
overlayCtx.fillStyle = "#7f7f7f7f";
overlayCtx.fillRect(5, 105, 300, 100);
overlayCtx.strokeStyle = timingGradient;
overlayCtx.lineJoin = "bevel";
overlayCtx.lineCap = "butt";
overlayCtx.lineWidth = 3;
overlayCtx.setLineDash([]);
overlayCtx.beginPath();
overlayCtx.moveTo(5, Math.max(106, 204 - frameHistory[0] * 2));
for (let i = 1; i < frameHistory.length; i++) {
overlayCtx.lineTo(5 + i * 3, Math.max(106, 204 - frameHistory[i] * 2));
}
overlayCtx.stroke();
overlayCtx.lineWidth = 2;
overlayCtx.beginPath();
overlayCtx.moveTo(5, Math.max(106, 204 - updateHistory[0] * 2));
for (let i = 1; i < updateHistory.length; i++) {
overlayCtx.lineTo(5 + i * 3, Math.max(106, 204 - updateHistory[i] * 2));
}
overlayCtx.stroke();
overlayCtx.lineWidth = 1;
overlayCtx.beginPath();
overlayCtx.moveTo(5, Math.max(106, 204 - drawHistory[0] * 2));
for (let i = 1; i < drawHistory.length; i++) {
overlayCtx.lineTo(5 + i * 3, Math.max(106, 204 - drawHistory[i] * 2));
}
overlayCtx.stroke();
overlayCtx.strokeStyle = "#555555";
overlayCtx.lineWidth = 2;
overlayCtx.setLineDash([6, 6]);
overlayCtx.beginPath();
overlayCtx.moveTo(8, 204 - 1000 / 60 * 2);
overlayCtx.lineTo(302, 204 - 1000 / 60 * 2);
overlayCtx.moveTo(8, 204 - 1000 / 30 * 2);
overlayCtx.lineTo(302, 204 - 1000 / 30 * 2);
overlayCtx.stroke();
overlayCtx.fillStyle = "#000000";
overlayCtx.fillText("60 FPS", 8, 204 - 1000 / 60 * 2 - 21);
overlayCtx.fillText("30 FPS", 8, 204 - 1000 / 30 * 2 - 21);
}
window.requestAnimationFrame(update);
};
window.requestAnimationFrame(update);
// setInterval(update, 100);