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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div class="life_container">
  <div id="life_simulator"></div>
</div>
            
          
!
            
              .life_container{
  margin: 0 auto;
  width: 266px;
  padding: 8px;
  text-align: center;
  background: #222;
  color: white;
  box-sizing: border-box;
  border-radius: 4px;
}

#ls_input_groups_container {
    display: none;
    margin-bottom: 12px;
}

#ls_input_groups_container.show {
    display: block;
}

#ls_input_groups_container .ls_input_groups label {
    cursor: help;
}

#ls-controls-toggle {
    width: 100%;
    color: white;
    background: black;
    border-radius: 4px;
    margin-bottom: 8px;
    cursor: pointer;
}

.ls_input_groups{
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    margin-top: 4px;
}

.ls_input_groups div {
    line-height: 16px;
    text-align: right;
    flex-grow: 1;
    padding-right: 6px;
}

.ls_input_groups label {
    line-height: 16px;
}

.ls_input_groups button {
    font-size: 12px;
    padding: 2px 4px;
    background: white;
    border: 1px solid silver;
    border-radius: 4px;
    outline: none;
}

.ls_input_groups button:hover {
    background: silver;
}

.ls_input_groups button:active {
    background: greenyellow;
}

#ls-data {
    border-bottom: 1px solid white;
    padding-bottom: 12px;
    margin-bottom: 12px;
}

#ls-data .ls_input_groups {
    font-size: 14px;
}

#ls-data .ls_input_groups div {
    padding-right: 0;
}

#ls-data #ls-legend {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
}

#ls-data #ls-legend span {
    padding: 0px 3px;
    border-radius: 2px;
    font-size: 9px;
    text-transform: uppercase;
    color:darkslateblue;
}
            
          
!
            
              // html structure
const container = document.getElementById('life_simulator');
const canvas = document.createElement('canvas');
canvas.setAttribute("id", "ls-environment");
canvas.setAttribute("width", "250");
canvas.setAttribute("height", "250");

const data = document.createElement('div');
data.setAttribute("id", "ls-data");

const legend = document.createElement('div');
legend.setAttribute("id", "ls-legend");

const inputGroupsContainer = document.createElement('div');
inputGroupsContainer.setAttribute("id", "ls_input_groups_container");

const toggleControls = document.createElement('button');
toggleControls.setAttribute("id", "ls-controls-toggle");
toggleControls.textContent = 'TOGGLE CONTROLS';
toggleControls.addEventListener('click', () => {
    if(inputGroupsContainer.className.indexOf("show") === -1){
        inputGroupsContainer.className += ' show';
    } else {
        inputGroupsContainer.className = inputGroupsContainer.className.replace(' show', '');
    }
});

// appending
container.appendChild(canvas);
container.appendChild(data);
container.appendChild(toggleControls);
container.appendChild(inputGroupsContainer);

const ctx = canvas.getContext('2d');
ctx.imageSmoothingEnabled = false;
ctx.mozImageSmoothingEnabled = false;

const colors = {
    blank:      [0,0,0],
    born:       [0,255,255],
    growing:    [255,0,255],
    mature:     [255,255,0],
    elder:      [127,127,255],
    disease:    [0,255,0],
};

const settings = {
    width: 250,
    height: 250,
    initialPopulationNumber: 12000,
    birthProbability: 0.25,
    maximumProgeny: 4,
    maturityAge: 480,
    deathAge: 760,
    agingSpeed: 1,
    diseaseRate: 0.25,
    diseaseMortality: 5,
};

const settingInputs = {
    width: [100, 250, 10, 'width', 'Canvas size: width.'],
    height: [100, 250, 10, 'height', 'Canvas size: height.'],
    initialPopulationNumber: [1000, 100000, 500, 'initial pop', 'Initial population.'],
    birthProbability: [0, 1, 0.05, 'birth', 'Birth: probability of procreation.', colors.born],
    maximumProgeny: [1, 32, 1, 'progeny', 'Birth: maximum amount of children.'],
    maturityAge: [10, 2000, 10, 'maturity', 'Birth: age of maturity for procreation. In Age cycles.', colors.mature],
    deathAge: [10, 2000, 10, 'death', 'Maximum lifespan. In Age cycles.', colors.elder],
    agingSpeed: [1, 100, 1, 'aging speed', 'Speed of Age cycles.', colors.growing],
    diseaseRate: [0, 1, 0.05, 'disease', 'Disease: probability of getting sick.', colors.disease],
    diseaseMortality: [5, 500, 5, 'mortality', 'Disease: life shortening power. In Age cycles.'],
};

const requireRestart = ['width', 'height', 'initialPopulationNumber'];

const dataMaker = (label) => {
    const cnt = document.createElement('div');
    cnt.setAttribute('class', 'ls_input_groups');

    const lbl = document.createElement('label');
    lbl.textContent = label;

    const val = document.createElement('div');

    cnt.appendChild(lbl);
    cnt.appendChild(val);

    data.appendChild(cnt);

    return val;
};

const dataSpans = {
    maxPopulation: dataMaker('Max Population'),
    population: dataMaker('Population'),
    age: dataMaker('Age'),
    totalBirths: dataMaker('Total births'),
    frameRate: dataMaker('Frame rate'),
};

Object.keys(colors).forEach((e) => {
    const col = document.createElement('span');
    col.setAttribute('style', `background: rgb(${colors[e].join(',')})`);
    col.textContent = e;

    legend.appendChild(col);
});

data.appendChild(legend);

let imgData = ctx.createImageData(settings.width, settings.height);
let initialPopulation = Array(settings.width * settings.height).fill(null);
let availableSpace = initialPopulation.length;
let totalBirths = 0;
let age = 0;

let started;
let paused;
let timeout;

const lookupTable = [];

/* inputs */
Object.keys(settings).forEach(el => {
    const input = document.createElement('input');
    input.setAttribute('id', el);
    input.setAttribute('type', 'range');
    input.setAttribute('min', settingInputs[el][0]);
    input.setAttribute('max', settingInputs[el][1]);
    input.setAttribute('step', settingInputs[el][2]);
    input.value = settings[el];

    const label = document.createElement('label');
    label.textContent = settingInputs[el][3];
    label.setAttribute('title', settingInputs[el][4]);
    if(settingInputs[el][5]){
        label.setAttribute('style', `color: rgb(${settingInputs[el][5].join(',')})`);
    }

    const span = document.createElement('div');
    span.setAttribute('id', `${el}Span`);
    span.textContent = settings[el];

    input.addEventListener('input', (e) => {
        settings[el] = e.srcElement.value;
        span.textContent = settings[el];

        if(requireRestart.includes(el)){
            restart();
        }
    });

    const inputContainer = document.createElement('div');
    inputContainer.setAttribute('class', 'ls_input_groups');

    inputContainer.appendChild(label);
    inputContainer.appendChild(span);
    inputContainer.appendChild(input);

    inputGroupsContainer.appendChild(inputContainer);
});

const startButton = document.createElement('button');
startButton.setAttribute('id', 'start');
startButton.textContent = 'START';

startButton.addEventListener('click', () => {
    clearTimeout(timeout);
    started = true;

    if( paused ) {
        paused = false;
        repeater();
    } else {
        restart();
    }
});

const pauseButton = document.createElement('button');
pauseButton.setAttribute('id', 'pause');
pauseButton.textContent = 'PAUSE';

pauseButton.addEventListener('click', () => {
    paused = true;
    started = false;
});

const stopButton = document.createElement('button');
stopButton.setAttribute('id', 'stop');
stopButton.textContent = 'STOP';

stopButton.addEventListener('click', () => {
    paused = false;
    started = false;
    clearTimeout(timeout);
});

const inputContainer = document.createElement('div');
inputContainer.setAttribute('class', 'ls_input_groups');

inputContainer.appendChild(startButton);
inputContainer.appendChild(pauseButton);
inputContainer.appendChild(stopButton);

container.appendChild(inputContainer);
/* inputs */

/* LOGIC */
const imageMaker = (pop) => {
    const t0 = performance.now();

    age += parseInt(settings.agingSpeed);

    const emptyIndexes = [];
    for(let f=0; f<availableSpace; f++){
        if(!pop[f]){ emptyIndexes.push(f); }
    }

    emptyIndexes.sort(() => (0.5 - lookup()));

    for(let x=0; x<availableSpace; x++){
        let element = colors.blank;

        if(pop[x] !== null){
            pop[x].age += parseInt(settings.agingSpeed);

            if(pop[x].age >= pop[x].death){
                emptyIndexes.push(x);
                pop[x] = null;
            } else if (pop[x].age >= pop[x].elder){
                pop[x].color = colors.elder;
            } else {
                if(pop[x].age >= pop[x].born){
                    pop[x].color = colors.growing;
                }

                if (pop[x].age >= pop[x].maturity){
                    pop[x].color = colors.mature;

                    if(lookup() > 1 - settings.birthProbability && emptyIndexes.length > 0){
                        pop[x].children++;
                        if(pop[x].children < pop[x].maxChildren){
                            pop[emptyIndexes.pop()] = newBorn(pop[x].diseased);
                        }
                    }
                }
            }

            if(pop[x] && pop[x].diseased){
                pop[x].color = colors.disease;
                pop[x].death -= settings.diseaseMortality;
            }

            element = pop[x] ? pop[x].color : colors.blank;
        }

        let i = x * 4;
        imgData.data[i] = element[0];
        imgData.data[i+1] = element[1];
        imgData.data[i+2] = element[2];
        imgData.data[i+3] = 255;
    }

    const t1 = performance.now();

    ctx.clearRect(0, 0, canvas.width, canvas.height);
    ctx.putImageData(imgData, 0, 0);

    dataSpans.population.textContent = pop.filter(e => e !== null).length;
    dataSpans.frameRate.textContent = (t1 - t0).toFixed(2) + 'ms';
    dataSpans.age.textContent = age;
    dataSpans.totalBirths.textContent = totalBirths;

    if(pop.filter(e => e !== null).length === 0){
        started = false;
        data.setAttribute('class', 'red');
    }
};

const newBorn = (hasDisease = false) => {
    totalBirths++;
    const maturity = parseInt(lookup() * settings.maturityAge);
    const death = parseInt(lookup() * settings.deathAge);
    const maxChildren = parseInt(lookup() * settings.maximumProgeny);
    const elder = maturity + (death - maturity) * lookup();

    return {
        age: 0,
        born: maturity * 0.25,
        maturity,
        elder,
        death,
        children: 0,
        maxChildren,
        color: colors.born,
        diseased: hasDisease ? hasDisease : lookup() > (1 - settings.diseaseRate),
    }
};

let random = 0;

const lookup = () => {
    random++;
    if(random >= lookupTable.length){
        random = 0;
    }

    return lookupTable[random];
};

const repeater = () => {
    imageMaker(initialPopulation);

    if(started){
        timeout = requestAnimationFrame(repeater);
    }
};

const restart = () => {
    data.setAttribute('class', '');
    totalBirths = 0;
    age = 0;

    imgData = ctx.createImageData(settings.width, settings.height);

    initialPopulation = Array(settings.width * settings.height).fill(null);

    availableSpace = initialPopulation.length;

    dataSpans.maxPopulation.textContent = availableSpace;

    for(let e = 0; e < availableSpace; e++){
        lookupTable.push(Math.random());

        if(e < settings.initialPopulationNumber){
            initialPopulation[e] = newBorn();
        }
    }

    initialPopulation.sort(() => (0.5 - lookup()));

    repeater();
};

restart();
/* LOGIC */
            
          
!
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