HTML5 Canvas光线游走的蜂巢（六边形网格）动画

蜂巢自动编织构造动画。

html5, hexagon, grid

《aframe.js 3d拼图代码详解》作品已被踏得网收录！

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编译

JavaScript

var Hexocet = {
    seeds: [],
    stepCount: 0,
    birthPeriod: 1,
    hexSize: 20,
    targetBounceChance: 0.02,
    springStiffness: 0.01,
    viscosity: 0.8,
    particleOpacity: 0.7,
    fade: true,
    fadeLayerOpacity: 0.04
};
Hexocet.setupCanvas = function() {
    // Initialize own canvas
    var canvas = document.createElement('canvas');
    canvas.id = 'hexocet';
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
    document.body.appendChild(canvas);

// Get and store canvas context
    this.canvas = document.getElementById(canvas.id);
    this.ctx = this.canvas.getContext('2d');

// Scale parameter
    this.canvasBase = Math.min(this.canvas.width, this.canvas.height);
    // Central point coordinates
    this.xC = this.canvas.width / 2;
    this.yC = this.canvas.height / 2;
};
Hexocet.hexCoordsToXY = function(Hx, Hy) {
    // Hx and Hy are integers corresponding to vertices coordinates in Hex space
    var xPrime, yPrime, XYprime, X, Y, XY;
    var isSumEven = ((parseInt(Hx) + parseInt(Hy)) % 2 == 0 ? 1 : 0);
    xPrime = 1 * Hx;
    yPrime = 1 / Math.sqrt(3) * (3 * Hy + 1 + isSumEven);

XYprime = new Victor(xPrime * this.hexSize, yPrime * this.hexSize);
    XY = XYprime.clone().rotateDeg(30);

return {
        x: XY.x,
        y: XY.y
    };
};
Hexocet.XYtoHexCoords = function(x, y) {
    // Approximate
    var XYprime = new Victor(x / this.hexSize, y / this.hexSize).rotateDeg(-30);
    var Hx = XYprime.x,
        Hy = Math.sqrt(3) * XYprime.y / 3;
    return {
        Hx: Math.floor(Hx),
        Hy: Math.floor(Hy)
    };
};
Hexocet.update = function() {
    this.stepCount++;

// Birthrate management
    if (this.stepCount % this.birthPeriod == 0 && this.stepCount < 60000) {
        this.birth();
    }

this.move();
    this.draw();
};
Hexocet.birth = function(xBirth, yBirth, seed) {
    // Give birth around the canvas center
    var targetH = this.XYtoHexCoords(xBirth || this.xC, yBirth || this.yC);
    // I said AROUND
    var spreadArea = 1;
    targetH.Hx += Math.floor(spreadArea * (-0.5 + Math.random()));
    targetH.Hy += Math.floor(spreadArea * (-0.5 + Math.random()));
    // Convert in Cartesian coords
    var targetXY = this.hexCoordsToXY(targetH.Hx, targetH.Hy);

var seed = seed || {
        xLast: targetXY.x,
        x: targetXY.x,
        xSpeed: 0,
        yLast: targetXY.y,
        y: targetXY.y,
        ySpeed: 0,
        targetHx: targetH.Hx,
        targetHy: targetH.Hy,
        age: 0,
        hue: 190 + 15 * Math.sin(this.stepCount / 50)
    };
    this.seeds.push(seed);
};
Hexocet.move = function() {
    // Move all particles
    for (var i = 0; i < this.seeds.length; i++) {
        var seed = this.seeds[i];
        // Get older
        seed.age++;
        // Save last position
        seed.xLast = seed.x;
        seed.yLast = seed.y;

// Randomly change target
        if (Math.random() < this.targetBounceChance) {
            // Either move Hx or Hy, twice more likely to change Hx
            if (Math.random() > 0.33) {
                // Move Hx
                seed.targetHx += (Math.random() > 0.5 ? 1 : -1);
            } else {
                // Increase Hy + Hx is even
                if ((seed.targetHx + seed.targetHy) % 2 == 0) {
                    seed.targetHy += 1;
                } else {
                    seed.targetHy -= 1;
                }

}
        }

// Acceleration based on target
        var targetXY = this.hexCoordsToXY(seed.targetHx, seed.targetHy);
        // Spring
        var K = this.springStiffness;
        var accX = -K * (seed.x - targetXY.x);
        var accY = -K * (seed.y - targetXY.y);
        // Viscosity
        var visc = this.viscosity;
        accX -= visc * seed.xSpeed;
        accY -= visc * seed.ySpeed;
        // Speed
        seed.xSpeed += accX;
        seed.ySpeed += accY;

// Speed calmers (here normalizers)
        /*
    var fixedSpeed = 0.0001;
		var maxSpeed = fixedSpeed, minSpeed = fixedSpeed;
		var speed = Math.sqrt(Math.pow(this.xSpeed, 2) + Math.pow(this.ySpeed, 2));
		if (speed > maxSpeed) {
			seed.xSpeed *= maxSpeed / speed;
			seed.ySpeed *= maxSpeed / speed;
		}
		if (speed < minSpeed) {
			seed.xSpeed *= minSpeed / speed;
			seed.ySpeed *= minSpeed / speed;
		}
    */

// Position, with added canvas base size in order to maintain patterns accross zoom levels
        seed.x += 0.01 * seed.xSpeed * this.canvasBase;
        seed.y += 0.01 * seed.ySpeed * this.canvasBase;
    }
};
Hexocet.draw = function() {
    // Add translucid layer for trace effect
    if (this.fade) {
        var opa = this.fadeLayerOpacity;
        this.ctx.rect(0, 0, this.canvas.width, this.canvas.height);
        this.ctx.fillStyle = "rgba(0, 0, 0, " + opa + ")";
        this.ctx.fill();
    }
    for (var key in this.seeds) {
        var seed = this.seeds[key];

// HSLA
        var hsla = {
            h: seed.hue,
            s: '90%',
            l: '55%',
            a: this.particleOpacity
        };

// Line width
        var wLine = 2;

// Stroke
        this.ctx.strokeStyle = 'hsla(' + hsla.h + ', ' + hsla.s + ', ' + hsla.l + ", " + hsla.a + ")";
        this.ctx.lineWidth = wLine;
        this.ctx.lineCap = "round";
        this.ctx.beginPath();
        this.ctx.moveTo(seed.xLast, seed.yLast);
        this.ctx.lineTo(seed.x, seed.y);
        this.ctx.stroke();

// Point target in color
        /*
        hsla = {
          h: seed.hue,
          s: '70%',
          l: '100%',
          a: 0.01
        };
    
        wLine = 5;
    
        var targetXY = this.hexCoordsToXY(seed.targetHx, seed.targetHy);
        var tX = targetXY.x,
            tY = targetXY.y;
        this.ctx.lineWidth = wLine;
        this.ctx.strokeStyle = 'hsla(' + hsla.h + ', ' + hsla.s + ', ' + hsla.l + ", " + hsla.a + ")";
        this.ctx.beginPath();
        this.ctx.moveTo(tX, tY);
        this.ctx.lineTo(tX, tY);
        this.ctx.stroke();
        */
    }
};
Hexocet.testTheGrid = function() {
    // Line width
    var wLine = 5;

// Stroke
    this.ctx.lineWidth = wLine;
    this.ctx.lineCap = "round";

for (var i = -100; i < 100; i++) {
        for (var j = -100; j < 100; j++) {
            // HSLA
            var hsla = {
                h: 20 * j,
                s: '50%',
                l: '100%',
                a: 0.5
            };
            this.ctx.strokeStyle = 'hsla(' + hsla.h + ', ' + hsla.s + ', ' + hsla.l + ", " + hsla.a + ")";
            this.ctx.beginPath();
            var XY = this.hexCoordsToXY(i, j);
            this.ctx.moveTo(XY.x, XY.y);
            this.ctx.lineTo(XY.x, XY.y);
            this.ctx.stroke();
        }
    }
};

jQuery(document).ready(function() {
    Hexocet.setupCanvas();

var frame = function() {
        Hexocet.update();
        window.requestAnimationFrame(frame);
    };
    frame();

//Hexocet.testTheGrid();

// Particle spread on click
    jQuery('canvas#hexocet').on('mousemove', function(event) {
        var x = event.pageX,
            y = event.pageY;
        Hexocet.birth(x, y)
    });
});

// Victor.js
/*!
MIT License

Copyright (c) 2011 Max Kueng, George Crabtree
 
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
 
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
! function(t) {
    if ("object" == typeof exports) module.exports = t();
    else if ("function" == typeof define && define.amd) define(t);
    else {
        var i;
        "undefined" != typeof window ? i = window : "undefined" != typeof global ? i = global : "undefined" != typeof self && (i = self), i.Victor = t()
    }
}(function() {
    return function t(i, r, n) {
        function o(s, h) {
            if (!r[s]) {
                if (!i[s]) {
                    var u = "function" == typeof require && require;
                    if (!h && u) return u(s, !0);
                    if (e) return e(s, !0);
                    throw new Error("Cannot find module '" + s + "'")
                }
                var p = r[s] = {
                    exports: {}
                };
                i[s][0].call(p.exports, function(t) {
                    var r = i[s][1][t];
                    return o(r ? r : t)
                }, p, p.exports, t, i, r, n)
            }
            return r[s].exports
        }
        for (var e = "function" == typeof require && require, s = 0; s < n.length; s++) o(n[s]);
        return o
    }({
        1: [function(t, i, r) {
            function n(t, i) {
                return this instanceof n ? (this.x = t || 0, void(this.y = i || 0)) : new n(t, i)
            }

function o(t, i) {
                return Math.floor(Math.random() * (i - t + 1) + t)
            }

function e(t) {
                return t * h
            }

编译

CSS

HTML

蜂巢自动编织构造动画。

html5, hexagon, grid

编辑器支持Emmet

快捷键

蜂巢自动编织构造动画。

html5, hexagon, grid

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编辑器支持Emmet

快捷键

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