xanhast · December 21, 2017 15:44
diff --git a/index.html b/index.html
 <!DOCTYPE html>
 <meta charset="utf-8">
 <script src="https://d3js.org/d3.v4.min.js"></script>
 <script src="https://unpkg.com/d3-3d/build/d3-3d.min.js"></script>
 <body>
 <svg width="960" height="500"></svg>
 <style type="text/css">
 button {
    position: absolute;
    right: 10px;
    top: 10px;
 }
 </style>
 <button>update</button>
 <script>
    var origin = [480, 300], scale = 20, j = 10, cubesData = [], alpha = 0, beta = 0, startAngle = Math.PI/6;
    var svg    = d3.select('svg').call(d3.drag().on('drag', dragged).on('start', dragStart).on('end', dragEnd)).append('g');
    var color  = d3.scaleOrdinal(d3.schemeCategory20);
    var cubesGroup = svg.append('g').attr('class', 'cubes');
    var mx, my, mouseX, mouseY;

    var cubes3D = d3._3d()
        .shape('CUBE')
        .x(function(d){ return d.x; })
        .y(function(d){ return d.y; })
        .z(function(d){ return d.z; })
        .rotateY( startAngle)
        .rotateX(-startAngle)
        .origin(origin)
        .scale(scale);

    function processData(data, tt){

        /* --------- CUBES ---------*/

        var cubes = cubesGroup.selectAll('g.cube').data(data, function(d){ return d.id });

        var ce = cubes
            .enter()
            .append('g')
            .attr('class', 'cube')
            .attr('fill', function(d){ return color(d.id); })
            .attr('stroke', function(d){ return d3.color(color(d.id)).darker(2); })
            .merge(cubes)
            .sort(cubes3D.sort);

        cubes.exit().remove();

        /* --------- FACES ---------*/

        var faces = cubes.merge(ce).selectAll('path.face').data(function(d){ return d.faces; }, function(d){ return d.face; });

        faces.enter()
            .append('path')
            .attr('class', 'face')
            .attr('fill-opacity', 0.95)
            .classed('_3d', true)
            .merge(faces)
            .transition().duration(tt)
            .attr('d', cubes3D.draw);

        faces.exit().remove();

        /* --------- TEXT ---------*/

        var texts = cubes.merge(ce).selectAll('text.text').data(function(d){
            var _t = d.faces.filter(function(d){
                return d.face === 'top';
            });
            return [{height: d.height, centroid: _t[0].centroid}];
        });

        texts
            .enter()
            .append('text')
            .attr('class', 'text')
            .attr('dy', '-.7em')
            .attr('text-anchor', 'middle')
            .attr('font-family', 'sans-serif')
            .attr('font-weight', 'bolder')
            .attr('x', function(d){ return origin[0] + scale * d.centroid.x })
            .attr('y', function(d){ return origin[1] + scale * d.centroid.y })
            .classed('_3d', true)
            .merge(texts)
            .transition().duration(tt)
            .attr('fill', 'black')
            .attr('stroke', 'none')
            .attr('x', function(d){ return origin[0] + scale * d.centroid.x })
            .attr('y', function(d){ return origin[1] + scale * d.centroid.y })
            .tween('text', function(d){
                var that = d3.select(this);
                var i = d3.interpolateNumber(+that.text(), Math.abs(d.height));
                return function(t){
                    that.text(i(t).toFixed(1));
                };
            });

        texts.exit().remove();

        /* --------- SORT TEXT & FACES ---------*/

        ce.selectAll('._3d').sort(d3._3d().sort);

    }

    function init(){
        cubesData = [];
        var cnt = 0;
        for(var z = -j/2; z <= j/2; z = z + 5){
            for(var x = -j; x <= j; x = x + 5){
            var h = d3.randomUniform(-2, -7)();
            var _cube = makeCube(h, x, z);
                _cube.id = 'cube_' + cnt++;
                _cube.height = h;
                cubesData.push(_cube);
            }
        }
        processData(cubes3D(cubesData), 1000);
    }

    function dragStart(){
        mx = d3.event.x;
        my = d3.event.y;
    }

    function dragged(){
        mouseX = mouseX || 0;
        mouseY = mouseY || 0;
        beta   = (d3.event.x - mx + mouseX) * Math.PI / 230 ;
        alpha  = (d3.event.y - my + mouseY) * Math.PI / 230  * (-1);
        processData(cubes3D.rotateY(beta + startAngle).rotateX(alpha - startAngle)(cubesData), 0);
    }

    function dragEnd(){
        mouseX = d3.event.x - mx + mouseX;
        mouseY = d3.event.y - my + mouseY;
    }

    function makeCube(h, x, z){
        return [
            {x: x - 1, y: h, z: z + 1}, // FRONT TOP LEFT
            {x: x - 1, y: 0, z: z + 1}, // FRONT BOTTOM LEFT
            {x: x + 1, y: 0, z: z + 1}, // FRONT BOTTOM RIGHT
            {x: x + 1, y: h, z: z + 1}, // FRONT TOP RIGHT
            {x: x - 1, y: h, z: z - 1}, // BACK  TOP LEFT
            {x: x - 1, y: 0, z: z - 1}, // BACK  BOTTOM LEFT
            {x: x + 1, y: 0, z: z - 1}, // BACK  BOTTOM RIGHT
            {x: x + 1, y: h, z: z - 1}, // BACK  TOP RIGHT
        ];
    }

    d3.selectAll('button').on('click', init);

    init();
 </script>
 </body>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<script src="https://unpkg.com/d3-3d/build/d3-3d.min.js"></script>
	<body>
	<svg width="960" height="500"></svg>
	<style type="text/css">
	button {
	position: absolute;
	right: 10px;
	top: 10px;
	}
	</style>
	<button>update</button>
	<script>
	var origin = [480, 300], scale = 20, j = 10, cubesData = [], alpha = 0, beta = 0, startAngle = Math.PI/6;
	var svg = d3.select('svg').call(d3.drag().on('drag', dragged).on('start', dragStart).on('end', dragEnd)).append('g');
	var color = d3.scaleOrdinal(d3.schemeCategory20);
	var cubesGroup = svg.append('g').attr('class', 'cubes');
	var mx, my, mouseX, mouseY;

	var cubes3D = d3._3d()
	.shape('CUBE')
	.x(function(d){ return d.x; })
	.y(function(d){ return d.y; })
	.z(function(d){ return d.z; })
	.rotateY( startAngle)
	.rotateX(-startAngle)
	.origin(origin)
	.scale(scale);

	function processData(data, tt){

	/* --------- CUBES ---------*/

	var cubes = cubesGroup.selectAll('g.cube').data(data, function(d){ return d.id });

	var ce = cubes
	.enter()
	.append('g')
	.attr('class', 'cube')
	.attr('fill', function(d){ return color(d.id); })
	.attr('stroke', function(d){ return d3.color(color(d.id)).darker(2); })
	.merge(cubes)
	.sort(cubes3D.sort);

	cubes.exit().remove();

	/* --------- FACES ---------*/

	var faces = cubes.merge(ce).selectAll('path.face').data(function(d){ return d.faces; }, function(d){ return d.face; });

	faces.enter()
	.append('path')
	.attr('class', 'face')
	.attr('fill-opacity', 0.95)
	.classed('_3d', true)
	.merge(faces)
	.transition().duration(tt)
	.attr('d', cubes3D.draw);

	faces.exit().remove();

	/* --------- TEXT ---------*/

	var texts = cubes.merge(ce).selectAll('text.text').data(function(d){
	var _t = d.faces.filter(function(d){
	return d.face === 'top';
	});
	return [{height: d.height, centroid: _t[0].centroid}];
	});

	texts
	.enter()
	.append('text')
	.attr('class', 'text')
	.attr('dy', '-.7em')
	.attr('text-anchor', 'middle')
	.attr('font-family', 'sans-serif')
	.attr('font-weight', 'bolder')
	.attr('x', function(d){ return origin[0] + scale * d.centroid.x })
	.attr('y', function(d){ return origin[1] + scale * d.centroid.y })
	.classed('_3d', true)
	.merge(texts)
	.transition().duration(tt)
	.attr('fill', 'black')
	.attr('stroke', 'none')
	.attr('x', function(d){ return origin[0] + scale * d.centroid.x })
	.attr('y', function(d){ return origin[1] + scale * d.centroid.y })
	.tween('text', function(d){
	var that = d3.select(this);
	var i = d3.interpolateNumber(+that.text(), Math.abs(d.height));
	return function(t){
	that.text(i(t).toFixed(1));
	};
	});

	texts.exit().remove();

	/* --------- SORT TEXT & FACES ---------*/

	ce.selectAll('._3d').sort(d3._3d().sort);

	}

	function init(){
	cubesData = [];
	var cnt = 0;
	for(var z = -j/2; z <= j/2; z = z + 5){
	for(var x = -j; x <= j; x = x + 5){
	var h = d3.randomUniform(-2, -7)();
	var _cube = makeCube(h, x, z);
	_cube.id = 'cube_' + cnt++;
	_cube.height = h;
	cubesData.push(_cube);
	}
	}
	processData(cubes3D(cubesData), 1000);
	}

	function dragStart(){
	mx = d3.event.x;
	my = d3.event.y;
	}

	function dragged(){
	mouseX = mouseX \|\| 0;
	mouseY = mouseY \|\| 0;
	beta = (d3.event.x - mx + mouseX) * Math.PI / 230 ;
	alpha = (d3.event.y - my + mouseY) * Math.PI / 230 * (-1);
	processData(cubes3D.rotateY(beta + startAngle).rotateX(alpha - startAngle)(cubesData), 0);
	}

	function dragEnd(){
	mouseX = d3.event.x - mx + mouseX;
	mouseY = d3.event.y - my + mouseY;
	}

	function makeCube(h, x, z){
	return [
	{x: x - 1, y: h, z: z + 1}, // FRONT TOP LEFT
	{x: x - 1, y: 0, z: z + 1}, // FRONT BOTTOM LEFT
	{x: x + 1, y: 0, z: z + 1}, // FRONT BOTTOM RIGHT
	{x: x + 1, y: h, z: z + 1}, // FRONT TOP RIGHT
	{x: x - 1, y: h, z: z - 1}, // BACK TOP LEFT
	{x: x - 1, y: 0, z: z - 1}, // BACK BOTTOM LEFT
	{x: x + 1, y: 0, z: z - 1}, // BACK BOTTOM RIGHT
	{x: x + 1, y: h, z: z - 1}, // BACK TOP RIGHT
	];
	}

	d3.selectAll('button').on('click', init);

	init();
	</script>
	</body>