Published
Edited
Oct 4, 2018
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3D
svgElem = svg`
<svg width=800 height=500>
</svg>
`
svgNode = {
var origin = [480, 300], scale = 20, j = 10, cubesData = [], alpha = 0, beta = 0, startAngle = Math.PI/6;
var svgNode = d3.select(svgElem).call(d3.drag().on('drag', dragged).on('start', dragStart).on('end', dragEnd)).append('g');
var color = d3.scaleOrdinal(d3.schemeCategory20);
var cubesGroup = svgNode.append('g').attr('class', 'cubes');
var mx, my, mouseX, mouseY;
var cubes3D = d33d._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(d33d._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();
yield svgNode.node();
}
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