zthxxx · March 4, 2019 08:07
diff --git a/D3js5.9-Threejs102-WebGL-force-directed-graph.html b/D3js5.9-Threejs102-WebGL-force-directed-graph.html
 <!DOCTYPE html>
 <html>
  <head>
    <title></title>
    <style>
        #root,
        body,
        html {
          width: 100%;
          height: 100%;
        }

        body {
          margin: 0;
        }
        
        .render-screen,
        canvas { 
          width: 100%; 
          height: 100% 
        }

        #states {
          position: fixed; 
          top: 0px; 
          left: 0px; 
          cursor: pointer; 
          opacity: 0.9; 
          z-index: 10000;
        }
    </style>
  </head>
  <div class='render-screen' id='render-screen'>
    <canvas id='canvas'></canvas>
  </div>
  <body>

 <script type="x-shader/x-vertex" id="pointVertexShader">
  attribute float size;

  uniform vec3 color;
  uniform float alpha;
  uniform float zoom;
  
  varying vec4 vColor;

  void main() {
    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
    gl_PointSize = size * zoom;
    vColor = vec4(color, alpha);
  }
 </script>

 <script type="x-shader/x-fragment" id="pointFragmentShader">
  varying vec4 vColor;
  void main() {
    vec2 center = vec2(0.5, 0.5);
    float r = abs(distance(gl_PointCoord, center));
    if (r > 0.5) {
        discard;
        return;
    }
    gl_FragColor = vColor;
  }
 </script>

 <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.9.1/d3.min.js" charset="utf-8"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/102/three.min.js" charset="utf-8"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/stats.js/r16/Stats.min.js" charset="utf-8"></script>
 <script src="http://threejs.org/examples/js/controls/OrbitControls.js" charset="utf-8"></script>

 <script>
 const particles = 100;

 // D3.js config

 const nodes = d3.range(particles).map(d => ({ 
    id: d,
 }))
 const links = d3.range(particles).map(d => ({ 
    source: ~~(Math.random() * particles), 
    target: ~~(Math.random() * particles), 
 }))

 const nodeIndex = new Map()
 const linksIndex = [];

 nodes.map((node, index) => nodeIndex.set(node.id, index))
 links.map(({source, target}) => linksIndex.push(nodeIndex.get(source), nodeIndex.get(target)))


 const sizes = new Float32Array(particles);

 const mouseNode = nodes[particles-1]


 function charge(d, i) {
  if (d === mouseNode) {
    return -500
  }
  return -sizes[i] * 8
 }

 function gravity(d, i) {
  if (d === mouseNode) {
    return 50
  }
  return sizes[i] * 0.1
 }


 for(let i = 0; i < particles; i++) sizes[i] = Math.random() * 10 + 3;


 const simulation = d3.forceSimulation(nodes)
  .alphaTarget(0.3)
  .force('link', d3.forceLink(links).id(d => d.id))
  .force("charge", d3.forceManyBody().strength(charge).distanceMax(100))
  .force("gravity", d3.forceManyBody().strength(gravity).distanceMin(10))
  // .force("center", d3.forceCenter(0, 0))





 // ------ Three.js config ----------

 const renderScreen = document.getElementById('render-screen')
 const canvas = document.getElementById('canvas')


 const positions = new Float32Array(particles * 3);

 const scene = new THREE.Scene()
 const camera = new THREE.OrthographicCamera(renderScreen.clientWidth / - 2, renderScreen.clientWidth / 2, renderScreen.clientHeight / 2, renderScreen.clientHeight / - 2, 1, 10000)
 scene.add(camera)
 camera.position.z = 1000

 function uniforms(opts) {
  opts = opts || {}
  return {
    color: {
      type: 'c',
      value: new THREE.Color(0x3498db)
    },
    alpha: { type: 'f', value: 0.9 },
    zoom: { type: 'f', value: camera.zoom },
  }
 }


 const pointGeom = new THREE.BufferGeometry();

 pointGeom.addAttribute('position', new THREE.BufferAttribute(positions, 3));
 pointGeom.addAttribute('size', new THREE.BufferAttribute(sizes, 1));


 const pointMaterial = new THREE.ShaderMaterial({
    uniforms:       uniforms(),
    vertexShader:   d3.select('#pointVertexShader').node().textContent,
    fragmentShader: d3.select('#pointFragmentShader').node().textContent,
    transparent:    true,
 })

 // const pointMaterial = new THREE.PointsMaterial( { size: 15, sizeAttenuation: false, color: 0x3498db  } );


 const points = new THREE.Points(pointGeom, pointMaterial);


 const lineGeom = new THREE.BufferGeometry();

 lineGeom.addAttribute('position', new THREE.BufferAttribute(positions, 3));
 lineGeom.setIndex(new THREE.BufferAttribute(new Uint16Array(linksIndex), 1));

 var lineMaterial = new THREE.LineBasicMaterial( { color: 0x14689b } );
 const lines = new THREE.LineSegments(lineGeom, lineMaterial);

 scene.add(lines)
 scene.add(points)




 const renderer = new THREE.WebGLRenderer({alpha: true, canvas});
 const controls = new THREE.OrbitControls( camera, renderer.domElement );

 renderer.setSize(renderScreen.clientWidth, renderScreen.clientHeight)


 function updateThreePos() {
    for (let i = 0; i < nodes.length; i++) {
        positions[i * 3] = nodes[i].x
        positions[i * 3 + 1] = nodes[i].y
    }
    pointGeom.attributes.position.needsUpdate = true;
    lineGeom.attributes.position.needsUpdate = true;
 }

 function updateScreenSize() {
  camera.right = renderScreen.clientWidth / 2
  camera.left = -camera.right
  camera.top = renderScreen.clientHeight / 2
  camera.bottom = -camera.top
  controls.update()
  renderer.setSize(renderScreen.clientWidth, renderScreen.clientHeight)
 }

 function updateCamera() {
  pointMaterial.uniforms.zoom.value = camera.zoom;
 }

 controls.addEventListener( 'change', updateCamera );




 // -------- run  -------------
 stats = new Stats();
 stats.domElement.id = 'states';
 renderScreen.appendChild( stats.domElement );

 function updateMousePos() {
  const pos = d3.mouse(this)
  mouseNode.fx = (pos[0] - renderScreen.clientWidth / 2) / camera.zoom;
  mouseNode.fy = (renderScreen.clientHeight / 2 - pos[1]) / camera.zoom;
 }


 function onTicked() {
    updateThreePos();
    renderer.render(scene, camera);
    stats.update();
 }

 simulation.on('tick', onTicked)
 d3.select('#canvas').on('mousemove', updateMousePos)
 d3.select(window).on('resize', updateScreenSize)

 </script>
  </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title></title>
	<style>
	#root,
	body,
	html {
	width: 100%;
	height: 100%;
	}

	body {
	margin: 0;
	}

	.render-screen,
	canvas {
	width: 100%;
	height: 100%
	}

	#states {
	position: fixed;
	top: 0px;
	left: 0px;
	cursor: pointer;
	opacity: 0.9;
	z-index: 10000;
	}
	</style>
	</head>
	<div class='render-screen' id='render-screen'>
	<canvas id='canvas'></canvas>
	</div>
	<body>

	<script type="x-shader/x-vertex" id="pointVertexShader">
	attribute float size;

	uniform vec3 color;
	uniform float alpha;
	uniform float zoom;

	varying vec4 vColor;

	void main() {
	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
	gl_PointSize = size * zoom;
	vColor = vec4(color, alpha);
	}
	</script>

	<script type="x-shader/x-fragment" id="pointFragmentShader">
	varying vec4 vColor;
	void main() {
	vec2 center = vec2(0.5, 0.5);
	float r = abs(distance(gl_PointCoord, center));
	if (r > 0.5) {
	discard;
	return;
	}
	gl_FragColor = vColor;
	}
	</script>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.9.1/d3.min.js" charset="utf-8"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/102/three.min.js" charset="utf-8"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/stats.js/r16/Stats.min.js" charset="utf-8"></script>
	<script src="http://threejs.org/examples/js/controls/OrbitControls.js" charset="utf-8"></script>

	<script>
	const particles = 100;

	// D3.js config

	const nodes = d3.range(particles).map(d => ({
	id: d,
	}))
	const links = d3.range(particles).map(d => ({
	source: ~~(Math.random() * particles),
	target: ~~(Math.random() * particles),
	}))

	const nodeIndex = new Map()
	const linksIndex = [];

	nodes.map((node, index) => nodeIndex.set(node.id, index))
	links.map(({source, target}) => linksIndex.push(nodeIndex.get(source), nodeIndex.get(target)))


	const sizes = new Float32Array(particles);

	const mouseNode = nodes[particles-1]


	function charge(d, i) {
	if (d === mouseNode) {
	return -500
	}
	return -sizes[i] * 8
	}

	function gravity(d, i) {
	if (d === mouseNode) {
	return 50
	}
	return sizes[i] * 0.1
	}


	for(let i = 0; i < particles; i++) sizes[i] = Math.random() * 10 + 3;


	const simulation = d3.forceSimulation(nodes)
	.alphaTarget(0.3)
	.force('link', d3.forceLink(links).id(d => d.id))
	.force("charge", d3.forceManyBody().strength(charge).distanceMax(100))
	.force("gravity", d3.forceManyBody().strength(gravity).distanceMin(10))
	// .force("center", d3.forceCenter(0, 0))





	// ------ Three.js config ----------

	const renderScreen = document.getElementById('render-screen')
	const canvas = document.getElementById('canvas')


	const positions = new Float32Array(particles * 3);

	const scene = new THREE.Scene()
	const camera = new THREE.OrthographicCamera(renderScreen.clientWidth / - 2, renderScreen.clientWidth / 2, renderScreen.clientHeight / 2, renderScreen.clientHeight / - 2, 1, 10000)
	scene.add(camera)
	camera.position.z = 1000

	function uniforms(opts) {
	opts = opts \|\| {}
	return {
	color: {
	type: 'c',
	value: new THREE.Color(0x3498db)
	},
	alpha: { type: 'f', value: 0.9 },
	zoom: { type: 'f', value: camera.zoom },
	}
	}


	const pointGeom = new THREE.BufferGeometry();

	pointGeom.addAttribute('position', new THREE.BufferAttribute(positions, 3));
	pointGeom.addAttribute('size', new THREE.BufferAttribute(sizes, 1));


	const pointMaterial = new THREE.ShaderMaterial({
	uniforms: uniforms(),
	vertexShader: d3.select('#pointVertexShader').node().textContent,
	fragmentShader: d3.select('#pointFragmentShader').node().textContent,
	transparent: true,
	})

	// const pointMaterial = new THREE.PointsMaterial( { size: 15, sizeAttenuation: false, color: 0x3498db } );


	const points = new THREE.Points(pointGeom, pointMaterial);


	const lineGeom = new THREE.BufferGeometry();

	lineGeom.addAttribute('position', new THREE.BufferAttribute(positions, 3));
	lineGeom.setIndex(new THREE.BufferAttribute(new Uint16Array(linksIndex), 1));

	var lineMaterial = new THREE.LineBasicMaterial( { color: 0x14689b } );
	const lines = new THREE.LineSegments(lineGeom, lineMaterial);

	scene.add(lines)
	scene.add(points)




	const renderer = new THREE.WebGLRenderer({alpha: true, canvas});
	const controls = new THREE.OrbitControls( camera, renderer.domElement );

	renderer.setSize(renderScreen.clientWidth, renderScreen.clientHeight)


	function updateThreePos() {
	for (let i = 0; i < nodes.length; i++) {
	positions[i * 3] = nodes[i].x
	positions[i * 3 + 1] = nodes[i].y
	}
	pointGeom.attributes.position.needsUpdate = true;
	lineGeom.attributes.position.needsUpdate = true;
	}

	function updateScreenSize() {
	camera.right = renderScreen.clientWidth / 2
	camera.left = -camera.right
	camera.top = renderScreen.clientHeight / 2
	camera.bottom = -camera.top
	controls.update()
	renderer.setSize(renderScreen.clientWidth, renderScreen.clientHeight)
	}

	function updateCamera() {
	pointMaterial.uniforms.zoom.value = camera.zoom;
	}

	controls.addEventListener( 'change', updateCamera );




	// -------- run -------------
	stats = new Stats();
	stats.domElement.id = 'states';
	renderScreen.appendChild( stats.domElement );

	function updateMousePos() {
	const pos = d3.mouse(this)
	mouseNode.fx = (pos[0] - renderScreen.clientWidth / 2) / camera.zoom;
	mouseNode.fy = (renderScreen.clientHeight / 2 - pos[1]) / camera.zoom;
	}


	function onTicked() {
	updateThreePos();
	renderer.render(scene, camera);
	stats.update();
	}

	simulation.on('tick', onTicked)
	d3.select('#canvas').on('mousemove', updateMousePos)
	d3.select(window).on('resize', updateScreenSize)

	</script>
	</body>
	</html>