239 lines
8.7 KiB
JavaScript
239 lines
8.7 KiB
JavaScript
import { isNumber } from './';
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import { getEdgeTerminal } from './math';
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/**
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* 将 number | Function 类型的参数转换为 return number 的 Function
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* @param {number | Function} value 需要被转换的值
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* @param {number} defaultV 返回函数的默认返回值
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* @return {Function} 转换后的函数
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*/
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export const proccessToFunc = (value, defaultV) => {
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let func;
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if (!value) {
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func = () => {
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return defaultV || 1;
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};
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}
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else if (isNumber(value)) {
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func = () => {
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return value;
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};
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}
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else {
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func = value;
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}
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return func;
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};
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/**
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* 将节点和边数据转换为 GPU 可读的数组。并返回 maxEdgePerVetex，每个节点上最多的边数
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* @param {NodeConfig[]} nodes 需要被转换的值
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* @param {EdgeConfig[]} edges 返回函数的默认返回值
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* @return {Object} 转换后的数组及 maxEdgePerVetex 组成的对象
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*/
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export const buildTextureData = (nodes, edges) => {
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const dataArray = [];
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const nodeDict = [];
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const mapIdPos = {};
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let i = 0;
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for (i = 0; i < nodes.length; i++) {
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const n = nodes[i];
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mapIdPos[n.id] = i;
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dataArray.push(n.x);
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dataArray.push(n.y);
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dataArray.push(0);
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dataArray.push(0);
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nodeDict.push([]);
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}
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for (i = 0; i < edges.length; i++) {
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const e = edges[i];
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const source = getEdgeTerminal(e, 'source');
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const target = getEdgeTerminal(e, 'target');
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if (!isNaN(mapIdPos[source]) && !isNaN(mapIdPos[target])) {
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nodeDict[mapIdPos[source]].push(mapIdPos[target]);
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nodeDict[mapIdPos[target]].push(mapIdPos[source]);
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}
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}
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let maxEdgePerVetex = 0;
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for (i = 0; i < nodes.length; i++) {
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const offset = dataArray.length;
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const dests = nodeDict[i];
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const len = dests.length;
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dataArray[i * 4 + 2] = offset;
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dataArray[i * 4 + 3] = len;
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maxEdgePerVetex = Math.max(maxEdgePerVetex, len);
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for (let j = 0; j < len; ++j) {
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const dest = dests[j];
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dataArray.push(+dest);
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}
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}
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while (dataArray.length % 4 !== 0) {
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dataArray.push(0);
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}
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return {
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maxEdgePerVetex,
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array: new Float32Array(dataArray),
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};
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};
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/**
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* 将节点和边数据转换为 GPU 可读的数组，每条边带有一个属性。并返回 maxEdgePerVetex，每个节点上最多的边数
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* @param {NodeConfig[]} nodes 节点数组
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* @param {EdgeConfig[]} edges 边数组
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* @param {Function} attrs 读取边属性的函数
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* @return {Object} 转换后的数组及 maxEdgePerVetex 组成的对象
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*/
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// export const buildTextureDataWithOneEdgeAttr = (nodes: OutNode[], edges: Edge[], attrs: Function): {
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// array: Float32Array,
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// maxEdgePerVetex: number
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// } => {
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// const dataArray = [];
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// const nodeDict: any = [];
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// const mapIdPos: IndexMap = {};
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// let i = 0;
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// for (i = 0; i < nodes.length; i++) {
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// const n = nodes[i];
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// mapIdPos[n.id] = i;
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// dataArray.push(n.x);
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// dataArray.push(n.y);
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// dataArray.push(0);
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// dataArray.push(0);
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// nodeDict.push([]);
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// }
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// for (i = 0; i < edges.length; i++) {
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// const e = edges[i];
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// nodeDict[mapIdPos[e.source]].push(mapIdPos[e.target]);
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// nodeDict[mapIdPos[e.source]].push(attrs(e)); // 理想边长，后续可以改成每条边不同
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// nodeDict[mapIdPos[e.target]].push(mapIdPos[e.source]);
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// nodeDict[mapIdPos[e.target]].push(attrs(e)); // 理想边长，后续可以改成每条边不同
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// }
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// let maxEdgePerVetex = 0;
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// for (i = 0; i < nodes.length; i++) {
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// const offset: number = dataArray.length;
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// const dests = nodeDict[i]; // dest 中节点 id 与边长间隔存储，即一位节点 id，一位边长……
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// const len = dests.length;
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// dataArray[i * 4 + 2] = offset;
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// dataArray[i * 4 + 3] = len / 2; // 第四位存储与该节点相关的所有节点个数
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// maxEdgePerVetex = Math.max(maxEdgePerVetex, len / 2);
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// for (let j = 0; j < len; ++j) {
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// const dest = dests[j];
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// dataArray.push(+dest);
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// }
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// }
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// // 不是 4 的倍数，填充 0
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// while (dataArray.length % 4 !== 0) {
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// dataArray.push(0);
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// }
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// return {
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// array: new Float32Array(dataArray),
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// maxEdgePerVetex
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// }
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// }
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/**
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* 将节点和边数据转换为 GPU 可读的数组，每条边带有一个以上属性。并返回 maxEdgePerVetex，每个节点上最多的边数
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* @param {NodeConfig[]} nodes 节点数组
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* @param {EdgeConfig[]} edges 边数组
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* @param {Function} attrs 读取边属性的函数
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* @return {Object} 转换后的数组及 maxEdgePerVetex 组成的对象
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*/
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export const buildTextureDataWithTwoEdgeAttr = (nodes, edges, attrs1, attrs2) => {
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const dataArray = [];
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const nodeDict = [];
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const mapIdPos = {};
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let i = 0;
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for (i = 0; i < nodes.length; i++) {
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const n = nodes[i];
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mapIdPos[n.id] = i;
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dataArray.push(n.x);
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dataArray.push(n.y);
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dataArray.push(0);
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dataArray.push(0);
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nodeDict.push([]);
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}
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for (i = 0; i < edges.length; i++) {
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const e = edges[i];
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const source = getEdgeTerminal(e, 'source');
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const target = getEdgeTerminal(e, 'target');
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nodeDict[mapIdPos[source]].push(mapIdPos[target]);
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nodeDict[mapIdPos[source]].push(attrs1(e));
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nodeDict[mapIdPos[source]].push(attrs2(e));
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nodeDict[mapIdPos[source]].push(0);
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nodeDict[mapIdPos[target]].push(mapIdPos[source]);
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nodeDict[mapIdPos[target]].push(attrs1(e));
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nodeDict[mapIdPos[target]].push(attrs2(e));
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nodeDict[mapIdPos[target]].push(0);
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}
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let maxEdgePerVetex = 0;
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for (i = 0; i < nodes.length; i++) {
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const offset = dataArray.length;
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const dests = nodeDict[i]; // dest 中节点 id 与边长间隔存储，即一位节点 id，一位边长……
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const len = dests.length;
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// dataArray[i * 4 + 2] = offset;
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// dataArray[i * 4 + 3] = len / 4; // 第四位存储与该节点相关的所有节点个数
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// pack offset & length into float32: offset 20bit, length 12bit
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dataArray[i * 4 + 2] = offset + 1048576 * len / 4;
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dataArray[i * 4 + 3] = 0; // 第四位存储与上一次的距离差值
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maxEdgePerVetex = Math.max(maxEdgePerVetex, len / 4);
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for (let j = 0; j < len; ++j) {
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const dest = dests[j];
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dataArray.push(+dest);
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}
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}
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// 不是 4 的倍数，填充 0
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while (dataArray.length % 4 !== 0) {
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dataArray.push(0);
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}
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return {
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maxEdgePerVetex,
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array: new Float32Array(dataArray),
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};
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};
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/**
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* transform the extended attributes of nodes or edges to a texture array
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* @param {string[]} attributeNames attributes' name to be read from items and put into output array
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* @param {ModelConfig[]} items the items to be read
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* @return {Float32Array} the attributes' value array to be read by GPU
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*/
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export const attributesToTextureData = (attributeNames, items) => {
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const dataArray = [];
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const attributeNum = attributeNames.length;
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const attributteStringMap = {};
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items.forEach((item) => {
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attributeNames.forEach((name, i) => {
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if (attributteStringMap[item[name]] === undefined) {
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attributteStringMap[item[name]] = Object.keys(attributteStringMap).length;
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}
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dataArray.push(attributteStringMap[item[name]]);
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// insure each node's attributes take inter number of grids
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if (i === attributeNum - 1) {
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while (dataArray.length % 4 !== 0) {
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dataArray.push(0);
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}
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}
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});
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});
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return {
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array: new Float32Array(dataArray),
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count: Object.keys(attributteStringMap).length
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};
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};
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/**
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* transform the number array format of extended attributes of nodes or edges to a texture array
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* @param {string[]} attributeNames attributes' name to be read from items and put into output array
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* @return {Float32Array} the attributes' value array to be read by GPU
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*/
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export const arrayToTextureData = (valueArrays) => {
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const dataArray = [];
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const attributeNum = valueArrays.length;
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const itemNum = valueArrays[0].length;
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for (let j = 0; j < itemNum; j++) {
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valueArrays.forEach((valueArray, i) => {
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dataArray.push(valueArray[j]);
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// insure each node's attributes take inter number of grids
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if (i === attributeNum - 1) {
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while (dataArray.length % 4 !== 0) {
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dataArray.push(0);
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}
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}
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});
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}
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return new Float32Array(dataArray);
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};
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//# sourceMappingURL=gpu.js.map
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