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Merge pull request #1082 from OpenGeoscience/grid-feature
feat: Add a grid feature
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,175 @@ | ||
| var inherit = require('./inherit'); | ||
| var meshFeature = require('./meshFeature'); | ||
|
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| /** | ||
| * Grid feature specification. | ||
| * | ||
| * @typedef {geo.feature.spec} geo.gridFeature.spec | ||
| * @extends geo.feature.spec | ||
| * @property {object[]} [data=[]] An array of arbitrary objects used to | ||
| * construct the feature. | ||
| * @property {geo.gridFeature.styleSpec} [style] An object that contains | ||
| * style values for the feature. | ||
| * @property {geo.gridFeature.gridSpec} [grid] The grid specification for the | ||
| * feature. | ||
| */ | ||
|
|
||
| /** | ||
| * Style specification for a grid feature. | ||
| * | ||
| * @typedef {geo.feature.styleSpec} geo.gridFeature.styleSpec | ||
| * @extends geo.feature.styleSpec | ||
| * @property {geo.geoPosition|function} [position=data] The position of each | ||
| * data element. This defaults to just using `x`, `y`, and `z` properties | ||
| * of the data element itself. The position is in the feature's gcs | ||
| * coordinates. | ||
| * @property {number|function} [value=data.z] The value of each data element. | ||
| * This defaults to the `z` property of the data elements. If the value of | ||
| * a grid point is `null` or `undefined`, the point and elements that use | ||
| * that point won't be included in the results. | ||
| * @property {number|function} [opacity=1] The opacity for the whole feature on | ||
| * a scale of 0 to 1. | ||
| * @property {number[]|function} [origin] Origin in map gcs coordinates used | ||
| * for to ensure high precision drawing in this location. When called as a | ||
| * function, this is passed the vertex positions as a single continuous array | ||
| * in map gcs coordinates. It defaults to the first vertex used in the | ||
| * grid. | ||
| */ | ||
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| /** | ||
| * Grid specification. All of these properties can be functions, which get | ||
| * passed the {@link geo.meshFeature.meshInfo} object. | ||
| * | ||
| * @typedef {geo.meshFeature.meshSpec} geo.gridFeature.gridSpec | ||
| * @extends geo.meshFeature.meshSpec | ||
| * @property {number} [min] Minimum grid value. If unspecified, taken from | ||
| * the computed minimum of the `value` style. | ||
| * @property {number} [max] Maximum grid value. If unspecified, taken from | ||
| * the computed maximum of the `value` style. | ||
| * @property {geo.geoColor} [minColor='black'] Color used for any value below | ||
| * the minimum. | ||
| * @property {number} [minOpacity=0] Opacity used for any value below the | ||
| * minimum. | ||
| * @property {geo.geoColor} [maxColor='black'] Color used for any value above | ||
| * the maximum. | ||
| * @property {number} [maxOpacity=0] Opacity used for any value above the | ||
| * maximum. | ||
| * @property {boolean} [stepped] If falsy but not `undefined`, smooth | ||
| * transitions between colors. | ||
| * @property {geo.geoColor[]} [colorRange=<color table>] An array of colors | ||
| * used to show the range of values. The default is a 9-step color table. | ||
| * @property {number[]} [opacityRange] An array of opacities used to show the | ||
| * range of values. If unspecified, the opacity is 1. If this is a shorter | ||
| * list than the `colorRange`, an opacity of 1 is used for the entries near | ||
| * the end of the color range. | ||
| * @property {number[]} [rangeValues] An array used to map values to the | ||
| * `colorRange`. By default, values are spaced linearly. If specified, the | ||
| * entries must be increasing weakly monotonic, and there must be one more | ||
| * entry then the length of `colorRange`. | ||
| */ | ||
|
|
||
| /** | ||
| * Computed grid information. | ||
| * | ||
| * @typedef {geo.meshFeature.meshColoredInfo} geo.gridFeature.gridInfo | ||
| * @extends geo.meshFeature.meshColoredInfo | ||
| */ | ||
|
|
||
| /** | ||
| * Create a new instance of class gridFeature. | ||
| * | ||
| * @class | ||
| * @alias geo.gridFeature | ||
| * @extends geo.meshFeature | ||
| * | ||
| * @borrows geo.gridFeature#mesh as geo.gridFeature#grid | ||
| * | ||
| * @param {geo.gridFeature.spec} arg | ||
| * @returns {geo.gridFeature} | ||
| */ | ||
| var gridFeature = function (arg) { | ||
| 'use strict'; | ||
| if (!(this instanceof gridFeature)) { | ||
| return new gridFeature(arg); | ||
| } | ||
|
|
||
| var $ = require('jquery'); | ||
| var util = require('./util'); | ||
| var meshUtil = require('./util/mesh'); | ||
|
|
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| arg = arg || {}; | ||
| meshFeature.call(this, arg); | ||
|
|
||
| /** | ||
| * @private | ||
| */ | ||
| var m_this = this, | ||
| s_init = this._init; | ||
|
|
||
| /** | ||
| * Create a set of vertices and values and opacities inside triangles. | ||
| * Create a set of triangles of indices into the vertex array. Create a | ||
| * color and opacity map corresponding to the values. | ||
| * | ||
| * @returns {geo.gridFeature.gridInfo} An object with the grid | ||
| * information. | ||
| */ | ||
| this._createGrids = function () { | ||
| return meshUtil.createColoredMesh(m_this, true); | ||
| }; | ||
|
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| this.grid = m_this.mesh; | ||
|
|
||
| /** | ||
| * Initialize. | ||
| * | ||
| * @param {geo.gridFeature.spec} arg The grid feature specification. | ||
| */ | ||
| this._init = function (arg) { | ||
| s_init.call(m_this, arg); | ||
|
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||
| var defaultStyle = $.extend( | ||
| {}, | ||
| { | ||
| opacity: 1.0, | ||
| value: function (d, i) { | ||
| return util.isNonNullFinite(d) ? d : m_this.position()(d, i).z; | ||
| }, | ||
| position: (d) => d || {x: 0, y: 0}, | ||
| origin: (p) => (p.length >= 3 ? [p[0], p[1], 0] : [0, 0, 0]) | ||
| }, | ||
| arg.style === undefined ? {} : arg.style | ||
| ); | ||
|
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| m_this.style(defaultStyle); | ||
|
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| m_this.grid($.extend({}, { | ||
| minColor: 'black', | ||
| minOpacity: 0, | ||
| maxColor: 'black', | ||
| maxOpacity: 0, | ||
| /* 9-step based on paraview bwr colortable */ | ||
| colorRange: [ | ||
| {r: 0.07514311, g: 0.468049805, b: 1}, | ||
| {r: 0.468487184, g: 0.588057293, b: 1}, | ||
| {r: 0.656658579, g: 0.707001303, b: 1}, | ||
| {r: 0.821573924, g: 0.837809045, b: 1}, | ||
| {r: 0.943467973, g: 0.943498599, b: 0.943398095}, | ||
| {r: 1, g: 0.788626485, b: 0.750707739}, | ||
| {r: 1, g: 0.6289553, b: 0.568237474}, | ||
| {r: 1, g: 0.472800903, b: 0.404551679}, | ||
| {r: 0.916482116, g: 0.236630659, b: 0.209939162} | ||
| ] | ||
| }, arg.mesh || {}, arg.grid || {})); | ||
|
|
||
| if (arg.mesh || arg.grid) { | ||
| m_this.dataTime().modified(); | ||
| } | ||
| }; | ||
|
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| this._init(arg); | ||
| return this; | ||
| }; | ||
|
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| inherit(gridFeature, meshFeature); | ||
| module.exports = gridFeature; |
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