kepler.gl.geoiq/dist/shaderlib/brushing-module.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

// Copyright (c) 2023 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
function getUniforms() {
  return {};
}

var vs = "uniform vec2 brushing_uMousePosition;\nuniform float brushing_uBrushRadius;\nuniform float brushing_uBrushSource;\nuniform float brushing_uBrushTarget;\nuniform float brushing_uEnableBrushing;\nuniform float brushing_uStrokeScale;\nuniform float brushing_uOutsideBrushRadius;\n\nconst float R_EARTH = 6371000.; // earth radius in meter\n// const float PI = 3.1415926538;\n\n// approximate distance between lng lat in meters\nfloat distanceBetweenLatLng(vec2 source, vec2 target) {\n  float PI = 3.1415926538;\n  vec2 delta = (source - target) * PI / 180.;\n\n  float a =\n    sin(delta.y / 2.) * sin(delta.y / 2.) +\n    cos(source.y * PI / 180.) * cos(target.y * PI / 180.) *\n    sin(delta.x / 2.) * sin(delta.x / 2.);\n\n  float c = 2. * atan(sqrt(a), sqrt(1. - a));\n\n  return R_EARTH * c;\n}\n\n// range is km\nfloat isPointInRange(vec2 ptLatLng, float enabled) {\n  return float(enabled <= 0. || distanceBetweenLatLng(ptLatLng, brushing_uMousePosition) <= brushing_uBrushRadius);\n}\n\nvec2 getExtrusionOffset(vec2 line_clipspace, vec2 viewportSize, float offset_direction, float lineWidth) {\n  // normalized direction of the line\n  vec2 dir_screenspace = normalize(line_clipspace * viewportSize);\n  // rotate by 90 degrees\n  dir_screenspace = vec2(-dir_screenspace.y, dir_screenspace.x);\n\n  vec2 offset_screenspace = dir_screenspace * offset_direction * lineWidth / 2.0;\n  vec2 offset_clipspace = offset_screenspace / viewportSize * 2.0;\n\n  return offset_clipspace;\n}\n\nvec2 brushing_getExtrusionOffset(\n  vec2 line_clipspace,\n  float offset_direction,\n  vec2 viewportSize,\n  vec4 instancePositions, \n  float instanceStrokeWidth\n) {\n  float isSourceInBrush = isPointInRange(instancePositions.xy, brushing_uBrushSource);\n  float isTargetInBrush = isPointInRange(instancePositions.zw, brushing_uBrushTarget);\n  \n  float isInBrush = float(brushing_uEnableBrushing <= 0. ||\n  (brushing_uBrushSource * isSourceInBrush > 0. || brushing_uBrushTarget * isTargetInBrush > 0.));\n  \n  float strokeWidth = brushing_uStrokeScale * instanceStrokeWidth;\n\n  float finalWidth = mix(0.0, strokeWidth, isInBrush);\n\n  // extrude\n  return getExtrusionOffset(line_clipspace, viewportSize, offset_direction, finalWidth);\n}\n\nfloat brushing_getRadius(\n  vec3 instancePositions,\n  float instanceRadius\n) {\n  float isPtInBrush = isPointInRange(instancePositions.xy, brushing_uEnableBrushing);\n  return mix(brushing_uOutsideBrushRadius, instanceRadius, isPtInBrush);\n}\n";

var _default = exports["default"] = {
  name: 'brushing',
  vs: vs,
  getUniforms: getUniforms
};
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