kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
37 lines (33 loc) • 9.41 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
// Copyright (c) 2018 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';
exports.default = {
name: 'brushing',
vs: vs,
getUniforms: getUniforms
};
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