mirror of
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51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
// jshint esversion: 6
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const mat4 = require("gl-mat4");
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// opacity: https://github.com/spacetx/starfish/blob/master/viz/draw/regions.js
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export default function(regl) {
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return regl({
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vert: `
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precision mediump float;
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attribute vec2 position;
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attribute vec3 color;
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attribute float size;
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uniform float distance;
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uniform mat4 projection, view;
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varying vec3 fragColor;
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void main() {
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gl_PointSize = 7.0 / pow(distance, 2.5) + size;
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gl_Position = projection * view * vec4(position.x, -position.y, 0, 1);
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fragColor = color;
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}`,
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frag: `
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precision mediump float;
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varying vec3 fragColor;
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void main() {
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if (length(gl_PointCoord.xy - 0.5) > 0.5) {
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discard;
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}
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gl_FragColor = vec4(fragColor, 1);
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}`,
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attributes: {
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position: regl.prop("position"),
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color: regl.prop("color"),
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size: regl.prop("size")
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},
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uniforms: {
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distance: regl.prop("distance"),
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view: regl.prop("view"),
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projection: (context, props) => {
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return mat4.perspective([], Math.PI / 2, 1, 0.01, 1000);
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}
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},
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count: regl.prop("count"),
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primitive: "points"
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});
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}
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