ray and segment intersect #151 / Alex Bol

Computational geometry and data visualization

Public

Edited

Sep 10, 2023

md`# ray and segment intersect #151`

{

const { point, vector, box, segment, ray } = Flatten;

let scene_box = box(0, 0, width, height);

// Define data model

let model = {

shape: segment(point(636, 281.5), point(336, 281.5)),

ray: ray(point(486, 271), vector(-71.147335, -70.2713)),

intersection_points: undefined,

get_intersections: function () {

this.intersection_points = this.ray.intersect(this.shape);

svg: function () {

let svg = this.shape.svg();

svg += this.shape.vertices.map((pt) => pt.svg({ fill: "blue" }));

svg += this.ray.svg(scene_box, { strokeDasharray: 1 });

svg += this.ray.start.svg({ fill: "red" });

svg += this.intersection_points.map((pt) => pt.svg({ fill: "green" }));

return svg;

}

};

model.get_intersections();

// Create stage and display svg

const stage = d3.select(DOM.svg(width, height));

stage.html(model.svg());

return stage.node();

}

height = 400

Flatten = require("@flatten-js/core@1.4.3")

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