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flow like the river

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root 2025-11-07 00:06:12 +01:00
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VISUALIZACION/node_modules/ngraph.forcelayout/test/springForce.js generated vendored Executable file
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/* eslint-disable no-shadow */
var test = require('tap').test;
var dimensions = 2;
var createSpringForce = require('../lib/codeGenerators/generateCreateSpringForce')(dimensions);
var Body = require('../lib/codeGenerators/generateCreateBody')(dimensions);
var Spring = require('../lib/spring');
var random = require('ngraph.random')(42);
test('Initialized with default value', function (t) {
t.throws(() => createSpringForce());
t.end();
});
test('Should bump bodies at same position', function (t) {
var body1 = new Body(0, 0);
var body2 = new Body(0, 0);
// length between two bodies is 2, while ideal length is 1. Each body
// should start moving towards each other after force update
var idealLength = 1;
var spring = new Spring(body1, body2, idealLength);
var springForce = createSpringForce({springCoefficient: 0.1, springLength: 1}, random);
springForce.update(spring);
t.ok(body1.force.x > 0, 'Body 1 should go right');
t.ok(body2.force.x < 0, 'Body 2 should go left');
t.end();
});
test('Check spring force direction', function (t) {
var springForce = createSpringForce({springCoefficient: 0.1, springLength: 1});
t.test('Should contract two bodies when ideal length is smaller than actual', function (t) {
var body1 = new Body(-1, 0);
var body2 = new Body(+1, 0);
// length between two bodies is 2, while ideal length is 1. Each body
// should start moving towards each other after force update
var idealLength = 1;
var spring = new Spring(body1, body2, idealLength);
springForce.update(spring);
t.ok(body1.force.x > 0, 'Body 1 should go right');
t.ok(body2.force.x < 0, 'Body 2 should go left');
t.end();
});
t.test('Should repel two bodies when ideal length is larger than actual', function (t) {
var body1 = new Body(-1, 0);
var body2 = new Body(+1, 0);
// length between two bodies is 2, while ideal length is 1. Each body
// should start moving towards each other after force update
var idealLength = 3;
var spring = new Spring(body1, body2, idealLength);
springForce.update(spring);
t.ok(body1.force.x < 0, 'Body 1 should go left');
t.ok(body2.force.x > 0, 'Body 2 should go right');
t.end();
});
t.end();
});