javascript - Get direction between two 3d vectors using Three.js? -
i have 2 points:
v1 = (0, 0, 0); v2 = (10, 4, -3);
i want direction between these 2 points can raycast point v1 v2.
how do that?
the pattern follow create direction vector v1
v2
this:
var dir = new three.vector3(); // create once reuse ... dir.subvectors( v2, v1 ).normalize();
direction vectors in three.js assumed have unit-length. in other words, must normalized. if direction vector use when raycasting not have length equal 1, not accurate results.
three.js r.82
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