There are two points that I need to consider:
v1 = (0, 0, 0);
v2 = (10, 4, -3);
I am looking to determine the direction between these two points in order to perform a raycast from point v1 to v2.
Can someone guide me on how to achieve this?
There are two points that I need to consider:
v1 = (0, 0, 0);
v2 = (10, 4, -3);
I am looking to determine the direction between these two points in order to perform a raycast from point v1 to v2.
Can someone guide me on how to achieve this?
To create a direction vector from v1
to v2
, follow this pattern:
var dir = new THREE.Vector3(); // create it once and reuse
...
dir.subVectors( v2, v1 ).normalize();
In three.js, direction vectors are expected to be unit-length. In other words, they need to be normalized. If the direction vector used for raycasting is not of length 1, the results will not be accurate.
Version: three.js r.82
Let's delve into a bit of geometry: direction can be calculated as the difference between vector 2 and vector 1
Also, taking a peek at some ThreeJS documentation might help: https://threejs.org/docs/#api/math/Vector3
Voilà! Problem solved!
var direction = new THREE.Vector3();
direction.subVectors( v2, v1 ) ;
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