raycasting on a mesh with altered vertices gives wrong point/distance?

Hello,

First of all my hat off to you guys, your framework is amazing and I’m using it with love in my heart.

I have a terrain mesh which I need to raycast on to determine the walking height for my character. My terrain mesh consists of 16 planes (tiles) that are merged together and is located at (0,0,0). Since every tile needs a different texture I simply create a plane, give it a texture, translate it, alter the vertices height using a perlin function and merge it with the terrain mesh (using GeometryUtils.merge() )

I added the mesh and my character, and then I do a raycast like this:

var ray = new THREE.Ray( player.position.clone().addSelf( new THREE.Vector3(0, 50, 0) ), new THREE.Vector3(0, -1, 0));

var intersects = ray.intersectObject(terrainMesh);

if ( intersects.length > 0 ) {

However, the distance returned from intersects is always 50, even though the vertices from the terrain are raised! What am I doing wrong?

Thanks!

[DustinJSilk]

If anyone else ever finds this - computeCentroids was dropped a long time ago. Also make sure geometry.computeBoundingSphere() is run after altering the vertices

Answer from this StackOverflow question

[aaaidan]

Although, yeah … beware the non-planar quads!

THREE.GeometryUtils.triangulateQuads( geometry );