function getAnimationAttributes (positions, cells) {
const directions = []
const centroids = []
for (let i=0; i<cells.length; i++) {
const [ f0, f1, f2 ] = cells[i]
const triangle = [ positions[f0], positions[f1], positions[f2] ]
const center = triangleCentroid(triangle)
const dir = new THREE.Vector3().fromArray(center)
centroids.push(dir, dir, dir)
const random = randomVec3([], Math.random())
const anim = new THREE.Vector3().fromArray(random)
directions.push(anim, anim, anim)
}
return {
direction: { type: 'v3', value: directions },
centroid: { type: 'v3', value: centroids }
}
}
var gifts = array(amount).map(function(i) {
var mesh = gift.clone()
var newMats = mesh.material.materials.map(function(mat) {
if (/ribbon/i.test(mat.name)) {
mat = mat.clone()
mat.color = new THREE.Color(colors[i%colors.length])
}
return mat
})
mesh.material = new THREE.MeshFaceMaterial(newMats)
var giftObj = new THREE.Object3D()
giftObj.add(mesh)
// var hover = geoMesh.clone()
var meshObj = new THREE.Object3D()
meshObj.scale.multiplyScalar(MIN_SCALE)
meshObj.add(giftObj)
// meshObj.add(hover)
var s = randf(0.08, 0.35)
TweenMax.to(meshObj.scale, 1.0, {
x: s * randf(0.95,1.05), y: s * randf(0.95,1.05), z: s,
delay: delay+=0.02
})
// hover.visible = false
mesh.position.y = -0.4 //fix model to origin
var pos = random([0, 0, 0], 10)
meshObj.position.fromArray(pos)
meshObj.rotation.x = randf(-Math.PI*2, Math.PI*2)
meshObj.rotation.y = randf(-Math.PI*2, Math.PI*2)
meshObj.rotation.z = randf(-Math.PI*2, Math.PI*2)
// meshObj.hover = hover
return meshObj
})