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import { Vector3, Geometry } from 'three'
import { FACE_SCALE, LINE_THICKNESS } from '../constants'
export function getLineGeometry(points) {
return [
points.slice(0, 17),
points.slice(17, 22),
points.slice(22, 27),
points.slice(27, 31),
points.slice(31, 36),
points.slice(36, 42),
points.slice(42, 48),
points.slice(48)
].map((a, i) => {
const geometry = new Geometry()
a.forEach(p => geometry.vertices.push(p))
if (i > 4) {
geometry.vertices.push(a[0])
}
return geometry
})
}
export function updateLineGeometry(points, meshes) {
getLineGeometry(points).forEach((geometry, i) => {
const [line, mesh] = meshes[i]
line.setGeometry(geometry, () => LINE_THICKNESS)
mesh.geometry.vertices = line.geometry.vertices
mesh.geometry.verticesNeedUpdate = true
})
}
export function lerp(n, a, b) {
return (b - a) * n + a
}
export function lerpPoint(n, A, B, C) {
C.x = lerp(n, A.x, B.x)
C.y = lerp(n, A.y, B.y)
C.z = lerp(n, A.z, B.z)
}
export function lerpPoints(n, A, B, C) {
for (let i = 0, len = A.length; i < len; i++) {
lerpPoint(n, A[i], B[i], C[i])
}
}
export function updateCubeGeometry(points, cubes) {
cubes.forEach((cube, i) => {
const p = points[i]
cube.position.set(p.x, p.y, p.z)
})
}
export function updateFace(buf, cubes, meshes) {
updateCubeGeometry(buf, cubes)
updateLineGeometry(buf, meshes)
}
export function getBounds(obj) {
return obj.reduce((a, p) => {
return [
Math.min(a[0], p[0]),
Math.max(a[1], p[0]),
Math.min(a[2], p[1]),
Math.max(a[3], p[1]),
Math.min(a[4], p[2]),
Math.max(a[5], p[2]),
]
}, [Infinity, -Infinity, Infinity, -Infinity, Infinity, -Infinity])
}
export function recenter(obj) {
const bounds = getBounds(obj)
const xWidth = (bounds[1] - bounds[0]) / 2
const yWidth = (bounds[3] - bounds[2]) / -3
const zWidth = (bounds[5] - bounds[4]) / 2
return obj.map(p => {
p[0] = p[0] - bounds[0] - xWidth
p[1] = -p[1] + bounds[1] + yWidth
p[2] = p[2] - bounds[2] + zWidth
return new Vector3(p[0] * FACE_SCALE, p[1] * FACE_SCALE, p[2] * FACE_SCALE)
})
}
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