STEINNI
34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
export class Frustum {
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constructor(planes) {
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if(!Frustum.#validatePlanes(planes)) throw(new Error('Invalid frustum planes'))
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this.planes = planes.map(p => ({ ...p }))
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}
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static #validatePlanes(planes) {
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if(!Array.isArray(planes) || planes.length !== 6) return(false)
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for(const p of planes) {
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if(!p || typeof(p) !== 'object') return(false)
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if(typeof(p.nx) !== 'number' || Number.isNaN(p.nx)) return(false)
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if(typeof(p.ny) !== 'number' || Number.isNaN(p.ny)) return(false)
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if(typeof(p.nz) !== 'number' || Number.isNaN(p.nz)) return(false)
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if(typeof(p.d) !== 'number' || Number.isNaN(p.d)) return(false)
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}
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return(true)
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}
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static fromPlanes(planes) {
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if(!Frustum.#validatePlanes(planes)) return(null)
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return(new Frustum(planes))
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}
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containsPoint(position) {
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for(const p of this.planes) {
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const dist = p.nx * position.x + p.ny * position.y + p.nz * position.z + p.d
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if(dist < 0) return(false)
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}
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return(true)
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}
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}
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