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prep for chunk meshing

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a dinosaur
2024-09-01 21:16:05 +10:00
parent cb0e7bb232
commit da26773221
11 changed files with 157 additions and 91 deletions
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32
Sources/Voxelotl/Math/AABB.swift
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@ -1,45 +1,45 @@
import simd
struct AABB {
public struct AABB {
private var _bounds: simd_float2x3
var lower: SIMD3<Float> {
public var lower: SIMD3<Float> {
get { _bounds[0] }
set(row) { self._bounds[0] = row }
}
var upper: SIMD3<Float> {
public var upper: SIMD3<Float> {
get { _bounds[1] }
set(row) { self._bounds[1] = row }
}
var center: SIMD3<Float> {
public var center: SIMD3<Float> {
get { (self._bounds[0] + self._bounds[1]) / 2 }
}
var size: SIMD3<Float> {
public var size: SIMD3<Float> {
get { self._bounds[1] - self._bounds[0] }
}
var left: Float { self._bounds[0].x }
var bottom: Float { self._bounds[0].y }
var far: Float { self._bounds[0].z }
var right: Float { self._bounds[1].x }
var top: Float { self._bounds[1].y }
var near: Float { self._bounds[1].z }
public var left: Float { self._bounds[0].x }
public var bottom: Float { self._bounds[0].y }
public var far: Float { self._bounds[0].z }
public var right: Float { self._bounds[1].x }
public var top: Float { self._bounds[1].y }
public var near: Float { self._bounds[1].z }
private init(bounds: simd_float2x3) {
self._bounds = bounds
}
init(from: SIMD3<Float>, to: SIMD3<Float>) {
public init(from: SIMD3<Float>, to: SIMD3<Float>) {
self.init(bounds: .init(from, to))
}
static func fromUnitCube(position: SIMD3<Float> = .zero, scale: SIMD3<Float> = .one) -> Self {
public static func fromUnitCube(position: SIMD3<Float> = .zero, scale: SIMD3<Float> = .one) -> Self {
self.init(
from: position - scale,
to: position + scale)
}
func touching(_ other: Self) -> Bool{
public func touching(_ other: Self) -> Bool{
let distLower = other._bounds[0] - self._bounds[1] // x: left, y: bottom, z: far
let distUpper = self._bounds[0] - other._bounds[1] // x: right, y: top, z: near
@ -51,8 +51,8 @@ struct AABB {
}
}
extension AABB {
static func + (lhs: Self, rhs: SIMD3<Float>) -> Self {
public extension AABB {
public static func + (lhs: Self, rhs: SIMD3<Float>) -> Self {
.init(bounds: lhs._bounds + .init(rhs, rhs))
}
}

19
Sources/Voxelotl/Math/VectorExtensions.swift
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@ -22,11 +22,13 @@ public extension SIMD3 {
}
}
public extension SIMD3 where Scalar: FloatingPoint {
@inline(__always) static var X: Self { Self(1, 0, 0) }
@inline(__always) static var Y: Self { Self(0, 1, 0) }
@inline(__always) static var Z: Self { Self(0, 0, 1) }
public extension SIMD3 where Scalar: Numeric {
@inline(__always) static var X: Self { Self(1, 0, 0) }
@inline(__always) static var Y: Self { Self(0, 1, 0) }
@inline(__always) static var Z: Self { Self(0, 0, 1) }
}
public extension SIMD3 where Scalar: FloatingPoint {
@inline(__always) static var up: Self { Y }
@inline(__always) static var down: Self { -Y }
@inline(__always) static var left: Self { -X }
@ -35,6 +37,15 @@ public extension SIMD3 where Scalar: FloatingPoint {
@inline(__always) static var back: Self { Z }
}
public extension SIMD3 where Scalar: SignedInteger & FixedWidthInteger {
@inline(__always) static var up: Self { Y }
@inline(__always) static var down: Self { 0 &- Y }
@inline(__always) static var left: Self { 0 &- X }
@inline(__always) static var right: Self { X }
@inline(__always) static var forward: Self { 0 &- Z }
@inline(__always) static var back: Self { Z }
}
public extension SIMD3 where Scalar: Numeric & AdditiveArithmetic {
@inline(__always) func dot(_ b: Self) -> Scalar { self.x * b.x + self.y * b.y + self.z * b.z }
}