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project mouse into view when clicking w/ mouse unlocked

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a dinosaur
2024-08-28 02:28:24 +10:00
parent 160c9c8a68
commit 503c48404c
12 changed files with 278 additions and 111 deletions
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13
Sources/Voxelotl/Math/Matrix4x4.swift
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@ -88,6 +88,19 @@ public extension simd_float4x4 {
.init(0, 0, z, -1),
.init(0, 0, w, 0))
}
func project(_ v: SIMD3<Float>) -> SIMD3<Float> {
let t = self.transpose, v = SIMD4(v, 1)
return .init(simd_dot(v, t.columns.0), simd_dot(v, t.columns.1), simd_dot(v, t.columns.2))
* (1 / simd_dot(v, t.columns.3))
}
static func * (lhs: Self, rhs: SIMD3<Float>) -> SIMD3<Float> {
.init(
simd_dot(lhs.columns.0.xyz, rhs),
simd_dot(lhs.columns.1.xyz, rhs),
simd_dot(lhs.columns.2.xyz, rhs))
}
}
extension simd_quatf {