62 lines
1.6 KiB
Swift
62 lines
1.6 KiB
Swift
//
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// Memory.swift
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// Metaballs
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//
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// Created by Eryn Wells on 8/6/17.
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// Copyright © 2017 Eryn Wells. All rights reserved.
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//
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import Cocoa
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import Foundation
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extension UnsafeMutableRawPointer {
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func writeAndAdvance<T>(value: inout T) -> UnsafeMutableRawPointer {
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let stride = MemoryLayout.stride(ofValue: value)
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copyMemory(from: &value, byteCount: stride)
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return advanced(by: stride)
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}
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}
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/// Metal's float4 type. 4 bytes per float, 16 bytes total, 16 byte aligned.
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public struct Float4 {
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public var x: Float = 0
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public var y: Float = 0
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public var z: Float = 0
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public var w: Float = 0
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public init() { }
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public init(_ x: Float, _ y: Float, _ z: Float, _ w: Float) {
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self.x = x
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self.y = y
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self.z = z
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self.w = w
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}
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public init(r: Float, g: Float, b: Float, a: Float) {
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x = r
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y = g
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z = b
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w = a
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}
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init(color: NSColor) {
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if let convertedColor = color.usingColorSpace(NSColorSpace.deviceRGB) {
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self.init(Float(convertedColor.redComponent), Float(convertedColor.greenComponent), Float(convertedColor.blueComponent), Float(convertedColor.alphaComponent))
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} else {
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self.init()
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}
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}
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}
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extension NSColor {
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convenience init(float4: Float4) {
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self.init(deviceRed: CGFloat(float4.x), green: CGFloat(float4.y), blue: CGFloat(float4.z), alpha: CGFloat(float4.w))
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}
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}
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extension Array where Element == Float {
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init(float4: Float4) {
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self.init(arrayLiteral: float4.x, float4.y, float4.z, float4.w)
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}
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}
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