codelynx · November 17, 2021 18:56 · Nov 6, 2015 · Nov 6, 2015
diff --git a/simd+ext.swift b/simd+ext.swift
@@ -0,0 +1,55 @@
+//
+//  simd+ext.swift
+//
+//  Created by Kaz Yoshikawa on 11/6/15.
+//
+//
+
+import Foundation
+import simd
+import GLKit
+
+extension float4x4 {
+
+	static func makeScale(x: Float, _ y: Float, _ z: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeScale(x, y, z), float4x4.self)
+	}
+
+	static func makeRotate(radians: Float, _ x: Float, _ y: Float, _ z: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeRotation(radians, x, y, z), float4x4.self)
+	}
+
+	static func makeTranslation(x: Float, _ y: Float, _ z: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeTranslation(x, y, z), float4x4.self)
+	}
+
+	static func makePerspective(fovyRadians: Float, _ aspect: Float, _ nearZ: Float, _ farZ: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakePerspective(fovyRadians, aspect, nearZ, farZ), float4x4.self)
+	}
+
+	static func makeFrustum(left: Float, _ right: Float, _ bottom: Float, _ top: Float, _ nearZ: Float, _ farZ: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeFrustum(left, right, bottom, top, nearZ, farZ), float4x4.self)
+	}
+
+	static func makeOrtho(left: Float, _ right: Float, _ bottom: Float, _ top: Float, _ nearZ: Float, _ farZ: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeOrtho(left, right, bottom, top, nearZ, farZ), float4x4.self)
+	}
+
+	static func makeLookAt(eyeX: Float, _ eyeY: Float, _ eyeZ: Float, _ centerX: Float, _ centerY: Float, _ centerZ: Float, _ upX: Float, _ upY: Float, _ upZ: Float) -> float4x4 {
+		return unsafeBitCast(GLKMatrix4MakeLookAt(eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ), float4x4.self)
+	}
+
+
+	func scale(x: Float, y: Float, z: Float) -> float4x4 {
+		return self * float4x4.makeScale(x, y, z)
+	}
+
+	func rotate(radians: Float, _ x: Float, _ y: Float, _ z: Float) -> float4x4 {
+		return self * float4x4.makeRotate(radians, x, y, z)
+	}
+
+	func translate(x: Float, _ y: Float, _ z: Float) -> float4x4 {
+		return self * float4x4.makeTranslation(x, y, z)
+	}
+
+}