// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test

// NOTE: Clang used to miscompile GLKit functions on i386. rdar://problem/19184403

// On i386, it seems to work optimized mode, but fails in non-optimized.
// rdar://problem/26392402
// UNSUPPORTED: CPU=i386
// REQUIRES: objc_interop

// GLKit is not available on watchOS.
// UNSUPPORTED: OS=watchos

import GLKit

func printV4(_ v: GLKVector4) {
  print("<\(v.x) \(v.y) \(v.z) \(v.w)>")
}

let x = GLKVector4Make(1, 0, 0, 0)
let y = GLKVector4Make(0, 1, 0, 0)
let z = GLKVector4Make(0, 0, 1, 0)

printV4(x) // CHECK:      <1.0 0.0 0.0 0.0>
printV4(y) // CHECK-NEXT: <0.0 1.0 0.0 0.0>
printV4(z) // CHECK-NEXT: <0.0 0.0 1.0 0.0>

print(GLKVector4DotProduct(x, y)) // CHECK-NEXT: 0.0

let z2 = GLKVector4CrossProduct(x, y)
print(GLKVector4AllEqualToVector4(z, z2)) // CHECK-NEXT: true

infix operator • : MultiplicationPrecedence
infix operator ⨉ : MultiplicationPrecedence
func •(x: GLKVector4, y: GLKVector4) -> Float {
  return GLKVector4DotProduct(x, y)
}
func ⨉(x: GLKVector4, y: GLKVector4) -> GLKVector4 {
  return GLKVector4CrossProduct(x, y)
}
func ==(x: GLKVector4, y: GLKVector4) -> Bool {
  return GLKVector4AllEqualToVector4(x, y)
}

print(x • y) // CHECK-NEXT: 0.0
print(x ⨉ y == z) // CHECK-NEXT: true

func printM4(_ m: GLKMatrix4) {
  print("⎡\(m.m00) \(m.m01) \(m.m02) \(m.m03)⎤")
  print("⎢\(m.m10) \(m.m11) \(m.m12) \(m.m13)⎥")
  print("⎢\(m.m20) \(m.m21) \(m.m22) \(m.m23)⎥")
  print("⎣\(m.m30) \(m.m31) \(m.m32) \(m.m33)⎦")
}

let flipXY = GLKMatrix4Make(0, 1, 0, 0,
                            1, 0, 0, 0,
                            0, 0, 1, 0,
                            0, 0, 0, 1)
// CHECK-NEXT: ⎡0.0 1.0 0.0 0.0⎤
// CHECK-NEXT: ⎢1.0 0.0 0.0 0.0⎥
// CHECK-NEXT: ⎢0.0 0.0 1.0 0.0⎥
// CHECK-NEXT: ⎣0.0 0.0 0.0 1.0⎦
printM4(flipXY)
// FIXME: GLKMatrix4MakeWithArray takes mutable pointer arguments for no
// good reason. rdar://problem/19124355
var flipYZElements: [Float] = [1, 0, 0, 0,
                               0, 0, 1, 0,
                               0, 1, 0, 0,
                               0, 0, 0, 1]
let flipYZ = GLKMatrix4MakeWithArray(&flipYZElements)
// CHECK-NEXT: ⎡1.0 0.0 0.0 0.0⎤
// CHECK-NEXT: ⎢0.0 0.0 1.0 0.0⎥
// CHECK-NEXT: ⎢0.0 1.0 0.0 0.0⎥
// CHECK-NEXT: ⎣0.0 0.0 0.0 1.0⎦
printM4(flipYZ)

let rotateXYZ = GLKMatrix4Multiply(flipYZ, flipXY)
// CHECK-NEXT: ⎡0.0 0.0 1.0 0.0⎤
// CHECK-NEXT: ⎢1.0 0.0 0.0 0.0⎥
// CHECK-NEXT: ⎢0.0 1.0 0.0 0.0⎥
// CHECK-NEXT: ⎣0.0 0.0 0.0 1.0⎦
printM4(rotateXYZ)

let y3 = GLKMatrix4MultiplyVector4(flipXY, x)
print(y == y3) // CHECK-NEXT: true

let y4 = GLKMatrix4MultiplyVector4(flipYZ, z)
print(y == y4) // CHECK-NEXT: true

let z3 = GLKMatrix4MultiplyVector4(rotateXYZ, x)
print(z == z3) // CHECK-NEXT: true

func •(x: GLKMatrix4, y: GLKMatrix4) -> GLKMatrix4 {
  return GLKMatrix4Multiply(x, y)
}
func •(x: GLKMatrix4, y: GLKVector4) -> GLKVector4 {
  return GLKMatrix4MultiplyVector4(x, y)
}

print(y == flipXY • x) // CHECK-NEXT: true
print(x == flipXY • y) // CHECK-NEXT: true
print(z == flipXY • z) // CHECK-NEXT: true
print(x == flipYZ • x) // CHECK-NEXT: true
print(z == flipYZ • y) // CHECK-NEXT: true
print(y == flipYZ • z) // CHECK-NEXT: true
print(z == rotateXYZ • x) // CHECK-NEXT: true
print(x == rotateXYZ • y) // CHECK-NEXT: true
print(y == rotateXYZ • z) // CHECK-NEXT: true
print(z == flipYZ • flipXY • x) // CHECK-NEXT: true
print(x == flipYZ • flipXY • y) // CHECK-NEXT: true
print(y == flipYZ • flipXY • z) // CHECK-NEXT: true

let xxx = GLKVector3Make(1, 0, 0)
let yyy = GLKVector3Make(0, 1, 0)
let zzz = GLKVector3Make(0, 0, 1)

print(GLKVector3DotProduct(xxx, yyy)) // CHECK-NEXT: 0.0
print(GLKVector3AllEqualToVector3(GLKVector3CrossProduct(xxx, yyy), zzz)) // CHECK-NEXT: true

let xx = GLKVector2Make(1, 0)
let yy = GLKVector2Make(0, 1)
print(GLKVector2DotProduct(xx, yy)) // CHECK-NEXT: 0.0