Update Kotlin, Gradle and clean up files

build.gradle

@@ -1,16 +1,17 @@
 plugins {
-    id "org.jetbrains.kotlin.jvm" version "1.2.10"
+    id "org.jetbrains.kotlin.jvm" version "1.5.21"
 }
 
 apply plugin: 'idea'
 apply plugin: 'kotlin'
 
 repositories {
-    jcenter()
+    mavenCentral()
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.5.21"
+
     testImplementation "org.jetbrains.kotlin:kotlin-test-junit"
     testImplementation 'junit:junit:4.12'
 }

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-all.zip

src/main/kotlin/com/curiouscreature/kotlin/math/Matrix.kt

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+@file:Suppress("unused")
+
 package com.curiouscreature.kotlin.math
 
 import kotlin.math.*
@@ -355,6 +357,8 @@ fun transpose(m: Mat3) = Mat3(
         Float3(m.x.y, m.y.y, m.z.y),
         Float3(m.x.z, m.y.z, m.z.z)
 )
+
+@Suppress("LocalVariableName")
 fun inverse(m: Mat3): Mat3 {
     val a = m.x.x
     val b = m.x.y
@@ -385,6 +389,7 @@ fun transpose(m: Mat4) = Mat4(
         Float4(m.x.z, m.y.z, m.z.z, m.w.z),
         Float4(m.x.w, m.y.w, m.z.w, m.w.w)
 )
+
 fun inverse(m: Mat4): Mat4 {
     val result = Mat4()
 
@@ -462,8 +467,8 @@ fun translation(m: Mat4) = translation(m.translation)
 fun rotation(m: Mat4) = Mat4(normalize(m.right), normalize(m.up), normalize(m.forward))
 fun rotation(d: Float3): Mat4 {
     val r = transform(d, ::radians)
-    val c = transform(r, { x -> cos(x) })
-    val s = transform(r, { x -> sin(x) })
+    val c = transform(r) { x -> cos(x) }
+    val s = transform(r) { x -> sin(x) }
 
     return Mat4.of(
              c.y * c.z, -c.x * s.z + s.x * s.y * c.z,  s.x * s.z + c.x * s.y * c.z, 0.0f,

src/main/kotlin/com/curiouscreature/kotlin/math/Ray.kt

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+@file:Suppress("unused")
+
 package com.curiouscreature.kotlin.math
 
 data class Ray(var origin: Float3 = Float3(), var direction: Float3)

src/main/kotlin/com/curiouscreature/kotlin/math/Scalar.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-@file:Suppress("NOTHING_TO_INLINE")
+@file:Suppress("NOTHING_TO_INLINE", "unused")
 
 package com.curiouscreature.kotlin.math
 

src/main/kotlin/com/curiouscreature/kotlin/math/Vector.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-@file:Suppress("NOTHING_TO_INLINE")
+@file:Suppress("NOTHING_TO_INLINE", "unused")
 
 package com.curiouscreature.kotlin.math
 
@@ -284,10 +284,7 @@ data class Float3(var x: Float = 0.0f, var y: Float = 0.0f, var z: Float = 0.0f)
     }
 
     operator fun set(
-            index1: VectorComponent,
-            index2: VectorComponent,
-            index3: VectorComponent,
-            v: Float) {
+            index1: VectorComponent, index2: VectorComponent, index3: VectorComponent, v: Float) {
         set(index1, v)
         set(index2, v)
         set(index3, v)
@@ -529,14 +526,15 @@ data class Float4(
         set(index2, v)
     }
 
-    operator fun set(index1: VectorComponent, index2: VectorComponent, index3: VectorComponent,
-            v: Float) {
+    operator fun set(
+            index1: VectorComponent, index2: VectorComponent, index3: VectorComponent, v: Float) {
         set(index1, v)
         set(index2, v)
         set(index3, v)
     }
 
-    operator fun set(index1: VectorComponent, index2: VectorComponent,
+    operator fun set(
+            index1: VectorComponent, index2: VectorComponent,
             index3: VectorComponent, index4: VectorComponent, v: Float) {
         set(index1, v)
         set(index2, v)
@@ -615,25 +613,29 @@ fun refract(i: Float2, n: Float2, eta: Float): Float2 {
 inline fun clamp(v: Float2, min: Float, max: Float): Float2 {
     return Float2(
             clamp(v.x, min, max),
-            clamp(v.y, min, max))
+            clamp(v.y, min, max)
+    )
 }
 
 inline fun clamp(v: Float2, min: Float2, max: Float2): Float2 {
     return Float2(
             clamp(v.x, min.x, max.x),
-            clamp(v.y, min.y, max.y))
+            clamp(v.y, min.y, max.y)
+    )
 }
 
 inline fun mix(a: Float2, b: Float2, x: Float): Float2 {
     return Float2(
             mix(a.x, b.x, x),
-            mix(a.y, b.y, x))
+            mix(a.y, b.y, x)
+    )
 }
 
 inline fun mix(a: Float2, b: Float2, x: Float2): Float2 {
     return Float2(
             mix(a.x, b.x, x.x),
-            mix(a.y, b.y, x.y))
+            mix(a.y, b.y, x.y)
+    )
 }
 
 inline fun min(v: Float2) = min(v.x, v.y)
@@ -704,28 +706,32 @@ inline fun clamp(v: Float3, min: Float, max: Float): Float3 {
     return Float3(
             clamp(v.x, min, max),
             clamp(v.y, min, max),
-            clamp(v.z, min, max))
+            clamp(v.z, min, max)
+    )
 }
 
 inline fun clamp(v: Float3, min: Float3, max: Float3): Float3 {
     return Float3(
             clamp(v.x, min.x, max.x),
             clamp(v.y, min.y, max.y),
-            clamp(v.z, min.z, max.z))
+            clamp(v.z, min.z, max.z)
+    )
 }
 
 inline fun mix(a: Float3, b: Float3, x: Float): Float3 {
     return Float3(
             mix(a.x, b.x, x),
             mix(a.y, b.y, x),
-            mix(a.z, b.z, x))
+            mix(a.z, b.z, x)
+    )
 }
 
 inline fun mix(a: Float3, b: Float3, x: Float3): Float3 {
     return Float3(
             mix(a.x, b.x, x.x),
             mix(a.y, b.y, x.y),
-            mix(a.z, b.z, x.z))
+            mix(a.z, b.z, x.z)
+    )
 }
 
 inline fun min(v: Float3) = min(v.x, min(v.y, v.z))
@@ -784,23 +790,26 @@ inline fun clamp(v: Float4, min: Float, max: Float): Float4 {
             clamp(v.x, min, max),
             clamp(v.y, min, max),
             clamp(v.z, min, max),
-            clamp(v.w, min, max))
+            clamp(v.w, min, max)
+    )
 }
 
 inline fun clamp(v: Float4, min: Float4, max: Float4): Float4 {
     return Float4(
             clamp(v.x, min.x, max.x),
             clamp(v.y, min.y, max.y),
             clamp(v.z, min.z, max.z),
-            clamp(v.w, min.z, max.w))
+            clamp(v.w, min.z, max.w)
+    )
 }
 
 inline fun mix(a: Float4, b: Float4, x: Float): Float4 {
     return Float4(
             mix(a.x, b.x, x),
             mix(a.y, b.y, x),
             mix(a.z, b.z, x),
-            mix(a.w, b.w, x))
+            mix(a.w, b.w, x)
+    )
 }
 
 inline fun mix(a: Float4, b: Float4, x: Float4): Float4 {
@@ -1075,10 +1084,7 @@ data class Bool3(var x: Boolean = false, var y: Boolean = false, var z: Boolean
     }
 
     operator fun set(
-            index1: VectorComponent,
-            index2: VectorComponent,
-            index3: VectorComponent,
-            v: Boolean) {
+            index1: VectorComponent, index2: VectorComponent, index3: VectorComponent, v: Boolean) {
         set(index1, v)
         set(index2, v)
         set(index3, v)
@@ -1282,14 +1288,15 @@ data class Bool4(
         set(index2, v)
     }
 
-    operator fun set(index1: VectorComponent, index2: VectorComponent, index3: VectorComponent,
-            v: Boolean) {
+    operator fun set(
+            index1: VectorComponent, index2: VectorComponent, index3: VectorComponent, v: Boolean) {
         set(index1, v)
         set(index2, v)
         set(index3, v)
     }
 
-    operator fun set(index1: VectorComponent, index2: VectorComponent,
+    operator fun set(
+            index1: VectorComponent, index2: VectorComponent,
             index3: VectorComponent, index4: VectorComponent, v: Boolean) {
         set(index1, v)
         set(index2, v)