diff --git a/gradle.properties b/gradle.properties
index 3284fcf..cb779bc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,7 +9,7 @@ group=com.soywiz.korlibs.korma
 version=2.0.0-SNAPSHOT
 
 # korlibs
-kdsVersion=2.2.0
+kdsVersion=2.2.1
 
 # bintray location
 project.bintray.org=korlibs
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index e708b1c..7454180 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 69a9715..05679dc 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 4f906e0..744e882 100755
--- a/gradlew
+++ b/gradlew
@@ -72,7 +72,7 @@ case "`uname`" in
   Darwin* )
     darwin=true
     ;;
-  MINGW* )
+  MSYS* | MINGW* )
     msys=true
     ;;
   NONSTOP* )
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/geom/Matrix.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/geom/Matrix.kt
index 47ac493..9978e43 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/geom/Matrix.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/geom/Matrix.kt
@@ -25,6 +25,9 @@ data class Matrix(
             Matrix(a.toDouble(), b.toDouble(), c.toDouble(), d.toDouble(), tx.toDouble(), ty.toDouble())
 
         operator fun invoke(m: Matrix, out: Matrix = Matrix()): Matrix = out.copyFrom(m)
+
+        fun transformXf(a: Float, b: Float, c: Float, d: Float, tx: Float, ty: Float, px: Float, py: Float): Float = a * px + c * py + tx
+        fun transformYf(a: Float, b: Float, c: Float, d: Float, tx: Float, ty: Float, px: Float, py: Float): Float = d * py + b * px + ty
     }
 
     var af: Float
@@ -73,13 +76,15 @@ data class Matrix(
         }
     }
 
-    fun setTo(a: Double, b: Double, c: Double, d: Double, tx: Double, ty: Double): Matrix = this.apply {
+    fun setTo(a: Double, b: Double, c: Double, d: Double, tx: Double, ty: Double): Matrix {
         this.a = a
         this.b = b
         this.c = c
         this.d = d
         this.tx = tx
         this.ty = ty
+        return this
+
     }
     fun setTo(a: Float, b: Float, c: Float, d: Float, tx: Float, ty: Float): Matrix = setTo(a.toDouble(), b.toDouble(), c.toDouble(), d.toDouble(), tx.toDouble(), ty.toDouble())
     fun setTo(a: Int, b: Int, c: Int, d: Int, tx: Int, ty: Int): Matrix = setTo(a.toDouble(), b.toDouble(), c.toDouble(), d.toDouble(), tx.toDouble(), ty.toDouble())
@@ -191,6 +196,7 @@ data class Matrix(
     fun deltaTransformY(x: Double, y: Double): Double = (x * b) + (y * d)
 
     fun identity() = setTo(1.0, 0.0, 0.0, 1.0, 0.0, 0.0)
+    fun setToNan() = setTo(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN)
 
     fun isIdentity() = getType() == Type.IDENTITY
 
@@ -332,8 +338,6 @@ data class Matrix(
         rectangle.height = ceil((if (y1 > y3) y1 else y3) - rectangle.y)
     }
 
-
-
     fun copyFromArray(value: FloatArray, offset: Int = 0): Matrix = setTo(
         value[offset + 0], value[offset + 1], value[offset + 2],
         value[offset + 3], value[offset + 4], value[offset + 5]
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/geom/triangle/Triangle.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/geom/triangle/Triangle.kt
index 1884869..564ba60 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/geom/triangle/Triangle.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/geom/triangle/Triangle.kt
@@ -207,7 +207,7 @@ fun Triangle.edgeIndex(p1: IPoint, p2: IPoint): Int {
     return -1
 }
 
-class TriangleList(val points: PointArrayList, val indices: IntArray, val numTriangles: Int = indices.size / 3) : Iterable<Triangle> {
+class TriangleList(val points: PointArrayList, val indices: ShortArray, val numTriangles: Int = indices.size / 3) : Iterable<Triangle> {
     val numIndices get() = numTriangles * 3
     val pointCount get() = points.size
 
@@ -224,9 +224,9 @@ class TriangleList(val points: PointArrayList, val indices: IntArray, val numTri
     }
 
     fun getTriangle(index: Int, out: MutableTriangle = MutableTriangle()): MutableTriangle {
-        points.getPoint(indices[index * 3 + 0], out.p0)
-        points.getPoint(indices[index * 3 + 1], out.p1)
-        points.getPoint(indices[index * 3 + 2], out.p2)
+        points.getPoint(indices[index * 3 + 0].toInt() and 0xFFFF, out.p0)
+        points.getPoint(indices[index * 3 + 1].toInt() and 0xFFFF, out.p1)
+        points.getPoint(indices[index * 3 + 2].toInt() and 0xFFFF, out.p2)
         return out
     }
 
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/interpolation/Interpolation.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/interpolation/Interpolation.kt
index c69b3b5..8ad58db 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/interpolation/Interpolation.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/interpolation/Interpolation.kt
@@ -1,5 +1,7 @@
 package com.soywiz.korma.interpolation
 
+import com.soywiz.kds.*
+
 interface Interpolable<T> {
     fun interpolateWith(ratio: Double, other: T): T
 }
@@ -12,5 +14,5 @@ fun Double.interpolate(l: Float, r: Float): Float = (l + (r - l) * this).toFloat
 fun Double.interpolate(l: Double, r: Double): Double = (l + (r - l) * this)
 fun Double.interpolate(l: Int, r: Int): Int = (l + (r - l) * this).toInt()
 fun Double.interpolate(l: Long, r: Long): Long = (l + (r - l) * this).toLong()
-fun <T> Double.interpolate(l: Interpolable<T>, r: Interpolable<T>): T = l.interpolateWith(this, r as T)
+fun <T> Double.interpolate(l: Interpolable<T>, r: Interpolable<T>): T = l.interpolateWith(this, r.fastCastTo<T>())
 fun <T : Interpolable<T>> Double.interpolate(l: T, r: T): T = l.interpolateWith(this, r)
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/math/Math.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/math/Math.kt
index 6179b17..131f6c7 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/math/Math.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/math/Math.kt
@@ -64,3 +64,19 @@ fun Long.prevMultipleOf(multiple: Long) = if (this.isMultipleOf(multiple)) this
 
 fun Int.isMultipleOf(multiple: Int) = multiple == 0 || (this % multiple) == 0
 fun Long.isMultipleOf(multiple: Long) = multiple == 0L || (this % multiple) == 0L
+
+fun min(a: Int, b: Int, c: Int) = min(min(a, b), c)
+fun min(a: Float, b: Float, c: Float) = min(min(a, b), c)
+fun min(a: Double, b: Double, c: Double) = min(min(a, b), c)
+
+fun min(a: Int, b: Int, c: Int, d: Int) = min(min(min(a, b), c), d)
+fun min(a: Float, b: Float, c: Float, d: Float) = min(min(min(a, b), c), d)
+fun min(a: Double, b: Double, c: Double, d: Double) = min(min(min(a, b), c), d)
+
+fun max(a: Int, b: Int, c: Int) = max(max(a, b), c)
+fun max(a: Float, b: Float, c: Float) = max(max(a, b), c)
+fun max(a: Double, b: Double, c: Double) = max(max(a, b), c)
+
+fun max(a: Int, b: Int, c: Int, d: Int) = max(max(max(a, b), c), d)
+fun max(a: Float, b: Float, c: Float, d: Float) = max(max(max(a, b), c), d)
+fun max(a: Double, b: Double, c: Double, d: Double) = max(max(max(a, b), c), d)
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/EarCutTriangulator.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/EarCutTriangulator.kt
index 07a0f83..e889f6d 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/EarCutTriangulator.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/EarCutTriangulator.kt
@@ -15,7 +15,7 @@ object EarCutTriangulator {
             floats[n * 2 + 1] = points.getY(n).toFloat()
         }
         val result = EarCut.earcut(floats, holeIndices, 2)
-        return TriangleList(points, result.toIntArray())
+        return TriangleList(points, result.toShortArray())
     }
 }
 
diff --git a/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/poly2tri/TriangulateExt.kt b/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/poly2tri/TriangulateExt.kt
index 8108075..1e6ee8e 100644
--- a/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/poly2tri/TriangulateExt.kt
+++ b/korma/src/commonMain/kotlin/com/soywiz/korma/triangle/poly2tri/TriangulateExt.kt
@@ -32,5 +32,5 @@ fun VectorPath.triangulateSafe(doClipper: Boolean = true): TriangleList {
         points.add(it.p1.x, it.p1.y)
         points.add(it.p2.x, it.p2.y)
     }
-    return TriangleList(points, indices.toIntArray())
+    return TriangleList(points, indices.toShortArray())
 }
diff --git a/korma/src/commonTest/kotlin/com/soywiz/korma/math/MathTest.kt b/korma/src/commonTest/kotlin/com/soywiz/korma/math/MathTest.kt
index caeb697..4ee2b6d 100644
--- a/korma/src/commonTest/kotlin/com/soywiz/korma/math/MathTest.kt
+++ b/korma/src/commonTest/kotlin/com/soywiz/korma/math/MathTest.kt
@@ -1,9 +1,24 @@
 package com.soywiz.korma.math
 
+import com.soywiz.kds.rotated
 import kotlin.math.E
 import kotlin.test.*
 
 class MathTest {
+    @Test
+    fun testMinMax34() {
+        for (n in 0 until 4) {
+            val list = listOf(1, 2, 3, 4).rotated(n)
+            assertEquals(1, min(list[0], list[1], list[2], list[3]))
+            assertEquals(4, max(list[0], list[1], list[2], list[3]))
+        }
+        for (n in 0 until 3) {
+            val list = listOf(1, 2, 3).rotated(n)
+            assertEquals(1, min(list[0], list[1], list[2]))
+            assertEquals(3, max(list[0], list[1], list[2]))
+        }
+    }
+
     @Test
     fun testConvertRange() {
         assertEquals(300.0, 100.0.convertRange(50.0, 150.0, 200.0, 400.0))