diff --git a/arts/flowforce/src/main/kotlin/dev/oblac/gart/flowforce/eclipse/Eclipse.kt b/arts/flowforce/src/main/kotlin/dev/oblac/gart/flowforce/eclipse/Eclipse.kt
index 34da753..edfb2fc 100644
--- a/arts/flowforce/src/main/kotlin/dev/oblac/gart/flowforce/eclipse/Eclipse.kt
+++ b/arts/flowforce/src/main/kotlin/dev/oblac/gart/flowforce/eclipse/Eclipse.kt
@@ -2,6 +2,7 @@ package dev.oblac.gart.flowforce.eclipse
 
 import dev.oblac.gart.Dimension
 import dev.oblac.gart.Gart
+import dev.oblac.gart.angles.Radians
 import dev.oblac.gart.color.BgColors
 import dev.oblac.gart.color.Colors
 import dev.oblac.gart.force.Flow
@@ -76,7 +77,7 @@ fun drawRays(c: Canvas, d: Dimension, moonR: Float) {
         val dx = x - d.cx
         val dy = y - d.cy
         val theta = atan2(dy, dx) + PIf / 2f + rndf(-0.3f, 0.3f)
-        Flow(theta, 2f)
+        Flow(Radians(theta), 2f)
     }
     val ff = ForceField.of(gart.d) { x, y -> flow(x, y) }
 
diff --git a/gart/src/main/kotlin/dev/oblac/gart/force/Flow.kt b/gart/src/main/kotlin/dev/oblac/gart/force/Flow.kt
index 6c72540..3944c36 100644
--- a/gart/src/main/kotlin/dev/oblac/gart/force/Flow.kt
+++ b/gart/src/main/kotlin/dev/oblac/gart/force/Flow.kt
@@ -1,10 +1,11 @@
 package dev.oblac.gart.force
 
+import dev.oblac.gart.angles.Radians
+import dev.oblac.gart.angles.cos
+import dev.oblac.gart.angles.middleAngle
+import dev.oblac.gart.angles.sin
 import dev.oblac.gart.math.Vector2
-import dev.oblac.gart.math.middleAngle
 import org.jetbrains.skia.Point
-import kotlin.math.cos
-import kotlin.math.sin
 
 /**
  * Flow is a vector that represents the direction and magnitude of a flow.
@@ -13,7 +14,7 @@ import kotlin.math.sin
  * @param direction in radians, indicates the direction of the flow. The angle is measured from the negative x-axis.
  * 0 is up, PI/2 is right, PI is down, 3PI/2 is left.
  */
-data class Flow(val direction: Float, val magnitude: Float = 1f) : Force {
+data class Flow(val direction: Radians, val magnitude: Float = 1f) : Force {
 
     // todo remove? ne treba jer ce sabirati vektori
     operator fun plus(other: Flow): Flow {
diff --git a/gart/src/main/kotlin/dev/oblac/gart/force/FlowGenerators.kt b/gart/src/main/kotlin/dev/oblac/gart/force/FlowGenerators.kt
index 8fef040..8525c7c 100644
--- a/gart/src/main/kotlin/dev/oblac/gart/force/FlowGenerators.kt
+++ b/gart/src/main/kotlin/dev/oblac/gart/force/FlowGenerators.kt
@@ -1,9 +1,9 @@
 package dev.oblac.gart.force
 
+import dev.oblac.gart.angles.Radians
 import dev.oblac.gart.math.PIf
 import dev.oblac.gart.math.RotationDirection
 import dev.oblac.gart.math.RotationDirection.CW
-import dev.oblac.gart.math.normalizeRad
 import kotlin.math.atan2
 import kotlin.math.cos
 import kotlin.math.sin
@@ -26,7 +26,7 @@ class CircularFlow(
             RotationDirection.CCW -> -atan2(-dy, dx)
         }
 
-        return Flow(normalizeRad(theta), magnitude)
+        return Flow(Radians(theta).normalize(), magnitude)
     }
 }
 
@@ -46,7 +46,7 @@ class SpiralFlow(
             RotationDirection.CCW -> -atan2(-dy, dx)
         } + spiralSpeed
 
-        return Flow(normalizeRad(theta), magnitude)
+        return Flow(Radians(theta).normalize(), magnitude)
     }
 }
 
@@ -60,7 +60,7 @@ class WaveFlow(
     override fun invoke(x: Float, y: Float): Flow {
         val a = sin(x * xFreq) * xAmp
         val b = cos(y * yFreq) * yAmp
-        return Flow(a + b, magnitude)
+        return Flow(Radians(a + b), magnitude)
     }
 
 }
diff --git a/gart/src/main/kotlin/dev/oblac/gart/math/math.kt b/gart/src/main/kotlin/dev/oblac/gart/math/math.kt
index 189599f..ee6fddc 100644
--- a/gart/src/main/kotlin/dev/oblac/gart/math/math.kt
+++ b/gart/src/main/kotlin/dev/oblac/gart/math/math.kt
@@ -45,18 +45,3 @@ private fun normalizeDeg(deg: Float): Float {
     }
     return result
 }
-
-/**
- * Calculates the middle angle between two angles. The result is always in the range of -PI..PI.
- * This means that the result is always the shortest angle between the two angles.
- */
-fun middleAngle(a: Float, b: Float): Float {
-    return when (val diff = b - a) {
-        in -PIf..PIf -> normalizeRad(a + diff / 2)
-        in PIf..DOUBLE_PIf -> normalizeRad(a + diff / 2 - PIf)
-        in -DOUBLE_PIf..-PIf -> normalizeRad(a + diff / 2 + PIf)
-        in DOUBLE_PIf..2 * DOUBLE_PIf -> normalizeRad(a + (diff - DOUBLE_PIf) / 2)
-        in -2 * DOUBLE_PIf..-DOUBLE_PIf -> normalizeRad(a + (diff + DOUBLE_PIf) / 2)
-        else -> throw IllegalStateException("Unexpected angle difference: $diff")
-    }
-}
diff --git a/gart/src/test/kotlin/dev/oblac/gart/force/FlowTest.kt b/gart/src/test/kotlin/dev/oblac/gart/force/FlowTest.kt
index 1b2f1f2..635b7bc 100644
--- a/gart/src/test/kotlin/dev/oblac/gart/force/FlowTest.kt
+++ b/gart/src/test/kotlin/dev/oblac/gart/force/FlowTest.kt
@@ -1,5 +1,6 @@
 package dev.oblac.gart.force
 
+import dev.oblac.gart.angles.Radians
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
 
@@ -7,8 +8,8 @@ class FlowTest {
 
     @Test
     fun addOppositeFlows() {
-        val right = Flow(0f, 1f)
-        val left = Flow(Math.PI.toFloat(), 1f)
+        val right = Flow(Radians.ZERO, 1f)
+        val left = Flow(Radians.PI, 1f)
 
         val result = right + left