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Update interpolation tests
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‎src/test/kotlin/com/kylecorry/sol/math/interpolation/InterpolationTest.kt‎

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@@ -2,6 +2,7 @@ package com.kylecorry.sol.math.interpolation
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import com.kylecorry.sol.math.Vector2
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import org.junit.jupiter.api.Assertions.assertEquals
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import org.junit.jupiter.api.Assertions.assertTrue
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import org.junit.jupiter.api.Test
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class InterpolationTest {
@@ -31,4 +32,121 @@ class InterpolationTest {
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}
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}
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@Test
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fun linearVector() {
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val point1 = Vector2(0f, 0f)
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val point2 = Vector2(2f, 4f)
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assertEquals(0f, Interpolation.linear(0f, point1, point2), 0.0001f)
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assertEquals(2f, Interpolation.linear(1f, point1, point2), 0.0001f)
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assertEquals(4f, Interpolation.linear(2f, point1, point2), 0.0001f)
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assertEquals(1f, Interpolation.linear(0.5f, point1, point2), 0.0001f)
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val point3 = Vector2(-2f, -4f)
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val point4 = Vector2(2f, 4f)
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assertEquals(0f, Interpolation.linear(0f, point3, point4), 0.0001f)
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assertEquals(-2f, Interpolation.linear(-1f, point3, point4), 0.0001f)
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}
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@Test
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fun linear() {
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assertEquals(0f, Interpolation.linear(0f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(2f, Interpolation.linear(1f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(4f, Interpolation.linear(2f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(1f, Interpolation.linear(0.5f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(6f, Interpolation.linear(3f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(-2f, Interpolation.linear(-1f, 0f, 0f, 2f, 4f), 0.0001f)
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assertEquals(5f, Interpolation.linear(1f, 0f, 5f, 2f, 5f), 0.0001f)
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assertEquals(50f, Interpolation.linear(1f, 0f, 0f, 2f, 100f), 0.0001f)
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}
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@Test
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fun cubicVector() {
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val point0 = Vector2(0f, 0f)
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val point1 = Vector2(1f, 1f)
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val point2 = Vector2(2f, 4f)
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val point3 = Vector2(3f, 9f)
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assertEquals(1f, Interpolation.cubic(1f, point0, point1, point2, point3), 0.0001f)
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assertEquals(4f, Interpolation.cubic(2f, point0, point1, point2, point3), 0.0001f)
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assertEquals(2.25f, Interpolation.cubic(1.5f, point0, point1, point2, point3), 0.0001f)
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}
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@Test
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fun cubic() {
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assertEquals(1f, Interpolation.cubic(1f, 0f, 0f, 1f, 1f, 2f, 4f, 3f, 9f), 0.0001f)
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assertEquals(4f, Interpolation.cubic(2f, 0f, 0f, 1f, 1f, 2f, 4f, 3f, 9f), 0.0001f)
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assertEquals(2.25f, Interpolation.cubic(1.5f, 0f, 0f, 1f, 1f, 2f, 4f, 3f, 9f), 0.0001f)
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}
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@Test
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fun interpolate() {
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// 3 points (quadratic interpolation)
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val xs = listOf(0f, 1f, 2f)
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val ys = listOf(0f, 1f, 4f)
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assertEquals(0f, Interpolation.interpolate(0f, xs, ys), 0.0001f)
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assertEquals(1f, Interpolation.interpolate(1f, xs, ys), 0.0001f)
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assertEquals(4f, Interpolation.interpolate(2f, xs, ys), 0.0001f)
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assertEquals(0.25f, Interpolation.interpolate(0.5f, xs, ys), 0.0001f)
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// 4 points (cubic interpolation)
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val xs2 = listOf(0f, 1f, 2f, 3f)
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val ys2 = listOf(0f, 1f, 8f, 27f)
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assertEquals(0f, Interpolation.interpolate(0f, xs2, ys2), 0.0001f)
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assertEquals(1f, Interpolation.interpolate(1f, xs2, ys2), 0.0001f)
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assertEquals(8f, Interpolation.interpolate(2f, xs2, ys2), 0.0001f)
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assertEquals(27f, Interpolation.interpolate(3f, xs2, ys2), 0.0001f)
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assertEquals(0.125f, Interpolation.interpolate(0.5f, xs2, ys2), 0.001f)
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}
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@Test
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fun getMultiplesBetweenFloat() {
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val result1 = Interpolation.getMultiplesBetween(0f, 10f, 2f)
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assertEquals(listOf(0f, 2f, 4f, 6f, 8f, 10f), result1)
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val result2 = Interpolation.getMultiplesBetween(1f, 9f, 2f)
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assertEquals(listOf(2f, 4f, 6f, 8f), result2)
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val result3 = Interpolation.getMultiplesBetween(0f, 2f, 0.5f)
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assertEquals(listOf(0f, 0.5f, 1f, 1.5f, 2f), result3)
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val result4 = Interpolation.getMultiplesBetween(-5f, 5f, 2.5f)
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assertEquals(listOf(-5f, -2.5f, 0f, 2.5f, 5f), result4)
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val result5 = Interpolation.getMultiplesBetween(0.1f, 0.4f, 1f)
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assertTrue(result5.isEmpty())
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val result6 = Interpolation.getMultiplesBetween(2f, 2f, 1f)
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assertEquals(listOf(2f), result6)
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}
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@Test
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fun getMultiplesBetweenDouble() {
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val result1 = Interpolation.getMultiplesBetween(0.0, 10.0, 2.0)
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assertEquals(listOf(0.0, 2.0, 4.0, 6.0, 8.0, 10.0), result1)
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val result2 = Interpolation.getMultiplesBetween(1.0, 9.0, 2.0)
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assertEquals(listOf(2.0, 4.0, 6.0, 8.0), result2)
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val result3 = Interpolation.getMultiplesBetween(0.0, 2.0, 0.5)
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assertEquals(listOf(0.0, 0.5, 1.0, 1.5, 2.0), result3)
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val result4 = Interpolation.getMultiplesBetween(-5.0, 5.0, 2.5)
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assertEquals(listOf(-5.0, -2.5, 0.0, 2.5, 5.0), result4)
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val result5 = Interpolation.getMultiplesBetween(0.1, 0.4, 1.0)
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assertTrue(result5.isEmpty())
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val result6 = Interpolation.getMultiplesBetween(2.0, 2.0, 1.0)
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assertEquals(listOf(2.0), result6)
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val result7 = Interpolation.getMultiplesBetween(0.0, 0.31, 0.1)
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assertEquals(4, result7.size)
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assertEquals(0.0, result7[0], 0.0001)
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assertEquals(0.1, result7[1], 0.0001)
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assertEquals(0.2, result7[2], 0.0001)
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assertEquals(0.3, result7[3], 0.0001)
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}
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}

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