46 lines
1.3 KiB
Java
46 lines
1.3 KiB
Java
package org.oscim.utils;
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import org.junit.Assert;
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import org.junit.Test;
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import org.oscim.utils.geom.GeometryUtils;
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public class GeometryTest {
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@Test
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public void testIsTrisClockwise() {
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float[] pA = new float[]{0, 0};
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float[] pB = new float[]{1, 1};
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float[] pC = new float[]{1, 0};
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float area = GeometryUtils.isTrisClockwise(pA, pB, pC);
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Assert.assertTrue(area > 0);
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area = GeometryUtils.isTrisClockwise(pA, pC, pB);
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Assert.assertTrue(area < 0);
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}
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@Test
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public void testIsClockwise() {
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float[] points = new float[]{0, 0, 1, 1, 1, 0};
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float area = GeometryUtils.isClockwise(points, points.length);
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Assert.assertTrue(area > 0);
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points = new float[]{0, 0, 1, 0, 1, 1};
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area = GeometryUtils.isClockwise(points, points.length);
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Assert.assertTrue(area < 0);
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}
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@Test
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public void testDotProduct() {
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float[] p = {-1, 0, 0, 0, 0, 0};
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for (int i = 0; i < 9; i++) {
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p[4] = (float) Math.cos(Math.toRadians(i * 45));
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p[5] = (float) Math.sin(Math.toRadians(i * 45));
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System.out.println("\n> " + (i * 45) + " " + p[3] + ":" + p[4] + "\n="
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+ GeometryUtils.dotProduct(p, 0, 2, 4));
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}
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}
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}
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