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Mark Minas
2024-09-18 17:04:31 +02:00
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Projekte/common/src/test/java/pp/util/AngleTest.java Normal file
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////////////////////////////////////////
// Programming project code
// UniBw M, 2022, 2023, 2024
// www.unibw.de/inf2
// (c) Mark Minas (mark.minas@unibw.de)
////////////////////////////////////////
package pp.util;
import org.junit.Test;
import static java.lang.Math.min;
import static org.junit.Assert.assertEquals;
import static pp.util.FloatMath.DEG_TO_RAD;
import static pp.util.FloatMath.ZERO_TOLERANCE;
import static pp.util.FloatMath.cos;
import static pp.util.FloatMath.sin;
public class AngleTest {
@Test
public void compareAngles() {
for (int i = 0; i < 360; i++) {
final Angle u = Angle.fromDegrees(i);
for (int j = 0; j < 360; j++) {
final Angle v = Angle.fromDegrees(j);
assertEquals("compare " + i + "° and " + j + "°", Integer.compare(i, j), (Object) u.compareTo(v));
}
}
}
@Test
public void addAngles() {
for (int i = 0; i < 360; i++) {
final Angle u = Angle.fromDegrees(i);
for (int j = 0; j < 360; j++) {
final Angle v = Angle.fromDegrees(j);
final Angle sum = u.plus(v);
assertEquals(i + "° + " + j + "°, x coordinate", cos((i + j) * DEG_TO_RAD), sum.x, ZERO_TOLERANCE);
assertEquals(i + "° + " + j + "°, y coordinate", sin((i + j) * DEG_TO_RAD), sum.y, ZERO_TOLERANCE);
}
}
}
@Test
public void subtractAngles() {
for (int i = 0; i < 360; i++) {
final Angle u = Angle.fromDegrees(i);
for (int j = 0; j < 360; j++) {
final Angle v = Angle.fromDegrees(j);
final Angle diff = u.minus(v);
assertEquals(i + "° - " + j + "°, x coordinate", cos((i - j) * DEG_TO_RAD), diff.x, ZERO_TOLERANCE);
assertEquals(i + "° - " + j + "°, y coordinate", sin((i - j) * DEG_TO_RAD), diff.y, ZERO_TOLERANCE);
}
}
}
@Test
public void minAngle() {
for (int i = 0; i < 360; i++) {
final Angle u = Angle.fromDegrees(i);
for (int j = 0; j < 360; j++) {
final Angle v = Angle.fromDegrees(j);
final Angle diff = Angle.min(u, v);
assertEquals(i + "° - " + j + "°, x coordinate", cos(min(i, j) * DEG_TO_RAD), diff.x, ZERO_TOLERANCE);
assertEquals(i + "° - " + j + "°, y coordinate", sin(min(i, j) * DEG_TO_RAD), diff.y, ZERO_TOLERANCE);
}
}
}
@Test
public void bisector() {
for (int right = 0; right < 360; right++) {
final Angle rightAngle = Angle.fromDegrees(right);
for (int add = 0; add < 360; add++) {
final int left = right + add;
final Angle bisector = Angle.fromDegrees(left).bisector(rightAngle);
final float exp = (right + 0.5f * add) * DEG_TO_RAD;
assertEquals("left=" + left + "° / right=" + right + "°, x coordinate", cos(exp), bisector.x, ZERO_TOLERANCE);
assertEquals("left=" + left + "° / right=" + right + "°, y coordinate", sin(exp), bisector.y, ZERO_TOLERANCE);
}
}
}
@Test
public void leftOf() {
for (int right = 0; right < 360; right++) {
final Angle rightAngle = Angle.fromDegrees(right);
for (int add = 1; add < 360; add++)
if (add != 180) {
final int left = right + add;
final Angle leftAngle = Angle.fromDegrees(left);
assertEquals(left + "° left of " + right + "°", add < 180, leftAngle.leftOf(rightAngle));
}
}
}
@Test
public void rightOf() {
for (int right = 0; right < 360; right++) {
final Angle rightAngle = Angle.fromDegrees(right);
for (int add = 1; add < 360; add++)
if (add != 180) {
final int left = right + add;
final Angle leftAngle = Angle.fromDegrees(left);
assertEquals(left + "° right of " + right + "°", add > 180, leftAngle.rightOf(rightAngle));
}
}
}
}