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PMatrix2DTest.java
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186 lines (156 loc) · 4.64 KB
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package processing.core;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class PMatrix2DTest {
private PMatrix2D m;
@Before
public void setUp() {
m = new PMatrix2D();
}
@Test
public void testIdentity() {
assertTrue("New matrix should be identity", m.isIdentity());
float[] arr = m.get(null);
assertEquals(1, arr[0], 0.0001f); // m00
assertEquals(0, arr[1], 0.0001f); // m01
assertEquals(0, arr[2], 0.0001f); // m02
assertEquals(0, arr[3], 0.0001f); // m10
assertEquals(1, arr[4], 0.0001f); // m11
assertEquals(0, arr[5], 0.0001f); // m12
}
@Test
public void testTranslate() {
m.translate(10, 20);
assertEquals(10, m.m02, 0.0001f);
assertEquals(20, m.m12, 0.0001f);
}
@Test
public void testRotate() {
m.rotate(PConstants.HALF_PI);
assertEquals(0, m.m00, 0.0001f);
assertEquals(-1, m.m01, 0.0001f);
assertEquals(1, m.m10, 0.0001f);
assertEquals(0, m.m11, 0.0001f);
}
@Test
public void testScale() {
m.scale(2, 3);
assertEquals(2, m.m00, 0.0001f);
assertEquals(3, m.m11, 0.0001f);
assertEquals(0, m.m02, 0.0001f);
assertEquals(0, m.m12, 0.0001f);
}
@Test
public void testShear() {
float shearAngle = 0.2f;
m.shearX(shearAngle);
assertEquals(0, m.m01, 0.0001f);
assertEquals((float)Math.tan(shearAngle), m.m10, 0.0001f);
assertEquals(1, m.m02, 0.0001f);
m.reset();
m.shearY(shearAngle);
assertEquals(0, m.m01, 0.0001f);
assertEquals(0, m.m10, 0.0001f);
assertEquals((float)Math.tan(shearAngle), m.m11, 0.0001f);
assertEquals(1, m.m02, 0.0001f);
}
@Test
public void testApply() {
PMatrix2D m2 = new PMatrix2D(1, 2, 3, 4, 5, 6);
m.apply(m2);
assertEquals(m2.m00, m.m00, 0.0001f);
assertEquals(m2.m01, m.m01, 0.0001f);
assertEquals(m2.m02, m.m02, 0.0001f);
assertEquals(m2.m10, m.m10, 0.0001f);
assertEquals(m2.m11, m.m11, 0.0001f);
assertEquals(m2.m12, m.m12, 0.0001f);
}
@Test
public void testPreApply() {
PMatrix2D m1 = new PMatrix2D(1, 2, 3, 4, 5, 6);
m.reset(); // identity matrix
m.preApply(m1);
assertEquals(m1.m00, m.m00, 0.0001f);
assertEquals(m1.m01, m.m01, 0.0001f);
assertEquals(m1.m02, m.m02, 0.0001f);
assertEquals(m1.m10, m.m10, 0.0001f);
assertEquals(m1.m11, m.m11, 0.0001f);
assertEquals(m1.m12, m.m12, 0.0001f);
}
@Test
public void testMultPVector() {
PVector src = new PVector(1, 2, 0);
PVector result = m.mult(src, null);
assertEquals(src.x, result.x, 0.0001f);
assertEquals(src.y, result.y, 0.0001f);
}
@Test
public void testMultArray() {
float[] vec = { 1, 2 };
float[] out = m.mult(vec, null);
assertEquals(1, out[0], 0.0001f);
assertEquals(2, out[1], 0.0001f);
}
@Test
public void testMultXandY() {
float x = 10, y = 20;
float xOut = m.multX(x, y);
float yOut = m.multY(x, y);
assertEquals(x, xOut, 0.0001f);
assertEquals(y, yOut, 0.0001f);
}
@Test
public void testInvertAndDeterminant() {
m.set(2, 0, 5, 1, 3, 7);
float det = m.determinant();
assertEquals(6, det, 0.0001f);
boolean invertible = m.invert();
assertTrue("Matrix should be invertible", invertible);
PMatrix2D identity = new PMatrix2D(2, 0, 5, 1, 3, 7);
identity.apply(m);
assertEquals(1, identity.m00, 0.001f);
assertEquals(0, identity.m01, 0.001f);
assertEquals(0, identity.m10, 0.001f);
assertEquals(1, identity.m11, 0.001f);
}
@Test
public void testIdentityWarped() {
assertTrue(m.isIdentity());
assertFalse(m.isWarped());
m.translate(10, 20);
assertFalse(m.isIdentity());
}
@Test(expected = IllegalArgumentException.class)
public void testTranslate3DThrows() {
m.translate(1, 2, 3);
}
@Test(expected = IllegalArgumentException.class)
public void testRotateXThrows() {
m.rotateX(1);
}
@Test(expected = IllegalArgumentException.class)
public void testRotateYThrows() {
m.rotateY(1);
}
@Test(expected = IllegalArgumentException.class)
public void testScale3DThrows() {
m.scale(1, 2, 3);
}
@Test(expected = IllegalArgumentException.class)
public void testApplyPMatrix3DThrows() {
PMatrix3D m3d = new PMatrix3D(1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
m.apply(m3d);
}
@Test
public void testGetArray() {
m.set(new float[]{1, 2, 0, 0, 1, 0});
float[] arr = m.get(null);
assertEquals(1, arr[0], 0.0001f);
assertEquals(2, arr[1], 0.0001f);
assertEquals(0, arr[2], 0.0001f);
}
}