package com.hackoeur.jglm;
import java.nio.FloatBuffer;
import java.util.Iterator;
import org.junit.Assert;
import org.junit.Test;
/**
* @author James Royalty [Feb 3, 2013]
*/
public class Mat3Test {
@Test
public void testNewWithDiagonalValue() {
Mat3 m1 = new Mat3(1f);
Mat3 m2 = Mat3.MAT3_IDENTITY;
Assert.assertEquals(m2, m1);
Mat3 m3 = new Mat3(4f);
JglmTesting.assertFloatsEqualDefaultTol(4f, m3.m00);
JglmTesting.assertFloatsEqualDefaultTol(4f, m3.m11);
JglmTesting.assertFloatsEqualDefaultTol(4f, m3.m22);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m01);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m02);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m10);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m12);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m20);
JglmTesting.assertFloatsEqualDefaultTol(0f, m3.m21);
}
@Test
public void testNewWithVec3() {
Vec3 v1 = new Vec3(1f, 2f, 3f);
Vec3 v2 = new Vec3(4f, 5f, 6f);
Vec3 v3 = new Vec3(7f, 8f, 9f);
Mat3 m1 = new Mat3(v1, v2, v3);
Mat3 m2 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Assert.assertEquals(m2, m1);
}
@Test
public void testNewWithArray() {
Mat3 m1 = new Mat3(new float[] { 1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 9f });
Mat3 m2 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Assert.assertEquals(m2, m1);
}
@Test
public void testNewWithBuffer() {
FloatBuffer buffer = FloatBuffer.allocate(9);
buffer.put(1f).put(2f).put(3f).put(4f).put(5f).put(6f).put(7f).put(8f).put(9f);
buffer.flip();
Mat3 m1 = new Mat3(buffer);
Mat3 m2 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Assert.assertEquals(m2, m1);
}
@Test
public void testNewCopy() {
Mat3 m1 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Mat3 m2 = new Mat3(m1);
Assert.assertEquals(m1, m2);
}
@Test
public void testSize() {
Mat3 m1 = new Mat3();
Assert.assertEquals(3, m1.getNumRows());
Assert.assertEquals(3, m1.getNumColumns());
}
@Test
public void testGetColumn() {
Mat3 m1 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Assert.assertEquals(new Vec3(1f, 2f, 3f), m1.getColumn(0));
Assert.assertEquals(new Vec3(4f, 5f, 6f), m1.getColumn(1));
Assert.assertEquals(new Vec3(7f, 8f, 9f), m1.getColumn(2));
}
@Test
public void testGetColumns() {
Mat3 m1 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Iterable<Vec3> cols = m1.getColumns();
Iterator<Vec3> iter = cols.iterator();
Assert.assertEquals(new Vec3(1f, 2f, 3f), iter.next());
Assert.assertEquals(new Vec3(4f, 5f, 6f), iter.next());
Assert.assertEquals(new Vec3(7f, 8f, 9f), iter.next());
Assert.assertFalse(iter.hasNext());
}
@Test
public void testZero() {
Assert.assertTrue(Mat3.MAT3_ZERO.isZero());
Assert.assertFalse(Mat3.MAT3_IDENTITY.isZero());
Mat3 m1 = new Mat3(0f);
Assert.assertTrue(m1.isZero());
Assert.assertEquals(Mat3.MAT3_ZERO, m1);
Assert.assertEquals(Mat3.MAT3_ZERO, new Mat3());
}
@Test
public void testIdentity() {
Assert.assertTrue(Mat3.MAT3_IDENTITY.isIdentity());
Assert.assertFalse(Mat3.MAT3_IDENTITY.isZero());
Assert.assertEquals(Mat3.MAT3_IDENTITY, new Mat3(1f));
Assert.assertTrue(new Mat3(1f).isIdentity());
FloatBuffer buffer = Mat3.MAT3_IDENTITY.getBuffer();
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
// Should be able to get a "fresh" buffer.
buffer = Mat3.MAT3_IDENTITY.getBuffer();
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(0f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
}
@Test
public void testMultiplyScalar() {
Mat3 m1 = new Mat3(1f, 2f, 3f, 0f, 0f, 0f, 0f, 0f, 0f);
System.out.println(m1);
System.out.println(m1.multiply(2));
}
@Test
public void testMultiply() {
Mat3 m1 = new Mat3(new float [] {
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
});
Mat3 m2 = new Mat3(new float [] {
10f, 11f, 12f,
13f, 14f, 15f,
16f, 17f, 18f
});
Mat3 mult = m1.multiply(m2);
Mat3 expected = new Mat3(
138f, 171f, 204f,
174f, 216f, 258f,
210f, 261f, 312f
);
Assert.assertEquals(expected, mult);
}
@Test
public void testMultiplyVec() {
Mat3 m1 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
Vec3 v1 = new Vec3(10.0f, 11.0f, 12.0f);
Vec3 result = m1.multiply(v1);
JglmTesting.assertFloatsEqualDefaultTol(138f, result.x);
JglmTesting.assertFloatsEqualDefaultTol(171f, result.y);
JglmTesting.assertFloatsEqualDefaultTol(204f, result.z);
}
@Test
public void testTranspose() {
final Mat3 m1 = new Mat3(
1f, 2f, 3f,
4f, 5f, 6f,
7f, 8f, 9f
);
final Mat3 m1T = m1.transpose();
final FloatBuffer buffer = m1T.getBuffer();
JglmTesting.assertFloatsEqualDefaultTol(1f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(4f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(7f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(2f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(5f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(8f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(3f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(6f, buffer.get());
JglmTesting.assertFloatsEqualDefaultTol(9f, buffer.get());
final Mat3 m1T_T = m1T.transpose();
Assert.assertEquals(m1, m1T_T);
}
@Test
public void testDeterminant() {
Mat3 m1 = new Mat3(
-2f, 2f, 3f,
-1f, 1f, 3f,
2f, 0f, -1f
);
JglmTesting.assertFloatsEqualDefaultTol(6f, m1.determinant());
}
}
