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Added unit tests for `PMatrix3D` in `processing:core` by Rishab87 · Pull Request #1029 · processing/processing4 · GitHub

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Added unit tests for PMatrix3D in processing:core #1029

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Merged
catilac merged 2 commits into from
Feb 20, 2026
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Added unit tests for PMatrix3D in processing:core #1029

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105bc96
added unit tests for Pmatrix 3D
Rishab87 Apr 5, 2025
588390f
added unit tests for Pmatrix 3D
Rishab87 Apr 5, 2025
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226 changes: 226 additions & 0 deletions core/test/processing/core/PMatrix3DTest.java
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package processing.core;

import static org.junit.Assert.*;
import org.junit.Test;

public class PMatrix3DTest {

@Test
public void testConstructorsResetAndGet() {
PMatrix3D m = new PMatrix3D();
float[] vals = m.get(null);
assertEquals(1, vals[0], 1e-6);
assertEquals(1, vals[5], 1e-6);
assertEquals(1, vals[10], 1e-6);
assertEquals(1, vals[15], 1e-6);

m.m00 = 2;
m.reset();
vals = m.get(null);
assertEquals(1, vals[0], 1e-6);
}

@Test
public void testSetAndGetMethods() {
PMatrix3D m = new PMatrix3D();
float[] source = {
2, 3, 4, 5,
6, 7, 8, 9,
10,11,12,13,
14,15,16,17
};
m.set(source);
float[] target = m.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(source[i], target[i], 1e-6);
}

m.set(1, 2, 3, 4, 5, 6);
target = m.get(null);
assertEquals(1, target[0], 1e-6);
assertEquals(2, target[1], 1e-6);
assertEquals(0, target[2], 1e-6);
assertEquals(3, target[3], 1e-6);

PMatrix2D m2d = new PMatrix2D(1, 2, 3, 4, 5, 6);
m.set(m2d);
target = m.get(null);
assertEquals(1, target[0], 1e-6);
assertEquals(2, target[1], 1e-6);
assertEquals(0, target[2], 1e-6);
assertEquals(3, target[3], 1e-6);
}

@Test
public void testTranslate() {
PMatrix3D m = new PMatrix3D();
m.translate(0, 0, 0);
float[] original = new PMatrix3D().get(null);
float[] result = m.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(original[i], result[i], 1e-6);
}

m.reset();
m.translate(10, -5, 3);
result = m.get(null);
assertEquals(10, result[3], 1e-6);
assertEquals(-5, result[7], 1e-6);
assertEquals(3, result[11], 1e-6);
assertEquals(1, result[15], 1e-6);
}

@Test
public void testRotateAndShear() {
PMatrix3D m = new PMatrix3D();
m.reset();
m.rotate(0);
float[] original = new PMatrix3D().get(null);
float[] result = m.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(original[i], result[i], 1e-6);
}

m.reset();
m.rotateZ((float) Math.PI / 2);
result = m.get(null);
assertEquals(0, result[0], 1e-6);
assertEquals(-1, result[1], 1e-6);
assertEquals(1, result[4], 1e-6);
assertEquals(0, result[5], 1e-6);

m.reset();
m.shearX((float) Math.PI / 4);
result = m.get(null);
float expectedT = (float) Math.tan(Math.PI / 4);
assertEquals(expectedT, result[1], 1e-6);

m.reset();
m.shearY((float) Math.PI / 4);
result = m.get(null);
assertEquals(expectedT, result[4], 1e-6);
}

@Test
public void testScale() {
PMatrix3D m = new PMatrix3D();
m.reset();
m.scale(1);
float[] original = new PMatrix3D().get(null);
float[] result = m.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(original[i], result[i], 1e-6);
}

m.reset();
m.scale(2, 3, 4);
result = m.get(null);
assertEquals(2, result[0], 1e-6);
assertEquals(3, result[5], 1e-6);
assertEquals(4, result[10], 1e-6);

m.reset();
m.scale(0, 1, 1);
result = m.get(null);
assertEquals(0, result[0], 1e-6);
}

@Test
public void testApplyAndPreApply() {
PMatrix3D m = new PMatrix3D();
m.reset();
PMatrix3D n = new PMatrix3D(
2, 3, 4, 5,
6, 7, 8, 9,
10,11,12,13,
14,15,16,17
);
m.apply(n);
float[] result = m.get(null);
float[] expected = n.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(expected[i], result[i], 1e-6);
}

m.reset();
m.preApply(n);
result = m.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(expected[i], result[i], 1e-6);
}
}

@Test
public void testMultMethods() {
PMatrix3D m = new PMatrix3D();
m.reset();
PVector p = new PVector(1, 2, 3);
PVector resultP = m.mult(p, null);
assertEquals(1, resultP.x, 1e-6);
assertEquals(2, resultP.y, 1e-6);
assertEquals(3, resultP.z, 1e-6);

float[] vec3 = {1, 2, 3};
float[] out3 = m.mult(vec3, new float[3]);
assertEquals(1, out3[0], 1e-6);
assertEquals(2, out3[1], 1e-6);
assertEquals(3, out3[2], 1e-6);

float[] vec4 = {1, 2, 3, 4};
float[] out4 = m.mult(vec4, new float[4]);
for (int i = 0; i < 4; i++) {
assertEquals(vec4[i], out4[i], 1e-6);
}

try {
m.mult(vec3, vec3);
fail("Expected RuntimeException for identical source and target arrays.");
} catch (RuntimeException e) {
// Exception expected.
}

m.reset();
m.translate(10, 20, 30);
float x = m.multX(1, 2, 3);
float y = m.multY(1, 2, 3);
float z = m.multZ(1, 2, 3);
float w = m.multW(1, 2, 3);
assertEquals(1 + 10, x, 1e-6);
assertEquals(2 + 20, y, 1e-6);
assertEquals(3 + 30, z, 1e-6);
assertEquals(1, w, 1e-6);
}

@Test
public void testTransposeAndDeterminant() {
PMatrix3D m = new PMatrix3D(
2, 3, 4, 5,
6, 7, 8, 9,
10,11,12,13,
14,15,16,17
);
float det = m.determinant();
m.transpose();
float det2 = m.determinant();
assertEquals(det, det2, 1e-6);
}

@Test
public void testInvert() {
PMatrix3D m = new PMatrix3D();
m.reset();
boolean inverted = m.invert();
assertTrue(inverted);
float[] result = m.get(null);
PMatrix3D identity = new PMatrix3D();
float[] idArr = identity.get(null);
for (int i = 0; i < 16; i++) {
assertEquals(idArr[i], result[i], 1e-6);
}

m.reset();
m.scale(0, 1, 1);
inverted = m.invert();
assertFalse(inverted);
}
}
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