84 lines
2.8 KiB
Java
84 lines
2.8 KiB
Java
import org.junit.jupiter.api.Test;
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import processing.core.PApplet;
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import static java.lang.Math.*;
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import static org.junit.jupiter.api.Assertions.*;
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class VectorTest{
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@Test
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public void vector2DOperations(){
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for(int i = 0; i < 20; i++){
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float x1 = (float)(1000*random() - 500);
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float y1 = (float)(1000*random() - 500);
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Vector v1 = new Vector(x1, y1);
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for(int j = 0; j < 20; j++){
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float x2 = (float)(1000*random());
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float y2 = (float)(1000*random());
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Vector v2 = new Vector(x2, y2);
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// test general setters
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assertFloatEquals(x1, v1.x);
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assertFloatEquals(y1, v1.y);
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assertFloatEquals(x2, v2.x);
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assertFloatEquals(y2, v2.y);
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// test magnitude
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assertFloatEquals((float)sqrt(x1*x1 + y1*y1), v1.mag());
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assertFloatEquals((float)sqrt(x2*x2 + y2*y2), v2.mag());
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// test dot product
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assertFloatEquals((float)(x1*x2+y1*y2), v1.dot(v2));
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assertFloatEquals((float)(x1*x2+y1*y2), v2.dot(v1));
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// test addition
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Vector vSum = v1.add(v2);
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assertFloatEquals(x1+x2, vSum.x);
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assertFloatEquals(y1+y2, vSum.y);
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// test subtraction
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Vector vSub = v1.sub(v2);
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assertFloatEquals(x1-x2, vSub.x);
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assertFloatEquals(y1-y2, vSub.y);
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vSub = v2.sub(v1);
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assertFloatEquals(x2-x1, vSub.x);
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assertFloatEquals(y2-y1, vSub.y);
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// test scaling
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Vector vScale = v1.mul(x2);
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assertFloatEquals(x1*x2, vScale.x);
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assertFloatEquals(y1*x2, vScale.y);
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// test normalization
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Vector vNorm = v1.normalize();
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assertFloatEquals(1, vNorm.mag());
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}
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}
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}
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public void assertFloatEquals(float expected, float actual){
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assertFloatEquals(expected, actual, (float)0.0001);
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}
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public void assertFloatEquals(float expected, float actual, float range){
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assertTrue(abs(expected-actual) < range);
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}
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@Test
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public void testCrossProduct(){
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Vector v1 = new Vector(1, 2, 3);
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Vector v2 = new Vector(4, 5, 6);
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Vector cross = v1.cross(v2);
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assertFloatEquals(-3, cross.x);
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assertFloatEquals(6, cross.y);
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assertFloatEquals(-3, cross.z);
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v1 = new Vector(-3, 7, -9);
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v2 = new Vector((float)2.6, 66, (float)-3.14159);
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cross = v1.cross(v2);
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assertFloatEquals((float)572.00887, cross.x, (float)0.1);
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assertFloatEquals((float)-32.82477, cross.y, (float)0.1);
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assertFloatEquals((float)-216.2, cross.z, (float)0.1);
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}
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} |