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Added angleDiff() function to vector to get the difference in angle from one vector to another.

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This commit is contained in:
Quinn
2023-04-06 10:54:53 -05:00
parent 7438d0f64e
commit a06415f371
2 changed files with 19 additions and 0 deletions
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6
src/Vector.java
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@@ -1,3 +1,4 @@
import static java.lang.Math.acos;
import static java.lang.Math.sqrt; import static java.lang.Math.sqrt;
public class Vector { public class Vector {
@@ -65,4 +66,9 @@ public class Vector {
float mag = this.mag(); float mag = this.mag();
return new Vector(x / mag, y / mag, z / mag); return new Vector(x / mag, y / mag, z / mag);
} }
float angleDiff(Vector other){
float dot = this.dot(other);
return (float)acos(dot / (this.mag() * other.mag()));
}
} }

13
tests/VectorTest.java
View File

@@ -81,4 +81,17 @@ class VectorTest{
assertFloatEquals((float)-216.2, cross.z, (float)0.1); assertFloatEquals((float)-216.2, cross.z, (float)0.1);
} }
@Test
public void testAngleDiff(){
Vector v1 = new Vector(1, 0);
Vector v2 = new Vector(0, 1);
Vector v3 = new Vector(-1, 0);
assertFloatEquals(v1.angleDiff(v1), 0);
assertFloatEquals(v1.angleDiff(v2), (float) toRadians(90));
assertFloatEquals(v1.angleDiff(v3), (float) toRadians(180));
assertFloatEquals(v1.angleDiff(v1.mul(100)), 0);
assertFloatEquals(v1.angleDiff(v2.mul(100)), (float) toRadians(90));
}
} }