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Add rotation methods

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Adds the `rotateAroundX(double)`, `rotateAroundY(double)` and `rotateAroundZ(double)` methods
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MrGazdag 2021-07-04 17:54:43 +02:00 committed by GitHub
parent 1a55644c5e
commit 118159d354
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src/main/java/net/minestom/server/utils/incubator/Vec.java
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@ -279,6 +279,72 @@ public final class Vec implements Point {
z * o.x - o.z * x,
x * o.y - o.x * y);
}
/**
* Rotates the vector around the x axis.
* <p>
* This piece of math is based on the standard rotation matrix for vectors
* in three dimensional space. This matrix can be found here:
* <a href="https://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations">Rotation
* Matrix</a>.
*
* @param angle the angle to rotate the vector about. This angle is passed
* in radians
* @return a new, rotated vector
*/
@NotNull
public Vec rotateAroundX(double angle) {
double angleCos = Math.cos(angle);
double angleSin = Math.sin(angle);
double newY = angleCos * y - angleSin * z;
double newZ = angleSin * y + angleCos * z;
return new Vec(x, newY, newZ);
}
/**
* Rotates the vector around the y axis.
* <p>
* This piece of math is based on the standard rotation matrix for vectors
* in three dimensional space. This matrix can be found here:
* <a href="https://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations">Rotation
* Matrix</a>.
*
* @param angle the angle to rotate the vector about. This angle is passed
* in radians
* @return a new, rotated vector
*/
@NotNull
public Vec rotateAroundY(double angle) {
double angleCos = Math.cos(angle);
double angleSin = Math.sin(angle);
double newX = angleCos * x + angleSin * z;
double newZ = -angleSin * x + angleCos * z;
return new Vec(newX, y, newZ);
}
/**
* Rotates the vector around the z axis
* <p>
* This piece of math is based on the standard rotation matrix for vectors
* in three dimensional space. This matrix can be found here:
* <a href="https://en.wikipedia.org/wiki/Rotation_matrix#Basic_rotations">Rotation
* Matrix</a>.
*
* @param angle the angle to rotate the vector about. This angle is passed
* in radians
* @return a new, rotated vector
*/
@NotNull
public Vec rotateAroundZ(double angle) {
double angleCos = Math.cos(angle);
double angleSin = Math.sin(angle);
double newX = angleCos * x - angleSin * y;
double newY = angleSin * x + angleCos * y;
return new Vec(newX, newY, z);
}
/**
* Calculates a linear interpolation between this vector with another