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Add Interpolation interface

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TheMode 2021-06-30 06:03:29 +02:00
parent 2f7ba7e514
commit 58dd927afb
1 changed files with 30 additions and 1 deletions
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31
src/main/java/net/minestom/server/utils/incubator/Vec.java
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@ -246,14 +246,43 @@ public interface Vec {
* @param o the other vector
* @return the same vector
*/
default @NotNull Vec crossProduct(@NotNull Vec o) {
default @NotNull Vec cross(@NotNull Vec o) {
return with(y() * o.z() - o.y() * z(),
z() * o.x() - o.z() * x(),
x() * o.y() - o.x() * y());
}
/**
* Calculates a linear interpolation between this vector with another
* vector.
*
* @param vec the other vector
* @param alpha The alpha value, must be between 0.0 and 1.0
* @return Linear interpolated vector
*/
default @NotNull Vec lerp(@NotNull Vec vec, double alpha) {
final double x = x();
final double y = y();
final double z = z();
return with(x + (alpha * (vec.x() - x)),
y + (alpha * (vec.y() - y)),
z + (alpha * (vec.z() - z)));
}
default @NotNull Vec interpolate(@NotNull Vec target, double alpha, @NotNull Interpolation interpolation) {
return lerp(target, interpolation.apply(alpha));
}
@FunctionalInterface
interface Operator {
@NotNull Vec apply(double x, double y, double z);
}
@FunctionalInterface
interface Interpolation {
Interpolation LINEAR = a -> a;
Interpolation SMOOTH = a -> a * a * (3 - 2 * a);
double apply(double a);
}
}