TatsuyaAPI - Choose it and change.

TatsuyaAPI is an API for developing spigot plugins that facilitates and gives you resolutions for calculating complex regions such as parallelepipeds and irregular triangles and three-dimensional shapes. There are more than 30 forms available. TatsuyaAPI also gives you complex animation presets for you to use in your plugins. Say goodbye to complex calculations, use TatsuyaAPI.

Documentation

Creating shapes

Square

Square square = PolygonBuilder.getOf(PolygonShape.SQUARE)
 .side(4).build()

Triangle

Triangle triangle = PolygonBuilder.getOf(PolygonShape.TRIANGLE)
 .leftSide(3).rightSide(3) // isosceles
 .height(5).build();