Math Helpers

Arepy ships a small math layer under arepy.math.

Public exports

The current public module exports:

• Vec2
• vec2
• vec2_zero
• Vec3
• vec3
• vec3_zero
• check_collision_point_rec

Vec2

Vec2 is the main 2D vector type used by bundle components such as Transform and RigidBody2D.

In practice, Vec2 is built to handle the operations you reach for constantly in 2D gameplay code:

• scalar multiplication on both sides
• in-place arithmetic operations
• safe normalization of the zero vector

Vec3

Vec3 is the 3D counterpart used by 3D bundle components.

Vec3 covers the same day-to-day needs on the 3D side:

• scalar multiplication on both sides
• in-place arithmetic operations
• safe normalization of zero vectors
• safe angle() behavior when one vector has zero length
• safe project() behavior when the target vector has zero length

Why this matters

These helpers show up all over the engine, especially in movement, transforms, and rendering-related data.