abstract class Eagle::Physics2D::Shape

Overview

A collision shape in a body's local space. Eagle has circles and convex polygons; build concave objects from several convex shapes on one body.

eagle/physics/shapes2d.cr

#aabb : Rect
Bounds in world space.
#area : Float32
Area in square pixels, used for mass.
#inertia_factor : Float32
Moment of inertia per unit mass about the shape's center.
#local_aabb : Rect
Bounds in the body's local space.
#offset : Vec2
Offset from the body's origin.
#offset=(offset : Vec2)
Offset from the body's origin.
#transformed(t : Transform2D) : Shape
A world-space copy of the shape.

abstract def aabb : Rect #

Bounds in world space. Valid on transformed shapes.

abstract def area : Float32 #

Area in square pixels, used for mass.

abstract def inertia_factor : Float32 #

Moment of inertia per unit mass about the shape's center.

abstract def local_aabb : Rect #

Bounds in the body's local space.

def offset : Vec2 #

Offset from the body's origin.

def offset=(offset : Vec2) #

Offset from the body's origin.

abstract def transformed(t : Transform2D) : Shape #

A world-space copy of the shape.