Math

:= []

Math module - small 2D helpers for examples and simple games.

Coordinates use the same screen-space convention as Draw: x grows to the right, y grows downward, and rectangles are top-left plus width/height.

vec2 : F32, F32 -> Vec2

zero : Vec2

rect : F32, F32, F32, F32 -> Rect

circle : Vec2, F32 -> Circle

clamp : F32, F32, F32 -> F32

clamp01 : F32 -> F32

lerp : F32, F32, F32 -> F32

sqrt : F32 -> F32

Square root for game-scale F32 values. Roc's pinned builtins do not expose sqrt yet, so keep this pure Roc.

add : Vec2, Vec2 -> Vec2

sub : Vec2, Vec2 -> Vec2

scale : Vec2, F32 -> Vec2

dot : Vec2, Vec2 -> F32

length_squared : Vec2 -> F32

length : Vec2 -> F32

distance_squared : Vec2, Vec2 -> F32

distance : Vec2, Vec2 -> F32

normalize : Vec2 -> Vec2

lerp_vec2 : Vec2, Vec2, F32 -> Vec2

left : Rect -> F32

right : Rect -> F32

top : Rect -> F32

bottom : Rect -> F32

center : Rect -> Vec2

closest_point : Rect, Vec2 -> Vec2

contains : Rect, Vec2 -> Bool

circle_contains : Circle, Vec2 -> Bool

overlaps : Rect, Rect -> Bool

circle_overlaps : Circle, Circle -> Bool

circle_rect : Circle, Rect -> Bool

Vec2 : {
    x : F32,
    y : F32,
}

Rect : {
    x : F32,
    y : F32,
    width : F32,
    height : F32,
}

Circle : {
    center : Vec2,
    radius : F32,
}