Minor example refactorings #3
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fwcd
reviewed
Aug 25, 2022
| /** Subtracts two 2D vectors. */ | ||
| export function sub(lhs: PartialVec2, rhs: PartialVec2): Vec2 { | ||
| return { x: (lhs.x ?? 0) - (rhs.x ?? 0), y: (lhs.y ?? 0) - (rhs.y ?? 0) }; | ||
| return add(lhs, scale(rhs, -1)); |
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Yeah we could do this, my idea was that subtraction is so fundamental that it ought to be as fast as possible, so I'd actually lean towards keeping it as is (though perhaps we'd want to default the parameters to { x = 0, y = 0 } to make it less verbose).
| /** Scales a 2D vector. */ | ||
| export function scale(lhs: PartialVec2, rhs: number): Vec2 { | ||
| return { x: (lhs.x ?? 0) * rhs, y: (lhs.y ?? 0) * rhs }; | ||
| export function scale({ x = 0, y = 0 }: PartialVec2, rhs: number): Vec2 { |
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If we default these parameters, the vector no longer needs to be a PartialVec2, right?
Suggested change
| export function scale({ x = 0, y = 0 }: PartialVec2, rhs: number): Vec2 { | |
| export function scale({ x = 0, y = 0 }: Vec2, rhs: number): Vec2 { |
Also it would be great if we could use this trick for add and sub too, for consistency.
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This PR aims to refactor some parts of the example code.
E.g., it introduces the usage of the
Partial<T>type, takes usage of restructuring and reduces code duplication.