mirror of https://git.sr.ht/~kikoodx/kble
63 lines
1.6 KiB
Zig
63 lines
1.6 KiB
Zig
// SPDX-License-Identifier: MIT
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// Copyright (c) 2021 KikooDX
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// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
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// MIT licensed. The MIT license requires this copyright notice to be
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// included in all copies and substantial portions of the software.
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//! This module provides functions for creating and manipulating 2D
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//! vectors with integer precision.
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const expect = @import("std").testing.expect;
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const Self = @This();
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pub const int_type = u16;
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x: int_type,
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y: int_type,
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/// Create a vector with `x` and `y` values.
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pub fn init(x: int_type, y: int_type) Self {
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return Self {
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.x = x,
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.y = y,
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};
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}
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/// Return the sum of `self` and `other`.
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pub fn add(self: Self, other: Self) Self {
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return Self {
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.x = self.x + other.x,
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.y = self.y + other.y,
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};
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}
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/// Return the difference between `self` and `other`.
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pub fn sub(self: Self, other: Self) Self {
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return Self {
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.x = self.x - other.x,
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.y = self.y - other.y,
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};
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}
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test "create Vector" {
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const vector = Self.init(14, 95);
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expect(vector.x == 14);
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expect(vector.y == 95);
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}
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test "add two Self using dot syntax" {
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const vector_1 = Self.init(23, 81);
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const vector_2 = Self.init(13, 12);
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const vector_sum = vector_1.add(vector_2);
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expect(vector_sum.x == 36);
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expect(vector_sum.y == 93);
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}
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test "calculate difference between two Self using dot syntax" {
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const vector_1 = Self.init(12, 98);
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const vector_2 = Self.init(4, 40);
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const vector_diff = vector_1.sub(vector_2);
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expect(vector_diff.x == 8);
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expect(vector_diff.y == 58);
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}
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