diff options
author | Matthew Kosarek <mattkae@protonmail.com> | 2021-05-16 19:50:15 -0400 |
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committer | Matthew Kosarek <mattkae@protonmail.com> | 2021-05-16 19:50:15 -0400 |
commit | a00c0aab1eb5a7a55bef8ca08115bdd722ab5699 (patch) | |
tree | 45b5c4cc8c380d0630a8e0185af7229f26dc754a /frontend/_shared/math/vec2.js | |
parent | 4941a1874b6ca9d142d94df70b2aec5e0b35b94e (diff) |
Moved the frontend directory up so that it no longer exists
Diffstat (limited to 'frontend/_shared/math/vec2.js')
-rw-r--r-- | frontend/_shared/math/vec2.js | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/frontend/_shared/math/vec2.js b/frontend/_shared/math/vec2.js deleted file mode 100644 index 11e71cd..0000000 --- a/frontend/_shared/math/vec2.js +++ /dev/null @@ -1,64 +0,0 @@ -function vec2(x = 0, y = 0) { - return { x: x, y: y}; -} - -function addVec2(v1, v2) { - return { - x: v1.x + v2.x, - y: v1.y + v2.y - }; -} - -function subVec2(v1, v2) { - return { - x: v1.x - v2.x, - y: v1.y - v2.y - }; -} - -function scaleVec2(v, s) { - return { - x: v.x * s, - y: v.y * s - }; -} - -function dot2(v1, v2) { - return v1.x * v2.x + v1.y * v2.y; -} - -function length2(v) { - return Math.sqrt(v.x * v.x + v.y * v.y); -} - -function normalize2(v) { - const lLength = length2(v); - const lInverseLength = lLength === 0 ? 1.0 : 1.0 / length2(v); - return { x: v.x * lInverseLength, y: v.y * lInverseLength }; -} - -function vec2str(v) { - return `(${v.x.toFixed(2)}, ${v.y.toFixed(2)})`; -} - -function getPerp2(v) { - return { - x: -v.y, - y: v.x - }; -} - -function negate2(v) { - return { - x: -v.x, - y: -v.y - }; -} - -// Algorithm plucked from: https://matthew-brett.github.io/teaching/rotation_2d.html -function rotateAboutOrigin2(v, angle) { - return { - x: v.x * Math.cos(angle) - v.y * Math.sin(angle), - y: v.x * Math.sin(angle) + v.y * Math.cos(angle), - }; -}
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