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14a9b3751e
MozReview-Commit-ID: JJK2le2vpeN --HG-- extra : rebase_source : 677e4433eddb14fea5e0d9a978f28b57912d21f8
49 lines
1.3 KiB
GLSL
49 lines
1.3 KiB
GLSL
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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struct RectWithSize {
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vec2 p0;
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vec2 size;
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};
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struct RectWithEndpoint {
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vec2 p0;
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vec2 p1;
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};
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RectWithEndpoint to_rect_with_endpoint(RectWithSize rect) {
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RectWithEndpoint result;
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result.p0 = rect.p0;
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result.p1 = rect.p0 + rect.size;
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return result;
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}
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RectWithSize to_rect_with_size(RectWithEndpoint rect) {
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RectWithSize result;
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result.p0 = rect.p0;
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result.size = rect.p1 - rect.p0;
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return result;
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}
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RectWithSize transform_rect(RectWithSize rect, mat2 transform) {
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vec2 center = transform * (rect.p0 + rect.size * 0.5);
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vec2 radius = mat2(abs(transform[0]), abs(transform[1])) * (rect.size * 0.5);
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return RectWithSize(center - radius, radius * 2.0);
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}
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RectWithSize intersect_rects(RectWithSize a, RectWithSize b) {
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RectWithSize result;
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result.p0 = max(a.p0, b.p0);
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result.size = min(a.p0 + a.size, b.p0 + b.size) - result.p0;
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return result;
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}
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bool rect_inside_rect(RectWithSize little, RectWithSize big) {
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return all(lessThanEqual(vec4(big.p0, little.p0 + little.size),
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vec4(little.p0, big.p0 + big.size)));
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}
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