1/* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5struct RectWithSize { 6 vec2 p0; 7 vec2 size; 8}; 9 10struct RectWithEndpoint { 11 vec2 p0; 12 vec2 p1; 13}; 14 15float point_inside_rect(vec2 p, vec2 p0, vec2 p1) { 16 vec2 s = step(p0, p) - step(p1, p); 17 return s.x * s.y; 18} 19 20float signed_distance_rect(vec2 pos, vec2 p0, vec2 p1) { 21 vec2 d = max(p0 - pos, pos - p1); 22 // Instead of using a true signed distance to rect here, we just use the 23 // simpler approximation of the maximum distance on either axis from the 24 // outside of the rectangle. This avoids expensive use of length() and only 25 // causes mostly imperceptible differences at corner pixels. 26 return max(d.x, d.y); 27} 28 29vec2 rect_clamp(RectWithEndpoint rect, vec2 pt) { 30 return clamp(pt, rect.p0, rect.p1); 31} 32 33vec2 rect_size(RectWithEndpoint rect) { 34 return rect.p1 - rect.p0; 35}