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59 lines
1.1 KiB
GLSL
59 lines
1.1 KiB
GLSL
#ifndef _RECT_
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#define _RECT_
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struct Rect
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{
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/* x,y and y,w make up the 2 points of this rect,
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note that this is not containing width or height */
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vec4 bounds;
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};
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Rect
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rect_from_gsk (vec4 xywh)
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{
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return Rect(xywh.xyxy + vec4(0,0,xywh.zw));
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}
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float
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rect_distance (Rect r, vec2 p)
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{
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vec4 distance = (r.bounds - p.xyxy) * vec4(1.0, 1.0, -1.0, -1.0);
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vec2 max2 = max (distance.xy, distance.zw);
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return length (max (max2, 0)) + min (max(max2.x, max2.y), 0);
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}
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vec2
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rect_size (Rect r)
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{
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return r.bounds.zw - r.bounds.xy;
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}
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Rect
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rect_round_larger (Rect r)
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{
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return Rect (vec4 (floor(r.bounds.xy), ceil (r.bounds.zw)));
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}
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Rect
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rect_round_larger_smaller (Rect r)
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{
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return Rect (mix (floor(r.bounds), ceil (r.bounds), bvec4(0, 1, 1, 0)));
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}
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Rect
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rect_round_smaller_larger (Rect r)
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{
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return Rect (mix (floor(r.bounds), ceil (r.bounds), bvec4(1, 0, 0, 1)));
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}
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Rect
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rect_intersect (Rect a, Rect b)
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{
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vec4 result = vec4(max(a.bounds.xy, b.bounds.xy), min(a.bounds.zw, b.bounds.zw));
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if (any (greaterThanEqual (result.xy, result.zw)))
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return Rect (vec4(0.0));
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return Rect(result);
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}
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#endif
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