40     Point diff = {pt2.x - pt1.x, pt2.y - pt1.y};  in _lineLengthApprox()
42     if (diff.y < 0) diff.y = -diff.y;  in _lineLengthApprox()
43     return (diff.x > diff.y) ? (diff.x + diff.y * 0.375f) : (diff.y + diff.x * 0.375f);  in _lineLengthApprox()
49     Point diff = {pt2.x - pt1.x, pt2.y - pt1.y};  in _lineLength()
50     return sqrtf(diff.x * diff.x + diff.y * diff.y);  in _lineLength()
107 float atan2(float y, float x)  in atan2()  argument
109     if (y == 0.0f && x == 0.0f) return 0.0f;  in atan2()
110     auto a = std::min(fabsf(x), fabsf(y)) / std::max(fabsf(x), fabsf(y));  in atan2()
113     if (fabsf(y) > fabsf(x)) r = 1.57079637f - r;  in atan2()
115     if (y < 0) return -r;  in atan2()
202     auto tx = pt.x * m.e11 + pt.y * m.e12 + m.e13;  in operator *=()
203     auto ty = pt.x * m.e21 + pt.y * m.e22 + m.e23;  in operator *=()
205     pt.y = ty;  in operator *=()
211     auto tx = pt.x * m.e11 + pt.y * m.e12 + m.e13;  in operator *()
212     auto ty = pt.x * m.e21 + pt.y * m.e22 + m.e23;  in operator *()
224     return {-unitDir.y, unitDir.x};  in normal()
238     auto dy = ((pt2.y - pt1.y) / len) * at;  in split()
241     left.pt2.y = left.pt1.y + dy;  in split()
258     c = (ctrl1.y + ctrl2.y) * 0.5f;  in split()
259     left.ctrl1.y = (start.y + ctrl1.y) * 0.5f;  in split()
260     right.ctrl2.y = (ctrl2.y + end.y) * 0.5f;  in split()
261     left.start.y = start.y;  in split()
262     right.end.y = end.y;  in split()
263     left.ctrl2.y = (left.ctrl1.y + c) * 0.5f;  in split()
264     right.ctrl1.y = (right.ctrl2.y + c) * 0.5f;  in split()
265     left.end.y = right.start.y = (left.ctrl2.y + right.ctrl1.y) * 0.5f;  in split()
294     left.ctrl1.y = start.y + t * (ctrl1.y - start.y);  in split()
297     left.ctrl2.y = ctrl1.y + t * (ctrl2.y - ctrl1.y); //temporary holding spot  in split()
300     ctrl2.y = ctrl2.y + t * (end.y - ctrl2.y);  in split()
303     ctrl1.y = left.ctrl2.y + t * (ctrl2.y - left.ctrl2.y);  in split()
306     left.ctrl2.y = left.ctrl1.y + t * (left.ctrl2.y - left.ctrl1.y);  in split()
309     left.end.y = start.y = left.ctrl2.y + t * (ctrl1.y - left.ctrl2.y);  in split()
337     float ay = start.y * it + ctrl1.y * t;  in at()
338     float by = ctrl1.y * it + ctrl2.y * t;  in at()
339     float cy = ctrl2.y * it + end.y * t;  in at()
342     cur.y = ay * it + by * t;  in at()
361 …rt.x + b * ctrl1.x + c * ctrl2.x + d * end.x, a * start.y + b * ctrl1.y + c * ctrl2.y + d * end.y};  in angle()
363     pt.y *= 3;  in angle()
365     return rad2deg(tvg::atan2(pt.y, pt.x));  in angle()