47 float atan2(float y, float x);
126 static inline void scaleR(Matrix* m, float x, float y)  in scaleR()  argument
132     if (y != 1.0f) {  in scaleR()
133         m->e22 *= y;  in scaleR()
134         m->e12 *= y;  in scaleR()
139 static inline void translate(Matrix* m, float x, float y)  in translate()  argument
142     m->e23 += y;  in translate()
146 static inline void translateR(Matrix* m, float x, float y)  in translateR()  argument
148     if (x == 0.0f && y == 0.0f) return;  in translateR()
149     m->e13 += (x * m->e11 + y * m->e12);  in translateR()
150     m->e23 += (x * m->e21 + y * m->e22);  in translateR()
182     return lhs.x * rhs.y - rhs.x * lhs.y;  in cross()
188     return tvg::zero(p.x) && tvg::zero(p.y);  in zero()
195     auto y = b->y - a->y;  in length()  local
198     if (y < 0) y = -y;  in length()
200     return (x > y) ? (x + 0.375f * y) : (y + 0.375f * x);  in length()
206     return sqrtf(a.x * a.x + a.y * a.y);  in length()
212     return tvg::equal(lhs.x, rhs.x) && tvg::equal(lhs.y, rhs.y);
224     return {lhs.x - rhs.x, lhs.y - rhs.y};
230     return {lhs.x + rhs.x, lhs.y + rhs.y};
236     return {lhs.x * rhs, lhs.y * rhs};
242     return {lhs * rhs.x, lhs * rhs.y};
248     return {lhs.x / rhs, lhs.y / rhs};
254     TVGLOG("COMMON", "Point: [%f %f]", pt.x, pt.y);  in log()