NSVG_PI
nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle
da -= 2 * NSVG_PI;
da += 2 * NSVG_PI;
ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);