public static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts)
{
int i = 0;
float *orig = stackalloc float[2];
float *ray = stackalloc float[2];
ray[0] = 1;
ray[1] = 0;
float y_frac = 0;
int winding = 0;
orig[0] = x;
orig[1] = y;
y_frac = ((float)(CRuntime.Fmod(y, 1.0f)));
if ((y_frac) < (0.01f))
{
y += 0.01f;
}
else if ((y_frac) > (0.99f))
{
y -= 0.01f;
}
orig[1] = y;
for (i = 0; (i) < (nverts); ++i)
{
if ((verts[i].type) == (STBTT_vline))
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].x;
int y1 = verts[i].y;
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if ((x_inter) < (x))
{
winding += ((y0) < (y1)) ? 1 : -1;
}
}
}
if ((verts[i].type) == (STBTT_vcurve))
{
int x0 = verts[i - 1].x;
int y0 = verts[i - 1].y;
int x1 = verts[i].cx;
int y1 = verts[i].cy;
int x2 = verts[i].x;
int y2 = verts[i].y;
int ax = (x0) < ((x1) < (x2) ? (x1) : (x2)) ? (x0) : ((x1) < (x2) ? (x1) : (x2));
int ay = (y0) < ((y1) < (y2) ? (y1) : (y2)) ? (y0) : ((y1) < (y2) ? (y1) : (y2));
int by = (y0) < ((y1) < (y2) ? (y2) : (y1)) ? ((y1) < (y2) ? (y2) : (y1)) : (y0);
if ((((y) > (ay)) && ((y) < (by))) && ((x) > (ax)))
{
float *q0 = stackalloc float[2];
float *q1 = stackalloc float[2];
float *q2 = stackalloc float[2];
float *hits = stackalloc float[4];
q0[0] = x0;
q0[1] = y0;
q1[0] = x1;
q1[1] = y1;
q2[0] = x2;
q2[1] = y2;
if (((equal(q0, q1)) != 0) || ((equal(q1, q2)) != 0))
{
x0 = verts[i - 1].x;
y0 = verts[i - 1].y;
x1 = verts[i].x;
y1 = verts[i].y;
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if ((x_inter) < (x))
{
winding += ((y0) < (y1)) ? 1 : -1;
}
}
}
else
{
int num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits);
if ((num_hits) >= (1))
{
if ((hits[0]) < (0))
{
winding += (hits[1]) < (0) ? -1 : 1;
}
}
if ((num_hits) >= (2))
{
if ((hits[2]) < (0))
{
winding += (hits[3]) < (0) ? -1 : 1;
}
}
}
}
}
}
return(winding);
}
