public static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts)
{
var i = 0;
var orig = stackalloc float[2];
var ray = stackalloc float[] { 1, 0 };
float y_frac = 0;
var winding = 0;
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[0] = x;
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))
{
var 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;
var ax = x0 < (x1 < x2 ? x1 : x2) ? x0 : x1 < x2 ? x1 : x2;
var ay = y0 < (y1 < y2 ? y1 : y2) ? y0 : y1 < y2 ? y1 : y2;
var by = y0 < (y1 < y2 ? y2 : y1) ? y1 < y2 ? y2 : y1 : y0;
if (y > ay && y < by && x > ax)
{
var q0 = stackalloc float[2];
var q1 = stackalloc float[2];
var q2 = stackalloc float[2];
var hitsArray = new UnsafeArray2D <float>(2, 2);
var hits = (float **)hitsArray;
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))
{
var x_inter = (y - y0) / (y1 - y0) * (x1 - x0) + x0;
if (x_inter < x)
{
winding += y0 < y1 ? 1 : -1;
}
}
}
else
{
var num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits);
if (num_hits >= 1)
{
if (hits[0][0] < 0)
{
winding += hits[0][1] < 0 ? -1 : 1;
}
}
if (num_hits >= 2)
{
if (hits[1][0] < 0)
{
winding += hits[1][1] < 0 ? -1 : 1;
}
}
}
}
}
}
return(winding);
}
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] = (float)(1);
ray[1] = (float)(0);
float y_frac = 0;
int winding = (int)(0);
orig[0] = (float)(x);
orig[1] = (float)(y);
y_frac = ((float)(CRuntime.fmod((double)(y), (double)(1.0f))));
if ((y_frac) < (0.01f))
{
y += (float)(0.01f);
}
else if ((y_frac) > (0.99f))
{
y -= (float)(0.01f);
}
orig[1] = (float)(y);
for (i = (int)(0); (i) < (nverts); ++i)
{
if ((verts[i].type) == (STBTT_vline))
{
int x0 = (int)(verts[i - 1].x);
int y0 = (int)(verts[i - 1].y);
int x1 = (int)(verts[i].x);
int y1 = (int)(verts[i].y);
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (float)((y - y0) / (y1 - y0) * (x1 - x0) + x0);
if ((x_inter) < (x))
{
winding += (int)(((y0) < (y1)) ? 1 : -1);
}
}
}
if ((verts[i].type) == (STBTT_vcurve))
{
int x0 = (int)(verts[i - 1].x);
int y0 = (int)(verts[i - 1].y);
int x1 = (int)(verts[i].cx);
int y1 = (int)(verts[i].cy);
int x2 = (int)(verts[i].x);
int y2 = (int)(verts[i].y);
int ax = (int)((x0) < ((x1) < (x2) ? (x1) : (x2)) ? (x0) : ((x1) < (x2) ? (x1) : (x2)));
int ay = (int)((y0) < ((y1) < (y2) ? (y1) : (y2)) ? (y0) : ((y1) < (y2) ? (y1) : (y2)));
int by = (int)((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] = ((float)(x0));
q0[1] = ((float)(y0));
q1[0] = ((float)(x1));
q1[1] = ((float)(y1));
q2[0] = ((float)(x2));
q2[1] = ((float)(y2));
if (((equal(q0, q1)) != 0) || ((equal(q1, q2)) != 0))
{
x0 = ((int)(verts[i - 1].x));
y0 = ((int)(verts[i - 1].y));
x1 = ((int)(verts[i].x));
y1 = ((int)(verts[i].y));
if ((((y) > ((y0) < (y1) ? (y0) : (y1))) && ((y) < ((y0) < (y1) ? (y1) : (y0)))) && ((x) > ((x0) < (x1) ? (x0) : (x1))))
{
float x_inter = (float)((y - y0) / (y1 - y0) * (x1 - x0) + x0);
if ((x_inter) < (x))
{
winding += (int)(((y0) < (y1)) ? 1 : -1);
}
}
}
else
{
int num_hits = (int)(stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits));
if ((num_hits) >= (1))
{
if ((hits[0]) < (0))
{
winding += (int)((hits[1]) < (0) ? -1 : 1);
}
}
if ((num_hits) >= (2))
{
if ((hits[2]) < (0))
{
winding += (int)((hits[3]) < (0) ? -1 : 1);
}
}
}
}
}
}
return((int)(winding));
}
