static void
qtcCreateShadowGradient(float *buff, size_t size)
{
const float r = size / 6.5;
for (size_t i = 0; i < size; i++) {
buff[i] = qtcMax(0, expf(-(i / r)) - 0.0015);
}
}
static inline float
_qtcDistance(int x, int y, int x0, int y0, bool square)
{
int dx = x - x0;
int dy = y - y0;
if (dx == 0) {
return qtcAbs(dy);
}
if (dy == 0) {
return qtcAbs(dx);
}
return square ? qtcMax(qtcAbs(dx), qtcAbs(dy)) : sqrtf(dx * dx + dy * dy);
}
