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#include "fracture.h"
int edge_to_verts(unsigned int width, bool periodic, unsigned int edge,
bool index) {
assert(edge < pow(width, 2));
int x = edge / width + 1;
int y = edge % width + 1;
if (periodic) {
return (((index ^ (x % 2)) + 2 * ((y + (index ^ (!(x % 2)))) / 2) - 1) %
width +
(x - index) * width) /
2;
} else {
return ((index ^ (x % 2)) + 2 * ((y + (index ^ (!(x % 2)))) / 2) +
(x - index) * (width + 1) - 1) /
2;
}
}
int dual_edge_to_verts(unsigned int width, bool periodic, unsigned int edge,
bool index) {
assert(edge < pow(width, 2));
int x = edge / width + 1;
int y = edge % width + 1;
if (periodic) {
return (((index ^ (!(x % 2))) + 2 * ((y + (index ^ (x % 2))) / 2) - 1) %
width +
(x - index) * width) /
2;
} else {
return ((index ^ (!(x % 2))) + 2 * ((y + (index ^ (x % 2))) / 2) +
(x - index) * (width + 1) - 1) /
2;
}
}
double dual_vert_to_coord(unsigned int width, bool periodic, unsigned int vert,
bool index) {
if (periodic) {
if (index)
return (2 * vert) % width + (2 * vert / width) % 2;
else
return 2 * vert / width;
} else {
if (index)
return (2 * vert) % (width + 1);
else
return (2 * vert) / (width + 1);
}
}
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