1
2#pragma once
3
4#include "Shape.h"
5
6#define MSDFGEN_EDGE_LENGTH_PRECISION 4
7
8namespace msdfgen {
9
10/** Assigns colors to edges of the shape in accordance to the multi-channel distance field technique.
11 * May split some edges if necessary.
12 * angleThreshold specifies the maximum angle (in radians) to be considered a corner, for example 3 (~172 degrees).
13 * Values below 1/2 PI will be treated as the external angle.
14 */
15void edgeColoringSimple(Shape &shape, double angleThreshold, unsigned long long seed = 0);
16
17/** The alternative "ink trap" coloring strategy is designed for better results with typefaces
18 * that use ink traps as a design feature. It guarantees that even if all edges that are shorter than
19 * both their neighboring edges are removed, the coloring remains consistent with the established rules.
20 */
21void edgeColoringInkTrap(Shape &shape, double angleThreshold, unsigned long long seed = 0);
22
23/** The alternative coloring by distance tries to use different colors for edges that are close together.
24 * This should theoretically be the best strategy on average. However, since it needs to compute the distance
25 * between all pairs of edges, and perform a graph optimization task, it is much slower than the rest.
26 */
27void edgeColoringByDistance(Shape &shape, double angleThreshold, unsigned long long seed = 0);
28
29}
30