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Optimize filled polygon #177

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Optimize filled polygon #177

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20 changes: 8 additions & 12 deletions src/hagl_polygon.c
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Original file line number Diff line number Diff line change
Expand Up @@ -115,19 +115,15 @@ void hagl_fill_polygon(
j = i;
}

/* Sort the nodes, via a simple “Bubble” sort. */
int16_t i = 0;
while (i < count - 1) {
if (nodes[i] > nodes[i + 1]) {
int16_t swap = nodes[i];
nodes[i] = nodes[i + 1];
nodes[i + 1] = swap;
if (i) {
i--;
}
} else {
i++;
/* Sort the nodes, via insertion sort. */
for (int16_t i = 1; i < count; i++) {
int16_t key = nodes[i];
int16_t j = i - 1;
while (j >= 0 && nodes[j] > key) {
nodes[j + 1] = nodes[j];
j--;
}
nodes[j + 1] = key;
}

/* Draw lines between nodes. */
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