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stub in wasm poly diff

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This commit is contained in:
Stewart Allen 2021-06-22 17:16:01 -04:00
commit 5d6d68e2aa
4 changed files with 100 additions and 5 deletions
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71
wasm/kiri-geo.cpp
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@ -94,7 +94,7 @@ Uint32 poly_offset(Uint32 memat, Uint32 polys, float offset) {
}
__attribute__ ((export_name("poly_union")))
Uint32 poly_union(Uint32 memat, Uint32 polys) {
Uint32 poly_union(Uint32 memat, Uint32 polys, float offset) {
using namespace ClipperLib;
@ -116,9 +116,72 @@ Uint32 poly_union(Uint32 memat, Uint32 polys) {
}
Clipper clip;
clip.AddPath(ins[0], ptSubject, true);
clip.AddPath(ins[1], ptClip, true);
clip.Execute(ctUnion, outs, pftEvenOdd, pftEvenOdd);
clip.AddPaths(ins, ptSubject, true);
clip.Execute(ctUnion, outs);
Uint32 resat = pos;
for (Path po : outs) {
struct length16 *ls = (struct length16 *)(mem + pos);
ls->length = po.size();
pos += 2;
for (IntPoint pt : po) {
struct point32 *ip = (struct point32 *)(mem + pos);
ip->x = (int)pt.X;
ip->y = (int)pt.Y;
pos += 8;
}
}
// null terminate
struct length16 *ls = (struct length16 *)(mem + pos);
ls->length = 0;
clip.Clear();
return resat;
}
__attribute__ ((export_name("poly_diff")))
Uint32 poly_diff(Uint32 memat, Uint32 polysA, Uint32 polysB, float offset) {
using namespace ClipperLib;
Paths inA(polysA);
Paths inB(polysB);
Paths outs;
Uint32 pos = memat;
for (Uint32 poly = 0; poly < polysA; poly++ ) {
struct length16 *ls = (struct length16 *)(mem + pos);
Uint16 points = ls->length;
pos += 2;
while (points-- > 0) {
struct point32 *ip = (struct point32 *)(mem + pos);
pos += 8;
inA[poly] << IntPoint(ip->x, ip->y);
}
poly++;
}
for (Uint32 poly = 0; poly < polysB; poly++ ) {
struct length16 *ls = (struct length16 *)(mem + pos);
Uint16 points = ls->length;
pos += 2;
while (points-- > 0) {
struct point32 *ip = (struct point32 *)(mem + pos);
pos += 8;
inB[poly] << IntPoint(ip->x, ip->y);
}
poly++;
}
Clipper clip;
clip.AddPaths(inA, ptSubject, true);
clip.AddPaths(inB, ptClip, true);
clip.Execute(ctDifference, outs, pftEvenOdd, pftEvenOdd);
Uint32 resat = pos;