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add multi-colored paths within the same geometry

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This commit is contained in:
Stewart Allen 2020-11-09 00:00:57 -05:00
commit 50c51084a6
9 changed files with 84 additions and 37 deletions
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20
src/kiri/render.js
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@ -161,7 +161,8 @@
contour.push(new THREE.Vector2(p.x, p.y));
});
const {index, faces} = ProfiledContourGeometry(profile, contour, poly.isClosed());
const one = this.current.paths[0];
const cur = this.current;
const one = cur.paths[0];
if (one) {
// merge all contour geometry for massive speed gain
const add = one.faces.length / 3;
@ -169,12 +170,27 @@
index[i] += add;
}
const feces = new Float32Array(one.faces.length + faces.length);
const indln = one.index.length;
feces.set(one.faces);
feces.set(faces, one.faces.length);
one.faces = feces;
one.index.appendAll(index);
// allow changing colors
if (opts.color) {
if (!cur.cpath) {
// seed
cur.cpath = [ Object.assign({ start: 0, count: indln - 1 }, cur.color) ];
} else {
// rewrite last color count if color or opacity have changed
const pc = cur.cpath[cur.cpath.length - 1];
if (pc.face !== opts.color.face || pc.opacity !== opts.color.opacity) {
pc.count = indln - 1;
cur.cpath.push(Object.assign({ start: indln, count: Infinity }, opts.color));
}
}
}
} else {
this.current.paths.push({ index, faces, z: poly.getZ() });
cur.paths.push({ index, faces, z: poly.getZ() });
}
this.stats.contour++;
});