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fix face orientation of flipped shapes

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This commit is contained in:
casperlamboo 2017-12-12 10:03:40 +01:00
parent 17bb6ac722
commit 247272d8e6
1 changed files with 24 additions and 25 deletions
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39
src/d3/ShapeMesh.js vendored
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@ -37,6 +37,7 @@ class ShapeMesh extends THREE.Object3D {
this._holeMesh.name = shapeData.UID;
this._holeMesh.isShapeMesh = true;
this._reverse = shapeData.transform.sx > 0 !== shapeData.transform.sy > 0;
this._sculpt = sculpt;
this._rotate = rotate;
this._twist = twist;
@ -49,12 +50,6 @@ class ShapeMesh extends THREE.Object3D {
this.updatePoints(shapeData);
}
_isReverse() {
const sx = this._transform.sx > 0;
const sy = this._transform.sy > 0;
return sx !== sy;
}
add(object) {
if (!this.children.includes(object)) super.add(object);
}
@ -194,6 +189,12 @@ class ShapeMesh extends THREE.Object3D {
throw new Error(`Cannot update object ${this.name}: transform contains invalid values.`);
}
const reverse = this._transform.sx > 0 !== this._transform.sy > 0;
if (reverse !== this._reverse) {
this._reverse = reverse;
this._updateFaces();
}
this._transform = transform;
this._z = z;
this._updateVertices();
@ -258,7 +259,6 @@ class ShapeMesh extends THREE.Object3D {
_updateVerticesHorizontal(heightStep, paths, center, indexCounter) {
for (let pathindex = 0; pathindex < paths.length; pathindex ++) {
const path = applyMatrixOnPath(paths[pathindex], this._transform);
if (this._isReverse()) path.reverse();
for (let pathIndex = 0; pathIndex < path.length; pathIndex ++) {
let point = path[pathIndex];
@ -291,7 +291,6 @@ class ShapeMesh extends THREE.Object3D {
for (let pathsIndex = 0; pathsIndex < paths.length; pathsIndex ++) {
const path = applyMatrixOnPath(paths[pathsIndex], this._transform);
if (this._isReverse()) path.reverse();
for (let pathIndex = 0; pathIndex < path.length; pathIndex ++) {
const point = path[pathIndex];
@ -405,11 +404,6 @@ class ShapeMesh extends THREE.Object3D {
})
.map(path => path.map(({ x, y }) => new THREE.Vector2(x, y)));
if (this._isReverse()) {
points.reverse();
holes.map(hole => hole.reverse());
}
// triangulate
const triangulatedTop = THREE.ShapeUtils.triangulateShape(points, holes)
.reduce((a, b) => a.concat(b), [])
@ -419,12 +413,7 @@ class ShapeMesh extends THREE.Object3D {
// reverse index order for bottom so faces are flipped
const triangulatedBottom = triangulatedTop
.map(value => value + numPoints)
if (this._isReverse()) {
triangulatedTop.reverse();
} else {
triangulatedBottom.reverse();
}
.reverse();
triangulatedIndexes.push(triangulatedBottom.concat(triangulatedTop));
@ -453,6 +442,7 @@ class ShapeMesh extends THREE.Object3D {
const { shape } = this._shapes[i];
if (this._fill) {
if (this._reverse) triangulatedIndexes[i].reverse();
for (let j = 0; j < triangulatedIndexes[i].length; j ++) {
indexes[indexCounter ++] = triangulatedIndexes[i][j];
}
@ -466,6 +456,15 @@ class ShapeMesh extends THREE.Object3D {
let base = (pointIndexOffset + pointIndex) * numHeightSteps + vertexOffsets[i];
for (let heightStep = 0; heightStep < (numHeightSteps - 1); heightStep ++) {
if (this._reverse) {
indexes[indexCounter ++] = base + 1;
indexes[indexCounter ++] = base + numHeightSteps;
indexes[indexCounter ++] = base;
indexes[indexCounter ++] = base + numHeightSteps + 1;
indexes[indexCounter ++] = base + numHeightSteps;
indexes[indexCounter ++] = base + 1;
} else {
indexes[indexCounter ++] = base;
indexes[indexCounter ++] = base + numHeightSteps;
indexes[indexCounter ++] = base + 1;
@ -473,7 +472,7 @@ class ShapeMesh extends THREE.Object3D {
indexes[indexCounter ++] = base + 1;
indexes[indexCounter ++] = base + numHeightSteps;
indexes[indexCounter ++] = base + numHeightSteps + 1;
}
base ++;
}
}