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adds level 0 subdivision #18

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adds level 0 subdivision #18

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23 changes: 21 additions & 2 deletions che/cheL0.js
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Original file line number Diff line number Diff line change
Expand Up @@ -25,10 +25,12 @@ export default class CheL0 {
this._triangleCount = tableV.length / 3;

//Coordinates of each vertex of the mesh
this._tableGeometry = tableG;
this._tableGeometry = []
this._tableGeometry.push(...tableG);

//Indices of the triangles in the mesh
this._tableVertices = tableV;
this._tableVertices = []
this._tableVertices.push(...tableV)
this.computeNormals();
}

Expand Down Expand Up @@ -110,6 +112,23 @@ export default class CheL0 {
return 3 * this.triangle(heId) + (heId + 2) % 3;
}

subdivide(triangleId){
if (!this.isValidTriangle(triangleId)){
throw new Error("Invalid triangle for subdivision")
}
let center = this.getTriangleCenter(triangleId)
let id = this._vertexCount
this._tableGeometry.push(center)
this._vertexCount+=1
let halfEdges = this._tableVertices.slice(3*triangleId, 3*triangleId+3)
this._tableVertices[3*triangleId] = id
for (let i = 1; i< 3; i++){
let copy = Array.from(halfEdges)
copy[i] = id
this._tableVertices.push(...copy)
}
this._triangleCount+=2
}

relation00(vertexId) {
if (!this.isValidVertex(vertexId)) {
Expand Down
8 changes: 8 additions & 0 deletions tests/che.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,14 @@ test('L0: Check if vertexCount equals to geometry table size', () => {
expect(che_base.level0.testGeometryTable()).toBe(true);
})



test('L0: Check if subdivsion works', () => {
che_base.level0.subdivide(3)
expect(che_base.level0.testVertexTable()).toBe(true);
})


test('L0: Check if triangleCount * 3 equals to vertex table size', () => {
expect(che_base.level0.testVertexTable()).toBe(true);
})
Expand Down