private Vector3 evalVertex(CPNSideEdge sidedEdgeA, CPNSideEdge sidedEdgeB, float U, float V) { //int backBIndex = bufferPrev.N - Bindex; evaluator.EvalAt(0, sidedEdgeA); Vector3 v0 = evaluator.EvalVertex(sidedEdgeA); Vector3 dA0 = evaluator.EvalDev(sidedEdgeA); evaluator.EvalAt(U, sidedEdgeA); Vector3 vA = evaluator.EvalVertex(sidedEdgeA); Vector3 nA = evaluator.EvalNormal(sidedEdgeA); evaluator.EvalAt(1 - V, sidedEdgeB); Vector3 vB = evaluator.EvalVertex(sidedEdgeB); Vector3 nB = evaluator.EvalNormal(sidedEdgeB); evaluator.EvalAt(1, sidedEdgeB); Vector3 dB0 = -evaluator.EvalDev(sidedEdgeB); float kA = -Vector3.Dot(dB0, nA); Vector3 part1 = vA + /*sidedEdgeA.guide[0].thickness **/ ((vB - v0) + kA * V * nA); float kB = -Vector3.Dot(dA0, nB); Vector3 part2 = vB + /*sidedEdgeB.guide[0].thickness * */ ((vA - v0) + kB * U * nB); float U2 = U * U; float V2 = V * V; return((part1 * U2 + part2 * V2) / (U2 + V2)); }
public void writeWithGuideBack(CPNSideEdge guide, int N, float step, OutputMesh mesh, CPNGuideEvaluator evaluator) { this.step = step; requestSize(N + 1); //We should have only one thickness on multisided edge, you know? this.thickness = 1; for (int i = 0; i <= N; i++) { //This is the eval-back evaluator.EvalAt(1.0f - i * step, guide); Vector3 dev = evaluator.EvalDev(guide); vertices[i] = evaluator.EvalVertex(guide); if (i == 0) { devFirst = dev; } if (i == N) { devLast = dev; } evaluator.EvalAt(i * step + DELTA, guide); verticesDplus[i] = evaluator.EvalVertex(guide); evaluator.EvalAt(i * step - DELTA, guide); verticesDminus[i] = evaluator.EvalVertex(guide); normals[i] = evaluator.EvalNormal(guide, dev).normalized; uvs[i] = evaluator.EvalUV(guide); for (int k = 0; k < countP; k++) { properties[k][i] = evaluator.EvalProperty(guide, k); } } }
public Vector3 evalVertex(int sIndex, CPNSideEdge sidedEdge, float t) { int backSIndex = prev.N - sIndex; evaluator.EvalAt(t, sidedEdge); Vector3 A = evaluator.EvalVertex(sidedEdge); Vector3 B = prev.vertices[backSIndex]; Vector3 C = next.vertices[sIndex]; Vector3 A0 = buffer.vertices[0]; Vector3 AN = buffer.vertices[buffer.N]; float sB = 1 - prev.ts[backSIndex]; float sC = prev.ts[sIndex]; float s = (1 - t) * sB + t * sC; float size = (1 - s) * (1 - s) * (1 - s) /* * s0[==1] */ + (s1 * (1 - s) * (1 - s) + s2 * s * (1 - s) + s3 * s * s) * s; if (!CPNCornerSet.applySecondOrderControl) { size = 1; } Vector3 firstOrder = GetFirstOrder(t); Vector3 At = (1 - t) * A0 + t * AN; //Vector3 PA = A - At; Vector3 PA = (A - At) * size; Vector3 PBC = (1 - t) * B + t * C; //if (CPNCornerSet.applySecondOrderControl) //{ return(PA + PBC + firstOrder * (1 - s) * (1 - s) * s /** (1 - s * s)+ * ((1 - t) * B + t * C ) * (s * s)*/); //} //else //{ // return PA+PBC; //} }
private float approximateGuideSize(CPNGuide guide) { CPNGuideEvaluator evaluator = new CPNGuideEvaluator(); int STEPS = 8; float step = 1.0f / STEPS; Vector3 preV = guide.vBuffer[0]; float distance = 0; for (int i = 1; i <= STEPS; i++) { evaluator.EvalAt(i * step, guide); Vector3 V = evaluator.EvalVertex(guide); distance += Vector3.Distance(V, preV); preV = V; } if (distance == 0) { distance = 0.001f; } return(distance); }