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);
}
