/// <summary>
/// Test if the angle between next edge and current edge is less or equal to 180 degrees.
/// </summary>
/// <param name="currentEdge">Current Edge</param>
/// <param name="nextEdge">Next Edge</param>
/// <param name="cw">Direction is clockwise?</param>
/// <returns></returns>
private int TestInnerSide(Edge currentEdge, Edge nextEdge, bool cw)
{
PlaneMath plane = new PlaneMath(currentEdge.Left, currentEdge.Normal);
float pointSide = plane.PointSide(cw ? nextEdge.Right : nextEdge.Left);
if (pointSide < -.000001f) // less than zero with a threshold, inner side
{
return(1);
}
if (pointSide < .000001f) // < 180 degree angle, needs to be melted
{
return(0);
}
return(-1);
}
private void SplitTriangle(int offset)
{
int i0 = offset % 3;
int i1 = (1 + offset) % 3;
int i2 = (2 + offset) % 3;
int indexHit0 = _mesh.AddLerpVertex(triIndicies[i0], triIndicies[i1], lineLerp[i0]);
int indexHit1 = _mesh.AddLerpVertex(triIndicies[i1], triIndicies[i2], lineLerp[i1]);
AddCapIndex(indexHit0);
AddCapIndex(indexHit1);
smallTri[0] = indexHit0;
smallTri[1] = triIndicies[i1];
smallTri[2] = indexHit1;
bigTri[0] = triIndicies[i0];
bigTri[1] = indexHit0;
bigTri[2] = indexHit1;
bigTri[3] = triIndicies[i0];
bigTri[4] = indexHit1;
bigTri[5] = triIndicies[i2];
if (_splitPlane.PointSide(_mesh.wsVerts[triIndicies[i1]]) > 0f)
{
_mesh.trisUp.Add(smallTri[0]);
_mesh.trisUp.Add(smallTri[1]);
_mesh.trisUp.Add(smallTri[2]);
_mesh.trisDown.Add(bigTri[0]);
_mesh.trisDown.Add(bigTri[1]);
_mesh.trisDown.Add(bigTri[2]);
_mesh.trisDown.Add(bigTri[3]);
_mesh.trisDown.Add(bigTri[4]);
_mesh.trisDown.Add(bigTri[5]);
#if UNITY_EDITOR
if (ShowDebug)
{
DrawDebugTri(smallTri, Color.cyan);
DrawDebugTriDouble(bigTri, Color.magenta);
}
#endif
}
else
{
_mesh.trisDown.Add(smallTri[0]);
_mesh.trisDown.Add(smallTri[1]);
_mesh.trisDown.Add(smallTri[2]);
_mesh.trisUp.Add(bigTri[0]);
_mesh.trisUp.Add(bigTri[1]);
_mesh.trisUp.Add(bigTri[2]);
_mesh.trisUp.Add(bigTri[3]);
_mesh.trisUp.Add(bigTri[4]);
_mesh.trisUp.Add(bigTri[5]);
#if UNITY_EDITOR
if (ShowDebug)
{
DrawDebugTri(smallTri, Color.magenta);
DrawDebugTriDouble(bigTri, Color.cyan);
}
#endif
}
}