private void ComputePointCurve(Coordinate pt, OffsetSegmentGenerator segGen)
{
switch (_bufParams.EndCapStyle)
{
case EndCapStyle.Round:
segGen.CreateCircle(pt);
break;
case EndCapStyle.Square:
segGen.CreateSquare(pt);
break;
// otherwise curve is empty (e.g. for a butt cap);
}
}
/*
* private void OLDcomputeLineBufferCurve(Coordinate[] inputPts)
* {
* int n = inputPts.length - 1;
*
* // compute points for left side of line
* initSideSegments(inputPts[0], inputPts[1], Position.LEFT);
* for (int i = 2; i <= n; i++) {
* addNextSegment(inputPts[i], true);
* }
* addLastSegment();
* // add line cap for end of line
* addLineEndCap(inputPts[n - 1], inputPts[n]);
*
* // compute points for right side of line
* initSideSegments(inputPts[n], inputPts[n - 1], Position.LEFT);
* for (int i = n - 2; i >= 0; i--) {
* addNextSegment(inputPts[i], true);
* }
* addLastSegment();
* // add line cap for start of line
* addLineEndCap(inputPts[1], inputPts[0]);
*
* vertexList.closeRing();
* }
*/
private void ComputeSingleSidedBufferCurve(Coordinate[] inputPts, bool isRightSide,
OffsetSegmentGenerator segGen)
{
double distTol = SimplifyTolerance(_distance);
if (isRightSide)
{
// add original line
segGen.AddSegments(inputPts, true);
//---------- compute points for right side of line
// Simplify the appropriate side of the line before generating
var simp2 = BufferInputLineSimplifier.Simplify(inputPts, -distTol);
// MD - used for testing only (to eliminate simplification)
// Coordinate[] simp2 = inputPts;
int n2 = simp2.Length - 1;
// since we are traversing line in opposite order, offset position is still LEFT
segGen.InitSideSegments(simp2[n2], simp2[n2 - 1], Positions.Left);
segGen.AddFirstSegment();
for (int i = n2 - 2; i >= 0; i--)
{
segGen.AddNextSegment(simp2[i], true);
}
}
else
{
// add original line
segGen.AddSegments(inputPts, false);
//--------- compute points for left side of line
// Simplify the appropriate side of the line before generating
var simp1 = BufferInputLineSimplifier.Simplify(inputPts, distTol);
// MD - used for testing only (to eliminate simplification)
// Coordinate[] simp1 = inputPts;
int n1 = simp1.Length - 1;
segGen.InitSideSegments(simp1[0], simp1[1], Positions.Left);
segGen.AddFirstSegment();
for (int i = 2; i <= n1; i++)
{
segGen.AddNextSegment(simp1[i], true);
}
}
segGen.AddLastSegment();
segGen.CloseRing();
}
private void ComputeRingBufferCurve(Coordinate[] inputPts, Positions side, OffsetSegmentGenerator segGen)
{
// simplify input line to improve performance
double distTol = SimplifyTolerance(_distance);
// ensure that correct side is simplified
if (side == Positions.Right)
{
distTol = -distTol;
}
var simp = BufferInputLineSimplifier.Simplify(inputPts, distTol);
// MD - used for testing only (to eliminate simplification)
// Coordinate[] simp = inputPts;
int n = simp.Length - 1;
segGen.InitSideSegments(simp[n - 1], simp[0], side);
for (int i = 1; i <= n; i++)
{
bool addStartPoint = i != 1;
segGen.AddNextSegment(simp[i], addStartPoint);
}
segGen.CloseRing();
}
