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SiboVG 2022-08-18 22:46:45 +02:00
parent 5df7f4f10d
commit a7a73e9949
1 changed files with 17 additions and 16 deletions
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core/src/net/sf/openrocket/rocketcomponent/FinSet.java
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@ -1232,36 +1232,37 @@ public abstract class FinSet extends ExternalComponent implements AxialPositiona
* @return points representing the mount's points * @return points representing the mount's points
*/ */
private Coordinate[] getMountPoints(final double xStart, final double xEnd, final double xOffset, final double yOffset) { private Coordinate[] getMountPoints(final double xStart, final double xEnd, final double xOffset, final double yOffset) {
if( null == parent){ if (parent == null) {
return new Coordinate[]{Coordinate.ZERO}; return new Coordinate[]{Coordinate.ZERO};
} }
// for a simple bodies, one increment is perfectly accurate. // for a simple body, one increment is perfectly accurate.
int divisionCount = 1; int divisionCount = 1;
// cast-assert
final SymmetricComponent body = (SymmetricComponent) getParent(); final SymmetricComponent body = (SymmetricComponent) getParent();
final double intervalLength = xEnd - xStart;
// for anything more complicated, increase the count: // for anything more complicated, increase the count:
if ((body instanceof Transition) && (((Transition)body).getType() != Shape.CONICAL)) { if ((body instanceof Transition) && (((Transition)body).getType() != Shape.CONICAL)) {
// the maximum precision to enforce when calculating the areas of fins (especially on curved parent bodies) // the maximum precision to enforce when calculating the areas of fins (especially on curved parent bodies)
final double xWidth = 0.005; // width of each individual iteration final double xWidth = 0.005; // width (in meters) of each individual iteration
divisionCount = (int)Math.ceil( (xEnd - xStart) / xWidth ); divisionCount = (int) Math.ceil(intervalLength / xWidth);
// When creating body curves, don't create more than this many divisions. -- only relevant on very large components // When creating body curves, don't create more than this many divisions. -- only relevant on very large components
final int maximumBodyDivisionCount = 100; final int maximumBodyDivisionCount = 100;
divisionCount = Math.min(maximumBodyDivisionCount, divisionCount); divisionCount = Math.min(maximumBodyDivisionCount, divisionCount);
} }
final double intervalLength = xEnd - xStart; // Recalculate the x step increment, now with the (rounded) division count.
double increment = (intervalLength)/divisionCount; double xIncrement = intervalLength / divisionCount;
// Create the points: step through the radius of the parent
double xCur = xStart; double xCur = xStart;
Coordinate[] points = new Coordinate[divisionCount+1]; Coordinate[] points = new Coordinate[divisionCount+1];
for (int index = 0; index < points.length; index++) { for (int index = 0; index < points.length; index++) {
double yCur = body.getRadius(xCur); double yCur = body.getRadius(xCur);
points[index] = new Coordinate(xCur, yCur); points[index] = new Coordinate(xCur, yCur);
xCur += increment; xCur += xIncrement;
} }
// correct last point, if beyond a rounding error from body's end. // correct last point, if beyond a rounding error from body's end.