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Merge pull request #1117 from SiboVG/issue-1093

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[fixes #1093] Add back view for fin tabs
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Joe Pfeiffer 2022-02-11 08:30:28 -07:00 committed by GitHub
commit 891ac0f4d6
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1 changed files with 97 additions and 10 deletions
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97
swing/src/net/sf/openrocket/gui/rocketfigure/FinSetShapes.java
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@ -3,6 +3,7 @@ package net.sf.openrocket.gui.rocketfigure;
import java.awt.Shape;
import java.awt.geom.Path2D;
import java.util.ArrayList;
import java.util.Arrays;
import net.sf.openrocket.rocketcomponent.FinSet;
import net.sf.openrocket.rocketcomponent.RocketComponent;
@ -89,22 +90,43 @@ public class FinSetShapes extends RocketComponentShape {
double thickness = finset.getThickness();
double height = finset.getSpan();
double tabHeight = finset.getTabHeight();
// Generate base coordinates for a single fin
Coordinate c[] = new Coordinate[4];
Coordinate[] c = new Coordinate[4];
c[0]=new Coordinate(0, 0,-thickness/2);
c[1]=new Coordinate(0, 0,thickness/2);
c[2]=new Coordinate(0,height,thickness/2);
c[3]=new Coordinate(0,height,-thickness/2);
// Generate base coordinates for a single fin tab
Coordinate[] cTab = new Coordinate[4];
cTab[0]=new Coordinate(0, 0,-thickness/2);
cTab[1]=new Coordinate(0, 0,thickness/2);
cTab[2]=new Coordinate(0, -tabHeight,thickness/2);
cTab[3]=new Coordinate(0, -tabHeight,-thickness/2);
// Apply base rotation
c = transformation.transform(c);
cTab = transformation.transform(cTab);
// Make polygon
Path2D.Double p = createUncantedPolygon(c);
if (tabHeight != 0 && finset.getTabLength() != 0) {
Path2D.Double pTab = createUncantedPolygon(cTab);
return new Shape[]{p, pTab};
}
else {
return new Shape[]{p};
}
}
private static Path2D.Double createUncantedPolygon(Coordinate[] c) {
Coordinate a;
Path2D.Double p = new Path2D.Double();
a = c[0];
a = c[0];
p.moveTo(a.z, a.y);
a = c[1];
p.lineTo(a.z, a.y);
@ -113,13 +135,27 @@ public class FinSetShapes extends RocketComponentShape {
a = c[3];
p.lineTo(a.z, a.y);
p.closePath();
return new Shape[]{p};
return p;
}
private static Shape[] cantedShapesBack(FinSet finset,
Transformation transformation) {
Transformation transformation) {
if (finset.getTabHeight() == 0 || finset.getTabLength() == 0) {
return cantedShapesBackFins(finset, transformation);
}
Shape[] toReturn;
Shape[] shapesFin = cantedShapesBackFins(finset, transformation);
Shape[] shapesTab = cantedShapesBackTabs(finset, transformation);
toReturn = Arrays.copyOf(shapesFin, shapesFin.length + shapesTab.length);
System.arraycopy(shapesTab, 0, toReturn, shapesFin.length, shapesTab.length);
return toReturn;
}
private static Shape[] cantedShapesBackFins(FinSet finset,
Transformation transformation) {
double thickness = finset.getThickness();
Coordinate[] sidePoints;
@ -169,6 +205,57 @@ public class FinSetShapes extends RocketComponentShape {
return s;
}
private static Shape[] cantedShapesBackTabs(FinSet finset,
Transformation transformation) {
double thickness = finset.getThickness();
Coordinate[] sidePoints;
Coordinate[] backPoints;
int minIndex;
Coordinate[] points = finset.getTabPoints();
// this loop finds the index @ min-y, as visible from the back
for (minIndex = points.length-1; minIndex > 0; minIndex--) {
if (points[minIndex-1].y > points[minIndex].y)
break;
}
Transformation cantTransform = finset.getCantRotation();
final Transformation compositeTransform = transformation.applyTransformation(cantTransform);
sidePoints = new Coordinate[points.length];
backPoints = new Coordinate[2*(points.length-minIndex)];
double sign = Math.copySign(1.0, finset.getCantAngle());
// Calculate points for the visible side panel
for (int i=0; i < points.length; i++) {
sidePoints[i] = points[i].add(0,0,sign*thickness/2);
}
// Calculate points for the back portion
int i=0;
for (int j=points.length-1; j >= minIndex; j--, i++) {
backPoints[i] = points[j].add(0,0,sign*thickness/2);
}
for (int j=minIndex; j <= points.length-1; j++, i++) {
backPoints[i] = points[j].add(0,0,-sign*thickness/2);
}
// Generate shapes
Shape[] s;
if (thickness > 0.0005) {
s = new Shape[2];
s[0] = makePolygonBack(sidePoints,compositeTransform);
s[1] = makePolygonBack(backPoints,compositeTransform);
} else {
s = new Shape[1];
s[0] = makePolygonBack(sidePoints,compositeTransform);
}
return s;
}
private static Shape makePolygonBack(Coordinate[] array, final Transformation t) {
Path2D.Float p;