X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=org.simantics.plant3d%2Fsrc%2Forg%2Fsimantics%2Fplant3d%2Fscenegraph%2FPipelineComponent.java;h=f71dfed41a8e1e676842951bf4a5fc2c60084fcc;hb=234ba3c6f70dfa56fce5a9e9af25d6e8a7ddff6e;hp=36c6dde1b77e0667b50b1f7a6be4cb7f4f395c6f;hpb=9fcc0bba531cd91842769f293b155c99cc5c5937;p=simantics%2F3d.git

diff --git a/org.simantics.plant3d/src/org/simantics/plant3d/scenegraph/PipelineComponent.java b/org.simantics.plant3d/src/org/simantics/plant3d/scenegraph/PipelineComponent.java
index 36c6dde1..f71dfed4 100644
--- a/org.simantics.plant3d/src/org/simantics/plant3d/scenegraph/PipelineComponent.java
+++ b/org.simantics.plant3d/src/org/simantics/plant3d/scenegraph/PipelineComponent.java
@@ -88,8 +88,8 @@ public abstract class PipelineComponent extends GeometryNode {
 	public void setNext(PipelineComponent comp) {
 		if (next == comp)
 			return;
-		if (comp == null)
-            this.next._removeRef(this);
+		if (this.next != null)
+		    this.next._removeRef(this);
 		this.next = comp;
 		this.syncnext = false;
 		syncNext();
@@ -109,7 +109,7 @@ public abstract class PipelineComponent extends GeometryNode {
 	public void setPrevious(PipelineComponent comp) {
 		if (previous == comp)
 			return;
-		if (comp == null)
+		if (this.previous != null)
 		    this.previous._removeRef(this);
 		this.previous = comp;
 		this.syncprev = false;
@@ -130,8 +130,8 @@ public abstract class PipelineComponent extends GeometryNode {
 	public void setBranch0(PipelineComponent comp) {
 		if (branch0 == comp)
 			return;
-		if (comp == null)
-            this.branch0._removeRef(this);
+		if (this.branch0 != null)
+		    this.branch0._removeRef(this);
 		this.branch0 = comp;
 		this.syncbr0 = false;
 		syncBranch0();
@@ -322,6 +322,8 @@ public abstract class PipelineComponent extends GeometryNode {
 			if (branch0 != null) {
 				if (branch0.getControlPoint() != null) {
 					PipeControlPoint branchPoint = getBranchPoint();
+					if (branchPoint == null)
+					    return false;
 					PipeControlPoint pcp = branch0.getControlPoint();
 					// TODO, relying that the other direction is connected.
 					boolean next = branch0.getPrevious() == this; // this --> branch0