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diff --git a/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkUtil.java b/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkUtil.java
new file mode 100644
index 00000000..639d894e
--- /dev/null
+++ b/org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/utils/vtkUtil.java
@@ -0,0 +1,119 @@
+package org.simantics.g3d.vtk.utils;
+
+import java.util.Collection;
+
+import javax.vecmath.AxisAngle4d;
+import javax.vecmath.Matrix4d;
+import javax.vecmath.Point2d;
+import javax.vecmath.Point3d;
+import javax.vecmath.Quat4d;
+import javax.vecmath.Tuple3d;
+import javax.vecmath.Vector3d;
+
+import org.simantics.g3d.math.MathTools;
+import org.simantics.g3d.math.Ray;
+
+import vtk.vtkMatrix4x4;
+import vtk.vtkProp3D;
+import vtk.vtkRenderer;
+
+public class vtkUtil {
+
+	public static Ray createMouseRay(vtkRenderer ren1, double x, double y) {
+		Point2d screenPos = new Point2d(x,y);
+		Point3d worldCoords = getWorldCoordinates(ren1, screenPos, 0);
+		Point3d worldCoords2 = getWorldCoordinates(ren1, screenPos, 1);
+		Vector3d dir = new Vector3d(worldCoords2);
+		dir.sub(worldCoords);
+		return new Ray(worldCoords, dir);
+	}
+	
+	public static Point3d getWorldCoordinates(vtkRenderer ren1, Point2d screenPosition, double zPos) {
+				
+		 ren1.SetDisplayPoint(screenPosition.x, ren1.GetSize()[1]-screenPosition.y, zPos);
+		 ren1.DisplayToWorld();
+		 double world[] = ren1.GetWorldPoint();	 
+
+		return new Point3d(world);
+		 
+	}
+	
+	public static Point2d getScreenCoordinates(vtkRenderer ren1, Tuple3d worldPos) {
+		 ren1.SetWorldPoint(worldPos.x, worldPos.y, worldPos.z, 0.0);
+		 ren1.WorldToDisplay();
+		 double screen[] = ren1.GetDisplayPoint();
+		 
+		 return new Point2d(screen);
+		 
+	}
+
+	public static Matrix4d getMatrix(vtkMatrix4x4 ptm) {
+		Matrix4d mat = new Matrix4d();
+		for (int i = 0; i < 4; i++) {
+			for (int j = 0; j < 4; j++) {
+				mat.setElement(i, j, ptm.GetElement(i, j));
+			}
+		}
+
+		return mat;
+	}
+	
+	public static vtkMatrix4x4 getMatrix(Matrix4d m) {
+		vtkMatrix4x4 mat= new vtkMatrix4x4();
+		for (int i = 0; i < 4; i++) {
+			for (int j = 0; j < 4; j++) {
+				mat.SetElement(i, j, m.getElement(i, j));
+			}
+		}
+		return mat;
+	}
+	
+	public static void updateTransform(Collection<vtkProp3D> props, Vector3d pos, Quat4d q) {
+		AxisAngle4d aa = new AxisAngle4d();
+		aa.set(q);
+		updateTransform(props, pos, aa);
+	}
+	
+	public static void updateTransform(vtkProp3D actor, double pos[], AxisAngle4d aa) {
+		actor.SetOrientation(0, 0, 0);
+		actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+		actor.SetPosition(pos);
+	}
+	
+	public static void updateTransform(vtkProp3D actor, AxisAngle4d aa) {
+		actor.SetOrientation(0, 0, 0);
+		actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+	}
+	
+	
+	public static void updateTransform(Collection<vtkProp3D> props, Vector3d pos, AxisAngle4d aa) {
+		for (vtkProp3D actor : props) {
+			actor.SetOrientation(0, 0, 0);
+			actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+			actor.SetPosition(pos.x, pos.y, pos.z);
+		}
+	}
+	
+	public static void updateTransform(Collection<vtkProp3D> props, Vector3d pos, AxisAngle4d aa, double scale) {
+		for (vtkProp3D actor : props) {
+			actor.SetOrientation(0, 0, 0);
+			actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+			actor.SetScale(scale);
+			actor.SetPosition(pos.x,pos.y,pos.z);
+		}
+	}
+	
+	public static void updateTransform(vtkProp3D actor, Vector3d pos, AxisAngle4d aa, double scale) {
+		actor.SetOrientation(0, 0, 0);
+		actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+		actor.SetScale(scale);
+		actor.SetPosition(pos.x,pos.y,pos.z);
+	}
+	
+	public static void updateTransform(vtkProp3D actor, Vector3d pos, AxisAngle4d aa, double scalex, double scaley, double scalez) {
+		actor.SetOrientation(0, 0, 0);
+		actor.RotateWXYZ(MathTools.radToDeg(aa.angle), aa.x, aa.y, aa.z);
+		actor.SetScale(scalex,scaley, scalez);
+		actor.SetPosition(pos.x,pos.y,pos.z);
+	}
+}