multiplying the position by the normalised vector as Michael suggested seams to me the best way to go. if they are that appart from each other in your demo, the segment end just needs be shorter to avoid sorting issues or place the mc farther away, which results in same visual display.
another option would be to target slightly beneath position of the satellite, but that would of course in a certain way the way the lines are displayed. That last one would prevent updates of 2 points if you would for some reason need on user interaction to move the satellite. Fabrice On Jun 1, 2010, at 2:01 PM, Josh wrote: > Wow thanks for the quick reply guys, > > I've just rethought what I'm doing and rather than using screenXOffset > to offset the satellite I'm just adding a few extra degress to my > longitude wchi does the trick. > > However I now have the problem that as the billboard satellite orbits > my sphere the line I'm drawing to them appears sometimes appears on > top of the satellite, especially when the satellites are to the left > or right of the sphere. > > I've thrown a demo and screen grab up so you can see what I mean. > > http://visualdialects.co.uk/orbitDemo/orbitGrab.jpg > http://visualdialects.co.uk/orbitDemo/index.html > > thanks guys. > > On Jun 1, 12:35 pm, Fabrice3D <[email protected]> wrote: >> You have different align strings props, and if that doesn't help, what >> if the mc is a container and you would simply alter the x of a child >> of his? >> >> Sent from an iPhone without Flash >> >> On Jun 1, 2010, at 13:23, Josh <[email protected]> wrote: >> >>> Hi folks, >> >>> I'm looking to draw a line from a point on a sphere to a point in >>> orbit, I've given it my best shot but I'm coming up a little short, >>> any help would be amazing. >> >>> So I have some geolocated points on a sphere, which I'm placing using >>> this code... >> >>> var phi:Number = (90-lat_)*Math.PI/180; >>> var theta:Number = (lon_ +180) * Math.PI / 180; >> >>> var xp:int = (sphereRadius) * Math.sin(phi) * Math.cos(theta); >>> var zp:int = (sphereRadius) * Math.sin(phi) * Math.sin(theta); >>> var yp:int = (sphereRadius) * Math.cos(phi); >> >>> Above each of these points I'm adding a satellite billboard >> >>> msc_= new MovieClipSprite(satellite_mc, { scaling:1, ownCanvas:true, >>> smooth:true, deltaZ:0, rescale:true } ); >>> msc_.x = (sphereRadius+ 200) * Math.sin(phi) * Math.cos(theta); >>> msc_.z = (sphereRadius+ 200) * Math.sin(phi) * Math.sin(theta); >>> msc_.y = (sphereRadius+ 200) * Math.cos(phi); >> >>> I am then connecting the surface point on the sphere to it's satellite >>> in orbit using a linesegement... >> >>> var mat:WireframeMaterial = new WireframeMaterial( 0x56BEEC, {width:1, >>> height:1, thickness:2}); >>> line_ = new LineSegment( { material:mat } ); >>> line_.start = new Vertex(xp, yp, zp); >>> line_.end = new Vertex(msc_.x, msc_.y, msc_.z); >>> addChild(line_); >> >>> This all works perfectly, however I want to offset the position of the >>> satellite, something like this... >> >>> msc_.screenXOffset = 100; >> >>> But I can't figure out how to draw my line taking into account the >>> offset of my satellite so that they still connect, if awayone has an >>> idea how I could do this I'd really appreciate your help.
