Thanks for your help Greg. I ended up going with your first solution, it seems to work best for what I'm building. Anyhow, in the 2nd instance, I managed to get the plane to face the camera (thanks for the both sides tip!), I set the plane to the camera's rotation but needed to offset the x by 90.
Do you know if there's a render mode on the patch that renders the control grid and the patch at the same time or do you generate the lines that connect the control nodes up in your demo? If you do, do you use LineSegment? cheers Robbie On Jul 2, 3:44 pm, Greg209 <[email protected]> wrote: > My camera was static so I didn't have to think about that one ;) > > You could try getting the plane to match the cameras location and > rotation and then doing a moveBackward (or forward) on the plane to > offset if from the camera position. > > LookAt should work - make sure that the plane has bothsides set true > as you may be looking at the back of it. > > Greg > > On Jul 2, 3:28 pm, robbie <[email protected]> wrote: > > > > > Thanks a lot Greg. > > I know I probably sound a complete noob but am struggling to get a > > plane to always face the camera. I've tried setting its rotation to > > the camera's rotation and tried lookAt but neither seem to really > > work. > > > Thanks for your help > > Robbie > > > On Jul 2, 11:15 am, Greg209 <[email protected]> wrote: > > > > Hey robbie, > > > > Thanks for the comments. There are two methods I have used and the > > > Bezier on is the worse of the two. Here are details of both.... > > > > In the bezier explorer, each vertex on the patch is represented as a > > > cube. The following event handlers are the bits n peices that do the > > > translation. > > > > onMouseOverVertexCube is attached to the vertex, while onMouseDown & > > > onMouseMove are attached to the stage. > > > > When the mouse hovers over a vertex-cube it's inverseSceneTransform is > > > cloned and remembered. When the mouse down fires, it's X/Y coords are > > > remebemered. When the mouse moves, with the button down and the the > > > vertex-cube selected, the difference in mouseX/Y is calculated and > > > used in the matrix transform along with the previously stored > > > inverseScenetransform to give the vertex-cube's new position. > > > > Unfortunately, this seems to only vaguely work - it does the job in > > > this case but I'm not sure on how well it'll work in other > > > circumstances. > > > > private var cubeInvTransform:Matrix3D = new Matrix3D(); > > > > private function onMouseOverVertexCube( e:MouseEvent3D > > > ):void { > > > > if (!movingScene && !vertexCube) { > > > vertexCube = e.target as Cube; > > > > > > cubeInvTransform.clone(vertexCube.inverseSceneTransform); > > > } > > > } > > > > private function onMouseDown( e:MouseEvent):void { > > > mousePressed = true; > > > baseX = mouseX; > > > baseY = mouseY; > > > } > > > > private function onMouseMove( e:MouseEvent):void { > > > if (mousePressed) { > > > var mX:int = mouseX - baseX; > > > var mY:int = mouseY - baseY; > > > var n:Number3D = new Number3D(-mX, mY, 0); > > > > if (vertexCube) { > > > // Move the selected vertex > > > n.transform(n, cubeInvTransform); > > > vertexCube.x = -n.x; > > > vertexCube.y = -n.y; > > > vertexCube.z = -n.z; > > > } else { > > > ... > > > > The simpler and more accurate approach is to have a Plane in your > > > scene that always faces the camera and has such a small alpha value > > > (but not 0) that it is in effect invisible. Attached to this is a > > > mousemove event. The vertex-cube still has the mouse-over event and > > > the stage still uses the mouse down event. > > > > This time though, when the mouse down fires, the invisible plane is > > > positioned slightly in front of the vertex-cube and becomes the target > > > for the the mousemove events. By taking the scene position of the > > > event, it can be transformed directly back to the new vertex-cube > > > (with the slight offset adjustment - 15 in this case). In this > > > example, the _wirecontainer is an object container for the vertex- > > > cubes. > > > > private function onMouseOverVertexCube( e:MouseEvent3D > > > ):void { > > > // Only select the vertex if nothing else > > > happening > > > if (!movingScene && !vertexCube) { > > > vertexCube = e.target as Cube; > > > } > > > } > > > > private function onMouseDown( e:MouseEvent):void { > > > mousePressed = true; > > > > if (vertexCube) { > > > (vertexCube.material as > > > ColorMaterial).color = _vertexSelect; > > > _targetPlane.x = > > > vertexCube.scenePosition.x; > > > _targetPlane.y = > > > vertexCube.scenePosition.y; > > > _targetPlane.z = > > > vertexCube.scenePosition.z - 15; > > > } > > > } > > > private function onMouseMove( e:MouseEvent3D):void { > > > if (_cover.visible) return; > > > if (mousePressed) { > > > if (vertexCube) { > > > // Move the selected vertex > > > v.x = e.sceneX; > > > v.y = e.sceneY; > > > v.z = e.sceneZ + 15; > > > > > > v.transform(_wireContainer.inverseSceneTransform); > > > vertexCube.x = v.x; > > > vertexCube.y = v.y; > > > vertexCube.z = v.z; > > > } > > > } > > > } > > > > Hope that helps. > > > > Greg > > > > On Jul 2, 8:58 am, robbie <[email protected]> wrote: > > > > > I was having a look at Greg's great demo of Bezier patches > > > > (http://www.geepers.co.uk/software/bezier_patch_tutorial.html) > > > > and was wondering if anyone knows a simple way of generating draggable > > > > control nodes like he has implemented. So far the only way I see of > > > > doing it would be to generate a draggable box at each control point > > > > vertice, but was wondering if there was any built in feature to do > > > > this? > > > > > Thanks > > > > Robbie- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > - Show quoted text -
