3D Layer (CameraManager)

[matsuse]

Add the controlling function of a camera to #57.
It can be treated like 3D layer. :)

Scissor rectangle is also supported.

[Example]
scene = new Object3D();
scene2 = new Object3D();

vw = new View(stage.stageWidth, stage.stageHeight, false, 0x000000, 0, 16);

camera1 = new Camera3D(1, 6000);
camera2 = new Camera3D(1, 6000);
camera3 = new Camera3D(1, 6000);

camera1.view = vw;
camera1.renderClearsContext = false;
camera1.renderPresentsContext = false;
camera1.scissorRect = new Rectangle(0, 0, 420, 480);

camera2.view = vw;
camera2.renderClearsContext = false;
camera2.renderPresentsContext = false;
camera2.scissorRect = new Rectangle(420, 0, 420, 480);

camera3.view = vw;
camera3.renderClearsContext = false;
camera3.renderPresentsContext = false;
camera3.scissorRect = new Rectangle(840, 0, 440, 480);

addChild(camera1.diagram);
camera1.diagramAlign = "TL";

addChild(camera2.diagram);
camera2.diagramAlign = "TR";

addChild(camera3.diagram);
camera3.diagramAlign = "BL";

scene.addChild(camera1);
scene2.addChild(camera2);
scene.addChild(camera3);

cm = new CameraManager(stage3D, vw);
cm.addCamera(camera1);
cm.addCamera(camera2);
cm.addCamera(camera3);

.
.
.

private function onEnterFrameHandler(ev:Event):void {
cm.clearScreen();
cm.renderLayers();
cm.drawScreen();
}

[makc]

Hmm, you actually removed #57 here?

[matsuse]

renderClearsContext and renderPresentsContext were deleted.
But, CameraManager is supporting the same function as #57.

[ChrisDenham]

From a rough reading of your request, it looks as though it does not retain backward compatibilty because it will require everyone to use CameraManager class in order to present the context by calling CameraManager.drawScreen() ? Also, doesn't look like you retained a mechanism to prevent Camera3D from clearing the context.

[matsuse]

For the following reason, I proposed this method.

1. Same technique (clear -> All layer render -> present) is used by Away3D + Starling.
2. Check "clear" and "present" each time's cost.

Of course, if there is a method of taking compatibility,
I will also think that it is ideal. :)

[makc]

you could easily do so by duplicating camera class into ManagedCamera or something, but that obviusly sucks. do you know if extending the camera is possible, or it has too much private stuff?

[ChrisDenham]

Could you retain compatibility by keeping the flags added in #57, but set them appropriately in your CameraManager class?

[matsuse]

Thank you. I try solution of the following problem.

• Backward compatibility
  (new function is added returning to the state of Camera3D render flags to help with Starling integration. #57 once and saving the state.)
• Support extends Camera Class

[makc]

Seems so. So, could you post some short demo too?

[makc]

Support extends Camera Class

actually what you mean by that? did you successfully extended their camera? e.g. for using scissors for multiple cameras view you need to be able to tweak projection, so that it's centered in scissor rectangle. I never tried myself, but I think someone said it was no feasible.

[matsuse]

Before, it was only a Camera class which can be treated by CameraManager.
Now, the restriction does not exist.

The following screen shot is an example which uses scissor rectangle.
https://twitter.com/matsuse/status/291930767930585089/photo/1

I have not realized yet the function which rectifies distortion of scissor rectangle. ;(
However, If it can be deceived well, there will also be a case which can be used like the upper screen shot. :)

[matsuse]

3D Layer Simple Example was added.
https://github.com/matsuse/Alternativa3D-3DLayer-Example