If your application supports BOTH multisampling AND node-picking from touch events, you should use this class instead of EAGLView. More...
#import <CC3EAGLView.h>
If your application supports BOTH multisampling AND node-picking from touch events, you should use this class instead of EAGLView.
The multisampling framebuffer used when multisampling antialiasing is active interferes with node-picking from touch events, because the multisampling framebuffer does not support the pixel reading operation required by the node-picking algorithm.
This subclass adds support for node-picking while multisampling is active by adding an additional framebuffer that links the existing resolve color buffer to a newly created depth buffer. Rendering during node picking is directed to this specialized framebuffer, which does support pixel reading, by invoking the openPicking method. Once node-picking is complete, the multisampling framebuffer can be made active again for normal rendering operations by invoking the closePicking method.
The additional depth and frame buffers are only added if BOTH multisampling is active and node-picking is being used. To preserve memory, the additional buffers will not be created unless both multisampling and node-picking are active.
The heavy lifting of this mechanism is handled by a specialized CC3ES1Renderer, which this class creates and wraps.
1.7.2