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Canvas view camera element: Difference between revisions
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{{Note|This section provides a rough overview for the potentiaal reviewer, which is also intended to be used as the commit message when/if this should get committed}} | {{Note|This section provides a rough overview for the potentiaal reviewer, which is also intended to be used as the commit message when/if this should get committed}} | ||
This set of patches (touching SimGear and fgdata) implements a new <code>Canvas::Element</code> by creating a sub-class named <code>Canvas::View</code>. The meat of it is in the constructor, i.e. <code>Canvas::View::View()</code>, where an off-screen camera (RTT/FBO) is set up, the FGCanvasSystemAdapter file has been extended to provide access to the FlightGear view manager to compute/obtain the view-specific view matrix, which is then used by | This set of patches (touching SimGear and fgdata) implements a new <code>Canvas::Element</code> by creating a sub-class named <code>Canvas::View</code>. The meat of it is in the constructor, i.e. <code>Canvas::View::View()</code>, where an off-screen camera (RTT/FBO) is set up, the FGCanvasSystemAdapter file has been extended to provide access to the FlightGear view manager to compute/obtain the view-specific view matrix, which is then used by this new canvas view element to update the offscreen camera in Canvas::View::update() accordingly. | ||
This is also a good way to stress-test the renderer, as new cameras can be easily added to the scene at runtime, so that the impact of doing so can be easily measured. | BTW: This is also a good way to stress-test the renderer, as new cameras can be easily added to the scene at runtime, so that the impact of doing so can be easily measured. | ||
To actually test the new element using the [[Nasal Console]] | To actually test the new element using the [[Nasal Console]], paste the following snippet of code into it: | ||
<syntaxhighlight lang="nasal"> | <syntaxhighlight lang="nasal"> | ||