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| | == Rendering System of OpenSimulator Viewer v1 == | | == Rendering System of OpenSimulator Viewer v1 == |
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| − | The OpenSimulator Viewer uses OpenGL to interface with the graphics hardware. (Should this be replaced or should it remain the same?) | + | The OSviewer uses Unreal Engine to render its awesomness |
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| − | Rendering in the viewer starts in llviewerdisplay.cpp in the display() method.
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| − | Rendering follows this flow of events:
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| − | * check window state and client state
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| − | Don't render if window is minimized.
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| − | Don't render if client is in startup state.
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| − | If client is in teleport mode only draw a static screen and progress bar.
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| − | If client requested a logout don't draw anything else.
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| − | '''prepare for next frame:'''
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| − | * update camera
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| − | * clear buffer, for drawing of dynamic textures
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| − | * setup rendering
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| − | * reset lights to OS defaults
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| − | '''update window and dynamic textures:'''
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| − | * update (draw) dynamic(/render-to-texture) textures
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| − | for each dynamic texture:
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| − | -> save camera and viewport and clear the depthbuffer if required
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| − | -> render to framebuffer
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| − | -> use glCopyTexSubImage2D to copy results to texture
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| − | -> restore camera and viewport
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| − | * if any dynamic textures were updated clear color and depth buffer
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| − | * set viewport up (with offsets and window dimensions)
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| − | '''update scene:'''
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| − | * set camera up
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| − | display_camera_update() creates projection matrix and clip distance
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| − | * update HUD
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| − | * update geometry
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| − | * cull geometry
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| − | * clear/flush last frame
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| − | * update images (?)
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| − | * state sorting
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| − | * rebuild draw pools
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| − | Seems just to remove dead pools from the list of pools.
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| − | * update sky
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| − | Redraws skytexture and cubic environment map.
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| − | '''draw geometry'''
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| − | * if render scene to texture (if vertex shaders supported) bind frame buffer to FBO
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| − | * render pipeline
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| − | unbind vertex buffers (?)
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| − | set safe default state values (matrices and stuff)
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| − | set fog and lights
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| − | render drawpools
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| − | Drawpools represent either a set of polygons (LLFacePool) or a renderpass (LLRenderPass). There are different types of either kind.
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| − | ''Facepools'' are grouped in Terrain, Ground, Tree, Avatar, Water, Sky and WLSky. There maybe multiple facepools of each type (one per spatial partition?).
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| − | ''Renderpasses'' can be Simple, Alpha, Glow, Invisible or Bump passes. There is one instance of each renderpass draw pool.
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| − | for each drawpool:
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| − | - set up vertex buffer and texture
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| − | - render faces to vertex buffer
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| − | - render vertex buffer to frame buffer (?)
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| − | Source is from http://wiki.secondlife.com/wiki/Rendering_System
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| | [[Category:OSviewer]] | | [[Category:OSviewer]] |
