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38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
1. Stop the 'RenderSystem' from using GFXDevice at all.
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It should only read data from the appropriate components to build a 'render list'.
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This 'render list' should be used outside of the RenderSystem to render explicitly inside the game loop.
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A solid justification for this change is that rendering must always be performed to some degree, even if
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no systems are in use.
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It also makes more sense for rendering to be an explicit step, instead of being hidden inside an ECS architecture
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where updates should (ideally) have no side effects apart from modifying owned data structures and related components.
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Example:
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In the main loop, all scene 'Systems' are updated, this will trigger an update for
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'MeshRenderSystem', 'TextRenderSystem', 'ParticleRenderSystem', etc.
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After system updates, the main loop will access the (specialised) 'render lists' from these systems,
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and perform rendering operations there.
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Systems
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> MeshRenderSystem
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> TextRenderSystem
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> ParticleRenderSystem
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Application
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Renderer
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> PreRender() (Get camera transform, update SET 0 and SET 1)
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> Render() (Use 'render lists' to update GPU state and add calls to the draw buffer)
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Order of execution for rendering:
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1. Update systems in scene.
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2. Call PreRender()
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3. Call GFXDevice::BeginRender() to get a draw buffer.
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4. Call Render(), passing in the draw buffer, and all data from relevant systems.
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5. Call GFXDevice::FinishRender()
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IMRPOVING RENDER SYSTEMS
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Callbacks such as OnComponentInsert() and OnComponentRemove() should be used to |