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70 lines
1.9 KiB
70 lines
1.9 KiB
Content-Type: text/x-zim-wiki
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Wiki-Format: zim 0.4
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Creation-Date: 2020-02-03T23:57:15-08:00
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====== CanvasFrame ======
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[[/doc/sfml_rust/canvas/canvas_frame/struct.CanvasFrame.html|Documentation]]
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===== Details =====
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Canvas frame is at it's core, an accumulator of meta data to draw to the screen.
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At the moment it is split up into these groups:
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* Colored items like non-textured sprites are just a list of triangles, simple vertices.
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@todo
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* Textured are grouped by their texture handle. Currently implemented as a list of lists of vertices. I don't think the vertices need to be grouped by sprite as long as they are triangle lists with texture coords included in the definition
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* Images are just the same as Textured
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* Text is a simple Font->Glyph lookup. XY coords of the font and the ASCII code
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{{{code: lang="rust" linenumbers="True"
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colored_drawables: Vec<RuntimeVertexDef>
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textured_drawables: HashMap<Arc<CanvasTextureHandle>, Vec<Vec<RuntimeVertexDef>>>
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image_drawables: HashMap<Arc<CanvasImageHandle>, Vec<Vec<RuntimeVertexDef>>>
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text_drawables: HashMap<Arc<CanvasFontHandle>, Vec<GlyphInstance>>
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}}}
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===== Future =====
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I like this immediate interface for this simple style of UI and drawing.
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@todo finish this
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Now. The CanvasFrame is closely coupled with the Drawable trait, the object which allows CanvasFrame to ingest all drawable object on a single interface
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Drawable needs a few things:
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Handle to the Texture or Image it is using
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Vertices describing it
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(vertices will be character data for text)
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Instances?
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The handle is queiried and then turned into a descriptor set in the draw_commands.
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* What if I pass using function params? But then how do I store???
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==== Problem ====
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I need to store vectors of multiple unequal types in a vec
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vec<vec<T>>
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Why can't I pass in
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--------------------
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===== Data =====
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**Borrowed:**
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**Owns:**
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--------------------
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