doodle/balance/numbers.go

package balance

// Numbers.
var (
	// Speed to scroll a canvas with arrow keys in Edit Mode.
	CanvasScrollSpeed int32 = 8

	// Default chunk size for canvases.
	ChunkSize = 1000
)
Abstract Drawing Canvas into Reusable Widget The `level.Canvas` is a widget that holds onto its Palette and Grid and has interactions to allow scrolling and editing the grid using the swatches available on the palette. Thus all of the logic in the Editor Mode for drawing directly onto the root SDL surface are now handled inside a level.Canvas instance. The `level.Canvas` widget has the following properties: * Like any widget it has an X,Y position and a width/height. * It has a Scroll position to control which slice of its drawing will be visible inside its bounding box. * It supports levels having negative coordinates for their pixels. It doesn't care. The default Scroll position is (0,0) at the top left corner of the widget but you can scroll into the negatives and see the negative pixels. * Keyboard keys will scroll the viewport inside the canvas. * The canvas draws only the pixels that are visible inside its bounding box. This feature will eventually pave the way toward: * Doodads being dropped on top of your map, each Doodad being its own Canvas widget. * Using drawings as button icons for the user interface, as the Canvas is a normal widget. 2018-08-17 03:37:19 +00:00			`package balance`

			`// Numbers.`
			`var (`
			`// Speed to scroll a canvas with arrow keys in Edit Mode.`
			`CanvasScrollSpeed int32 = 8`
Implement Chunk System for Pixel Data Starts the implementation of the chunk-based pixel storage system for levels and drawings. Previously the levels had a Pixels structure which was just an array of X,Y and palette index triplets. The new chunk system divides the map up into square chunks, and lets each chunk manage its own memory layout. The "MapAccessor" layout is implemented first which is a map of X,Y coordinates to their Swatches (pointer to an index of the palette). When serialized the MapAccessor maps the "X,Y": "index" similarly to the old Pixels array. The object hierarchy for the chunk system is like: * Chunker: the manager of the chunks who keeps track of the ChunkSize and a map of "chunk coordinates" to the chunk in charge of it. * Chunk: a part of the drawing ChunkSize length square. A chunk has a Type (of how it stores its data, 0 being a map[Point]Swatch and 1 being a [][]Swatch 2D array), and the chunk has an Accessor which implements the underlying type. * Accessor: an interface for a Chunk to provide access to its pixels. * MapAccessor: a "sparse map" of coordinates to their Swatches. * GridAccessor: TBD, will be a "dense" 2D grid of Swatches. The JSON files are loaded in two passes: 1. The chunks only load their swatch indexes from disk. 2. With the palette also loaded, the chunks are "inflated" and linked to their swatch pointers. Misc changes: * The `level.Canvas` UI widget switches from the old Grid data type to being able to directly use a `level.Chunker` * The Chunker is a shared data type between the on-disk level format and the actual renderer (level.Canvas), so saving the level is easy because you can just pull the Chunker out from the canvas. * ChunkSize is stored inside the level file and the default value is at balance/numbers.go: 1000 2018-09-23 22:20:45 +00:00
			`// Default chunk size for canvases.`
			`ChunkSize = 1000`
Abstract Drawing Canvas into Reusable Widget The `level.Canvas` is a widget that holds onto its Palette and Grid and has interactions to allow scrolling and editing the grid using the swatches available on the palette. Thus all of the logic in the Editor Mode for drawing directly onto the root SDL surface are now handled inside a level.Canvas instance. The `level.Canvas` widget has the following properties: * Like any widget it has an X,Y position and a width/height. * It has a Scroll position to control which slice of its drawing will be visible inside its bounding box. * It supports levels having negative coordinates for their pixels. It doesn't care. The default Scroll position is (0,0) at the top left corner of the widget but you can scroll into the negatives and see the negative pixels. * Keyboard keys will scroll the viewport inside the canvas. * The canvas draws only the pixels that are visible inside its bounding box. This feature will eventually pave the way toward: * Doodads being dropped on top of your map, each Doodad being its own Canvas widget. * Using drawings as button icons for the user interface, as the Canvas is a normal widget. 2018-08-17 03:37:19 +00:00			`)`