diff options
| -rw-r--r-- | space.js | 7 | ||||
| -rw-r--r-- | utils/raster.js | 15 |
2 files changed, 19 insertions, 3 deletions
@@ -134,10 +134,11 @@ function Space(){ this.subsection = function(range){ // range is a coordinate pair // Similarly excludes this.loc newspace = new Space(); - for (let line=range[0][0]; line<=range[1][0]; line++){ + for (let line=range[0][0]; line<range[1][0]; line++){ newspace.data.push([]); - for (let chr=range[0][1]; chr<=range[1][1]; chr++){ - newspace.data[line-range[0][0]].push(this.data[line][chr] || ''); + let thisline = this.data[line] || []; + for (let chr=range[0][1]; chr<range[1][1]; chr++){ + newspace.data[line-range[0][0]].push(thisline[chr] || ''); } } return newspace; diff --git a/utils/raster.js b/utils/raster.js new file mode 100644 index 0000000..44f4678 --- /dev/null +++ b/utils/raster.js @@ -0,0 +1,15 @@ +// Takes a space object and 'rasterizes' it into an object mapping of 8x16 tiles which may not be filled with empty space + +const ms = require('./measurespace'); +const vec = require('./vec'); + +module.exports = function(space){ + // just use .subsection + let tiles = {}; + dim = ms(space).map(coord => vec.dot(coord,[1/8, 1/16])).map(tile => vec.elem(tile, [], a => Math.floor(a))); + for (let y=dim[0][0]; y<=dim[0][1]; y++) for (let x=dim[1][0]; x<=dim[1][1]; x++){ + let tile = tileToChar([y,x]); + tiles[tile] = space.subsection(tile, vec.add(tile, [8,16])); + } + return tiles +} |