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Added move tool documentation

This commit is contained in:
Lewis Hemens 2014-01-20 22:10:37 +00:00
parent 1c538caade
commit 475fef7323
1 changed files with 7 additions and 0 deletions
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7
js-lib/draw.js
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@ -246,6 +246,11 @@ ascii.DrawMove.prototype.end = function(position) {
this.state.commitDraw(); this.state.commitDraw();
}; };
/**
* Follows a line in a given direction from the startPosition.
* Returns a list of positions that were line 'junctions'. This is a bit of a
* loose definition, but basically means a point around which we resize things.
*/
ascii.DrawMove.prototype.followLine = function(startPosition, direction) { ascii.DrawMove.prototype.followLine = function(startPosition, direction) {
var endPosition = startPosition.clone(); var endPosition = startPosition.clone();
var junctions = []; var junctions = [];
@ -257,6 +262,8 @@ ascii.DrawMove.prototype.followLine = function(startPosition, direction) {
} }
endPosition = nextEnd; endPosition = nextEnd;
var context = this.state.getContext(nextEnd); var context = this.state.getContext(nextEnd);
// TODO: Would be nice to skip over 4 way junctions here, but need to avoid
// clearing them too if we decide to do that.
if (!(context.left && context.right && !context.up && !context.down) && if (!(context.left && context.right && !context.up && !context.down) &&
!(!context.left && !context.right && context.up && context.down)) { !(!context.left && !context.right && context.up && context.down)) {
junctions.push(endPosition); junctions.push(endPosition);