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have arrows now, rough

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This commit is contained in:
Peter Cottle 2012-09-19 19:18:07 -07:00
parent b566ebf6f6
commit 8d6e835538
1 changed files with 14 additions and 0 deletions
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14
src/tree.js
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@ -104,6 +104,12 @@ var VisEdge = Backbone.Model.extend({
y: pos.y + delta * dir
};
};
var offset2d = function(pos, x, y) {
return {
x: pos.x + x,
y: pos.y + y
};
};
// first offset tail and head by radii
tailPos = offset(tailPos, -1, tail.getRadius());
@ -119,6 +125,14 @@ var VisEdge = Backbone.Model.extend({
str += coords(offset(headPos, 1)) + ' ';
// now finish
str += coords(headPos);
// arrow head
// TODO default sizing
var delta = GRAPHICS.arrowHeadSize || 10;
str += ' L' + coords(offset2d(headPos, -delta, delta));
str += ' L' + coords(offset2d(headPos, delta, delta));
str += ' L' + coords(headPos);
return str;
},