From 330a954e92dfc95fae6ae5cf10dd5998f346b304 Mon Sep 17 00:00:00 2001 From: Nivesh Rajbhandari Date: Fri, 22 Jun 2012 10:59:17 -0700 Subject: Have to guard against cases when stage lines are parallel to the canvas and the line intersection routine returns null. Signed-off-by: Nivesh Rajbhandari --- js/helper-classes/3D/draw-utils.js | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'js/helper-classes/3D/draw-utils.js') diff --git a/js/helper-classes/3D/draw-utils.js b/js/helper-classes/3D/draw-utils.js index c31424eb..168d550d 100755 --- a/js/helper-classes/3D/draw-utils.js +++ b/js/helper-classes/3D/draw-utils.js @@ -1188,10 +1188,15 @@ var DrawUtils = exports.DrawUtils = Montage.create(Component, { var bounds3D = this.viewUtils.getElementBoundsInGlobal(stageRoot); var l = MathUtils.segSegIntersection2D(bounds3D[0], bounds3D[3], [0, 0, 0], [0, stage.canvas.height, 0], 0.1); + if(!l) return; var r = MathUtils.segSegIntersection2D(bounds3D[0], bounds3D[3], [stage.canvas.width, 0, 0], [stage.canvas.width, stage.canvas.height, 0], 0.1); + if(!r) return; var t = MathUtils.segSegIntersection2D(bounds3D[0], bounds3D[1], [0, 0, 0], [stage.canvas.width, 0, 0], 0.1); + if(!t) return; var b = MathUtils.segSegIntersection2D(bounds3D[0], bounds3D[1], [0, stage.canvas.height, 0], [stage.canvas.width, stage.canvas.height, 0], 0.1); + if(!b) return; + context.save(); context.strokeStyle = "#333"; context.lineWidth = 0.5; -- cgit v1.2.3