legends2k / 2d-fov Goto Github PK

Hi! I really liked your article and the source codes for that 2d-fov. I've found a bug in your code, I spend 2 days finding and fix, but I can't find a solution. Please help.
A test scene is:

scene = {
         polygons: [
             { coords: [ 96,72,120,72,120,96,96,96 ],
               colour: "128, 128, 128",
               stroke: 1,
               fill: true },

        ],
         observer: { loc: vec2.fromValues(50, 96),
                     dir: vec2.fromValues(-0.707106781186, 0.707106781186),
                     colour: observerColour },
         target: { loc: vec2.fromValues(500, 100),
                   dir: vec2.fromValues(-1, 0),
                   colour: targetColour }
     };

As you see, fov calculation is incorrect

Not sure if you're actually interested in this anymore, but thought I'd bring it up just in case. I'm actually trying to do something similar to what you already have, but with a full 360° range. I could use your code directly and just run it twice for those cases where the total FoV is greater than 180° (splitting the range between the two runs) and union the polygons, but that's likely way more inefficient than it could be with a real solution.