PlaneReflector.m

classdef PlaneReflector < Barrier
    properties
        center Vect = Vect; % center position
        size double = 0; % full size of reflector (end to end)
        color = 'k';
        width = 3;
    end
    methods
        function obj = PlaneReflector(center, size)
            if nargin == 2
                obj.center = center;
                obj.size = size;
            end
        end
        function col = collide(obj, ray) % override this function with custom collision
            col = Collision;
            col.stop = false;
            
            k = (obj.center.x - ray.start.x)/ray.dir.x;
            col.pos = ray.start + k*ray.dir;
            col.reflDir = Vect(-ray.dir.x, ray.dir.y);
            if abs(col.pos.y - obj.center.y) < obj.size/2 && k*ray.dir.mag > 1e-6
                col.collided = true;
            else
                col.collided = false;
            end
        end
        function post_collide(obj, col, trace)
        end
        function plot_self(obj)
            plot([obj.center.x obj.center.x],...
                [obj.center.y - obj.size/2, obj.center.y + obj.size/2],...
                'LineWidth', obj.width, 'Color', obj.color);
        end
    end
end