Plotting 2d camera

I am working to plot camera, I am currently plotting it in 3d coordinate system, which takes too much time. To plot camera I have rotation and translation matrix, where rotation is 3x3 matrix (along y-axis) and translation is 3x1 matrix ([x; y; z]). I want to draw my camera in 2d so that it may take less time to plot, something shown in attachment .

I am looking forward for answers, kindly reply me as soon as poosible. Thanks in advance for this act of kindness.