Originally posted by Waffle BAS The viewing angle from the front window will not change due to the bending of the light as it passes through the glass. Why? The metal canopy frame and it's construction.. It will not let in anymore light to bend to the pilots eyepoint. ---
Yes, the angle of the view line does not change in the refraction. That is why the more visible wider angle also provides more view from outside of the glass than the current ah view. Look at 3) in the pic below. The red angle is larger than black angle! The red line is showing what is visible in the end of the green line which is MORE than what is visible at the end of the black line.
The refraction only occurs when the glass is met in an angle. When the angle gets smaller, the shift of teh view line also gets smaller. Look at 2). And if there is no angle at all, like in 1), there is no refraction.
The point is that the additional view area between the black and green line area gets wider and wider when the target is further. Also the viewing angle from the eye to the end of the green line actually GROWS (!!!) compared to the angle of the black line when getting further away.
Because green and red lines are parallel, the green line provides practically the same viewing angle with the red line in the distance! It only blocks a thin slice of the view at close distance.. the width of the shift. And when the target is also close, this shift is almost irrelevant.
I must conclude, that widening the view to the red line angle would be almost what can be seen in real life and, therefore, modeling this refraction phenomenon with the 1-sided polygon approach would not give any unfair benefits.
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Thats why when you look at the side rails from the interior - it looks thinner than it actually is. Because it is offsetting the light. ---
It looks thinner and it also blocks the view less and it provides more outside view... which was to be proved, IMHO

The difference lies between the black and the green lines.
