Ever had a shelter, but got worried if your items would get wet from rain when wind is present? Well, now you can get more clarity on whether this is a possibility. This app allows you to see the maximum distance rain can get in, so just put your items beyond that point. You can also see the angle at which rain will come in

Assumptions:
1. Platform is flat
2. Rain will touch platform

1. Falling Speed of Raindrops (m/s): Here, you input the speed of the downward component of the trajectory of the raindrop, or how fast the raindrop is reaching earth
   
2. Horizontal Wind Speed (m/s): Here, you input the speed of the wind, which we will assume is transferred 100% perfectly to the horizontal raindrop speed to find the maximum depth of the rain onto a platform under a shelter
   
3. Shelter to Floor Height (mm): Here, you input the distance between the top of the platform to the bottom of the shelter. As this increases, time taken for raindrops have more time to reach further onto platform

Falling Speed of Raindrops (m/s): 10 Horizontal Wind Speed (m/s): 7 Shelter to Floor Height (mm): 4200

rain angle (rad) = atan(Horizontal Wind Speed (m/s)/Falling Speed of Raindrops (m/s))

rainangle = atan(7/10)
paste(rainangle,"rad")

## [1] "0.610725964389209 rad"

paste(rainangle/pi*180,"°")

## [1] "34.9920201985587 °"

Falling Speed of Raindrops (m/s): 10 Horizontal Wind Speed (m/s): 7 Shelter to Floor Height (mm): 4200

rain depth (mm) = Horizontal Wind Speed (m/s)/Falling Speed of Raindrops (m/s)*Shelter to Floor Height (mm)

raindepth = 7/10*4200
paste(raindepth,"mm")

## [1] "2940 mm"