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Controls
- Choosing a rainbow
- Primary checkbox enables the primary bow and its light rays
- Secondary checkbox enables the secondary bow and its light rays
- Unchecking both when in Rain Curtain Mode will show both bows -- but no rays.
- Picking a display mode
- Rain Curtain mode shows two parallel light rays (beams) from the sun refracting off a raindrop at the both the top and bottom of the rain curtain
- Multi-drop mode shows three parallel light rays refracting off three raindrops at different altitudes
- Single drop mode shows the path inside a single drop
- Note that primary or secondary bows may be used with each mode
- Dragging the mouse pointer around
- Drag the sun around (top and right side) to change the angle of the parallel light rays from the sun and simulate a time-of-day
- Drag the person back & forth to see the effect of observer distance from the rain
- When in multi-drop mode drag the refracting drops up and down
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