Wave Modeling Forum

You can now add velocity vectors onto the rendered wave field: In the "Modify Visualization" panel, you will now see three new options related to the vector arrow overlay: You can choose to include vectors from either the instantaneous velocity field or the time-averaged velocity (current) field (as shown here). You can change the relative length of the arrows with the "scale factor" or increase/decrease the number of arrows displayed with the "density factor." By changing these two factors, you are able to display vector field detail on any scale of interest. For example, if I was interested in seeing the current profile in the immediate vicinity of one of the breakwaters in the above images, I could increase the density to a large value (e.g. 10 to 10x the number of arrows in both the x and y direction), increase the scale factor to larger value as well (e.g. 10 to increase the length of the arrow for even small speeds, such that we can see the flow direction in these low-energy areas as well), and then zoom into the area in Explorer View to see the detail:

It is a very experimental feature, but you can now add 3D boxes of arbitrary size, orientation, and location into the Explorer (fly-through) view. Any number of boxes can be added to the view. The box properties are contained in a json file (e.g. model.json), and are loaded through the interface - there is a new user input box for this. The json structure is straightforward, for example: { "models": [ { "id": "osm_188709102", "type": "box", "center": [ 1022.16251341931, 613.86812025605786, 1.8745103807381747 ], "size": [ 46.462879871294632, 34.4986726674656, 10 ], "rotation": 346.32312765512887 }, } where the "id" is whatever you would like to call that particular box, "type" is the type of object (right the only option is "box"), "center" gives the x, y, and z coordinates of the center of the box in units of meters relative to the lower, left corner of the simulation grid, "size" gives the width, length, and height of the box in meters, and "rotation" gives the rotation of box in degrees, in the grid coordinate system. The json snippet above is for one box, just keep adding additional sets of data to the json for more boxes. Right now, I am using the boxes as building representations, but anything you can represent with a set of boxes can be constructed & rendered (e.g. piers, bridges, etc.). All boxes appear with shades of gray sides, as I am trying to keep the render cost of these objects as low as possible. The Ventura, Hermosa, Balboa, Newport (CA), Oceanside, Scripps Pier, Morro Rock, Santa Cruz Harbor, Pacifica, and Waimea Bay examples all have "buildings" added. For this, I am using Open Street Maps (OSM) to retrieve the building information, and you will see that this database is often missing small, residental buildings. If anyone is interested, I am happy to provide the code I am using to pull the OSM data. Below is a snapshot of what the buildings look like, and here is a fly-through video: https://www.youtube.com/watch?v=vJyjgJ4wy94

Finally figured out how to add a drone-type fly around mode. It was not easy, maybe getting too close to creating my own game engine... Now, from the Modify Visualization panel, if you choose "Explorer" as your View Mode, you can move through the scene in 3D. For example, with the Oceanside example, your starting "View Mode" view will look like this: You can "fly" through the scene using the W [forward], S [backward], A [pan left], and D [pan right] keys to move. You can also hold the left button on your mouse and move around. To change your view direction, hold the right mouse button and move the mouse around. To move vertically up and down, use the wheel on your mouse, or the trackpad zoom-in (pinch) gesture. All other viz features work as they did previously. Note that if you want to lock the camera position to the ground - to simulate walking / driving around - add "renderLocktoGround" to your config.json file, and set the value to 1 (integer). Here is a fun landslide tsunami animation using this 3D view: https://youtu.be/3X1edF9A5kY