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vRigger Learning Center

This also applies to cable, chain, and webbing.

Gear that is anchored includes anchors, rocks, trees, tripods, trucks, etc.

A "bight" is a simple loop in a rope that does not cross itself.

A "bend" is a knot that joins two ropes together. Bends can only be attached to the end of a rope.

A "hitch" is a type of knot that must be tied around around another object.

"Descending devices" (e.g., ATCs, Brake Bar Racks, Figure 8s, Rescue 8s, etc) create friction as their primary purpose. The friction in descending devices is always considered when calculating forces.

The "Safety Factor" is the ratio between the gear's breaking strength and the maximum load applied to the gear (e.g., 5:1).

Inserting a Picture

In addition to inserting gear onto the workspace, you can insert pictures. Pictures are helpful when you want to add a background image (e.g., a cliff or industrial site).

Click the Insert Picture button on the Gear toolbar to insert a picture:

Insert Picture Button

The picture file can be in the *.bmp, *.gif, *.jpg, *.png, or *.tif format. (Occasionally, vRigger will need to reduce the size of some *.gif, *.png, or *.tif images. If this happens, you can convert the file to the bmp format before inserting it into vRigger.)

Mountains

Industrial Site

Transparent Pictures

Areas on inserted pictures that are pure RGB yellow (i.e., 255 red, 255 green, and 0 blue) will be transparent in vRigger. For example, the truck shown in the bitmap below is surrounded by pure yellow. When that bitmap is inserted into vRigger, the yellow area becomes transparent. If you want to create transparent pictures, it's preferable to use the bmp (i.e., bitmap) format and you should definitely avoid the jpg format.
 

Truck   Transparent Images
Bitmap of Truck with Yellow   Yellow Becomes Transparent


Some imaging software has the option to "anti-alias" colors when two colors meet. This causes the color of your picture (e.g., the truck in the above example) to mix with the yellow background. When this image is then displayed in vRigger, the no-longer-pure-yellow will not be transparent and a yellow hue will appear around the object.

Anti-aliasing will create a yellow hue

To resolve this, you should turn off the anti-aliasing so the edge between the object and the yellow background remains pure.

No aliasing

Additional Tips

As shown in the above video, if you insert picture to use as a background image, you can lock the picture so it ignores your mouse clicks.