Where can I find this command?
The BackgroundBitmap command manages a background image in the current viewport for tracing or design analysis.
Background bitmaps are always aligned with the x-axis of the construction plane. If you want your bitmap rotated with respect to the construction plan, you must open it in a bitmap editing program and rotate it there, or you can create a rotated construction plane and place the bitmap on it.
Only one image can be placed in a viewport at a time; placing a second deletes the first.
Background bitmaps are a construction aid, not a part of the scene that will be rendered. To place an image that will render, see the PictureFrame command or viewport Wallpaper.
Steps
| 1. | Pick a location for the first corner. |
| 2. | Pick a location for the second corner or type a length. |
Command-line option
1To1
The 1to1 option determines the width and height of the image in pixels, the resolution of the image in dots-per-inch, and automatically scales the image based on the model's current unit system.
BackgroundBitmap options
The Align option lines the background bitmap up with selected locations.
Align steps
| 1. | Pick a base point on the background bitmap. |
| 2. | Pick a reference point on the bitmap. |
| 3. | Pick a base point on the construction plane that matches the bitmap base point. |
| 4. | Pick a reference point on the construction plane that matches the bitmap reference point. |
Note: Background bitmaps are always aligned with the x-axis of the construction plane. If you want your bitmap rotated with respect to the construction plan, you must open it in a bitmap editing program and rotate it there, or you can create a rotated construction plane and place the bitmap on it.
Command-line options
Grayscale=Yes/No
The Grayscale option determines whether the background bitmap image displays in its original color or a grayscale version of the bitmap.
Grayscale=Yes (left); Grayscale=No (right).
Extract
The Extract option saves the bitmap to an external file.
Filter
The Filter option estimates pixel values to try to create a smoother image.
The Move option moves the background image.
The Place option inserts a background image in the current viewport.
Note: Placing a new background bitmap replaces the current bitmap.
Place steps
| 1. | Pick a location for the first corner. |
| 2. | Pick a location for the second corner or type a length. |
Place command-line option
1To1
The 1to1 option determines the width and height of the image in pixels, the resolution of the image in dots-per-inch, and automatically scales the image based on the model's current unit system.
Refresh
The Refresh option updates the stored bitmap if the file has changed.
Removes the background image from the current viewport.
The Scale option changes the size of the background image in the current viewport.
The Visible option determines whether the background bitmap displays in the viewport.
See also
Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015
