A source point is a point to be moved during a warp. Each source point has a corresponding destination point, which is the point that Scan2CAD will try to move it to.
Warp control points are up to 20 source-destination point pairs that define how a raster image will be warped when you use Raster Effects Menu > Warp. There are two types of control point: lock control points and move control points.
Add a lock control point by mouse Add a move control point by mouse Add a control point by typing coordinates Automatically add control points around the raster image edges Omit a control point from a warp run View control points on the screen
Add a lock control point by mouse
You can either position the cursor visually or position it at an exact coordinate location. As you move the cursor over the image, the prompt at the bottom of the screen displays the cursor’s coordinate position. Normally the source and destination coordinates that are displayed are the coordinates of the raster image with 0,0 at the top left of the image. However if the image has been scaled using the Geo option in the Vector Scale Settings dialog, the source coordinates that are displayed are the coordinates of the raster image with 0,0 at the top left of the image. The destination coordinates are preceded by the word *Geo and are the real world coordinates with their origin at the bottom left of the image. If you zoom into the image you will be able to locate exact coordinate positions easily because the cursor will have a box around its tip that is the size of one pixel. If you move the cursor slowly, the box will “jump” from pixel to pixel.
The lock control point is marked by a red numbered circle.
Add a move control point by mouse
You can either position the cursor visually or position it at an exact coordinate location. As you move the cursor over the image, the prompt at the bottom of the screen displays the cursor’s coordinate position. Normally the source and destination coordinates that are displayed are the coordinates of the raster image with 0,0 at the top left of the image. However if the image has been scaled using the Geo option in the Vector Scale Settings dialog, the source coordinates that are displayed are the coordinates of the raster image with 0,0 at the top left of the image. The destination coordinates are preceded by the word *Geo and are the real world coordinates with their origin at the bottom left of the image. If you zoom into the image you will be able to locate exact coordinate positions easily because the cursor will have a box around its tip that is the size of one pixel. If you move the cursor slowly, the box will “jump” from pixel to pixel.
You can either do this visually or using the coordinates displayed in the prompt at the bottom of the screen. If the image has been scaled using the Geo option in the Vector Scale Settings dialog the displayed real world coordinates allow you to position the destination point at an exact real world coordinate location which is useful for georeferencing. As you move your mouse a line is drawn from the source point to the destination point.
The source point is marked by a green circle and the destination point is marked by a red numbered circle. The two circles are joined by a dashed line.
You may find it helpful to display a grid when adding move control points.
Add a control point by typing coordinates
The Edit Warp Control Points dialog appears.
Scan2CAD adds a new line to the control points table in the dialog.
All coordinates are raster image coordinates with 0 0 at the top left of the image.
Automatically add control points around the raster image edges
The Edit Warp Control Points dialog appears.
Scan2CAD automatically adds eight lock control points around the edges of the raster image. These help to prevent the image picture from distorting away from the image edges when you warp it.
Delete one control point
The Edit Warp Control Points dialog appears.
Delete all control points
The Edit Warp Control Points dialog appears.
Omit a control point from a warp run
The Edit Warp Control Points dialog appears.
Save a set of control points
The Edit Warp Control Points dialog appears.
Control points are stored in files with .Con (control) extensions.
The control points displayed in the Edit Warp Control Points dialog are saved under the name you have specified.
Load a set of control points
The Edit Warp Control Points dialog appears.
The control points in the file you have loaded appear in the Edit Warp Control Points dialog.
View control points on the screenPress Shift+C or select Raster Effects Menu > Warp > View Control Points. The control points are displayed on the screen. Control points marked with a * are currently omitted from the warp run.
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Define a set of warp control points
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