12.7. Map Object
| 12. 映射滤镜 |

### 12.7. Map Object

#### 12.7.1. Overview

图 17.259. The “Map Object” filter applied to a photograph

Original

“Map Object” applied

This filter maps a picture to an object (plane, sphere, box or cylinder).

#### 12.7.2. Activate the filter

This filter is found in the image window menu under Filters → Map → Map Object.

#### 12.7.3. Options

##### 12.7.3.1. Preview

This preview has several possibilities:

Preview!

  Preview is automatic for some options but you will have to press this button to update Preview after modifying many other parameters.

  When mouse pointer is on Preview and the Light tab is selected, it takes the form of a small hand to grab the blue point which marks light source origin and to displace it. This blue point may not be visible if light source has negative X and Y settings in the Light tab.

Zoom out, Zoom in

  Zoom buttons allow you to enlarge or to reduce image in Preview. Their action is limited, but may be useful in case of a large image.

Show preview wireframe

  Puts a grid over the preview to make displacements and rotations more easy. Works well on a plan.

##### 12.7.3.2. General Options

图 17.260. “Map Object” options (General)

Map to

  This drop-down list allows you to select the object the image will be mapped on. It can be a Plane, a Sphere, a Box or a Cylinder.

Transparent background

  This option makes image transparent around the object. If not set, the background is filled with the current background color.

Tile source image

  When moving Plane object and displacing it with Orientation tab options, a part of the image turns empty. By checking the Tile source image, source image copies will fill this empty space in. This option seems not to work with the other objects.

  | 注意
  This option works with “Plane” only.

Create new image

  When this option is checked, a new image is created with the result of filter application, so preserving the original image.

Enable antialiasing

  Check this option to conceal this unpleasant aliasing effect on borders. When checked, this option lets appear two settings:

  Depth

    Defines antialiasing quality, to the detriment of execution speed.

  Threshold

    Defines antialiasing limits. Antialiasing stops when value difference between pixels becomes lower than this set value.

##### 12.7.3.3. Light

图 17.261. “Map Object” options (Light)

Light Settings
  Lightsource type

    In this dropdown list, you can select among Point light, Directionnal light and No light.

  Lightsource color

    Press this button to open the Color Selector dialog.

Position

  If “Point light” is selected, you can control there light source Position (the blue point), according to X, Y and Z coordinates.

  If “Directional light” is selected, these X, Y and Z parameters control the “Direction vector” (effect is not evident).

##### 12.7.3.4. Material

图 17.262. “Map Object” options (Material)

Intensity Levels
  Ambient

    Amount of color to show where no light falls directly.

  Diffuse

    Intensity of original color when lit by a light source.

Reflectivity
  Diffuse

    Higher values make object reflect more light (looks brighter).

  Specular

    Controls how intense the highlights will be.

  Highlight

    Higher values make the highlights more focused.

##### 12.7.3.5. Orientation

图 17.263. “Map Object” options (Orientation)

Position

  These three sliders and their input boxes allows you to vary object position in image, according to the X, Y, Z coordinates of the object upper left corner.

Rotation

  These three sliders make the object rotate around X, Y, Z axes respectively.

##### 12.7.3.6. Box

This tab appears only when you select the Box object.

图 17.264. “Map Object” options (Box)

Match Images to Box Faces

  This function name is self explanatory: you can select an image for every face of the box. These images must be present on your screen when you call the Map Object filter.

Scale

  These X, Y, Z sliders allow you to change the size of every X, Y, Z dimension of the box.

##### 12.7.3.7. Cylinder

This tab appears only when you select the Cylinder object.

图 17.265. “Map Object” options (Cylinder)

Images for the Cap Faces

  The name of this option is self-explanatory. Images must be present on your screen when you call the Map Object filter.

Size
  Radius

    This slider and its input boxes let you control the Cylinder diameter. Unfortunately, this setting works on the image mapped onto the cylinder and resamples this image to adapt it to the new cylinder size. It would be better to have the possibility of setting size cylinder before mapping so that we could map a whole image.

  Length

    Controls cylinder length.

12.6. Make Seamless |  | 12.8. Paper Tile

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