Difference between revisions of "OnCanvasSymmetryTool"
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== Description == | == Description == | ||
Redesign parts of the Cloned Tiles User Interface. In particular, this project will focus on on-canvas control of the size, position, orientation and skew of the boundary of the base tile as well as on-canvas control of the number and “placement” of cloned tiles (placement refers to the attributes currently specified either by the row | Redesign parts of the Cloned Tiles User Interface. In particular, this project will focus on on-canvas control of the size, position, orientation and skew of the boundary of the base tile as well as on-canvas control of the number and “placement” of cloned tiles (placement refers to the attributes currently specified either by the row/column or the width/height fields in the current Create Cloned Tiles dialog). | ||
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== Use Cases == | == Use Cases == | ||
UC 1) User has created one or more objects which they want to replicate using a group of symmetry relationships (rotation, reflection, translation or glide). | UC 1) User has created one or more objects which they want to replicate using a group of symmetry relationships (rotation, reflection, translation or glide). The user must choose a symmetry group or create their own set of transformation rules. | ||
In order to choose the symmetry relationships that will produce the desired effect, the user must understand how clones of the base tile will be transformed. For example, if the user selects a symmetry type of PM, they will want to know at a general level that the tile will be reflected in one direction and translated in an orthogonal direction. At a more specific level, they will want to know which direction is the direction of translation and which direction is the direction of reflection. | In order to choose the symmetry relationships that will produce the desired effect, the user must understand how clones of the base tile will be transformed. For example, if the user selects a symmetry type of PM, they will want to know at a general level that the tile will be reflected in one direction and translated in an orthogonal direction. At a more specific level, they will want to know which direction is the direction of translation and which direction is the direction of reflection. | ||
They may also wish to modify aspects of the symmetry relationships such as changing the orientation of the transformation, changing the size of the transformation (such as the distance of translation, etc). These items are covered under different use cases below. | They may also wish to modify aspects of the symmetry relationships such as changing the orientation of the transformation, changing the size of the transformation (such as the distance of translation, etc). These items are covered under different use cases below. | ||
An on-canvas visualization of the base tile and of the tiling pattern is proposed. | An on-canvas visualization of the base tile and of the tiling pattern is proposed. | ||
* Draw an outline to show the shape and position of base tile as well as shape and position of transformed base tile. This shape represents the shaw transformed by the underlying algorithm. If the objects in the base tile cover the entire base tile and do not go outside the base tile, this outline may be redundant. however, in most cases, the objects do not cover the entire base tile and frequently extend beyond the edges. | |||
* Markers to show operations at edges or corners | * Markers to show operations at edges or corners | ||
** Potential issue: Conflict with transformation markers | ** Potential issue: Conflict with transformation markers | ||
* Use different line styles to denote edges of different styles such as double line for reflection, dashed line for translation. | * Use different line styles to denote edges of different styles such as double line for reflection, dashed line for translation. | ||
** Potential issue: Conflict with selection rectangle | ** Potential issue: Conflict with selection rectangle | ||
The following diagram illustrates this approach: | |||
[[Media:WallpaperTransformations.png | Transformation images for wallpaper groups]] | [[Media:WallpaperTransformations.png | Transformation images for wallpaper groups]] | ||
UC 2) | UC 2) Related to Use Case 1, the user must apply a set of transformations to a set of objects. | ||
In order to do this, the user must specify the objects to be transformed and the set of transformation operations to be performed. | |||
One approach to do this on-canvas is as follows: | |||
Drag a rectangle around one or more items, the bounding box of the selected items will be used as input to define the size of the base tile. | |||
Based on symmetry group specified in toolbar, the shape of the base tile will be determined. It will have a default (axis aligned) orientation. | |||
If the root item of the selection is not a group, an SVG group will be created as a container around the objects. Tis will allow the user to add objects to the base tile in the future. The base tile inkscape SVG attributes will be defined on the group. | |||
If the root item is already a base tile, select and show the current base tile, and do not create a new one. Do not change the symmetry type if it does not match the toolbar. | |||
If already a base tile | |||
UC 3) Create clones from a base tile using standard symmetry groups | UC 3) Create multiple clones from a base tile using standard symmetry groups | ||
'''Frieze''' | '''Frieze''' | ||
Revision as of 00:36, 29 May 2012
The On-Canvas Support for Creating and Modifying Wallpaper Symmetry Groups is based on the functionality currently available in the "Create Tiled Clones ..." dialog.
Description
Redesign parts of the Cloned Tiles User Interface. In particular, this project will focus on on-canvas control of the size, position, orientation and skew of the boundary of the base tile as well as on-canvas control of the number and “placement” of cloned tiles (placement refers to the attributes currently specified either by the row/column or the width/height fields in the current Create Cloned Tiles dialog).
Related Blueprints
- Tiling Tool for Wallpaper, Radial and Line tiling
Use Cases
UC 1) User has created one or more objects which they want to replicate using a group of symmetry relationships (rotation, reflection, translation or glide). The user must choose a symmetry group or create their own set of transformation rules.
In order to choose the symmetry relationships that will produce the desired effect, the user must understand how clones of the base tile will be transformed. For example, if the user selects a symmetry type of PM, they will want to know at a general level that the tile will be reflected in one direction and translated in an orthogonal direction. At a more specific level, they will want to know which direction is the direction of translation and which direction is the direction of reflection.
They may also wish to modify aspects of the symmetry relationships such as changing the orientation of the transformation, changing the size of the transformation (such as the distance of translation, etc). These items are covered under different use cases below.
An on-canvas visualization of the base tile and of the tiling pattern is proposed.
- Draw an outline to show the shape and position of base tile as well as shape and position of transformed base tile. This shape represents the shaw transformed by the underlying algorithm. If the objects in the base tile cover the entire base tile and do not go outside the base tile, this outline may be redundant. however, in most cases, the objects do not cover the entire base tile and frequently extend beyond the edges.
- Markers to show operations at edges or corners
- Potential issue: Conflict with transformation markers
- Use different line styles to denote edges of different styles such as double line for reflection, dashed line for translation.
- Potential issue: Conflict with selection rectangle
The following diagram illustrates this approach:
Transformation images for wallpaper groups
UC 2) Related to Use Case 1, the user must apply a set of transformations to a set of objects.
In order to do this, the user must specify the objects to be transformed and the set of transformation operations to be performed.
One approach to do this on-canvas is as follows:
Drag a rectangle around one or more items, the bounding box of the selected items will be used as input to define the size of the base tile. Based on symmetry group specified in toolbar, the shape of the base tile will be determined. It will have a default (axis aligned) orientation. If the root item of the selection is not a group, an SVG group will be created as a container around the objects. Tis will allow the user to add objects to the base tile in the future. The base tile inkscape SVG attributes will be defined on the group.
If the root item is already a base tile, select and show the current base tile, and do not create a new one. Do not change the symmetry type if it does not match the toolbar.
UC 3) Create multiple clones from a base tile using standard symmetry groups
Frieze Select a base tile and ?? click on a path. Base tile is repeated along path using symmetry properties Clipped at beginning and ends of path like text - if path extended? extend pattern clone objects reference base tile and have an offset from base to indicate number of repeats. Alternatively, select a base tile and click to create first clone, drag "left" or "right" to create additional clones based symmetry pattern
Rosette
Wallpaper
UC 4) Modify base tile size, posiiton, orientation, skew, angle and update cloned tiles
UC 5) Change symmetry group of base tile (maybe even allow non planar tilings) and update cloned tiles
UC 6) Apply size and shift deltas to cloned tiles
UC 7) Work with existing SVG documents.