Difference between revisions of "User:Regina/MYDrafts4"
From Apache OpenOffice Wiki
((checkpoint save)) |
((checkpoint save)) |
||
| Line 43: | Line 43: | ||
| The whole original text is very near to SVG section 7, but a reference is missing. | | The whole original text is very near to SVG section 7, but a reference is missing. | ||
|- | |- | ||
| − | | <tt | + | | <tt>matrix(a b c d e f)</tt>, specifies a transformation in the form of a transformation matrix of six values. <tt>"</tt>The values describe... |
| No problems, but the quotation mark before 'The values' has to be removed. | | No problems, but the quotation mark before 'The values' has to be removed. | ||
|- | |- | ||
Revision as of 23:03, 8 August 2012
Problems With Angle Definitions in ODF1.2
Coordinate System
There are two common ways to orientate a Cartesian coordinate system
| mathematical orientation | Bild |
| screen orientation | Bild |
Only when the orientation is determined, terms like "clockwise" are unambigious. Such orientation rule is missing in ODF 1.2.
Suggestion:
If a rule refers to a two-dimensional coordinate system, a Cartesian coordinate system in screen orientation (see figure ##) is used. The directions "clockwise", "counter clockwise", and the edge descriptions "left", "top", "right" and "button" are accordingly defined as shown in figures [##] to [##].
| clockwise | Bild |
| counter clockwise | Bild |
| left, top, right, bottom | Bild |
Angles in Attribute draw:transform
These suggestions are all about section 19.228.
| Original | Problems and Suggestions |
|---|---|
| The whole original text is very near to SVG section 7, but a reference is missing. | |
| matrix(a b c d e f), specifies a transformation in the form of a transformation matrix of six values. "The values describe... | No problems, but the quotation mark before 'The values' has to be removed. |
| rotate(<rotate-angle>), specifies a rotation by <rotate-angle> degrees about the origin of the shapes coordinate system. | The orientation of the rotation is missing. I suggest not to use "clockwise" but to define it by an equivalent matrix.
Suggestion: The value rotate(a) is equivalent to the value matrix( cos(a) sin(a) −sin(a) cos(a) 0 0). |
