pdf:transformationexamples
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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pdf:transformationexamples [2015/04/02 18:10] christian [flip diagonally] |
pdf:transformationexamples [2015/04/02 18:12] (current) christian [flip vertically] |
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| Line 27: | Line 27: | ||
| ===== flip vertically ===== | ===== flip vertically ===== | ||
| - | **x -> x , y -> -y** | + | <code smalltalk> |
| + | "x -> x , y -> -y | ||
| In this example the matrix is coded manually. | In this example the matrix is coded manually. | ||
| - | It can also be coded as <code smalltalk>Matrix scale: 4 @ -4</code> to get ''[4 0 0 -4 0 0]'' | + | It can also be coded as Matrix scale: 4 @ -4 to get '[4 0 0 -4 0 0]' |
| - | and <code smalltalk>(Matrix scale: 4 @ -4) translate: 50 @ 50</code> to get ''[4 0 0 -4 50 50]''" | + | and (Matrix scale: 4 @ -4) translate: 50 @ 50 to get '[4 0 0 -4 50 50]'" |
| - | <code smalltalk> | ||
| page := Graphics.PDF.Page | page := Graphics.PDF.Page | ||
| newInBounds: (-100 @ -100 corner: 100 @ 100) | newInBounds: (-100 @ -100 corner: 100 @ 100) | ||
| Line 53: | Line 52: | ||
| ===== flip horizontally ===== | ===== flip horizontally ===== | ||
| - | "x -> -x , y -> y" | + | <code smalltalk> |
| - | page := Graphics.PDF.Page | + | "x -> -x , y -> y" |
| - | newInBounds: (-100 @ -100 corner: 100 @ 100) | + | page := Graphics.PDF.Page |
| - | colorspace: DeviceRGB new | + | newInBounds: (-100 @ -100 corner: 100 @ 100) |
| - | render: [:renderer ¦ | + | colorspace: DeviceRGB new |
| - | renderer concat: (Matrix scale: -1 @ 1). | + | render: [:renderer ¦ |
| - | renderer moveTo: -100 @ 0; lineTo: 100 @ 0; stroke. "line at y = 0" | + | renderer concat: (Matrix scale: -1 @ 1). |
| - | renderer moveTo: 0 @ -100; lineTo: 0 @ 100; stroke. "line at x = 0" | + | renderer moveTo: -100 @ 0; lineTo: 100 @ 0; stroke. "line at y = 0" |
| - | renderer textObjectDo: [ | + | renderer moveTo: 0 @ -100; lineTo: 0 @ 100; stroke. "line at x = 0" |
| - | renderer setFont: #Helvetica size: 1. | + | renderer textObjectDo: [ |
| - | renderer textMatrix: #(-4 0 0 4 50 50); showString: '(50 50)'. | + | renderer setFont: #Helvetica size: 1. |
| - | renderer textMatrix: #(-2 0 0 2 -50 50); showString: '(-50 50)'. | + | renderer textMatrix: #(-4 0 0 4 50 50); showString: '(50 50)'. |
| - | renderer textMatrix: #(-2 0 0 2 50 -50); showString: '(50 -50)'. | + | renderer textMatrix: #(-2 0 0 2 -50 50); showString: '(-50 50)'. |
| - | renderer textMatrix: #(-2 0 0 2 -50 -50); showString: '(-50 -50)']]. | + | renderer textMatrix: #(-2 0 0 2 50 -50); showString: '(50 -50)'. |
| - | page saveAndShowAs: 'demo10b_transformationsFlipHorizontally.pdf' | + | renderer textMatrix: #(-2 0 0 2 -50 -50); showString: '(-50 -50)']]. |
| + | page saveAndShowAs: 'demo10b_transformationsFlipHorizontally.pdf' | ||
| + | </code> | ||
| {{demo10b_transformationsfliphorizontally.pdf}} | {{demo10b_transformationsfliphorizontally.pdf}} | ||
/var/www/virtual/code4hl/html/dokuwiki/data/attic/pdf/transformationexamples.1427991024.txt.gz · Last modified: 2015/04/02 18:10 by christian
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