Christians Wiki

User Tools

Site Tools

Trace:
pdf:transformationexamples

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Next revisionBoth sides next revision
pdf:transformationexamples [2015/04/02 17:40] – christianpdf:transformationexamples [2015/04/02 18:10] – [flip diagonally] christian
Line 3: Line 3:
 By default, PDF uses a conventional graph coordinate system, with the origin in the lower left corner. These examples create a 200x200 page with the origin in the middle, a vertical line at x=0, a horizontal lines at y = 0 and text in each quadrant. By default, PDF uses a conventional graph coordinate system, with the origin in the lower left corner. These examples create a 200x200 page with the origin in the middle, a vertical line at x=0, a horizontal lines at y = 0 and text in each quadrant.
  
-The code is integrated as +
- PDF.Document demo10_transformationsNone. +
- PDF.Document demo10a_transformationsFlipVertically. +
- PDF.Document demo10b_transformationsFlipHorizontally. +
- PDF.Document demo10c_transformationsFlipDiagonal. +
- PDF.Document demo10d_transformationsFlipVerticallyTranslateOrigin.+
  
 ===== no transformation ===== ===== no transformation =====
  
- page := Graphics.PDF.Page +<code smalltalk> 
- 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 moveTo: -100 @ 0; lineTo: 100 @ 0; stroke.  "line at y = 0" +  render: [:renderer ¦ 
- 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: 'demo10_transformationsNone.pdf'+      renderer textMatrix: #(2 0 0 2 -50 -50); showString: '(-50 -50)']]. 
 +page saveAndShowAs: 'demo10_transformationsNone.pdf' 
 +</code> 
 + 
 +{{demo10_transformationsnone.pdf}}
  
 ===== flip vertically ===== ===== flip vertically =====
  
- "x -> x  ,  y -> -y   +**x -> x  ,  y -> -y** 
- In this example the matrix is coded manually.  + 
- It can also be coded as 'Matrix scale: 4 @ -4' to get '[4 0 0 -4 0 0]'  +In this example the matrix is coded manually.  
- and '(Matrix scale: 4 @ -4) translate: 50 @ 50' to get '[4 0 0 -4 50 50]'" +It can also be coded as <code smalltalk>Matrix scale: 4 @ -4</code> to get ''[4 0 0 -4 0 0]''  
- page := Graphics.PDF.Page +and <code smalltalk>(Matrix scale: 4 @ -4) translate: 50 @ 50</code> to get ''[4 0 0 -4 50 50]''"
- newInBounds: (-100 @ -100 corner: 100 @ 100) +
- colorspace: DeviceRGB new +
- render: [:renderer ¦ +
- renderer concat: (Matrix scale: 1 @ -1). +
- renderer moveTo: -100 @ 0; lineTo: 100 @ 0; stroke.  "line at y = 0" +
- renderer moveTo: 0 @ -100; lineTo: 0 @ 100; stroke.  "line at x = 0" +
- renderer textObjectDo: [ +
- renderer setFont: #Helvetica size: 1. +
- 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)']]. +
- page saveAndShowAs: 'demo10a_transformationsFlipVertically.pdf'+
  
 +<code smalltalk>
 +page := Graphics.PDF.Page
 +  newInBounds: (-100 @ -100 corner: 100 @ 100)
 +  colorspace: DeviceRGB new
 +  render: [:renderer ¦
 +    renderer concat: (Matrix scale: 1 @ -1).
 +    renderer moveTo: -100 @ 0; lineTo: 100 @ 0; stroke.  "line at y = 0"
 +    renderer moveTo: 0 @ -100; lineTo: 0 @ 100; stroke.  "line at x = 0"
 +    renderer textObjectDo: [
 +      renderer setFont: #Helvetica size: 1.
 +      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)']].
 +page saveAndShowAs: 'demo10a_transformationsFlipVertically.pdf'
 +</code>
 +
 +{{demo10a_transformationsflipvertically.pdf}}
 ===== flip horizontally ===== ===== flip horizontally =====
  
Line 64: Line 68:
  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'  page saveAndShowAs: 'demo10b_transformationsFlipHorizontally.pdf'
 +
 +{{demo10b_transformationsfliphorizontally.pdf}}
  
 ===== flip diagonally ===== ===== flip diagonally =====
  
- "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: 'demo10c_transformationsFlipDiagonal.pdf'+      renderer textMatrix: #(-2 0 0 -2 -50 -50); showString: '(-50 -50)']]. 
 +page saveAndShowAs: 'demo10c_transformationsFlipDiagonal.pdf' 
 +</code> 
 +{{demo10c_transformationsflipdiagonal.pdf}}
  
 ===== flip vertically and located origin in upper left corner ===== ===== flip vertically and located origin in upper left corner =====
  
- "This is the more common layout used for reports" +<code smalltalk> 
- page := Graphics.PDF.Page +"This is the more common layout used for reports" 
- newInBounds: (0 @ 0 corner: 100 @ -100) +page := Graphics.PDF.Page 
- colorspace: DeviceRGB new +  newInBounds: (0 @ 0 corner: 100 @ -100) 
- render: [:renderer ¦ +  colorspace: DeviceRGB new 
- renderer concat: (Matrix scale: 1 @ -1). +  render: [:renderer ¦ 
- renderer textObjectDo: [ +    renderer concat: (Matrix scale: 1 @ -1). 
- renderer setFont: #Helvetica size: 1. +    renderer textObjectDo: [ 
- renderer textMatrix: #(2 0 0 -2 10 10); showString: '(10 10)'.  +      renderer setFont: #Helvetica size: 1. 
- renderer textMatrix: #(2 0 0 -2 10 20); showString: '(10 20)'. +      renderer textMatrix: #(2 0 0 -2 10 10); showString: '(10 10)'.  
- renderer textMatrix: #(2 0 0 -2 10 30); showString: '(10 30)'. +      renderer textMatrix: #(2 0 0 -2 10 20); showString: '(10 20)'. 
- renderer textMatrix: #(2 0 0 -2 10 40); showString: '(10 40)'. +      renderer textMatrix: #(2 0 0 -2 10 30); showString: '(10 30)'. 
- renderer textMatrix: #(2 0 0 -2 20 10); showString: '(20 10)'.  +      renderer textMatrix: #(2 0 0 -2 10 40); showString: '(10 40)'. 
- renderer textMatrix: #(2 0 0 -2 20 20); showString: '(20 20)'. +      renderer textMatrix: #(2 0 0 -2 20 10); showString: '(20 10)'.  
- renderer textMatrix: #(2 0 0 -2 20 30); showString: '(20 30)'. +      renderer textMatrix: #(2 0 0 -2 20 20); showString: '(20 20)'. 
- renderer textMatrix: #(2 0 0 -2 20 40); showString: '(20 40)']]. +      renderer textMatrix: #(2 0 0 -2 20 30); showString: '(20 30)'. 
- page saveAndShowAs: 'demo10d_transformationsFlipVerticallyTranslateOrigin.pdf'+      renderer textMatrix: #(2 0 0 -2 20 40); showString: '(20 40)']]. 
 +page saveAndShowAs: 'demo10d_transformationsFlipVerticallyTranslateOrigin.pdf' 
 +</code> 
 +{{demo10d_transformationsflipverticallytranslateorigin.pdf}}
/var/www/virtual/code4hl/html/dokuwiki/data/pages/pdf/transformationexamples.txt · Last modified: 2015/04/02 18:12 by christian