Hi folks,
I'm trying to work with the Affine transform to superimpose a
snapshot of an A4 document into an SRA3 document which has crop lines.
The SRA3 template size is or (8.86in x 12.6in) in inches. The original A4
document I'm taking the snapshot of is typical A4 ( 8.27in × 11.69in).
I've taken a snapshot of the first page of the A4 original document and it
produces an image in typical A4 size 2480 X 3508 pixels.
I'm trying to figure out the AffineTransform that will place the A4 snapshot
into the centre of the SRA3 document and within the croplines.
So far I have
AffineTransform at = new AffineTransform(700, 0, 0, 700, 100, 200);
with the Affine constructor as follows
*
* @param m00 the X coordinate scaling element of the 3x3 matrix
* @param m10 the Y coordinate shearing element of the 3x3 matrix
* @param m01 the X coordinate shearing element of the 3x3 matrix
* @param m11 the Y coordinate scaling element of the 3x3 matrix
* @param m02 the X coordinate translation element of the 3x3 matrix
* @param m12 the Y coordinate translation element of the 3x3 matrix
* @since 1.2
*/
@ConstructorProperties({ "scaleX", "shearY", "shearX", "scaleY", "translateX",
"translateY" })
public AffineTransform(float m00, float m10,
float m01, float m11,
float m02, float m12) {
I.e. x-scaling, y-shearing, x-shearing, y-scaling, x-translation, y-translation
I guess the questions are
1. Why the signature was presented like this, it's quite unintuitive to
place two shearing factors between two scaling.
2. Also I can't understand why the x & y scaling factors need to be in the
hundreds. i.e. 700 and 700
3. The translation factors, are they taken from the top right of the
image/object being imported or from the centre?
Thanks in advance for any help folks,
Mark.
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