Hi all!

Need some help, don't know some function..

I'trying to flip one image horizontally, so something like this:


It'll be depending from the direction of moving of the char, "face forward"

I've found some methods with canvas and with matrix, but I allways have some problems with coordinates.
So I wanted to use a Matrix methods, to transpose the matrix of the image and then rotate 90°. Rotate method is clear but I can't find the transpose method. (Transpose at wikipedia)

Matrix operations were at school for a long time ago, I've forgot this all stuff

Please advice me the right method!

one more time the main problem - I want to flip not the whole canvas, but only the "jumping" image, wich have dynamical coordinates x, y


any advice?


UPD:

I've found such a post, but the problem is the same - they are flipping the whole canvas and I need to flip only the single image, without background images

the app from that post:

OK, I've found the solution.. It's so simple...

1. set some matrix scale: matrix.setScale(-1.0f, 1.0f);
2. create new Bitmap with this matrix
3. show the Bitmap

Example from doDraw() method:



PIG_FLYING_DIRECTION is a float -1.0f or 1.0f for left or right flipping of image

pigPaint is a initial image Bitmap instance; c - Canvas; pigX, pigY - coordinates