Examples of java.awt.geom.AffineTransform.rotate()

java.awt.geom.AffineTransform.rotate()
Concatenates this transform with a rotation transformation. This is equivalent to calling concatenate(R), where R is an AffineTransform represented by the following matrix:
```
 [   cos(theta)    -sin(theta)    0   ] [   sin(theta)     cos(theta)    0   ] [       0              0         1   ] 
```
Rotating by a positive angle theta rotates points on the positive X axis toward the positive Y axis. Note also the discussion of Handling 90-Degree Rotations above. @param theta the angle of rotation measured in radians @since 1.2

    /**
     * Implements {@link SVGMatrix#rotate(float)}.
     */
    public SVGMatrix rotate(float angle) {
        AffineTransform tr = (AffineTransform)getAffineTransform().clone();
        tr.rotate(angle);
        return new SVGOMMatrix(tr);
    }


    /**
     * Implements {@link SVGMatrix#rotateFromVector(float,float)}.

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    public SVGMatrix rotateFromVector(float x, float y) throws SVGException {
        if (x == 0 || y == 0) {
            throw new SVGOMException(SVGException.SVG_INVALID_VALUE_ERR, "");
        }
        AffineTransform tr = (AffineTransform)getAffineTransform().clone();
        tr.rotate(Math.atan2(y, x));
        return new SVGOMMatrix(tr);
    }


    /**
     * Implements {@link SVGMatrix#flipX()}.

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            if (glyphRotation != 0f) {
                AffineTransform glyphTransform = gv.getGlyphTransform(i);
                if (glyphTransform == null) {
                    glyphTransform = new AffineTransform();
                }
                glyphTransform.rotate(glyphRotation);
                gv.setGlyphTransform(i, glyphTransform);
            }


            aciIndex += gv.getCharacterCount(i,i);
            ch = aci.setIndex(aciIndex);

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                // Define the transform of the glyph
                AffineTransform glyphPathTransform = new AffineTransform();


                // rotate midline of glyph to be normal to path
                if (horizontal) {
                    glyphPathTransform.rotate(angle);
                } else {
                    glyphPathTransform.rotate(angle-(Math.PI/2));
                }


                // re-apply any offset eg from tspan, or spacing adjust

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                // rotate midline of glyph to be normal to path
                if (horizontal) {
                    glyphPathTransform.rotate(angle);
                } else {
                    glyphPathTransform.rotate(angle-(Math.PI/2));
                }


                // re-apply any offset eg from tspan, or spacing adjust
                if (horizontal) {
                    glyphPathTransform.translate(0, glyphOffset);

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        AffineTransform tempTrans = (AffineTransform)origTrans.clone();
        
        graphics.setColor(Color.black);
        
        tempTrans.translate(EDGE_WIDTH, mapPixelHeight);
        tempTrans.rotate(-Math.PI/2); //rotate 90 degrees
        tempTrans.translate(0, -mapPixelHeight - (mapPixelWidth - mapPixelHeight));
        graphics.setTransform(tempTrans);
        
        for (int i = 0; i <lineMiddles.length; i++) {
            //top bound

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        AffineTransform origTrans = graphics.getTransform();
        AffineTransform tempTrans = (AffineTransform)origTrans.clone();
        
        
        graphics.setColor(Color.BLACK);
        tempTrans.rotate(Math.PI/2); //rotate 90 degrees
        tempTrans.translate(0, -mapPixelHeight - (mapPixelWidth - mapPixelHeight));
        graphics.setTransform(tempTrans);
        
        for (int i = 0; i <lineMiddles.length; i++) {
            //top bound

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        if (fixedPoint == null) {
            fixedPoint = new Point(display.getWidth() / 2, display.getHeight() / 2);
        }
        AffineTransform t = new AffineTransform();
        t.translate(fixedPoint.getX(), fixedPoint.getY());
        t.rotate(rotation);
        t.scale(scaleFactorX, scaleFactorY);
        t.translate(-fixedPoint.getX(), -fixedPoint.getY());
        t.translate(translateX, translateY);
        t.concatenate(graphics.getTransform());
        graphics.setTransform(t);

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    }


    public synchronized AffineTransform getTransform() {
        AffineTransform t = new AffineTransform();
        t.translate((double)display.getWidth()/(double)2, (double)display.getHeight()/(double)2);
        t.rotate(rotation);
        t.scale(scaleFactorX, scaleFactorY);
        t.translate((double)-display.getWidth()/(double)2, (double)-display.getHeight()/(double)2);
        t.translate(translateX, translateY);
        return t;
    }

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        switch (rotation)
        {
        case 90:
            at.scale(viewBox.getWidth() / viewBox.getHeight(), viewBox.getHeight() / viewBox.getWidth());
            at.translate(0, viewBox.getWidth());
            at.rotate(-Math.PI / 2.0);
            break;
        case 180:
            at.translate(viewBox.getWidth(), viewBox.getHeight());
            at.rotate(-Math.PI);
            break;

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