Distorted Android

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/**

 * Sometimes we want to display a Mesh on a rectangular screen. Then we need to stretch it by

 * different factors in x and y (or z) directions. If we also wanted do display some vertex effects

 * done on this mesh, let's say a bulge done by a Distort effect, and wanted the bulge to be round,

 * (i.e the same in x and y directions) then doing so without this method would be impossible.

 *

 * This sets 'stretch' factors in each 3 dimensions. All vertices of this Mesh will be premultiplied

 * by those factors in the very first line of the Vertex Shader, before any Effects are done on it.

 * Using this we can thus pre-stretch the mesh to aspect ratio equal to the surface we eventually

 * want to display the Mesh on, and this way we can achieve a round Distort bulge!

 *

 * This could also be used to pre-stretch a Rectangles Mesh to a size equal (in pixels) to the bitmap

 * this mesh is textured with - and this lets us work with all Effects in natural, pixel units.

 *

 * @param sx stretch factor in x.

 * @param sy stretch factor in y.

 * @param sz stretch factor in z.

 */

   public void setStretch(float sx, float sy, float sz)

     {

     mStretchX = sx;

     mStretchY = sy;

     mStretchZ = sz;

     }

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/**

 * Returns the x-factor set by setStretch().

 */

   public float getStretchX()

     {

     return mStretchX;

     }

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/**

 * Returns the y-factor set by setStretch().

 */

   public float getStretchY()

     {

     return mStretchY;

     }

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/**

 * Returns the z-factor set by setStretch().

 */

   public float getStretchZ()

     {

     return mStretchZ;

     }