Apply an orthographic projection transformation for a right-handed coordinate system to this matrix.
<p>
This method is equivalent to calling {@link #ortho(double, double, double, double, double, double) ortho()} with
<code>zNear=-1</code> and <code>zFar=+1</code>.
<p>
If <code>M</code> is <code>this</code> matrix and <code>O</code> the orthographic projection matrix,
then the new matrix will be <code>M * O</code>. So when transforming a
vector <code>v</code> with the new matrix by using <code>M * O * v</code>, the
orthographic projection transformation will be applied first!
<p>
In order to set the matrix to an orthographic projection without post-multiplying it,
use {@link #setOrtho2D(double, double, double, double) setOrtho2D()}.
<p>
Reference: <a href="http://www.songho.ca/opengl/gl_projectionmatrix.html#ortho">http://www.songho.ca</a>
@param left
the distance from the center to the left frustum edge
@param right
the distance from the center to the right frustum edge
@param bottom
the distance from the center to the bottom frustum edge
@param top
the distance from the center to the top frustum edge
@return this
Apply an orthographic projection transformation for a right-handed coordinate system to this matrix. <p> This method is equivalent to calling {@link #ortho(double, double, double, double, double, double) ortho()} with <code>zNear=-1</code> and <code>zFar=+1</code>. <p> If <code>M</code> is <code>this</code> matrix and <code>O</code> the orthographic projection matrix, then the new matrix will be <code>M * O</code>. So when transforming a vector <code>v</code> with the new matrix by using <code>M * O * v</code>, the orthographic projection transformation will be applied first! <p> In order to set the matrix to an orthographic projection without post-multiplying it, use {@link #setOrtho2D(double, double, double, double) setOrtho2D()}. <p> Reference: <a href="http://www.songho.ca/opengl/gl_projectionmatrix.html#ortho">http://www.songho.ca</a>
@see #ortho(double, double, double, double, double, double) @see #setOrtho2D(double, double, double, double)
@param left the distance from the center to the left frustum edge @param right the distance from the center to the right frustum edge @param bottom the distance from the center to the bottom frustum edge @param top the distance from the center to the top frustum edge @return this