Matrix4d.setOrtho

Set this matrix to be an orthographic projection transformation for a right-handed coordinate system using OpenGL's NDC z range of <code>[-1..+1]</code>. <p> In order to apply the orthographic projection to an already existing transformation, use {@link #ortho(double, double, double, double, double, double) ortho()}. <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)

@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 @param zNear near clipping plane distance @param zFar far clipping plane distance @return this