protected void configurePssmShader(SSPssmShaderProgram pgm)
 {
     if (pgm == null)
     {
         return;
     }
     pgm.Activate();
     pgm.UniShadowMapVPs = m_shadowViewProjMatrices;
 }
 protected void configurePssmShader(SSPssmShaderProgram pgm)
 {
     if (pgm == null) return;
     pgm.Activate();
     pgm.UniShadowMapVPs = m_shadowViewProjMatrices;
 }