void initProgram(){
  glUseProgram(this.program);
  viewProjMatrixUniform=glGetUniformLocation(this.program,"viewProjMatrix");
  glUseProgram(0);
}

void initProgram ( ) { glUseProgram ( this . program ) ; viewProjMatrixUniform = glGetUniformLocation ( this . program , "viewProjMatrix" ) ; glUseProgram ( 0 ) ; }
initialize the shader program .
