def __enter__(self):
if not self.is_initialized:
self.init_gl()
ShaderProgram.__enter__(self)
# print self.zNear, type(self.zNear), self.shader_program, glGetUniformLocation(self.shader_program, "zNear")
glUniform1f(glGetUniformLocation(self.shader_program, "zNear"), self.zNear)
glUniform1f(glGetUniformLocation(self.shader_program, "zFar"), self.zFar)
glUniform1f(glGetUniformLocation(self.shader_program, "eye_shift"), self.eye_shift)
bg = self.background_color
glUniform4f(glGetUniformLocation(self.shader_program, "background_color"),
bg[0], bg[1], bg[2], bg[3])
glUniform1f(glGetUniformLocation(self.shader_program, "atom_scale"), self.atom_scale)
return self
