I created a picture for each post. It takes inputs at the post creat/edit step, then, calculates in a Class and generates the picture. The inputs are saved into the post meta. Now I need to display the picture after publish the post.
From the editing page, I can see the Class works perfectly and generates the right picture. I think, when displaying the post, the first step is to require the inputs that saved in post meta, but each post has a picture, how the class work through them. So, my guess is to make a loop?