C# - Intersecting Object With Code-Generated Image

Question

I'm trying to build a simple RPG using the C# Windows Forms (as I had recently stumbled upon a fun tutorial demonstrating this ability. I have two items:

A 'Character' object that has been placed IN game: In-game character--GUI

I also have a code-generated Draw Object, a tree--built in-game:

public void MainFormPaint(object sender, PaintEventArgs e)
        {
            //Drawing a tree, to create transparency
            Image Tree_2 = Image.FromFile("[Directory to PNG].png");
            Tree_2.Tag = "Tree";
            e.Graphics.DrawImage(Tree_2,50,50,200,200);
        }

...which generates this: Code-generated Tree Object

Seeing as I cannot detect the object by some means similar to:

Character.Bounds.Intersectswith([insert_my_picture].Bounds);

this leaves me kind of baffled, and I'm not sure what to do. I want to detect this collision, so that I can stop movement. However, I'm not sure how to check for an 'empty spot' next to me or any object for that matter that's code-generated. It's important to note that this image is code-generated to maintain the graphic's transparency (as apparently there are problems placing objects in the form and maintaining transparency with overlaying objects).

Thank you for your help!

There are many tutorials over different kinds of collision systems, as this comes up in most every game to different extents. Try a web search and get a cup of coffee.. maybe "pixel perfect" would also be a useful keyword, although usually one wants to establish additional bounding regions and separate the view/physics systems. — user2864740
– user2864740, Commented Aug 23, 2018 at 3:23
Thank you for that. I've found this link, however, I wouldn't know how to implement everything except the argument [Rectangle rectangleA]. Is there an 'other' argument that can be passed in regarding a picture? — EskinubisPrime
– EskinubisPrime, Commented Aug 23, 2018 at 4:49

EskinubisPrime · Accepted Answer · 2018-08-23 21:13:10Z

1

As the graphic was drawn at runtime, I was needing to generate a Rectangle:

Rectangle firstTree = new Rectangle();

...in the public variables area, and then created it on paint event.

public void MainFormPaint(object sender, PaintEventArgs e)
    {
        e.Graphics.DrawImage(Tree_Obj,50,50,200,200);
        firstTree.X = 50;
        firstTree.Y = 50;
        firstTree.Width = 200;
        firstTree.Height=200;
    }

The full, encapsulating bounds were only for trial. Problem solved!

answered Aug 23, 2018 at 21:13

EskinubisPrime

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