Yesterday I asked a question on how to implement viewport in Direct2D. Now, I know that I could use device->SetTransform() but I also want to 'crop' objects in the window.
What I mean by crop is that so:
would become this:
Basically, I just want to add split screen to my application... Any help?
Related
I have a button image and I have a project with OpenGL and I have managed to create a window now I want to add an image of a button onto that window.
Is there an easy way to display a .bmp or .png?
"so is there a easy way to display"
According to the following introduction:
http://www.sfml-dev.org/tutorials/2.3/graphics-draw.php
The people at SFML make it seem as though it is not easy to do that with OpenGL. So, if you want it to be easy, use SFML.
"but I dont understand how to use SFML"
The tutorials are very simple to learn, and if a beginner like me can figure it out, then so can you.
http://www.sfml-dev.org/learn.php
I need to add a grid to the background of a game. It should be both zoomable and I should be able to know at which square I am drawing another object now. I need something like this:
What's the most common and proper way of doing this?
Use tileMap(CCTMXTiledMap) inside CCLayerPanZoom. Its easy to track grid clicked and easy to zoom.
I'm working on an application, and part of it is making the user create a shapes such as squares or rectangles. I'm wondering if there is a function in wxwidgets that enable the user to do that. What i want to do is the user will click this button then he/she can draw a square or rectangle in his/her desired size. It is like in paint where you can make your own size in your desired size. Is that possible in wxwidgets and codeblocks? maybe some related links or tutorials or anything that will help. thanks !!
You should use this contrib library:
Object Graphics Library
OGL defines an API for applications that need to display objects connected by lines. The objects can be moved around and interacted with. You can find this in contrib/src/ogl, contrib/include/wx/ogl, and contrib/samples/ogl.
This is the link:
http://docs.wxwidgets.org/2.8/wx_utilities.html
Max
Titles sais context here is "drawing", ok.
But in case you are talking about user-created rectangles as means of selecting stuff (or users end up here while searching for that context), jargon for that is rectangles as selection is "marquee selection", and you would look into Wx::Overlay to accomplish that.
I've been using label to display images. I'd like to be able to click and create a bounding box then be able to drag the cursor to move around in the image. What would I need to do this? Thanks.
I'm not 100% sure I understand what you are trying to do, but I think the QGraphicsScene is what you are looking for. You can (among many other things):
Render images (QGraphicsPixmapItem, for example)
Change the zoom level when rendering the scene on a QGraphicsView.
Select things using a "rubber band"
Move items around with the mouse (see QGraphicsItem::ItemIsMovable)
etc.
You may need to get familiar with Qt's graphics view framework.
I have an visaul object up and running
GetwindowoffsetEx moved the canvas around
But I cannot change the size of the canvas to my needs
Like should I not beable to change the canvas size for a A4-A3 printer or to a picture size
can this be done using the windows API
I do not seem to get the instructions to do this.
I take it that if I want a Zoom, I strech draw from another cavuas
am I asking the obvious in all this.
Lex Dean
I'm struggling to understand exactly what I need but you seem to want to map between two coordinate spaces in GDI.
Whilst you can use the fully general SetWorldTransform(), I suspect you are better off with the following functions:
SetWindowOrgEx(), SetWindowExtEx()
SetViewportOrgEx(), SetViewportExtEx()
The MSDN documentation also includes a full list of functions related to coordinate space transformations.