Alright, so I need a texture for a game that I'm making and I found a texture that fit to my project(some kind of ball). The texture is next to other textures(Textures sheet).
So I had to download all the sheet. Now, I need to get only the texure that I want (that ball). And I can only circle it by a rectangle(using Paint). Is it true that XNA has an ignorant color? Or there's any other way that I can load ONLY MY BALL? and not the background of it?
Please, I really need an answer for it.. Thanks alot.
To enable colour-key transparency, select your texture in your content project and press F4 to bring up the properties window. Expand the "Content Processor" option to reveal the colour key settings. Turn on colour key and select the appropriate colour.
If you need to use a sprite sheet within XNA (ie: if you're not cropping it in your image editor), you can use the sourceRectangle parameter to SpriteBatch.Draw to treat only a particular rectangular region of your source texture as a sprite.
By default SpriteBatch will draw with BlendState.AlphaBlend (ie: if you use the Begin() overload, you don't need to set it), which will correctly handle the transparency for you.
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I have a png that's size 150x100 , and I set the UI image to the same, but it makes a bunch of extra space around it (that can be interacted with). How do I fix this?
Image of Problem: https://imgur.com/a/2ILXY1t
Unity isn't adding extra space. The image itself HAS that space.
There are options to crop out the alpha space in Unity by using the sprite editor, but by my experience i prefer using a proper Image editor like Gimp. using one is the best way to handle your image assets.
To crop out the extra space you just have to reduce the canvas size.
Well, first you could check (in Unity) wether your Image has its property Preserve Aspect set to True.
You could click Set Native Size which is right below it, so the 'box' around your image will take it's size.
Edit: Nevermind the first two. I do not know why i thought they could solve it, i looked at your image again and i, too, think there are transparent pixels above and below it. So you should try this:
Then you could check whether your picture has any transparent pixels around it, using an image editor. If it has, you would need to cut them out.
I am having trouble using the GUITexture component's border settings, in the inspector I have set leftBorder, rightBorder, topBorder, and bottomBorder, to specify how many pixels on each edge will be unstretched.
However this is the result, as you can see my image only correctly stretches to the left.
And this is even though I have correctly (I think?) sliced the sprite as following.
Incase it helps here are the settings on the rect transform that I use to hold the image.
I solved the question, turns out when importing my spritesheet I had to turn off "Generate Mip Maps"
I have a C# capture application that captures screenshot of an application and draws it to another window. Now I would like to set one color (or range) of the screenshot to be transparent and then draw it like that.
I am drawing the screenshot as sprite to 3d (directx9) surface using SharpDX.
How can I do this transparency?
When converting your screenshot to a texture, your colors should be defined by four values R,G,B,A. Alpha channel is responsible for transparency, so you should check if a color has a value / range that you want to cut out and change it's alpha value to 0.
It was a bit odd situation. My alpha modified pictures did not show up when draw:ing.
It was because I did not specify alphablend mode in .Begin-statement.
And I did not find any other way to do it than going through the whole bitmap and changing the alpha value one pixel at the time.
This may seem like a strange question, but I have a set of pictures I want to use as a fading screen saver, and I want each picture to have an accompanying quote, but each quote will be in a different place, relative to the picture.
Rather than coding a Rectangle for the area of each image, it would be easier just to draw a rectangle in the image, and have it drawn in there.
Now, the drawn shape would be a stark, uniform coloured border (lime green, for instance) because the colour doesn't appear in the pictures, and it would be on a solid coloured background, like black for instance.
My question is: If I draw a lime green rectangle on each image, how could I then, using C#, find that rectangle in the image, get the dimensions of it, and replace the lime green with the background colour, so in the end product, it'd look like the shape was never there to begin with?
I have not tried anything, I have no code to show, because it's an idea I had and though I'm sure it must be possible, I don't even know what to start searching for.
I hope this is possible, if it isn't, then I'll just draw a rectangle for each one, but that's a last resort. :)
Have you thought about using either the emgucv or aforge libraries? They are able to detect shapes in images quite easily. Though they don't detect edges perfectly, if all you want to detect is a rectangle, either one should work well.
Here are two tutorials on shape detection for emgu cv and aforge. Once you have the shape detected, then you can easily cut it out for the background. Say, for example, that you used the aforge Detection of quadrilaterals (in the link), then you could easily get the rectangles position and size by the calling of blobs[i].Rectangle; and create a rectangle with same size and position with picture background color.
If you need more clarification please feel free to comment. Nice idea!
I'm writing a paint application. User must be able to move with all objects after it's painted or edited. I have a brush and erase tool, so user can erase all or any part of object painted with brush. So I made an object DrawBrush that holds a System.Drawing.Region made from GraphicsPath.
But I don't know how to size it. I need to change size in every direction separately on mouse move (for example only to left)
can someone help me?
I'm able to do anything with this object (moving), but no sizing...
A region is like a fence - it simply marks out the boundary of an area. It does not "contain" any graphics, so resizing a region will have no direct/visible effect.
If you wish to be able to move or resize portions of a bitmap image within your editor, you will need to copy a piece of your main image (as specified by your region) into a temporary Bitmap. Then you can draw the tempoary bitmap back to your main image (in a different location and/or at a different size).
If you wish to be able to draw multiple objects in your painting program, and then edit them (move them around and resize them) independently later, then you will need to store each of them in a separate bitmap object and composite them together to display the final image on screen or save it to a flat bitmap format. If you don't keep all the shapes separately like this, you will lose too much information and you won't be able to edit them later.
Before you try to work out write the code to do this, you may need to think about the design of your editor - what does it need to do, and how will you achieve it? How is your "document" going to be described? (A single bitmap? many small bitmaps that are drawn at different locations? Vector paths?). If you write code before you understand how you will represent the document, you're likely to paint yourself into a corner (sorry about the pun) and get totally stuck.