I'm working with a little project that I'm planning on using HTML5 in.
So far I've managed to set up a little demo with some small functionality, but it still lacks all functionality necessary. I hope that someone here might have some time to spare for a beginner.
Anyway, here's my demo:
http://persturesson.com/demo/
Right now, as you can see, the image (yup, it's an image and not a drawn object, the image will change for the final version so don't put to much intot that) is draggable. But I would like to be able to resize the image on the fly like this:
http://simonsarris.com/project/canvasdemo/demo2.html
Anyone that has an idea how to incorporate the functionality from this demo in mine?
All inputs are appreciated, thanks.
I wrote the demo you were looking at
So the relevant drawImage looks like this:
context . drawImage(image, dx, dy, dw, dh)
That's destination x, y, width and height. That means, regardless of the size of the original image, you can draw it larger or smaller onto the canvas. In my box example you change the width and height of fillRect, instead here you should just be changing the dw and dh values of drawImage.
So on line 32 of your transform.js file, instead of 150,150 for the dw,dh values, there should be the equivalent of a saved (and modified) width and height, just like in my demo.
Everything else (getting the handles to work, etc) should be pretty much the same.
If there are still any questions, let me know!
Related
I'm following a Pygame tutorial on YouTube published by Clear Code. So far it's gone well but I've run into an inconsistency between the demo on the video and the behaviour of my code, I'm pretty sure I'm doing exactly what the tutorial instructs, but my results are different.
I'm attempting to draw a border around a rectangle, the rectangle was created from a surface that contains some text as follows.
test_font = pygame.font.Font('font\Pixeltype.ttf',50)
score_surf = test_font.render('My Game', False, 'Black')
score_rect = score_surf.get_rect(center = (400,50))
#Later in the main loop
pygame.draw.rect(screen,'Pink',score_rect)
pygame.draw.rect(screen,'Pink',score_rect, 6)
My understanding is that the first pygame.draw.rect should colour in the area of the score_rect, and the second should create a border that goes slightly outside the area of the score_rect. This should leave a bit of pink visible all the way around the text. In the video I can see this happening, but when I run the code on my system the second pygame.draw.rect that specifies a border width doesn't seem to have any effect.
I've experimented a bit by removing the first pygame.draw.rect, this works mostly as expected I get a pink rectangular border around my text, but this border is strictly insisde the score_rect.
According to the Pygame documentation specifying the width argument should cause the border to go slightly outside the score_rect. However I'm not seeing this behaviour.
Link to Pygame documentation I'm reading
https://www.pygame.org/docs/ref/draw.html#pygame.draw.rect
Link to Youtube video I'm following, and location in video
https://youtu.be/AY9MnQ4x3zk?t=4879
Edit: Sorry I forgot to note my software versions
Pygame: 2.1.2
Python: 3.10.2
OS Windows 10
Any help would be appreciated.
I've come across people asking this exact question on other sites (not in a way that's very searchable, don't worry), so I'm mainly copy pasting my last answer.
In a recent version of pygame, draw.rect was changed to give "actual rectangles." This has an advantage of looking cleaner in many situations, and the algorithm for them is now significantly faster, helping performance.
I actually talked to someone with your exact same issue (like coming from the same tutorial) on discord, and we decided to use a rect.inflate() call to grow the rectangle out before drawing it behind the text.
For example, you could do something like
pygame.draw.rect(screen, 'Pink', score_rect.inflate(10,10))
Instead of both Clear's rect calls.
Or if you want to preserve the slight corner rounding you could do
pygame.draw.rect(screen, 'Pink', score_rect.inflate(10,10), border_radius=3)
So this just uses the return value of a Rect.inflate call instead of the original Rect itself. Inflate takes an x margin and a y margin, and returns a Rect larger/smaller by those amounts, but still centered in the same location.
I have replaced a header logo image which was just text in an arc on the following website: Leeds Magic Circle
Disclaimer: I did not design or create this website I am just performing some small modifications to it.
The original image said "1919 - 2015" and needed updating, hence I chose SVG to replace it with a bit of javascript to update the date portion.
It looks good, however it doesn't scale down when the browser is reduced or viewed on a mobile device.
I need the SVG to fit the 800x116 which replaced the original image, but I need it to scale down too.
I am very new to playing with SVG and the answers on the web are somewhat confusing so hopefully someone here can help.
Also open to alternative methods to achieve this goal.
Thank you
Ok I am developing a game using Libgdx and everything was fine until I noticed that when my character moves, its texture becomes slightly blurred at the edges, as if it is blending in with the background in the android version. There seems to be a slight graininess to the image as well which becomes more noticeable when it moves. I THINK these problems might be related to texture filtering, but wanted to come on and ask here to see if anyone had experienced this before. Any insight appreciated.
EDIT: Here is an the image, you can see it's quite grainy on the whole. When it moves the graininess seems move, it is hard to describe, but it looks as if the pixels on the eater are moving relative to each other slightly.
The way I draw it is pretty straight forward the following is called in my render method:
idleTexture = new Texture(Gdx.files.internal("images/GreenGuy.png"));
spriteBatch.draw(idleTexture, x, y*ppuY,width*ppuX,height*ppuY);
All other work I look at does what I am doing, but I am not totally happy with the results. I have tried changing between linear and nearest filtering but this did not change anything. I have also tried just using a smaller image instead of shrinking a large one, but I still get the same problem of the pixels not remaining relatively static while the character is moving.
I am reading this tutorial about making draggable and resizable rectangles
http://simonsarris.com/blog/225-canvas-selecting-resizing-shape
It is a good one and I want to create a similar one using images and this is what I had done
http://jsfiddle.net/LUhsK/2/
all i had done is to change the script that instead of drawing a square I draw an image given the image source, initial X, initial Y, width and height but as you can see it doesn't work. I really can't find what seems to be the problem
If I clearly understood what you are searching for I guess it can be easily resolved with
droppedElement = ui.helper.clone();
droppedElement.resizable();
As a front-end developer, I've been given a mock-up design to implement. This design features several tachograph-style icons, which have me stumped as to the best way to mark them up in HTML and CSS.
The images look like the following:
Obviously these assets represent the empty state and the full state respectively.
My issue is this: how can I mark-up these images so that I can show varying levels of completion, i.e. 10% full, 60% full etc?
Waiting in anticipation to hear your answers.
I would seriously recommend looking into the Raphael javascript library. You can knock something like this up in just a few lines of code.
See also this question: Drawing a half gauge/speedometer (JavaScript Canvas or Java Swing Example needed) where I gave an answer including a four-line code sample using Raphael, which provides an animated fuel gauge. You'll need to tweak it for your design, but even then it's only going to be a few lines of code.
The great thing about using Raphael to draw things like this is that it is fully compatible with older browsers, even IE (as far back as IE6 if you need it), without you having to do any special code to support it. It's a great little library.
Hope that helps.
Given that the image reprisents actual data and isn't purely a design mechanism, I'd mark the image up as an HTML image.
<img ... alt="10%">
If your concern is about showing portions of the image, one way you could do this would be to set the image as a background to some container and use width and height to identify the amount of the image to show.
i'm not an expert on html5 /css3, but would you not use the html5 arc command to create a mask to reveal the full state.
As you have a 270 degree rotation from empty to full, you'd just map the value as percentage of 270 to create the value of the arc that would mask the appropriate value.
I believe that there is a java script Math.PI that might help to.