I m just a little surprised but It looks like on firemonkey there is no easy way to draw a single point on a Canvas? or I m tired and I miss something?
As many ask me, below a sample of what I want to achieve (I want to also make a dynamique animation and move each dots on the fly)
Related
As you can understand from the title of this question I am trying to achieve fill animation of CALayer(CAShapeLayer) of SVG file.
How complex should be animation you can see from the images I attached.
I decided to start just with a circle and animate it to fill a layer below. Everything works pretty well.
So, I started building UIBezierPath or something like that but it looks like I am going the wrong direction.
I would really appreciate if you can just give me different ideas how to achieve it.
For SVG I use SVGKit. Maybe by using these set of classes, I can do something.
Thank you!
Although I am quite experienced with most frameworks in iOS, I have no clue when it comes to 3D modelling. I even worked with SpriteKit, but never with something like SceneKit.
Now a customer wants a very ambitious menu involving a 3D object, an 'icosahedron' to be exact. I want it to look something like this:
So I just want to draw the lines, and grey out the 'see-through' lines on the back. Eventually I want the user to be able to freely rotate the object in 3D.
I already found this question with an example project attached, but this just draws a simple cube: Stroke Width with a SceneKit line primitive type
I have no clue how to approach a more complex shape.
Any help in the right direction would be appreciated! I don't even need to use SceneKit, but it seemed like the best approach to me. Any other suggestions are welcome.
to build an icosahedron you can use SCNSphere and set its geodesic property to YES.
Using shader modifiers to draw the wireframe (as described in Stroke Width with a SceneKit line primitive type) is a good idea.
But in your case lines are not always plain or dotted — it depends on the orientation of the icosahedron. To solve that you can rely on gl_FrontFacing to determine whether the edge belongs to a front-facing or back-facing triangle.
Ok, I'm not quite sure if this is something I can ask here so no need to shoot me down. Just tell me and i'll delete the question :)
I had this idea of making my own clock using a touch screen and program it myself.
While thinking about this I thought of all these different styles to show the current time.
Of all the styles I came up with there was one that I found the most fun which is a clock displaying the time Rorschach style. And no not just a random smudge and guess what time it is but more like Rorschach in watchmen.
He has a mask with inkblots that constantly change shape (really cool if you ask me).
So what I had in mind is inkblots that change shape according to the digit it represents.
When the time changes
12:49:58 -> 12:49:59 the 2nd second digit will transform from 8 -> 9.
So now back to the original problem:
Before attempting to get this type of clock running I want to try to give a blob a certain shape and make it transform into another shape.
I searched on google but without any luck so I was hoping there was someone here that could point me in the right direction for making a random blob and transform it into another shape in an animation.
For example:
Draw square -> animate to circle
Any tips and tricks are welcome :)
In order to get the most simpliest animation of digit transformation you could store all posible digits in one image (verticaly) and then only partially show that image in your component. So when you want to do transformation between one digit to another you simply slide the image up and down.
Now if you are using FireMonkey you could create a 3D viewport and inside it create a cylindical object onto which will you render your texture with digits. So now you only rotate the cilinder in order to show the corect digit.
I'm trying to create something like this:
I looked many resources for that, but I still don't have idea how can I do it. Using CoreAnimation, Quartz2d or UIBezierPath I can draw a circle, but how can I draw a nice diagram with touch gesture's aid, using that? Maybe I wrong searched? If any tutorial, or sample code for this issue?
Best and easy library I used to draw pie chart with animation; MIM Chart Library for iOS
https://github.com/ReetuRaj/MIMChart-Library
Open source.
OK, CoreAnimation is not what you're looking for with this.
Anyway...
If you want to make a nice Pie Chart then you should take a look at CorePlot.
It has a lot of graphing functions and pie charts are in there too.
You can still animate with this you just need to update the percentages based on touch. Don't try to animate the sections of the circle. Change the percentages and update the circle.
Looks like you are trying to do some charts & plotting. If that is so, there is something called as
Core Plot
ILGraphics
OVGraphView
Some controls as well
Hope that helps.
I understand that I have to draw everything in draw(), and it's looping continuously.
But I don't want to draw texture again and again, for example I want to create a texture, draw something to texture (not spritebatch). than I will only draw that texture in draw().
Is it possible?
What can I use?
You have to draw again and again, as in short, if you dont it wont show. A wise man once wrote in a windows development book
Ask not why the text on your windows has to be constantly drawn, ask why it never used to be in DOS/Unix command line.
If something is placed over the area you're drawing too, and you dont redraw it, it just simply wont be there. You need to keep drawing it for it to be sustained on screen. Its done very quickly and wont hurt anything (especially if you're thinking in terms of background)
Not drawing it again is a performance optimisation. You should only do that if you really need to.
If you do need to do this, create a render target, draw your scene to the render target, and then draw your render target to the screen each frame (using SpriteBatch makes this easy) instead of your scene.
Take a look at this question about caching drawing using render targets.