i need to create a switch over cocos2d scene. i can create a uiswitch and add it to scene but
i really interested in cocos2d switch if there is any....
can anyone give me any idea??
If you compile and run the cocs2d test applications included with cocos2d there are several tests that use controls like a switch or a slider. Then you can look at the test files and see how they implemented.
Best way I have been learning cocos2d is by reviewing the test apps.
Also check out these posts for several other useful resources:
https://stackoverflow.com/questions/2293457/cocos2d-resources/4061868#4061868t
Need 2D iPhone graphics designed
Related
I wonder if I can write my own native module, render something with using OpenGL in C++ and finally display rendered picture on react native side ( by simply using component).
If so, can I use that to render an animation in for example 60fps?
My case is that I've got the custom, let's say, game renderer written in OpenGL, and I looking for some fancy solution to create an editor detached from engine code.
I've already analyzed some react-native video libraries and I've discovered that frames are injecting as the texture of components, but I'm not sure is it the best solution (I can't find any documentation of those low-level mechanisms in react native).
Any advice? Thanks in advance!
I am trying to make a simple QT android app, but basically my problem is that on my main screen I have about 250 little images that i want to scroll. But I really need the scrolling to be fluent and fast. First I tried it using QML but it wasnt really fast, then I tried to make the app in qt designer and use widgets but that was very slow. Then I tried using openGL but on android I can only use openGL ES and I cant find so much examples because every example that I find is much more advanced than I need.
But basically my main question is, what do you think is the best way to solve my problem and if its openGL which way of using it is the best that could solve it?
Thank you.
Neither approach should have problems when scrolling when compared to a native application on the same device. Check the following:
Make sure to measure performance only in release-builds, with QML debugging disabled and no debugger attached.
Maybe your device simply can't keep up with so many images in one view - then it's not a Qt problem. Compare with a 'native' java-App to see if this is the case.
Check if you implemented everything correctly; e.g. check if theres anything running in your main-loop or some events happenening repeatedly which consumes CPU time
And some more general advice:
Downscale your images to the appropriate view-size before giving them to the UI, as they might have to be re-scaled on every frame-update and/or consume graphics memory otherwise. E.g. dont set the source to a 1024x1024 image when it's going to show in a 64x64 view
Remove transparency from the images if they are going to display on solid-colored background anyway.
Dont overlay the images with other widgets/controls
If you're still getting a 'slow' UI, maybe try to merge all or multiple images and their surrounding UI/Controls into one or more bigger images
Very long views are not user-friendly. Maybe implement a pager or tab-view etc. to divide your list into multiple views. This way you can also decrease load-time
Dont try to implement an interface in openGL yourself. It's unlikely you'll make a better one than you already get with QtWidgets and QtQuick.
I am using glui to add a control panel to my OpenGl code. This is a visualisation interface for a large scale simulation platform written in C++.
I was wondering if it is possible to make changes to the background colours of the panels?
If this is not possible, can anyone comment on how slower my display will become if I switch to using pyQt with OpenGL? And would it be possible to access information on my C++ classes and display them with a pyQt approach? (I am happy to make this a second thread if you think it is better that way.)
For background color change of glui-based panel, its not clear what you are asking but I don't see why it would not support such a basic op. Update: I would try using glClearColor like on that link.
For speed it really depends on what and how you're going to use opengl: see pyopengl: Could it replace c++? for a good discussion.
For using your c++ from python this is usually relatively easy by using SWIG (swig.org). You tell SWIG what parts of your c++ api you want to access from python and SWIG generates the code to make your c++ available as a python module.
As a hobby, I've been working on remaking an old video game, and I want to avoid reinventing the wheel where possible. The game is heavily GUI-based, but the GUI needs to be customized in terms of look-and-feel, and also needs to work with 3D OpenGL rendering for a few game screens.
To give you an idea, here's a screenshot from the initial prototype:
There's a lot of animation used, and 3D also, but the GUI widgets behave much the same as in a standard desktop application.
Thus far, I've been using my own GUI library (it's not robust or complete, and I've been running into some problems).
I've been considering migrating to Qt given it's reputation and impressive features, and some of the nice screenshots on the Qt website. But I've never used Qt before, so I don't really have an idea of what it's capable of, or what kind of time investment would be required to learn it. (Note I've used FLTK).
My question is: would it be possible / practical to use Qt in this situation?
UPDATE: After mocking up some game screens in Qt, I've decided not to use it. While it supports many of the features I need out-of-the-box (particularly through Style Sheets), I need to support custom bitmap-based pre-rendered fonts (I can't convert/replace them). And I can't subclass QFont, or reimplement it without it breaking in future Qt releases. That said, I was extremely impressed with Qt (both in its ease of use, and good documentation). I will be borrowing some of its features for my own engine. Thank you to all who provided input.
It's hard to know everything your game needs to do based on a screenshot; however, I will echo the sentiments of other posters here and provide a couple of avenues for you to look at.
One, is that you might want to consider QtQuick over the GraphicsView Framework, but this REALLY depends on what you need to do. I just want to throw it out there as an alternative so you don't miss it. This tutorial uses QtQuick to put together a really slick looking connect four style game. This may be more simplistic than what you want to go for, but then again, maybe it isn't, it depends on what you need to do.
Second, before writing custom paint events for all of your buttons, I would consider using Qt Style Sheets and style your widgets in a CSS like syntax. This will allow you to change the look and feel of your GUI in a very flexible way really quickly. Based on your screenshot, I think you can get what you want out of style sheets much faster than subclassing and rolling your own setup. But once again, it's hard to know based on one screenshot. Here's an example of a dark and orange GUI that was implemented using only Qt Style Sheets. The border-radius property of QPushButton's style sheet would give you the rounded buttons (ref).
The simple answer has been given above but to throw some more thoughts in: yes it's possible, you probably won't need to fight against Qt too much. For the most part the recommended advice for going to heavily customised widgets like that is subclass and implemented the paint event yourself.
You can then use a load of basic drawing primitives to get the basic shapes for the elements and expand from there. There's actually a couple of questions on here with really good resources about how to do it.
So, I'm going to develop a Pac-Man clone with Qt. The problem is that I do not really know where to start.
I quickly take a look at the documentation and some demo. I also downloaded some game sources on qt-apps.org. And it seems that there is a lot of ways to develop a game with Qt!
In your experience, which part of Qt should I consider to develop a Pac-Mac clone ?
The Animation Framework
The Graphics View Framework
The Paint System
Qt Declarative
Any help would be appreciated.
I think that QGraphicsView framework is the best way. Create a QGraphicsScene, some QGraphicsItems for the elements of the game. You have collision detection for free.
Most of KDE games are based on the QGraphicsView framework. It is a good fit for simple game development.
I'm currently working on a project providing gaming-specific Qt Quick Components for cross-platform game development, might be of interest: http://v-play.net :)
At the very minimum you will want to look at QGLWidget. You can get an OpenGL program up in a few minutes by deriving from QGLWidget, it will create the window, context, handle mouse and keyboard input, etc. Create a QTimer to trigger updateGL() every 10-15 ms or so and your good to go. I think there is a demo somewhere for setting this up, but it has been awhile since I saw it.
If you want to embed widgets into the window, I would look at QGraphicsView. There is a demo of this called boxes. Just beware the demo is a tad hard to learn from as several classes are thrown into the same file and it might take a few moments of tracing to figure out where the flow is.
Since you are doing a 2d game, you might want to look at using QPainter on top of OpenGL. This allows you to draw primitives easily instead of doing them with OpenGL calls. I never could get this to stop flickering in fullscreen though.
There's a book about game development in Qt here, it's a bit old, but it might give you some ideas. But IMHO, Qt is widget based and is a bit slow for a game, you might consider using SDL or OpenGL.
I'm developing a simulation of rigid bodies with Qt and OpenGL using the PhysX API from Nvidia. If you want to see this approach, look at my project at github: http://github.com/lucassimao/Simulacao-Estereologica
Well, one place to look could be the Gluon game development framework, which is currently under development. It depends on what you're really aiming for with your PacMan clone, but Gluon may well be what you're after: https://github.com/KDE/gluon
If anyone else is interested in learning how to make GAMES using C++ and Qt, have a look at my YouTube tutorial series. It explains the graphics view framework through a series of videos which build upon a single game that we start in tutorial 1.
C++ Qt Game Tutorial 8 - Adding Graphics
If you are not comfortable with Qt yet, then I REALLY loved VoidRealm's Qt tutorial series, also on youtube (C++ Qt 1 - Introduction to QT programming).
A good start would be:
Qt Examples And Tutorials
Perhaps if you need to cheat you may want to look here
xpacman.tar.gz