Tagged Questions

1
vote
0answers
76 views

How to implement a multi-platform Java 2D game engine's graphics?

I'm not sure whether this question should be posted here. I'm trying to make a basic generic game engine in Java. Here's what I have so far. public abstract class Device { public abstract void ...
0
votes
0answers
69 views

Android OpenGL ES 2.0 gameloop problems

I implemented a gameloop found here: http://www.koonsolo.com/news/dewitters-gameloop/ into my OpenGL ES 2.0 Android game. The tutorial was written with the canvas API in mind, not OpenGL so I made a ...
8
votes
1answer
307 views

How to reduce image size without pixelation?

I see lots of games with smooth edges characters and high res images, however when I try to reduce images to say 64x64 for my character I just get a pixelated mess. even if I start with a 64x64 canvas ...
-3
votes
0answers
51 views

How to animate the Tilemap object in Libgdx? [closed]

I am facing problem to animate or move the object(Cell) of Tilemap??? Is there any solution for this???
0
votes
0answers
107 views

graphic effects of Android game “Achtung” [closed]

I would be very gratefull if someone can give me a hint how the graphic effects of this android game ( http://www.isignz.nl/achtung ) works. Let us let this "pixie dust"-stuff aside for the moment; I ...
5
votes
1answer
63 views

GLImpl.gldrawelements longer than usual

I'm developing a little game engine for the Android platform and I'm trying to improve the performance of this one. (I'm not an OpenGL expert) I can see a framerate drop sometimes, when using DDMS ...
0
votes
1answer
122 views

Using compressed(ETC1) textures in LibGDX

I use standard android tool for compressing PNG texture and archiving it with gzip: /android-sdks/tools/etc1tool texture.png --encodeNoHeader gzip texture.pkm Then I try to load it: FileHandle ...
0
votes
2answers
334 views

Drawing Sprites in Android OpenGL efficiently?

I want to basically give myself some sprite drawing functions (making use of openGL) such as; draw(Texture,x,y) I want to do this using OpenGL-ES 2.0 on Android. Since the textures can be varying ...
0
votes
1answer
81 views

Devices or Smartphones That Can Run and Displayed Images Properly While Power of 2 Code is Disabled

Before making game apps, I want to have any certain smartphone device brands that runs on OpenGL. I have to make a code for images that doesn't need to required power of 2 images so that I can resize ...
1
vote
2answers
703 views

How to draw a smooth circle in Android using OpenGL?

I am learning about OpenGL API on Android. I just drew a circle. Below is the code I used. public class MyGLBall { private int points=360; private float vertices[]={0.0f,0.0f,0.0f}; private ...
2
votes
2answers
450 views

Move Camera Freely Around Object While Looking at It

I've got a 3D model loaded (a planet) and I have a camera that I want to allow the user to move freely around it. I have no problem getting the camera to orbit the planet around either the x or y ...
2
votes
1answer
283 views

Texturing a Sphere in libGDX

I created a sphere (planet) with a texture (earth texture) in Blender, and exported it using the G3DT exporter. Then when I go to use it in my application I convert to the G3D binary format, and load ...
2
votes
1answer
225 views

Rendering multiple squares fast?

so I'm doing my first steps with openGL development on android and I'm kinda stuck at some serious performance issues... What I'm trying to do is render a whole grid of single colored squares on to ...
1
vote
1answer
224 views

What's the recommended way of doing a HUD for an android game?

Basically the question is in the title. I'm creating a RTS game and I will need buttons like attack move / attack ground, etc. I am not using any engine. When people do games in OpenGL for android ...
1
vote
2answers
284 views

Which one have to use Canvas or Open GL for 2D game in Android

I am compleatly new to android gaming.I want to develop a 2D game with some physics in it.I want to know which one i have to use Open GL or Canvas and the reason for selection I want to include a ...
0
votes
2answers
1k views

I have created character human in blender. How to use it in Java/Android

Title says it all pretty much. I can't find anything online which explains it in details. I have created a character model in Blender and I want to use it in Android app. I want to make it move. ...
3
votes
1answer
518 views

Weird error with opengl in Android using Libgdx : “EGL_BAD_ATTRIBUTE”

I am having a weird error when uploading my game in the phones. E/Adreno200-EGL(5128): qeglDrvAPI_eglGetConfigAttrib:484>: EGL_BAD_ATTRIBUTE I am uploading the textures with AssetManager. I am ...
6
votes
3answers
675 views

Started game development no idea of computer graphics. Should I learn tools or concepts?

I am in 6th semester of my Computer science bachelor degree program, Working as Intern in a start up company. I started game development using AndEngine, things are going good because I have good hold ...
2
votes
2answers
229 views

Ray Picking: how can I find which copy of model to pick, if they share the same vertices, but each one is translated before being drawn?

I have a scene, in which I am drawing few different objects - each one has the same vertices and each one is translated to proper place before being drawn. While using libgdx (but I think that this ...
-2
votes
1answer
280 views

What are some good resources for learning OpenGL on Android? [closed]

Mainly I learned how to develop Android applications, but now I want to know how to make high resolution games, so does someone have a good book or a video that teaches OpenGL?
1
vote
1answer
664 views

update positition data: change vertex buffer or matrix?

I am writing a small 2D SHMUP for Android at the moment. Pure 2D rendering with Bitmaps turned out to be a bit too slow, especially with a lot of alpha blending going on. So I decided to switch my ...
1
vote
2answers
263 views

Simplified trajectory equation to identify Time Taken(t) by a protectile to travel Distance(d), under gravity?

I am building a game, where I have to plot a trajectory of a ball in 3D space, launched with an inital velocity Sx, Sy, Sz. [I am using OpenGL and Android-NDK] Lets assume Sz is always 0. And Sx ...
0
votes
2answers
372 views

Help with Meshes, and Shading

In a game I'm making in LibGdx, I wish to incorporate a ripple effect. I'm confused as to how I get access to the individual pixels on the screen, or any way to influence them (apart from what I can ...
0
votes
2answers
630 views

How to draw lines between user draggable points?

I want to create a triangle using three different points on the SurfaceView using OpenGL. Line indications between the points with one color and fill the triangle with different color. I want to pull ...
4
votes
3answers
6k views

glTranslate, how exactly does it work?

I have some trouble understanding how does glTranslate work. At first I thought it would just simply add values to axis to do the transformation. However then I have created two objects that would ...
7
votes
2answers
432 views

Does use of simple shaders improve performace/battery life?

I'm making OpenGL game for Android. Till now i've used only fixed function pipeline, but i'm rendering simple things. Fixed function pipeline includes a lot of stuff i don't need. So i'm thinking ...
3
votes
1answer
414 views

Is continuous loop best idea for Android OpenGL game?

I've done some small OpenGL games for computer. I've used continuous loop (with VSync) for game life cycle, input - update - render. Now i'm going to write simple game for Android, but i'm wondering ...
0
votes
1answer
1k views

Texture displays on Android emulator but not on device

I have written a simple UI which takes an image (256x256) and maps it to a rectangle. This works perfectly on the emulator however on the phone the texture does not show, I see only a white ...
0
votes
1answer
183 views

How to implement physical effect, perspective effect on Android

I'm researching about 2D game for Android to implement an Android Game Project. My project looks nearly like PaperToss. Instance of throwing a page, my game will throw a coin. Suppose that I have a ...
2
votes
1answer
593 views

OpenGL ES drop shadows for 2D sprites

I've got a an OpenGL scene rendered with a bunch of sprites, and I'd like to automagically add drop shadows to all of them. Here's a picture showing what I mean: The scene uses orthographic ...
3
votes
4answers
2k views

OpenGL gradient banding on Samsung Galaxy S2 Android phone

I've got a live wallpaper out on the market which uses OpenGL to render some basic shapes and a flat plane. The simple lighting creates a gradient effect across the plane, which looks fine on most ...
-1
votes
1answer
816 views

How to make Moving road/track for android game?

I am very much new to Android game development. and i have little idea about the canvas and open GL. in one of my requirement i wanted to draw a moving road/track(Jazzy). how should i start. please ...
0
votes
1answer
1k views

android game using bullet and libgdx

i'm developing a android project for school and i'm currently using libgdx for rendering. It performs quite well, but it lacks a 3d physics library. So i searched and found that Bullet physics engine ...
1
vote
1answer
431 views

How can I place a ProgressBar in Android using Cocos 2d?

I want to place a horizontal progress bar in my Android application and I want to change its progress color. I used the following code, but the progress bar is not being displayed. CCProgressTimer ...
1
vote
2answers
483 views

How can I disable/dim the screen when I click the pause button?

I am working in an android game using cocos2d. I want to dim the background screen when I click the pause button. How can I do this ?
1
vote
2answers
2k views

What is an appropriate OpenGL(ES)-based game engine meeting these criteria?

I want to try my hands on a little shooter on the Android platform, and I'm looking for a full-featured 3D game engine. I can't afford to pay more than 400 € for a license, so expensive engines are ...
2
votes
2answers
1k views

What is an efficient way to deal with large, scrolling background images?

In my mobile game you basically you just fly up (infinite height) and collect stars. I have many quite large background images, scaled down so that their width is the same as the device width. Then ...
1
vote
2answers
426 views

Android BitmapFactory.decodeStream loading BGR format?

It is very odd.I want to load .png file via asset manager which is provided by android sdk. AssetManager manager; /........./ BitmapFactory.decodeStream(manager.open(path)); It returns ...
0
votes
1answer
476 views

Opengl scrolling world guidance

I'm looking for a tutorial about how to implement a horizontally scrolling background with various objects that auto-scrolls as your character/player moves just like various car/motorbikes games. ...
1
vote
1answer
952 views

How should I structure my Android platform board game?

I'm new to developing Android games, but not new to developing mobile games (J2ME). I'm currently developing a board game, for a school project, with 2 things - a board and a spinning wheel (both are ...
9
votes
2answers
6k views

OpenGL ES 2.0 Point Sprites Size

I am trying to draw point sprites in OpenGL ES 2.0, but all my points end up with a size of 1 pixel...even when I set gl_PointSize to a high value in my vertex shader. How can I make my point sprites ...
4
votes
2answers
211 views

How can I determine a budget for RAM used (LRU involving VRAM, in particular)

After some profiling, I've determined that one of my most expensive functions involves drawing text. As a solution, I'd like to implement a LRU type of cache that will "remember" the vertices, tex ...
3
votes
1answer
8k views

Loading PNG textures for use in Android OpenGL ES1

I'm very new to Android and OpenGL coding (I have previously used ogre3d). I am trying to find an efficient way to load PNG textures. It is currently taking around 8 secs to load 3 512x512 textures ...
1
vote
2answers
381 views

OpenGL ES multiple indices

I need suggestions for the best method of acheiving what I am trying to do: -Using either OpenGL ES 1.x or 2.x I need to pass a bunch of vertices to the GPU. Each one has 3 attributes: Position, ...
1
vote
1answer
422 views

OpenGL ES indices optimization

I am using OpenGL ES 1.x/2.x I have 2 attributes to be passed to the GPU(one is colors, one is vertices, one color per vertex). I use indices. Both attributes will use the same indices array This ...
9
votes
3answers
10k views

Fastest way to draw quads in OpenGL ES?

I am using OpenGL ES 2.0 I have a bunch a quads to be drawn, would love to be able to have to pass only 4 vertices per quad as if I were using GL_QUADS, but basically I just want to know the best way ...
3
votes
2answers
757 views

Which 2D rendering algorithm is the most suited for mobile devices?

Which 2d rendering algorithms are popular for mobile game engines (specifically Android) and why? Are the same ones for the desktop and/or console world as effective here?
14
votes
2answers
5k views

How many threads should an Android game use?

At minimum, an OpenGL Android game has a UI thread and a Renderer thread created by GLSurfaceView. Renderer.onDrawFrame() should be doing a minimum of work to get the higest FPS. The physics, AI, ...