Programming related to the visual representation of information on computer screens.
0
votes
2answers
58 views
Show only part of an image
I have an image, and I've got some random 2D convex polygons, I need to show only parts of an image where those polygons are.
from:
to:
The number of polygons, the size of polygons and number ...
0
votes
1answer
42 views
Is it possible to display no white images/sprites when using the latest Android OS?
Was it okay to use Texture.setEnforcePotImages(false) in order to disable conditional width and height pixel size that requires power of 2? I'm planning to sell the game app at Google Play. I want to ...
6
votes
0answers
153 views
atmospheric scattering and sky geometry
I'm trying to implement an atmospheric scattering in my graphics (game) engine based on the gpu gems article: link. An example implementation from that article uses a skydome. My scene is different - ...
0
votes
1answer
70 views
How can I get my Android camera system working more like Google Earth's? [duplicate]
I'm implementing a touch screen interface whereby the user dragging their finger on the screen will rotate the camera in a sphere around the central point.
My code works well for the horizontal swipe ...
2
votes
1answer
123 views
How does the fragment shader get data from the vertex shader?
How can any interactions between these two shaders work? I mean the vertex shader sends a vertex's color to the fragment shader, but that's only one fragment, what about all the other ones between the ...
1
vote
1answer
74 views
What is the difference between shader uniforms and attributes in OpenGL?
I don't fully understand the differences between uniforms and attributes. To be honest, I probably haven't even used attributes.
Can uniforms change for each vertex? I mean to calculate the vertex's ...
1
vote
2answers
187 views
In GLSL is it possible to offset vertices based on height map colour?
I am attempting to generate some terrain based upon a heightmap.
I have generated a 32 x 32 grid and a corresponding height map ->
In my vertex shader I am trying to offset the position of the Y ...
4
votes
2answers
285 views
What Shading/Rendering techniques are being used in this image?
My previous question wasn't clear enough. From a rendering point of view what kind of techniques are used in this image as I would like to apply a similar style (I'm using OpenGL if that matters):
...
3
votes
1answer
43 views
Armature rest matrix - why does this exist?
I'm not sure I have a clear idea on what purpose the rest matrix/bindpose is supposed to serve in skeleton animation. If it is supposed to transform a bone into the rest pose and the mesh itself is ...
0
votes
0answers
24 views
Is there a transformation or set of transformations that can approximate a “radial scale”?
Is there a way to, with matrices, scale something as if someone were opening a Japanese fan? I'm at a loss of what to call it, so pointers towards avenues of research would be greatly appreciated. If ...
0
votes
0answers
112 views
Construct 2 JSON commands
I'm new to Construct 2 and trying to set up a connection with my own WebSocket server. I have communication both ways, but have not yet invoked action in response to input from the server. I currently ...
1
vote
0answers
67 views
How do you tell OpenGL ES 2.0 to use a texture as the depth buffer?
I want to render a scene with an outline post processing effect in OpenGL ES 2.0.
First I render all the opaque objects. Then I use a post processing shader
for silhouette detection that uses the ...
1
vote
1answer
144 views
Color grading, shaders and 3d textures
I'm trying to implement color correction with the 3d lookup table. The lookup table is actually just a 2d texture 256x16 and consists of 16 squares which one is 16x16.
When it comes to rendering, I ...
12
votes
3answers
628 views
Recreating this flat-shaded look
I'll keep it short. How does one achieve the effect depicted in the image below? Is it feasible to do in realtime? It looks deceptively simple, but it probably isn't. Are there any keywords I can ...
3
votes
1answer
84 views
Symmetry preserving path simplification
I'm using the Douglas peucker (DP) algorithm to simplify some (2d) closed paths forming a shape. This works pretty good, but not so much for closed paths that have some symmetry. Take for example a ...
3
votes
1answer
189 views
Automatic shadow for isometric objects
I have like hunderd of isometric objects. One example:
I'm trying to find a way to automate creation of shadow they're casting. I ended up with following transformation:
matrix.Shear(-0.25f, ...
0
votes
1answer
87 views
Tangent basis calculation problem
I have the problem with seams with calculating a tangent basis in my application.
I'm using a seems to be right algorithm, but it gives wrong result on the seams. What am I doing wrong? Is there a ...
-3
votes
1answer
190 views
OS X OpenGL 3.2 Core (Black Screen)
I want to render a Quad via VAO, IBO and VBO but nothing is drawn. I'm using glDrawRangeElements in OS X OpenGL 3.2 Core context. The screen is completely black without any error. GLFW3 is used to ...
2
votes
2answers
185 views
How can I actually understand Instanced Geometry Rendering - so that I can implement it the way I need it
I'm stuck trying to implement instanced mesh rendering in my project. Particularly because I am failing to understand how certain components actually function - and how the drawing routine is actually ...
1
vote
1answer
135 views
3D Reflection - Drawing Upside Down
After reading up on rendering reflections, it seems that the way to do it is the render the scene from underneath the plane of reflection, and then use projective texturing to map the reflected ...
7
votes
4answers
764 views
How are 3D models created in video games?
As the title says, how are 3D models in games designed and displayed? Is it all-code? Drawn on paper, then on a 3D graphics software, then... what?
Of course, game programmers won't define every ...
3
votes
1answer
348 views
Efficient foliage rendering with OpenGL
Rendering foliage usually involves "hanging" triangles and textures that have completely transparent areas. I'm interested in knowing how are these usually handled by a 3D engine.
The first thing ...
4
votes
1answer
189 views
How to optimize SpriteBatch usage?
From what I understand, SpriteBatch's purpose is to batch as many draw operations to send to the GPU. Each batch can handle one texture at a time, and changing SpriteBatch context/texture is ...
1
vote
2answers
90 views
SpriteBatch does not draw on graphicDevice
I'm using a control which is using XNA inside.
But when I try to draw something, it doesn't appear.
I already did a lot of tests but can't figure out what's wrong.
Here is the test I set up:
...
-3
votes
2answers
336 views
Newbie game programmer - Where do I start? [closed]
Okay, so I have been really inclined towards game programming this past few weeks. I have primarily been a web programmer and know a fair number of lanugages like PHP, Java, javascript, python, etc. I ...
6
votes
1answer
724 views
Most efficient way to draw vertex with OpenGL
I am writing an OpenGL 3D game. There will be tons of triangles for terrain and objects in use.
I am studying from the OpenGL official guide and the first presented method is to call a function ...
-1
votes
1answer
52 views
Reverting the view SDL
So in my SDL application, which I setup for OpenGL, if I were to do the following code:
glBegin(GL_QUADS);
glVertex2i(0, 0);
glVertex2i(50, 0);
glVertex2i(50, 50);
glVertex2i(0, 50);
glEnd();
The ...
3
votes
1answer
132 views
sprite animation individual framerate
When animating sprites I am taking the delta difference between frames and locking the rendering frame rate of the sprite animation to the delta time.
float delay = 1000.0f / FPS;
float now = ...
-2
votes
1answer
181 views
How to start graphics programming? [closed]
I'm trying to find a complete guide for OpenGL programming but all i can found is some blogs with non-finished lessons and old books.
I don't want to just make a game, i want to develop my own game ...
1
vote
1answer
148 views
Damage indicator screen overlay
I want to make something already done by a lot of games , which is when I am taking so much hits from enemy red screen drawn like the following , using XNA 4.0:
after it's drawn and I am still alive ...
1
vote
1answer
325 views
Jogl2 won't accept jogl 1.0 code - GL_LIGHTING and GL_LIGHT_MODEL_AMBIENT cannot be resolved or is not a field?
I'm trying to run my code on jogl 2.0 , for the first time (until now I worked with jogl 1.0) however Eclipse throws to almost every that I have a "cannot be resolved or is not a field" message .
...
3
votes
2answers
245 views
Screen effects and antialiasing
I have been working on a game for a while using glut for basic window creation.
I was rendering to an offscreen buffer so that I could implement various effects like screen bulging, motion blur, ...
1
vote
1answer
336 views
Selecting and moving object in OpenGL Gameplay3D Engine
I'm using Gameplay3d as a game engine to develop a simple board game. PEG Solitaire
I've come to the part where I've created a 2D grid for all the movable object, empty locations and also where it's ...
0
votes
2answers
158 views
Problem reseting device when using render target
How can I reset the device when I am rendering to a surface, and then stretching that surface to the back buffer. If i don't change the render target everything goes well, but when i change the render ...
3
votes
1answer
68 views
Matrix Translation Transformation Question
I've been reading a lot about computer graphics lately and because of it I'm building my own math library's for fun. I was reading about Matrix Translation and Homogeneous Coords, and was wondering ...
2
votes
2answers
506 views
Does my 2D OpenGL renderer need optimized?
I've started a game engine for learning purposes. I have successfully gotten an opengl renderer working and I can draw textures of varying sizes to the screen. The way I have done this is by creating ...
0
votes
2answers
149 views
Is it possible to push real-world, real-time data into Unity? [closed]
I'm pretty new to this, and I'm having trouble figuring out where to even look. If there's relevant terminology that'll be google-able, that would be a great help.
Suppose I want to have a monitor ...
0
votes
1answer
102 views
Can I use multiple OpenGL version together
I want to use GLSL but keep my current OpenGL 1.1 setup. The thing is that can I use OpenGL 2.0 shaders on OpenGL 1.1 renders?
2
votes
0answers
234 views
Can I use a shader with 2 different textures in Cocos2D (x)?
We are evaluating a variety of different graphic engines for use in our game and we want to be able to use 2 different textures for many of our sprite maps. One sprite map would be the standard RGBA ...
2
votes
3answers
366 views
How can I load 2D texture data without a GraphicsDevice instance?
We have a client/server architecture for our game with the client being the XNA Game, and the game server is separate and only references XNA. They both use a shared DLL for networking. The game ...
1
vote
1answer
83 views
Dealing with field of view when zooming into a terrain from a height
I'm creating a tech demo featuring a small planet. The problem I'm having is that the planet doesn't really feel like the right "scale" when the camera in down on the surface, I think it could be the ...
1
vote
0answers
59 views
Another Question from the Image Efficiency for Memory Handling
At this topic, "Which image format is more memory-efficient: PNG, JPEG, or GIF?", one of the fellow Game Development community @Panda Pajama told about the complex concept about image memory handling ...
47
votes
5answers
6k views
Which image format is more memory-efficient: PNG, JPEG, or GIF?
Which image format is more efficient to save memory? PNG, JPEG, or GIF?
0
votes
1answer
300 views
Box2D and Slick2D: Graphics bug [closed]
The bug
The physics ground represented by a horizontal line. The object is stationary, and seems to be pretending that the ground is lower. This is because the center of the Shape is incorrectly ...
1
vote
1answer
70 views
Drawing sprites messes up my model in XNA4
I have a model which draws correctly in XNA4.
However if I try to add a background image (or any sprite), the rendering of my model is messed up. There are two problems with the rendering
model is ...
0
votes
1answer
127 views
Tile Draw Order
I started working on a tile engine recently and have been trying to get this depth sorting for the tiles right. I am using XNA and the SpriteSortMode.Deferred to get the tiles to sort correctly in the ...
1
vote
0answers
219 views
How to draw a large number of model (identical) with vertex buffer in XNA?
I am facing a problem that many developers as have probably found a solution.
I have a small project with a floor designed with small cubes (100X100).
If I exceed this limit, my game suffered major ...
0
votes
0answers
55 views
What could cause dispersed triangles instead of integral model?
So the thing is, I get dispersed triangles instead of model that I'm loading, in this case it's just a cube. It seems as those triangles have no points that connect them. Is there anyone who had this ...
-3
votes
4answers
2k views
Starting to make 2D games in C++ [closed]
I'm fairly experienced with C and C#, but I've only ever created console/windows applications. I'm also experienced with AS3 and I've made some flash games.
I want to make proper 2D games in C++, but ...
11
votes
3answers
1k views
How do I scale down pixel art?
There are plenty of algorithms to scale up pixel art. (I prefer hqx, personally.) But are there any notable algorithms to scale it down? My game is designed to run at a resolution of 1280x720, but if ...
