A physical point in an image or the smallest addressable element in a display device.

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1answer
51 views

How to use traditional pixel coordinates system in OpenGL? (with C++/SDL2)

I find the normalized, centralized coordinate system used in OpenGL weird and annoying, is there anything I can do at all to make it work like normal pixel coordinates on everything ever except ...
0
votes
1answer
44 views

Algorithm to fill a shape defined by 4 pixel points?

I'm developing an application in Unity3D where a user can define 4 pixel points on screen, and what I would like to do is fill this shape with pixels using Unity's SetPixel. While I can do this ...
0
votes
0answers
40 views

How to improve textmesh quality?

In my game I using textmesh, but textmesh has a pixel problem even adjusting scale, character size and font size. How to solve it?
0
votes
1answer
102 views

SDL pixel access very slow

I'm using SDL and need to plot pixels one by one on the screen. When I do this, it's extremely slow. I followed the tutorial here: http://www.programmersranch.com/2014/02/sdl2-pixel-drawing.html ...
2
votes
1answer
162 views

Is there a way to manipulate a pixel Array on the GPU?

I'm currently working on a 2D-Game and i want to draw and calculate the whole screen myself through a pixel array. I'm programming in C++, using SDL 2 and OpenGL specifically a OpenGL Texture which is ...
0
votes
2answers
109 views

Colour values of a pixel array from a spritesheet image wrong (C++, SDL2)

So basically what i want to do is create a 2D tile based rendering system in C++ that renders each pixel on the screen manually. Rendering an individual pixel on the screen works just fine (or render ...
0
votes
2answers
66 views

How to determine areas of pixels of different colors or luminosities?

I want to create a program that determines all the areas of a given picture that have a different color, or the same color with different luminosities. Are there known algorithms that do this job ? I ...
0
votes
1answer
228 views

Rotating and scaling textures built up of pixel arrays in java?

I'm making my first real game, in Java, and I'm currently working on the base system, for rendering images (sprites) and I wonder how I can rotate sprites. My sprite class looks like this: ...
8
votes
6answers
3k views

How do you move a sprite in sub-pixel increments?

Pixels are either on or off. The minimum amount you can move a sprite is a single pixel. So how you make the sprite move slower than 1 pixel per frame? The way I did it was to add the speed to a ...
9
votes
2answers
486 views

How do I perform an xBR or hqx filter in XNA?

I'd like to render my game scaled up with one of the hqx filters (hq2x, hq3x or hq4x) or an xBR filter in a shader. How can I do this in XNA 4.0 and SM3? Side note: this question has been heavily ...
0
votes
2answers
55 views

Getting a color value from a coord

My goal is to get a RGB value of a pixel based of off a X,Y coordinate. I have been working on AIs for a small project attempting to make a bot that can pass through a maze. I want to get the pixel ...
0
votes
2answers
216 views

How big should my tiles be for tilemaps?

I'm creating my first tilemaps. Tutorials usually do 32x32px (example), but this tutorial did 128x128px, which made it easier for me to see without zooming in so much. In tiled, I did a 40 x 40 tile ...
0
votes
1answer
70 views

Which gaming engine can be used for pixel manipulation? [closed]

Here is the gist of where I am going with this. I work for a printer company and basically all of our input files(or output files for virtual printers) are bitmap files. We currently have a tool built ...
7
votes
2answers
2k views

Java single Array best choice for accessing pixels for manipulation?

I am just watching this tutorial https://www.youtube.com/watch?v=HwUnMy_pR6A and the guy (who seems to be pretty competent) is using a single array to store and access the pixels of his to-be-rendered ...
2
votes
1answer
237 views

How to smooth the model/texture look from a distance?

(First of all, I really didn't know how to title my question so it tells exactly what I mean so if anyone has a better title feel free to edit my question or leave a comment.) Look at the water in ...
0
votes
1answer
325 views

How do I implement pixel-exact collision server-side?

Recently I made a 2D offline game with HTML5 Canvas and JavaScript. I'm detecting collisions by first checking whether image bounding boxes overlap. If they do, I check against the bounding boxes, ...
0
votes
1answer
994 views

Adding Screenshots Specifically For 4-inch, 7-inch, and 10-inch Screen

My boss invited me and assigned me now as publisher for the app in Google Play. I have a 7-inch Google Nexus 7 tablet to take screenshot of any one of my sample projects I've made and post and upload ...
0
votes
1answer
294 views

Drawing UI using density pixels

I have a question about proper ways to draw UI, since I've learned what I know from the internet and by experimenting I often dont code the "proper" way, instead I do it my own way, not knowing if it ...
3
votes
1answer
357 views

Getting the rightmost point of gameobject

How do i determin the point on a gameobject that is most to the right (highest x value).
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vote
2answers
1k views

How can I rotate a bitmap without D3D or OpenGL?

I've just figured out on my own how to scale a portion of a bitmap using PutPixel. I would like to know the mathematical theory behind rotating a bitmap on my own, using per-pixel operations like ...
2
votes
1answer
377 views

How does the Direct3D 9 rasterizer determine triangle coverage?

I'm working on a software rasterizer to use in my project. I have implemented one that works well, however, often my rasterizer under or over estimates triangle coverage. I need perfect emulation of ...
1
vote
2answers
298 views

How to draw a rotated pixel perfect line by hand?

If you have a pixel perfect line like 1:16 pixels, and you want to draw that same line rotated by a degree, for example 45°, what would be the correct way to do that by hand? I know it should have ...
12
votes
1answer
12k views

Can Unity 2D be used to make pixel-art games?

I'm looking at the new 2D features introduced in Unity 4.3, and I think I might be missing something. To me it looks like they are designed for high-res 2D games, where scaling the sprites is ok, but ...
4
votes
4answers
11k views

How do I scale up pixel art without blur in GM Studio?

I'm creating a game in Game Maker Studio that uses pixel art. When I launch the game, all scaled-up textures are really blurry. (It doesn't happen to small ones.) For example, this image renders ...
1
vote
2answers
909 views

RGB values from image into a one dimension array in c# [closed]

I was wondering if there is a was a way to read rgb values from an image into a one dimensional array in C#. If it doesnt make sense, in java I would do something like this. int[] pixels; ...
1
vote
2answers
215 views

Easy Method to Change Color on UI Elements

This isn't a language-specific thing as far as I'm concerned. I was wondering what may be a quick way to change the COLOR of a certain on-screen element such as a button and its associated text. I ...
2
votes
1answer
2k views

How do I access the pixels of an SDL 2 texture?

How exactly can one get to the RGBA pixel arrays of SDL 2.0 textures? Does the texture need to be specially initialized and locked down?
2
votes
1answer
100 views

Expandable player boundaries

I'm trying to plan how to implement non-fixed boundaries so the player can expand their controlled territory without using a tiled based system. Each pixel can be fought over for who controls it. I ...
4
votes
1answer
284 views

Drawing different per-pixel data on the screen

I want to draw different per-pixel data on the screen, where each pixel has a specific value according to my needs. An example may be a random noise pattern where each pixel is randomly generated. ...
9
votes
1answer
5k views

GLSL Light (Attenuation, Color and intensity) formula

I'm implementing point lights in my Voxel engine, and I'm really struggling to get a good flow of light, from 100% near the light source to 0% at the light radius. I have 5 arguments for the ...
1
vote
1answer
236 views

Texture Shaders vs. Pixel/Fragment Shaders?

My question is a simple one. Functionally, practically, and performance-wise, what are the differences between using a D3DX Texture Shader, and using a Pixel/Fragment Shader rendered with a full ...
3
votes
1answer
286 views

Making up everything from single pixels

I recently saw a game which looked a bit like minecraft, but it was a RPG. The enemies in this game consist completely of voxels and if they die, they collaps and every single voxels falls down, ...
4
votes
1answer
1k views

2D Software Lighting Issues in Java

I'm creating a 2D top-down tiled game in pure Java and by now I'm trying to implement a way to do lighting. First, some details on how I render: there is a screen class which handles all the ...
1
vote
1answer
172 views

Application design for specific points on image

Hi guys I am starting a simple hobby app in Unity, its a 2D app, which have some alphabets like A,B,C..Z (images) . There ll be specific paths where user touch one by one to complete drawing the ...
12
votes
3answers
1k views

How can I replicate the color limitations of the NES with an HLSL pixel shader?

So since 256 color mode is depreciated and no longer supported under Direct3D mode, I got the idea to use a pixel shader instead to simulate the NES palette of all possible colors so that fading ...
0
votes
3answers
248 views

help using image to overlay grayscale around player

I'm sorry for the confusing title but it is hard to explain in one sentence. This is what I have What I want to do is use that black overlay to convert everything in the black area to grayscale. ...
0
votes
1answer
262 views

Is it possible to render part of the screen in different pixel density using openGL?

Say I have an openGL screen and I want to render part of the screen in different pixel density than the whole screen pixel density. Is it possible and if possible how?
1
vote
0answers
223 views

Vertex shader to Pixel shader NVIDIA problem - restarting drivers

I have problem with my shader on NVIDIA cards. On AMD it's working right. Shader Builder exported CODE: //ROOT //PSParts //VSParts //Samplers sampler sLod23ColorGround : register(s0); sampler ...
1
vote
1answer
561 views

Picking a suitable resolution for a modern low-res game?

I'm working on a 2D game project right now (using SFML+OpenGL and C++) and I'm trying to figure out how to go about choosing a resolution. I want my game to have a pixel resolution that is around that ...
12
votes
3answers
4k 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 ...
1
vote
2answers
676 views

HLSL Pixel Shader that does palette swap

I have implemented a simple pixel shader which can replace a particular colour in a sprite with another colour. It looks something like this: sampler input : register(s0); float4 ...
0
votes
3answers
3k views

How do I create a curved line or filled circle or generally a circle using C++/SDL?

Hello I've been trying for ages to make a pixel circle using the putpixel function provided by SDL main website here is that function : void putpixel(int x,int y , int color , SDL_Surface* surface) { ...
0
votes
1answer
589 views

How do I check on non-transparent pixels in a bitmapdata?

I'm still working on my window cleaning game from one of my previous questions I marked a contribution as my answer, but after all this time I can't get it to work and I have to many questions about ...
0
votes
1answer
200 views

Scanline filling of polygons that share edges and vertices

In this picture (a perspective projection of an icosahedron), the scanline (red) intersects that vertex at the top. In an icosahedron each edge belongs to two triangles. From edge a, only one triangle ...
2
votes
1answer
191 views

How to alter image pixels of a wild life bird?

Hello so I was hoping someone knew how to move or change color and position actual image pixels and could explain and show the code to do so. I know how to write pixels on a surface or screen-surface ...
3
votes
1answer
521 views

Scaling sprite velocity / co-ordinatesin Android

I'm trying to find the answer to a question that I've had for a long time, but am having trouble finding it! I hope someone can help :-) I'm trying to find information on how to scale sprite velocity ...
3
votes
2answers
754 views

Scan-Line Z-Buffering Dilemma

I have a set of vertices in 3D space, and for each I retain the following information: Its 3D coordinates (x, y, z). A list of pointers to some of the other vertices with which it's connected by ...
3
votes
1answer
384 views

How do I multiply pixels on an SDL Surface?

Okay so I'm able to put blank pixels into a surface and also draw gradient pixels rectangles,etc But I don't know how to multiply the pixels on a surface so I was hoping someone could provide me ...
-1
votes
4answers
3k views

Trying to figure out SDL pixel manipulation?

Hello so I've found code that plots a pixel in an SDL Screen Surface : void putpixels(int x, int y, int color) { unsigned int *ptr = (unsigned int*)Screen->pixels; int lineoffset = y * ...
-2
votes
1answer
7k views

Where can I find a programmer/game developer to team up with? [closed]

I'm a pixel artist looking for an ametuer programmer/game developer to team up with, But I'm not sure where to start! I'm not particularly worried about profit, I'm only interested in making the game ...