Color is the visual perception of light by humans into named categories, commonly "red," "green," and "blue."

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207
votes
12answers
10k views

Is there an optimum set of colors for 10 players?

I need to identify 10 players with a unique color for each on the map. Is there an optimum set of 10 colors to use in this case? Every set I come up with has some colors too similar. Update: I was ...
36
votes
5answers
1k views

Best Way to allow players to “Dye” images without losing color quality?

I am creating a 2.5D isometric (2D images) game. I want the players to be able to "dye" their armor, clothes, and other things. I find that grayscaling everything leads to losing out on some of the ...
31
votes
6answers
4k views

Do complementary shadows make sense for games?

According to color theory, shadows work better if they don't use pure blacks or grays, but instead use a color that's complementary to the color of the object casting that shadow. That is, if you ...
21
votes
6answers
3k views

Algorithm to modify a color to make it less similar than background

I'm creating a demo of 20 balls bouncing each other, with a background filled with a solid color. Color for each ball is chosen randomly with randint(0, 255) for each R, G, B tuple component. Problem ...
17
votes
5answers
4k views

Given a RGB color x, how to find the most contrasting color y? [duplicate]

Possible Duplicate: Making a symbol appear on any colour I have to mark a certain item in a way that will make it stick-out in the background. I need it to be surrounded with the color that ...
14
votes
7answers
2k views

What does the term “channel” mean when used in regards to computer graphics?

I was studying terminology for computer graphics, and this statement came up that confused me. The image can have alpha channels for transparency. I tried searching for the meaning of the term ...
11
votes
1answer
441 views

How to achieve light that changes color mid-way?

I thought of creating light sources, and some colored windows. Now, the windows are semi-transparent. How could I make it so that when the light (say, pure white) hits the glass and continues through ...
10
votes
6answers
653 views

What's a good alternative to colored tiles to account for color blindness?

I have a game with tiles. Each tile is a number, and each number is one of six colors. The color is important to the game play, and I want to make the game available to those who are color blind. ...
9
votes
3answers
8k views

How can I include vertex color information in .OBJ files?

The .obj files I export are missing data for vertex colors. Is there a way to include color information in the .obj file? If not, what are the alternatives?
7
votes
2answers
260 views

2-components color model

RGB is the natural color model for OpenGL. But a lot of other color models exist. For example, CMY(K) for printers, YUV for JPEG, the little cousins YCbCr and YCoCg, HSL & HSV from the 70's, and ...
7
votes
4answers
599 views

Bright colors versus duller colors

I was talking to a friend the other day and we got onto the discussion about colors in videogames, relating to actual in-game graphics/art. He told me that even though it's easy to see things when ...
7
votes
2answers
488 views

Making a symbol appear on any colour

I'm developing an RPG/roguelike-style game. Instead of having maps like: ......... ......... ....@.... ...h..... Oh look, a dwarf. I was having solid background tiles, So sort of a tile based RPG ...
7
votes
2answers
1k views

How do I change a sprite's color?

In my rhythm game, I have a note object which can be of a different color depending on the note chart. I could use a sprite sheet with all the different color variations I use, but I would prefer to ...
6
votes
1answer
372 views

Is white the best base color to start with when planning to shade sprites within Unity?

I'm looking into prototyping a game in Unity which will consist of solid square sprites / tiles. I figure I can represent different types of objects with different colors for each of the tiles in the ...
6
votes
4answers
2k views

Fading to transparent with premultiplied alpha

I'm fading an object from fully visible to transparent, but the fade darkens the object. this.Color = Color.Lerp(Color.White, Color.Transparent, weight); The object does fade to transparent, but.. ...
6
votes
1answer
168 views

Excluding Background from Color Picking

I've implemented picking based on color coding, but I don't want the background color to be pickable. Is there any way in openGL (2.x) to exclude the background color? For some reason, doing ...
6
votes
2answers
197 views

Tool to simulate color blindness

TLDR: is there an application I can download (or some configuration of Windows, or something) that will let me see how my game will appear to users with different color-blindnesses? There are already ...
5
votes
6answers
721 views

Colors for villains, good guys and neutrals

I am looking for 4-6 color schemes for three factions, good, evil and neutral (in a space strategy if that matters). I'd like the player to choose which side they want to play and each side will have ...
5
votes
3answers
1k views

How do I create a color picker with variable hue and saturation?

I am trying to create a Color Picker similar to that of MS Paint. Unfortunately, I can't figure out the algorithm for saturation. This is what my current algorithm creates. Anytime I try to ...
5
votes
1answer
214 views

Coloring Terrain By Steepness Issue

Also I am attempting to implement some simple coloring by "slope" onto my planet and to do this I take the normal mapped normal "y" component and subtract it from one. Yet I am getting some strange ...
4
votes
2answers
530 views

Programatically replace color gradient on sprite

Say I have the following image: I want to tint the yellow parts on this sprites shoulder/arms by a random color. In other questions on this site, they suggest using a chroma key and replacing the ...
4
votes
1answer
139 views

cost of texture change vs color change

How would I go about determining the difference in cost between changing the render color of an object every frame vice changing the texture (same sheet, just changing the source rectangle) every ...
4
votes
1answer
131 views

Problem building a color grading map

I am trying to build a default color grading map into a 1024x32 RenderTarget. Here is my shader code: VertexShaderOutput VertexShaderFunction(VertexShaderInput input) { VertexShaderOutput output; ...
3
votes
4answers
3k 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 ...
3
votes
1answer
250 views

Rendering a black and white image in OpenGL 1.1

Is there is any way that I can simple disable the color in OpenGL 1.1? Or can I "grey out" textures in LWJGL?
3
votes
2answers
94 views

How can I read the color of a specific pixel in XNA?

I want a way to find out if, for example, the pixel at Vector2(2, 5) on the game window is color Color.Red, or some other color or set of coordinates. How can I do this?
3
votes
1answer
1k views

*DX11, HLSL* - Colour as 4 floats or one UINT

With the DX11 pipeline, would it be much quicker for the vertex buffer to pass one single UINT with one byte per channel to the input assembler, as opposed to three floats? Then the vertex shader ...
3
votes
1answer
833 views

Apply Vertex Colors to XNA Spritebatch sprites

I know that you can use custom vertex and pixel shaders using SpriteBatch but I can't figure out how to apply colors to individual vertex points on a sprite generated by spritebatch. All I can do is ...
3
votes
1answer
211 views

Best way to blend colors in tile lighting? (XNA)

I have made a color, decent, recursive, fast tile lighting system in my game. It does everything I need except one thing: different colors are not blended at all: Here is my color blend code: ...
2
votes
2answers
517 views

Implementing a color picker [closed]

I'm making a paint program using applets in Java, and I want to create some sort of color palette where the colors blend into each other, similar to this: However, I'm having trouble understanding ...
2
votes
1answer
238 views

When should I use color keying vs PNG transparency?

SDL (and other toolkits) can use color keying to make a certain color in an image transparent. Alternatively, you could load a PNG image that supports transparency. When should I use which?
2
votes
1answer
1k views

Programmatically set color of Box2D body's sprite or image

In my basic Cocos2D + Box2D iPhone app I have a bunch of circular Box2D bodies. I'd like to change the color of the circles programatically. What's the easiest way to do this? So far I'm just ...
2
votes
2answers
87 views

Palette reduction to pre-defined palette

I'm writing a bunch of GLSL effects for fun, but I can't wrap my head around this. Basically, I want to reduce a texture's palette into a pre-defined set of colors. For example, a post-processing ...
2
votes
2answers
106 views

Colorize with a given color a texture

I have a texture and I want to "colorize" it with a given color, lets say cyan (#00ffff) or purple (#800080). What I want to do, is get all the pixel values from the texture, and remove the color and ...
2
votes
1answer
94 views

Why is it when I render a basic cube, my editor's grid changes too?

I have one HLSL file for DirectX11 that only has input layout for color and position. Then another HLSL file for the simple cube that has position, normal and textures. What I noticed is when I render ...
2
votes
1answer
141 views

Get average tile color

In my 2D game I have TileSet class that loads the texture and creates Rectangle[] array which stores each tile coordinates. Pretty basic stuff. Now I'd like to also calculate and store the average ...
2
votes
1answer
275 views

Shader and Custom Vertex Format Errors

I am creating an editor of sorts that allow you to create 3D voxel models. I just got started and have ran into a few errors. Here is what it is producing: I think the problem has to do with the ...
2
votes
1answer
118 views

How do I multiply two RGBA colours?

I have two RGBA integers. What procedure should I perform on them to return the multiplied colour? Do I need to split the RGBA integer into its component integers (R, G, B, A)? I'm using this for a ...
2
votes
1answer
94 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 ...
2
votes
1answer
49 views

How can I tint a Texture2D with a gradient?

I am working on a lighting system for my game. Instead of lighting each tile completely with only one color, I want to create a gradient on that tile so to make the lighting look more dynamic and ...
2
votes
2answers
138 views

Filling in a shape from vertices

What I'm trying to do is set a bunch of points to create a shape and then fill everything in within those points. It needs to be done in 3D becasue this is being used as a way to generate a texture ...
2
votes
1answer
461 views

Blending colors on Surfaces in PyGame?

So I'm making a game in Python and PyGame. I have aliens and blocks that each adopt one of several colors; rather than make several copies of them in different colors, I plan on making the sprite ...
2
votes
1answer
269 views

How can I get the texture color data from GLEED2D's level file?

I've hit a little snag in my game. It's a 2D platform game and I need to check for collisions against the level. I'm using GLEED2D to create the map. I'd like to do per-pixel collision checking, but ...
2
votes
1answer
443 views

Hemicube algorithm d3d9 or d3d11, float valued colors

The hemicube algorithm renders the scene to 5 sides of a half-cube, from the perspective of each polygon. Assume you place the hemicube around me and render to the 5 sides. The idea is, we can see ...
2
votes
1answer
563 views

Java how to color text without using JNI?

I am working on a small text-based game in Java. I am trying to understand the concept of how to color the output without needing to use JNI. C++ has the ability to modify the console directly and ...
2
votes
1answer
95 views

Getting an instance of KX_PolygonMaterial in Blender

I've got a question concerning using Python in Blender's Game Engine. Before I start I want to state that I'm trying to change the color of an object in Blender's game engine. To do this, I'm ...
1
vote
2answers
537 views

What is the color value of daylight?

This is a very short question. I want to implement ambient light in the color of daylight from the sun. What is the color value of sun light?
1
vote
1answer
202 views

Image drawing tools (that aren't Photoshop) that work in the sRGB colorspace

I'm looking for a way to create sRGB raster images. Now, I could use Inkscape and just have it render to a raster format, but are there any image drawing tools other than Photoshop that work in sRGB? ...
1
vote
1answer
246 views

How do I find two points at an angle on opposite sides of a circle?

With reference to my previous question: I'm using micklh's answer, which works perfectly. However, it calculates the gradient based on two points, a starting point and an ending point. I want to ...
1
vote
2answers
899 views

How (update,set, apply) dynamically color on a model of a XNA project?

I encounter a problem for set a background color on my model instantiated. I can change the texture but not change color. Is there a parameter for change the color ? Or change the opacity ? I am ...