Questions tagged [color]
Color is the visual perception of light by humans into named categories, commonly "red," "green," and "blue."
203
questions
1
vote
1
answer
460
views
Gameobjects disappearing when changing renderer.material.color
I'm generating an array of objects using this code:
...
- 137
0
votes
2
answers
3k
views
Monogame - how to make a smooth color transition with Color.Lerp()?
I would like to know how to dynamically change a color. My code:
...
- 222
1
vote
1
answer
9k
views
How to get a pixel color from a specific sprite on touch (unity)?
I have a 2 layers of a different sprites. How can i get a pixel color from lower sprite?
I know how to get touch and world coordinates, but i have no idea what to do next.
...
- 13
7
votes
1
answer
803
views
Cycling through colors with the same brightness
Ok. So I have a game I am working on with a bunch of colored particles. Each of them gets their own color however they are all close to a specific shade.
To explain that better I am using the HSV ...
- 289
-2
votes
2
answers
403
views
How do I properly combine the colors of different lights?
Let's say I have 4 light colors:
(0.6,0.0,0.0), (0.0,0.6,0.0), (0.1,0.1,0.1), (0.1,0.1,0.1)
And now I want to combine them properly. I can't add them together, ...
- 105
5
votes
3
answers
4k
views
UI Text Won't Change Color in Unity 5
In Unity 5 on Windows 10, I try to change the text color from the Inspector and in scripts, but the color won't change. Here are some screenshots of my Text objects open in the inspector, with there ...
- 51
3
votes
1
answer
432
views
Is this converting from or to premultiplied alpha?
I found this code buried under some rocks:
...
- 3,795
3
votes
0
answers
171
views
Bitmap font engine: When is color modulation not supported?
I am developing a bitmap font renderer for a 2D game using SDL 2. (If it matters, I'm using Debian 8 "jessie".) I had planned on storing the glyphs as a grayscale image, translating gray levels to ...
- 546
4
votes
1
answer
2k
views
How to reduce color space in a post-processing material in Unreal Engine 4
I'm trying to get an old-school Quake 1 look going in UE4.
I am currently using this blueprint in order to get a retro style large pixel filter.
In game (might need to zoom in to see the difference)...
- 161
1
vote
1
answer
483
views
How do I make a 2D sprite flash green when tapped?
I have a sprite that is based on an image of a gray circle. When the user touches the sprite, I want the sprite to flash green, as in I want the circle to appear to turn green for 0.2 seconds. I tried ...
- 109
1
vote
2
answers
923
views
SDL_LoadBMP into glTexImage2D results in scewed colors
I read up on this but i can not find the error.
Some suggest switching the format from RBA to RGBA but the surface data says it is 3 byte data.
Here are snippets and results of my source.
Loading ...
- 113
2
votes
1
answer
415
views
Math behind XNA's spriteBatch.draw() color parameter?
I'm trying to make a shader that changes the color of a sprite the way the XNA spriteBatch.draw() color parameter changes color. I don't know exactly what it is called (the closest word I can think of ...
- 487
4
votes
2
answers
2k
views
Color key or transparent images?
Ive seen a lot of people make sprite sheets magenta instead of transparent and then they make the magenta transparent using code. What is best (Performance) to use transparent images or use a color (...
user61929
3
votes
1
answer
2k
views
How can I use a lookup table for brightness and contrast?
Currently, I implemented a rudimentary brightness and contrast algorithm that changes brightness and contrast pixel by pixel. This was super inefficient performance wise and the algorithm looked a bit ...
- 149
13
votes
8
answers
33k
views
How to Color.Lerp between multiple colors?
I have found it rather difficult to find a solution to this in the Unity documents.
Color.Lerp(Color a, Color b, float t) is a function that gradually changes a ...
- 922
0
votes
2
answers
82
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 ...
user59526
0
votes
1
answer
276
views
Is it possible to store diffuse and normal maps in the same texture area and preserve SRGB/linear space?
Usually, one would want to upload texture data to OpenGL with GL_SRGB* for the internalformat of a texture, and ...
- 125
0
votes
1
answer
309
views
Why does RGB order differ between color formats?
On the reference page for SurfaceFormat, it indicates that the Bgra4444 format is an unsigned format which is 16-bits long, with 4 bits per color with alpha. ...
- 397
1
vote
2
answers
4k
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 ...
- 111
0
votes
1
answer
5k
views
In Pygame, how can I check if an object is touching a color?
Is there a way to tell if a sprite is touching a specific color on the screen, maybe given as a hex code. I know you can do pygame.sprite.collide for sprites, but ...
- 109
2
votes
0
answers
3k
views
Easy way to set face colors with indexed VBOs?
I'm loading OBJs, which lend themselves well to setting up as indexed VBOs, since each vertex is only defined once and then a face definition will reference the same vertex more than once when they ...
- 131
2
votes
1
answer
501
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 ...
- 53
3
votes
1
answer
4k
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 ...
- 583
-2
votes
1
answer
2k
views
GLSL- How to change a certain color of a sprite, to another color passed into the shader?
There are sprites, with certain pixels being bright pink, and a shader dyes these pink or grayscale pixels to a custom color determined by the player. For example, a character looks normal except for ...
- 509
0
votes
1
answer
757
views
33
votes
8
answers
6k
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 ...
- 14.8k
0
votes
1
answer
507
views
How does Texture2D.GetData return coloured pixels?
I'm trying to work out how the pixels are stored in the returned array but I'm not having a lot of luck (and thus my calculations don't seem to be working).
I realize that the pixels are stored in ...
- 277
23
votes
6
answers
5k
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 ...
- 377
0
votes
1
answer
111
views
OpenGL strange rendering problem when buffers have different sizes
I have encountered a very odd error in my program, "odd" in the sense that everything the API says suggests that the error should not occur.
I have a bunch of 2D un-indexed vertex data, and I want to ...
- 45
4
votes
1
answer
768
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 ...
- 143
4
votes
2
answers
3k
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 ...
- 1,048
16
votes
7
answers
4k
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 "...
- 311
14
votes
3
answers
3k
views
How do I simulate color blindness for accessibility testing?
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 good ...
- 11.3k
10
votes
2
answers
4k
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 ...
- 2,937
4
votes
2
answers
1k
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:
...
- 117
2
votes
2
answers
6k
views
What is the correct way to reset and load new data into GL_ARRAY_BUFFER?
I am using an array buffer for colors data. If I want to load different colors for the current mesh in real time what is the correct way to do it. At the moment I am doing:
...
- 157
9
votes
4
answers
9k
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, ...
- 439
2
votes
2
answers
439
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 ...
2
votes
1
answer
2k
views
Why am I not getting an sRGB default framebuffer?
I'm trying to make my OpenGL Haskell program gamma correct by making appropriate use of sRGB framebuffers and textures, but I'm running into issues making the default framebuffer sRGB.
Consider the ...
- 143
1
vote
1
answer
419
views
XNA 4: GetData from Texture2D and Set it into Texture3D with specific order
I am trying to convert my color grading 2d lookup texture into 3d LUT. When I simply use:
ColorAtlas.GetData(data);
ColorAtlas3D.SetData(data);
I get this:
I ...
- 1,551
4
votes
1
answer
199
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:
...
- 1,551
4
votes
1
answer
2k
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?
- 43
0
votes
1
answer
421
views
How to blend bullet sprite from white to yellow in libgdx
Does anyone have a clue that will make my bullet sprite fade from yellow to white? As the bullet is created it will be white but when it trails on it will turn yellow. Any ideas how? Is it a simple ...
- 483
0
votes
1
answer
599
views
Creating a gradient for a texture - Why is the color becoming dark on one side?
Updated
While debugging I looked at the lerp and it was calculating into a negative number at the start. So I added in checks for to low or high a value, and that seems to have fixed it. I'll answer ...
- 455
0
votes
1
answer
742
views
How do you calculate a gradient value within multiple colors (gradient stops)
In WPF/Silverlight XAML you can have a brush with multiple gradient stops at different points along the color line.
I was able to replicate this behavior with two colors, a single color lerp, from ...
- 455
1
vote
1
answer
741
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 ...
- 455
1
vote
2
answers
2k
views
Sprite collision with color?
Is this possible?
To elaborate, I am making a PacMan offshoot. Essentially it is a "zoomed in" version of the game, but the board is randomly generated. I have 11 .png files each to be used as a ...
- 11
2
votes
2
answers
81
views
2 Images, same object: tone difference and alignment
I would like to know a software which helps in post-production to calculate the general color/tone difference of 2 images. The images contain the same object, but arn't shot from the same position. ...
5
votes
3
answers
11k
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 perform ...
- 181
0
votes
1
answer
269
views
XNA Float values don't work as parameter
With the Microsoft XNA Framework I can change the color of a tinted texture by changing it's integer values like so:
...
- 1