How to shade a texture two different colors?

Posted by Venesectrix on Game Development See other posts from Game Development or by Venesectrix
Published on 2012-12-08T01:29:54Z Indexed on 2012/12/08 6:00 UTC
Read the original article Hit count: 269

Filed under:

textures

|

shaders

To give an example of what I'm asking about, I'll use Saints Row 3 since I've been playing that lately. In that game you can customize your looks and your car's appearance a lot. Your coat can have a primary color and a trim color. Your car can have a primary color and a stripe color, etc.

Is there just a single coat texture that is being shaded two different colors somehow or are they overlaying a transparent second texture for the trim/stripes that gets shaded differently?

If it's just one texture I'd like to know how it's done.

If it's two different textures it seems like it's a waste of space. The second texture would be the same size as the first one but mostly transparent if you just wanted to lay it on top of the first one. Or are they just carefully positioning a second, smaller texture so that it aligns properly with the first one?

© Game Development or respective owner

Related posts about textures

Textures on top of other textures when using VBOs

as seen on Game Development - Search for 'Game Development'
I'm currently making a cube style game. With chunks being drawn with VBOs. I'd like to know if there is a way to create an overlay texture on top of the existing texture without the need to rebuild the VBO. This is required to show activity in a cube (think of Minecraft when destroying a block and… >>> More
Texture switching with a entity system

as seen on Game Development - Search for 'Game Development'
I'm using thinking of using an entity system in my game. So far I've been using Artemis with success. However, I have a question about texture switching. I read that switching textures too often is bad. So I load all the textures when the game loads like so: import org.newdawn.slick.opengl.TextureLoader; … >>> More
SFML: Generate a background image

as seen on Game Development - Search for 'Game Development'
I want to generate a background, which is used in the game, on every instance of the game based on certain conditions. To do so, I'm using a sf::RenderTexture and a sf::Texture like this: sf::RenderTexture image; std::vector<sf::Texture> textures; sf::Texture texture; // instantiating the vector… >>> More
Unity: how to apply programmatical changes to the Terrain SplatPrototype?

as seen on Game Development - Search for 'Game Development'
I have a script to which I add a Terrain object (I drag and drop the terrain in the public Terrain field). The Terrain is already setup in Unity to have 2 PaintTextures: 1 is a Square (set up with a tile size so that it forms a checkered pattern) and the 2nd one is a grass image: Also the Target… >>> More
SDL2 sprite batching and texture atlases

as seen on Game Development - Search for 'Game Development'
I have been programming a 2D game in C++, using the SDL2 graphics API for rendering. My game concept currently features effects that could result in even tens of thousands of sprites being drawn simultaneously to the screen. I'd like to know what can be done for increasing rendering efficiency if… >>> More

Related posts about shaders

Implementing algorithms via compute shaders vs. pipeline shaders

as seen on Game Development - Search for 'Game Development'
With the availability of compute shaders for both DirectX and OpenGL it's now possible to implement many algorithms without going through the rasterization pipeline and instead use general purpose computing on the GPU to solve the problem. For some algorithms this seems to become the intuitive canonical… >>> More
How do multipass shaders work in OpenGL?

as seen on Game Development - Search for 'Game Development'
In Direct3D, multipass shaders are simple to use because you can literally define passes within a program. In OpenGL, it seems a bit more complex because it is possible to give a shader program as many vertex, geometry, and fragment shaders as you want. A popular example of a multipass shader is… >>> More
Differences in cg shader code for OpenGL vs. for DirectX?

as seen on Game Development - Search for 'Game Development'
I have been trying to use an existing library that automatically generates shaders (Hydrax plugin for Ogre3D). These shaders are used to render water and somewhat involved, but are not extremely complicated. However there seems to be some differences in how the cg shaders are handled by OpenGL and… >>> More
WPF Parent Window shading using Pixel Shaders

as seen on Code Project - Search for 'Code Project'
This article discusses using Pixel Shaders to shade the main window when a dialog is showing. >>> More
Unity3D draw call optimization : static batching VS manually draw mesh with MaterialPropertyBlock

as seen on Game Development - Search for 'Game Development'
I've read Unity3D draw call batching documentation. I understood it, and I want to use it (or something similar) in order to optimize my application. My situation is the following: I'm drawing hundreds of 3d buildings. Each building can be represented using a Mesh (or a SubMesh for each building… >>> More