No Lighting with Shader

[FroggestSpirit]

I'm working on a 3D model editor for a game, and currently I have it load a .obj model, and store it into a vertex buffer that gets submitted for drawing. I have a directional light, and an ambiant light that work fine, however, if I create a new shader (the simple passthrough shader) and apply it, it draws the models completely black with no lighting. How can this be fixed?

 

[FroggestSpirit]

@MishMash Would you be able to assist me?

 

[MishMash]

Are you using GameMakers built-in lighting system? If so, this itself uses a "default" shader, when you switch to a custom one using shader_set, you loose the default behaviour. This includes a number of effects such as fog, lighting, colouring;

You can find the source for GMs default shaders in:

%appdata%/GameMaker-studio/Shaders

This code can be merged in (as I believe the uniforms used are accessible in any GM shader).

 

[FroggestSpirit]

Are you using GameMakers built-in lighting system? If so, this itself uses a "default" shader, when you switch to a custom one using shader_set, you loose the default behaviour. This includes a number of effects such as fog, lighting, colouring;

You can find the source for GMs default shaders in:

%appdata%/GameMaker-studio/Shaders

This code can be merged in (as I believe the uniforms used are accessible in any GM shader).

Are they the "FShaderCommon" and "VShaderCommon"? I tried copying them into the Fragment and vertex shader portions, and got some build errors

 

[MishMash]

Well, by merging, I didn't mean just pasting them in, as they won't necessarily just "plug in".

Rather, you need to extract the important parts of your code and work them into your shader

There are 3 main functions:

DoDirLight
DoPointLight

and then the linking function:

DoLighting

Which returns a colour of the lighting.