userData Uniforms

[Flexman]

Leadwerks engine has a number of built-in uniforms to pass values into shaders.

 

I propose adding a couple of extra uniforms for developer use to pass game values into shaders more easily.

 

Rather than having to scan *all* loaded materials to pass uniforms to them (not trivial as there isn't a publicly accessible list of loaded materials or shaders) it would be very handy to have a few UserData uniforms, much like entities have UserData keys.

 

Only a few would be needed and can't add much more overhead than the existing Leadwerks uniforms.

 

userDataVec4

userDataVec3

userDataVec2

userDataFloat

userDataInt

[Josh]

You can safely pass uniforms that don't exist, so you can declare these in whatever shaders you need, and set them from your program without worry. Or are you saying you want these to be global values the user sets, that all shaders access?

[Flexman]

Yes, global values so they can be accessed by all shaders like the existing ones listed on the wiki here http://www.leadwerks.com/wiki/index.php?title=Shaders

 

That would make it easier to apply some effect to many entities that don't share the same shader, or globally change a co-ordinate system.

[VeTaL]

Or are you saying you want these to be global values the user sets, that all shaders access?

I'm also interested in this.

[VeTaL]

Something like SetGlobalShaderVariableVec3("WindSpeed", Vec3(5, 0, 10)).

[Flexman]

Something like SetGlobalShaderVariableVec3("WindSpeed", Vec3(5, 0, 10)).

 

Yes, that would be perfect.