structs in shaders

General Discussion
1

Hi buddies

May i use structs in my panda CG shaders? If yes i need pass my vshader out to fshader in ? I try but the things goes wrong…

Thanx

2

Yes, you can use structs in Cg shaders. What specific problems are you running into?

3

Pro

My version of CG from cg tutorial3:

//Cg

struct vertexIn
{
float4 vtx_position:POSITION;
};

struct vertexOut
{
float4 l_position:POSITION;
};

struct pixelOut
{
float4 o_color:COLOR;
};

void vshader(uniform float4x4 mat_modelproj, in vertexIn entrada, out vertexOut saida)
{
saida.l_position=mul(mat_modelproj, entrada.vtx_position);
}

void fshader(out pixelOut saidaPixel)
{
saidaPixel.o_color=float4(1.0,0.0,1.0,1.0);
}

Panda send this message:

…unrecognized parameter name (varying out float4 saidaPixel.o_color) …

and i got black screen im my program. :confused:
I’m dummy about cg either :smiley: , still on training…

4

Oh, hm. This seems like a bug in Panda3D, thanks for reporting.
I’ll try to get this fixed soon. In the meantime, do not use structs.

5

All right :smiley:
Thanx for

6

For the record: the upcoming 1.7.0 version of Panda fixes this bug and allows you to put your parameters inside structs.