panda3d/samples/fireflies/model.sha

//Cg
//
//Cg profile arbvp1 arbfp1

void vshader(float4 vtx_position : POSITION,
             float2 vtx_texcoord0 : TEXCOORD0,
             float3 vtx_normal : NORMAL,
             float4 vtx_color : COLOR,
             out float4 l_position : POSITION,
             out float2 l_texcoord0 : TEXCOORD0,
             out float4 l_color : COLOR,   
             out float3 l_normal : TEXCOORD1,
             uniform float4x4 mat_modelproj,
             uniform float4x4 itp_modelview)
{
  l_position=mul(mat_modelproj, vtx_position);
  l_texcoord0 = vtx_texcoord0;
  l_color = vtx_color;
  l_normal = (float3)mul(itp_modelview, float4(vtx_normal, 0));
}

void fshader(float2 l_texcoord0: TEXCOORD0,
             float4 l_color: COLOR,
             float3 l_normal: TEXCOORD1,
             uniform sampler2D tex_0 : TEXUNIT0,
             out float4 o_color: COLOR0,
             out float4 o_normal: COLOR1)
{
  l_normal = normalize(l_normal);
  o_color = l_color * tex2D(tex_0, l_texcoord0);
  o_normal.rgb = (l_normal * 0.5) + float3(0.5, 0.5, 0.5);
  o_normal.a = o_color.a;
}