panda3d/tests/display/cg_simple.sha

//Cg
//

void vshader(float4 vtx_position : POSITION,
             float2 vtx_texcoord0 : TEXCOORD0,
             uniform float4x4 mat_modelproj,
             out float4 l_position : POSITION,
             out float2 l_texcoord0 : TEXCOORD0)
{
  l_position = mul(mat_modelproj, vtx_position);
  l_texcoord0 = vtx_texcoord0;
}

void fshader(float2 l_texcoord0 : TEXCOORD0,
             uniform sampler2D tex_0 : TEXUNIT0,
             out float4 o_color : COLOR)
{
  float4 texColor = tex2D(tex_0, l_texcoord0);
  o_color = texColor * 2 * (texColor.w - 0.5);
}