while the vertex in view space is got by mWorldView * vPos
I'm really confused by this.
void FFP_Light_Directional_DiffuseSpecular(in mat4 mWorldView, in vec4 vPos, in mat4 mWorldViewIT, in vec3 vNormal, in vec3 vNegLightDirView, in vec3 vDiffuseColour, in vec3 vSpecularColour, in float fSpecularPower, in vec3 vBaseDiffuseColour, in vec3 vBaseSpecularColour, out vec3 vOutDiffuse, out vec3 vOutSpecular)
{
vOutDiffuse = vBaseDiffuseColour;
vOutSpecular = vBaseSpecularColour;
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
float nDotL = dot(vNormalView, vNegLightDirView);
vec3 vView = -normalize((mWorldView * vPos).xyz);
vec3 vHalfWay = normalize(vView + vNegLightDirView);
float nDotH = dot(vNormalView, vHalfWay);
if (nDotL > 0.0)
{
vOutDiffuse += vDiffuseColour * nDotL;
vOutSpecular += vSpecularColour * pow(clamp(nDotH, 0.0, 1.0), fSpecularPower);
}
}
