Pixel Shader

struct OutputVertex
{
    float4 xyzw : SV_POSITION;
    float4 rgba : OCOLOR;
    float2 uv : UV;
    float3 nrm : NORMAL;
    float4 world : WPOS;
    float3 loc : LOCAL;
};

struct Light
{
    float3 dir;
    float x;
    float4 ambient;
    float4 diffuse;
    float3 pos;
    float range;
    float3 att;
    float y;
    float3 dir2;
    float cone;
};

cbuffer cbperframe : register(b)
{
    Light light;
};

Texture2D env : register(t0);
SamplerState envFilter : register(s0);

float4 main(OutputVertex inputP) : SV_TARGET
{

    // Directional
    inputP.nrm = normalize(inputP.nrm);
    float3 dir = normalize(light.dir);
    float4 inp = env.Sample(envFilter, inputP.uv);
    float3 final1 = inp * light.ambient;
    final1 += saturate(dot(-dir, inputP.nrm) * light.diffuse * inp);
    float4 dire = float4(final1, inp.a);

    // Point
    float3 lightToPixel = light.pos - inputP.world.xyz;
    float d = length(lightToPixel);
    float3 ambi = inp * light.ambient;

    float4 pnt = float4(0.0f, 0.0f, 0.0f, 0.0f);
    if (d < light.range)
    {
        float3 final2 = float3(0.0f, 0.0f, 0.0f);
        lightToPixel /= d;
        float howMuch = dot(lightToPixel, inputP.nrm);

        if (howMuch > 0.0f)
        {
            final2 += (howMuch * inp.xyz * float3(1.0f, 0.0f, 0.0f));
            float rangeAtt = 1.0f - saturate(d / light.range);
            final2 *= rangeAtt;
        }

        final2 = saturate(final2);
        pnt = float4(final2, inp.a);
    }

    // Output
    float4 combined = dire + pnt + float4(ambi, 0.0f);
    float4 real = saturate(combined);
    return real;
}