From 57650e310e91449a35f1457e4694f57871130831 Mon Sep 17 00:00:00 2001
From: Lightling <contactlightling@gmail.com>
Date: Sat, 19 Mar 2022 16:39:01 -0400
Subject: [PATCH] calculate directional light

---
 SimplePixelShader.hlsl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/SimplePixelShader.hlsl b/SimplePixelShader.hlsl
index c85fca4..9396f9b 100644
--- a/SimplePixelShader.hlsl
+++ b/SimplePixelShader.hlsl
@@ -12,5 +12,10 @@ cbuffer ExternalData : register(b0)
 float4 main(VertexToPixel input) : SV_TARGET
 {
 	input.normal = normalize(input.normal);
-	return float4(input.normal, 1);
+	float3 ambientTint = ambient * tint;
+	float3 directionalLight1Dir = normalize(-directionalLight1.Direction);
+	float diffuse = saturate(dot(input.normal, directionalLight1Dir));
+	float3 final = (diffuse * directionalLight1.Color * tint) + ambientTint;
+
+	return float4(final, 1);
 }