pass normals and worldPosition to pixel shader

Game.cpp

@@ -198,6 +198,7 @@ void Game::Draw(float deltaTime, float totalTime)
 		vs->SetMatrix4x4("world", entity->GetTransform()->GetWorldMatrix());
 		vs->SetMatrix4x4("view", camera->GetViewMatrix());
 		vs->SetMatrix4x4("projection", camera->GetProjectionMatrix());
+		vs->SetMatrix4x4("worldInvTranspose", camera->GetTransform()->GetWorldMatrixInverseTranspose());
 		vs->CopyAllBufferData();
 
 		std::shared_ptr<SimplePixelShader> ps = entity->GetMaterial()->GetPixelShader();

Includes.hlsli

@@ -15,6 +15,8 @@ struct VertexToPixel
 	//  v    v                v
 	float4 screenPosition	: SV_POSITION;
 	float2 uv				: TEXCOORD;
+	float3 normal			: NORMAL;
+	float3 worldPosition	: POSITION;
 };
 
 // Struct representing a single vertex worth of data

SimplePixelShader.hlsl

@@ -7,7 +7,8 @@ cbuffer ExternalData : register(b0)
 	float3 ambient;
 }
 
-float4 main() : SV_TARGET
+float4 main(VertexToPixel input) : SV_TARGET
 {
-	return float4(ambient.rgb, 1);
+	input.normal = normalize(input.normal);
+	return float4(input.normal, 1);
 }

VertexShader.hlsl

@@ -5,6 +5,7 @@ cbuffer ExternalData : register(b0)
 	matrix world;
 	matrix view;
 	matrix projection;
+	matrix worldInvTranspose;
 }
 
 // --------------------------------------------------------
@@ -37,6 +38,10 @@ VertexToPixel main( VertexShaderInput input )
 	// - We don't need to alter it here, but we do need to send it to the pixel shader
 	output.uv = input.uv;
 
+	// Pass normal and world position throuh
+	output.normal = mul((float3x3)worldInvTranspose, input.normal);
+	output.worldPosition = mul(world, float4(input.localPosition, 1)).xyz;
+
 	// Whatever we return will make its way through the pipeline to the
 	// next programmable stage we're using (the pixel shader for now)
 	return output;