DX sprites and stuff I guess

src/game/Rendering/DirectX/Shaders/pixel.hlsl

@@ -5,7 +5,11 @@ cbuffer ConstantBuffer
 	float4x4 ViewMatrix;
 	float4x4 ProjectionMatrix;
 	float4x4 InverseTransposeViewModel;
-	float3 LightPosition;
+	float4 Color;
+	float4 LightPositions[10];
+	float4 LightColors[10];
+	float LightRadii[10];
+	uint NumLights;
 }
 
 Texture2D Texture;
@@ -27,22 +31,46 @@ struct VOut
 	float4 BoneWeights2 : BLENDWEIGHT1;
 };
 
+float4 phong(float3 lightPos, float lightRadius, float3 lightColor, float3 position, float3 normal, float3 specular, float specularExponent)
+{
+	float3 LightSpecular = float3(1.0f, 1.0f, 1.0f) * 0.5f;
+
+	// Diffuse
+	lightPos = mul(ViewMatrix, float4(lightPos, 1.0f)).xyz;
+	float3 distanceToLight = lightPos - position;
+	float3 directionToLight = normalize(distanceToLight);
+	float dotProd = dot(directionToLight, normal);
+	float3 Idiffuse = lightColor * dotProd;
+
+	// Specular
+	float3 surfaceToViewer = normalize(-position);
+	float3 halfWay = normalize(surfaceToViewer + directionToLight);
+	float dotSpecular = max(dot(halfWay, normal), 0.0f);
+	float specularFactor = pow(dotSpecular, specularExponent);
+	float3 Ispecular = specular * LightSpecular * specularFactor;
+
+	// Attenuation
+	float dist = distance(lightPos, position);
+	float attenuation = pow(max(0.0f, 1.0f - (dist / lightRadius)), 2.0f);
+
+	return float4((Idiffuse + Ispecular) * attenuation, 1.0f);
+}
+
 float4 main(VOut input) : SV_TARGET
 {
-	float4 ambientLight = float4(1.0f, 1.0f, 1.0f, 1.0f) * 0.1f;
-	////float4 lightPos = float4(0.0f, -1.0f, 2.0f, 0.0f);
-	float4 lightColor = float4(1.0f, 1.0f, 1.0f, 1.0f);
+	//float4 ambientLight = float4(1.0f, 1.0f, 1.0f, 1.0f) * 0.1f;
+	//float4 lightColor = float4(1.0f, 1.0f, 1.0f, 1.0f);
+	//float3 lightToPixel = normalize(LightPosition - mul(input.Position, transpose(ModelMatrix)));
+	//float diffuseBrightness = saturate(dot(lightToPixel, normalize(mul(input.Normal, transpose(ModelMatrix)))));
 
+	float4 diffuseTexture = Texture.Sample(samplerState, input.TextureCoord) * Color;
+	float4 lights = float4(1.f, 1.f, 1.f, 1.f);
 
-	float3 lightToPixel = normalize(LightPosition - mul(input.Position, transpose(ModelMatrix)));
+	for (uint i = 0; i < NumLights; i++) {
+		float4 light = phong(LightPositions[i], LightRadii[i], LightColors[i].rgb, input.Position, normalize(input.Normal.xyz), float3(1.0f, 1.0f, 1.0f), 1.0f);
+		lights = lights + light;
+	}
 
-	//float3 lightModelPos = mul(ModelMatrix, LightPosition);
-	float diffuseBrightness = saturate(dot(lightToPixel, normalize(mul(input.Normal, transpose(ModelMatrix)))));
-
-	//input.texcoord.y = 1 - input.texcoord.y;
-	//return float4(input.normal.xy, 0.0f, 0.0f);
-	return Texture.Sample(samplerState, input.TextureCoord);
-	//return float4(input.color.xy, 0.0f, 0.0f);
-	//return (ambientLight + lightColor * diffuseBrightness) * Texture.Sample(samplerState, input.texcoord);
-	//return float4(0.0f, 0.0f, 1.0f, 1.0f);
+	//return float4(1.f, 0.f, 0.f, 1.f);
+	return float4(diffuseTexture.rgb * 0.8f, diffuseTexture.a) * lights;
 }