Start of PBR

GlitchyEditor/content/Shaders/LightingFunctions.hlsl

@@ -0,0 +1,28 @@
+#define PI 3.14159265358979323846f
+
+/**
+ * Calculates the diffuse lighting of a lambertian surface
+ * @param diffuseColor (rho/ pi) * C_diffuse
+ * @param illuminanceColor The product of the "brightness" and the light color.
+ * @param n_dot_l The dot product of the surface normal and the light direction.
+ */
+float3 CalculateDiffuseReflection(float3 diffuseColor, float3 illuminanceColor, float3 n_dot_l)
+{
+    float3 directColor = illuminanceColor * saturate(n_dot_l);
+
+    return (directColor * diffuseColor);
+}
+
+/**
+ * Calculates the blinn-phong-specular reflection
+ * @param n The normalized surface normal
+ * @param h The normalized half way vector (nrm(l + v))
+ * @param alpha The reflections alpha-value
+ * @param illuminanceColor The product of the "brightness" and the light color.
+ * @param n_dot_l The dot product of the surface normal and the light direction.
+ */
+float3 CalculateSpecularReflection(float3 n, float3 h, float alpha, float3 illuminanceColor, float n_dot_l)
+{
+    float highlight = pow(saturate(dot(n, h)), alpha) * float(n_dot_l > 0.0);
+    return (illuminanceColor * highlight); // Todo:  * SpecularColor
+}

GlitchyEditor/content/Shaders/ShaderFunctions.hlsl

@@ -0,0 +1,84 @@
+
+/*
+* Calculates the weighted sum of two normal vectors.
+* nrm1: The first normal vector
+* nrm2: The second normal vector
+* a: The weight factor for nrm1
+* b: The weight factor for nrm2
+*/
+float3 BlendNormals(float3 nrm1, float3 nrm2, float a, float b)
+{    
+    return normalize(float3(a * nrm1.x / nrm1.z + b * nrm2.x / nrm2.z, 
+         a * nrm1.y / nrm1.z + b * nrm2.y / nrm2.z, 
+         1.0f));
+}
+
+/*
+* Scales a normal vector by a factor where 0 results in the vector (0, 0, 1)
+* nrm: The normal vector
+* a: The scaling factor
+*/
+float3 ScaleNormal(float3 nrm1, float a)
+{    
+    return normalize(float3(a * nrm1.x / nrm1.z, 
+         a * nrm1.y / nrm1.z, 
+         1.0f));
+}
+
+/*
+* Scales a normal vector by a factor where 0 results in the vector (0, 0, 1)
+* nrm: The normal vector
+* a: The scaling factor
+*/
+float3 ScaleNormal(float3 nrm1, float2 a)
+{
+    return normalize(float3(a.x * nrm1.x / nrm1.z,
+							a.y * nrm1.y / nrm1.z,
+							1.0f));
+}
+
+/*
+* Reconstructs the z-component of a normalized normal vector from a two-component value
+* cnrm: The x- and y-components of a normalized normal vector
+*/
+float3 DecompressNormal(float2 cnrm)
+{
+    return float3(cnrm, sqrt(1.0 - cnrm.x * cnrm.x - cnrm.y * cnrm.y));    
+}
+
+/*
+* Reconstructs the tangent space from a normal and a tangent
+* normal: The surface normal
+* tangent: The surface tangent
+* sigma: Defines the handedness of the tangent space matrix. 1.0 if it is right handend. -1.0 if it is left handed
+*/
+float3x3 ConstructTangentSpace(float3 normal, float3 tangent, float3 sigma)
+{
+    float3 n = normalize(normal);
+    float3 t = normalize(tangent - n * dot(tangent, n));
+    float3 b = cross(n, t) * sigma;
+    
+    return float3x3(t, b, n);
+}
+
+/**
+ * Calculates the luminance of an rgb-value.
+ * @param rgb The rgb color.
+ * @return The luminance of the given rgb color.
+ */
+float ColorToLuminance(float3 rgb)
+{
+    return rgb.r * 0.212639 + rgb.g * 0.715169 + rgb.b * 0.072192;    
+}
+
+/**
+ * Extrancts the handedness of the bitangent that is encoded in the z-component of the tangent.
+ * @param tangentz The z-component of the tangent with the handedness encoded.
+ * @return The handedness of the bitangent (bitangent = handedness * tangent x normal)
+ */
+float GetBitangentHandedness(float tangentz)
+{
+	// handedness is in least significant bit of tangent.z
+    uint z = asuint(tangentz);
+    return (z & 1) > 0 ? 1.0 : -1.0;
+}

GlitchyEditor/content/Shaders/myEffect.hlsl

@@ -1,9 +1,21 @@
+Texture2D AlbedoTexture : register(t0);
+SamplerState AlbedoSampler : register(s0);
+
+Texture2D<float3> NormalTexture : register(t1);
+SamplerState NormalSampler : register(s1);
+
+Texture2D<float> MetallicTexture : register(t2);
+SamplerState MetallicSampler : register(s2);
+
+Texture2D<float> RoughnessTexture : register(t3);
+SamplerState RoughnessSampler : register(s3);
+
+// Texture2D<float> AmbientTexture : register(t4);
+// SamplerState AmbientSampler : register(s4);
+
 cbuffer SceneConstants
 {
-    float4x4 ViewProjection = float4x4(1, 0, 0, 0, 
+    float4x4 ViewProjection;
-        0, 1, 0, 0, 
-        0, 0, 1, 0, 
-        0, 0, 0, 1);
 }
 
 cbuffer ObjectConstants
@@ -13,7 +25,7 @@ cbuffer ObjectConstants
 
 cbuffer Constants
 {
-    float4 BaseColor = float4(1, 0, 1, 1);
+    //float4 BaseColor = float4(1, 0, 1, 1);
     //float3 LightDir = float3(0, 1, 0);
 }
 
@@ -21,13 +33,19 @@ struct VS_IN
 {
     float3 Position     : POSITION;
     float3 Normal       : NORMAL;
+    // Todo: Tangent.w... handedness
+	float3 Tangent      : TANGENT;
+	float2 TexCoord     : TEXCOORD;
 };
 
 struct PS_IN
 {
-    float4 Position : SV_POSITION;
+    float4 Position      : SV_POSITION;
-    float3 WorldPosition : TEXCOORD0;
+    float3 WorldPosition : WORLDPOSITION;
-    float3 Normal   : NORMAL;
+    float3 Normal        : NORMAL;
+	float3 Tangent       : TANGENT;
+	float2 TexCoord      : TEXCOORD;
+	//nointerpolation float Handedness : HANDEDNESS;
 };
 
 PS_IN VS(VS_IN input)
@@ -36,36 +54,67 @@ PS_IN VS(VS_IN input)
 	
 	float4 worldPosition = mul(Transform, float4(input.Position, 1));
 	
-    output.Position = mul(ViewProjection, worldPosition);
+	output.Position = mul(ViewProjection, worldPosition);
     output.WorldPosition = worldPosition.xyz / worldPosition.w;
-    output.Normal = mul((float3x3)Transform, input.Normal);
+
+	output.Normal = mul(input.Normal, (float3x3)Transform);
+	output.Tangent = mul((float3x3)Transform, input.Tangent);
+	// TODO: output.Handedness = input.Tangent.w
+
+	output.TexCoord = input.TexCoord;
     
     return output;
 }
 
 struct PS_OUT
 {
-    float4 Color : SV_TARGET0;
+    float4 Albedo   : SV_TARGET0;
-    float4 Normal : SV_TARGET1;
+    // RG: TextureNormal.XY BA: GeoNrm.XY
-    float4 Position : SV_TARGET2;
+    float4 Normal   : SV_TARGET1;
+    // R: GeoNrm.Z GBA: GeoTan.XYZ
+    float4 Tangent   : SV_TARGET2;
+    float4 Position : SV_TARGET3;
+    // R: Metallicity G: Roughness B: Ambient
+    float4 Material : SV_TARGET4;
 };
 
 PS_OUT PS(PS_IN input)
 {
-    input.Normal = normalize(input.Normal);
+    // Build tangent space
+    float3 normal = normalize(input.Normal);
+    float3 tangent = normalize(input.Tangent - dot(input.Tangent, normal) * input.Normal);
+    // TODO: float3 bitangent = input.Handedness * cross(normal, tangent);
+    float3 bitangent = -cross(normal, tangent);
 
-    float f = distance(input.Normal, input.Normal);
+    float3x3 tangentTransform = float3x3(tangent, bitangent, normal);
+    //tangentTransform = transpose(tangentTransform);
 
-    //float shading = dot(LightDir, input.Normal);
+    float4 texAlbedo = AlbedoTexture.Sample(AlbedoSampler, input.TexCoord);
-    //float shading = dot(LightDir, LightDir) + 1;
+    float3 texNormal = NormalTexture.Sample(NormalSampler, input.TexCoord);
-    //shading = clamp(shading, 0.0f, 1.0f);
+    texNormal.xy = texNormal.xy * 2.0 - 1.0;
+    float texMetallic = MetallicTexture.Sample(MetallicSampler, input.TexCoord);
+    float texRoughness = RoughnessTexture.Sample(RoughnessSampler, input.TexCoord);
 
-    //return float4(BaseColor.rgb * shading, 1.0f);
+    //float3 objectNormal = mul(tangentTransform, texNormal);
+    //float3 worldNormal = mul(objectNormal, (float3x3)Transform);
 
-    PS_OUT output = (PS_OUT)0;
+
-    output.Color = BaseColor;
+/////////////TODO: REMOVEME
-    output.Normal = float4(input.Normal, 1);
+
-    output.Position = float4(input.WorldPosition, 1); 
+	//worldNormal = max(worldNormal - 10000000, normal);
+	//texAlbedo = max(texAlbedo - 10000000, 1.0);
+	//texMetallic = max(texMetallic - 10000000, 0.0);
+	//texRoughness = max(texRoughness - 10000000, 0.1);
+
+/////////////TODO: END_REMOVEME
+
+    PS_OUT output;
+    output.Albedo = texAlbedo;
+    //output.Normal = float4(objectNormal, 1.0);
+    output.Normal = float4(texNormal.xy, normal.xy);
+    output.Tangent = float4(normal.z, tangent.xyz);
+	output.Position = float4(input.WorldPosition, 1.0); 
+    output.Material = float4(texMetallic, texRoughness, 1.0, 0);
 
     return output;
 }

GlitchyEditor/content/Shaders/simpleLight.hlsl

@@ -1,12 +1,22 @@
-Texture2D Colors : register(t0);
+#define PI 3.14159265358979323846f
-Texture2D<float3> Normals : register(t1);
-Texture2D Positions : register(t2);
 
 SamplerState Sampler : register(s0);
 
+Texture2D GBuffer_Albedo : register(t0);
+Texture2D GBuffer_Normal : register(t1);
+Texture2D GBuffer_Tangent : register(t2);
+Texture2D GBuffer_Position : register(t3);
+Texture2D GBuffer_Material : register(t4);
+
 cbuffer Constants
 {
-    float3 LightDir = float3(0, 1, 0);
+	float3 LightColor;
+    float Illuminance;
+    float3 LightDir;
+
+    float3 CameraPos;
+
+	float2 Scaling;
 }
 
 struct VS_IN
@@ -26,21 +36,170 @@ PS_IN VS(VS_IN input)
     PS_IN output;
 	
     output.Position = float4(input.Position, 0, 1);
-    output.TexCoord = input.TexCoord;
+    output.TexCoord = input.TexCoord * Scaling;
     
     return output;
 }
 
+/**
+ * Normal Distribution Function. (Trowbridge-Reits GGX)
+ * Calculates the relative surface area of microfacets exactly aligned to the halfway vector.
+ * @param normal The surface normal.
+ * @param halfway The halfway vector between the surface normal and the view direction.
+ * @param roughness Roughness value.
+ * @returns The relative surface area of microfacets exactly aligned to the halfway vector.
+ */
+float NormalDistributionGGX(float3 normal, float3 halfway, float roughness)
+{
+	// Square roughness because it looks better
+	float a = roughness * roughness;
+	float aa = a * a;
+
+	float n_dot_h = max(dot(normal, halfway), 0.0f);
+
+	float denom = (n_dot_h * n_dot_h) * (aa - 1.0f) + 1.0f;
+	denom = PI * denom * denom;
+
+	return aa / denom;
+}
+
+/**
+ * Geometry Function calculating the overshadowing of microfacets based on roughness. (Schlick-Beckmann GGX).
+ * @param dot-product of normal vector and vector from surface to camera.
+ * @param k Roughness value.
+ */
+float GeometrySchlickGGX(float n_dot_v, float k)
+{
+	return n_dot_v / (n_dot_v * (1 - k) + k);
+}
+
+/**
+ * Geometry Function calculating the overshadowing of microfacets based on roughness. (Smith)
+ * @param normal The surface normal.
+ * @param viewDir Vector from surface to viewer.
+ * @param lightDir Vector from surface to light source.
+ * @param roughness Roughness value.
+ */
+float GeometrySmith(float3 normal, float3 viewDir, float3 lightDir, float roughness)
+{
+	// Direct lighting
+	float k = (roughness + 1.0f);
+	k = (k * k) / 8;
+	
+	// IBL
+	// float k = alpha * alpha / 2
+
+	float n_dot_v = max(dot(normal, viewDir), 0.0f);
+	float n_dot_l = max(dot(normal, lightDir), 0.0f);
+
+	return GeometrySchlickGGX(n_dot_v, k) * GeometrySchlickGGX(n_dot_l, k);
+}
+
+/**
+ * Calculates the fresnel value.
+ * @param h_dot_v Dot product of the normal and view direction
+ * @param F0 base reflectivity
+ */
+float3 FresnelSchlick(float cosTheta, float3 F0)
+{
+	return F0 + (1.0f - F0) * pow(clamp(1.0f - cosTheta, 0.0f, 1.0f), 5.0f);
+}
+
+/*
+* Reconstructs the z-component of a normalized normal vector from a two-component value
+* cnrm: The x- and y-components of a normalized normal vector
+*/
+float3 DecompressNormal(float2 cnrm)
+{
+	return float3(cnrm, sqrt(1.0 - cnrm.x * cnrm.x - cnrm.y * cnrm.y));
+}
+
 float4 PS(PS_IN input) : SV_TARGET
 {
-    float4 color = Colors.Sample(Sampler, input.TexCoord);
+    // Load Data from GBuffer
-    float3 normal = Normals.Sample(Sampler, input.TexCoord);
+    float4 rawAlbedo = GBuffer_Albedo.Sample(Sampler, input.TexCoord);
+	
+	float4 rawNormal = GBuffer_Normal.Sample(Sampler, input.TexCoord);
+	float4 rawTangent = GBuffer_Tangent.Sample(Sampler, input.TexCoord);
+	float4 rawPosition = GBuffer_Position.Sample(Sampler, input.TexCoord);
+	float4 rawMaterial = GBuffer_Material.Sample(Sampler, input.TexCoord);
 
-    //float shading = dot(LightDir, normal) + 100;
+	// Extract data from GBuffer
-    float shading = dot(float3(0, 1, 0), normal);
+	float3 albedo = rawAlbedo.rgb;
-    shading = clamp(shading, 0.0f, 1.0f);
+    //float3 surfaceNormal = normalize(rawNormal.xyz);
+    float3 worldPosition = rawPosition.xyz;
 
-    return float4(color.rgb * shading, 1);
+    float metallic = rawMaterial.r;
+    float roughness = rawMaterial.g;
+
+	float3 textureNormal = DecompressNormal(rawNormal.rg);
+	float3 rawGeoNrm = float3(rawNormal.ba, rawTangent.r);
+	float3 rawGeoTan = rawTangent.gba;
+
+	// Reconstruct normal space
+	float3 normal = normalize(rawGeoNrm);
+	float3 tangent = normalize(rawGeoTan - dot(rawGeoTan, normal) * normal);
+	float3 bitangent = -cross(normal, tangent);
+
+	float3x3 tangentTransform = float3x3(tangent, bitangent, normal);
+
+	float3 surfaceNormal = mul(textureNormal, tangentTransform);
+	
+	float3 lightDir = normalize(LightDir);
+	float3 viewDir = normalize(CameraPos - worldPosition.xyz);
+	float3 halfway = normalize(lightDir + viewDir);
+
+	float n_dot_v = max(dot(surfaceNormal, viewDir), 0.0f);
+	float n_dot_l = max(dot(surfaceNormal, lightDir), 0.0f);
+
+	float nrmDist = NormalDistributionGGX(surfaceNormal, halfway, roughness);
+	float geo = GeometrySmith(surfaceNormal, viewDir, lightDir, roughness);
+
+	float3 F0 = 0.04f;
+	F0 = lerp(F0, albedo, metallic);
+	float3 fresnel = FresnelSchlick(n_dot_v, F0);
+
+	// if (InspectNrmDist)
+	// 	return float4(nrmDist.xxx, 1);
+	// else if (InspectGeo)
+	// 	return float4(geo.xxx, 1);
+	// else if (InspectFresnel)
+	// 	return float4(fresnel, 1);
+	// else if (CookTorrance)
+	// {
+		float3 ks = fresnel;
+		float3 kd = 1.0f - ks;
+
+		// Metals have no diffuse light
+		kd *= 1.0f - metallic;
+
+		float3 diffuse = albedo / PI;
+		float3 specular = (nrmDist * fresnel * geo) / max(4 * n_dot_v * n_dot_l, 0.0001f);
+
+		float3 luminanceColor = LightColor * Illuminance;
+
+		float3 cook = (kd * diffuse + specular) * luminanceColor * n_dot_l;
+
+		float3 final = cook;
+
+		// Tone mapping	// TODO: do in postprocessing
+		final = final / (final + 1.0f);
+
+		// Gamma correction // TODO: do in postprocessing/hardware
+		final = pow(final, 1.0f / 2.2f);
+
+/////////////TODO: REMOVEME
+
+		//final = max(final - 10000000, nrmDist.xxx);
+		//final = max(final - 10000000, geo.xxx);
+		//final = max(final - 10000000, fresnel);
+		//final = max(final - 10000000, surfaceNormal / 2 + 0.5f);
+		//final = max(final - 10000000, abs(normal - surfaceNormal) / 2 + 0.5f);
+
+/////////////TODO: END_REMOVEME
+
+		return float4(final, 1);
+	//}
 }
 
 #effect[VS=VS,PS=PS]

GlitchyEditor/src/EditorLayer.bf

@@ -88,7 +88,8 @@ namespace GlitchyEditor
 				camera.FixedAspectRatio = false;
 				camera.RenderTarget = _viewportTarget;
 				let transform = _cameraEntity.GetComponent<TransformComponent>();
-				transform.Position = .(0, 0, -5);
+				transform.Position = .(-1.5f, 1.5f, -2.5f);
+				transform.RotationEuler = .(MathHelper.ToRadians(25), MathHelper.ToRadians(35), 0);
 
 				_cameraEntity.AddComponent<NativeScriptComponent>().Bind<EditorCameraController>();
 				_cameraEntity.AddComponent<EditorComponent>();
@@ -117,23 +118,42 @@ namespace GlitchyEditor
 		{
 			Effect myEffect = new Effect("content/Shaders/myEffect.hlsl")..ReleaseRefNoDelete();
 
-			Material mat = new Material(myEffect)..ReleaseRefNoDelete();
+			using (Texture2D albedo = new Texture2D("Textures/TestMat/rustediron2_albedo.png", true))
-			mat.SetVariable("BaseColor", Vector4(1, 0, 1, 1));
+			using (Texture2D normal = new Texture2D("Textures/TestMat/rustediron2_normal.png"))
-			//mat.SetVariable("LightDir", Vector3(1, 1, 0).Normalized());
+			using (Texture2D rough = new Texture2D("Textures/TestMat/rustediron2_roughness.png"))
+			using (Texture2D metal = new Texture2D("Textures/TestMat/rustediron2_metallic.png"))
+			{
+				albedo.SamplerState = SamplerStateManager.AnisotropicClamp;
+				normal.SamplerState = SamplerStateManager.AnisotropicClamp;
+				rough.SamplerState = SamplerStateManager.AnisotropicClamp;
+				metal.SamplerState = SamplerStateManager.AnisotropicClamp;
 
-			List<AnimationClip> clips = scope .();
+				Material mat = new Material(myEffect)..ReleaseRefNoDelete();
-
+				mat.SetTexture("AlbedoTexture", albedo);
-			ModelLoader.LoadModel("content/Models/plane.glb", myEffect, mat, _scene.[Friend]_ecsWorld, clips);
+				mat.SetTexture("NormalTexture", normal);
-			
+				mat.SetTexture("MetallicTexture", metal);
-			mat = new Material(myEffect)..ReleaseRefNoDelete();
+				mat.SetTexture("RoughnessTexture", rough);
-			mat.SetVariable("BaseColor", Vector4(1, 1, 0, 1));
+				//mat.SetVariable("BaseColor", Vector4(1, 0, 1, 1));
-			//mat.SetVariable("LightDir", Vector3(0, 1, 0).Normalized());
+				//mat.SetVariable("LightDir", Vector3(1, 1, 0).Normalized());
-
+	
-			clips = scope .();
+				List<AnimationClip> clips = scope .();
-
+	
-			ModelLoader.LoadModel("content/Models/plane.glb", myEffect, mat, _scene.[Friend]_ecsWorld, clips);
+				ModelLoader.LoadModel("content/Models/sphere.glb", myEffect, mat, _scene.[Friend]_ecsWorld, clips);
-
+				
-			ClearAndReleaseItems!(clips);
+				mat = new Material(myEffect)..ReleaseRefNoDelete();
+				mat.SetTexture("AlbedoTexture", albedo);
+				mat.SetTexture("NormalTexture", normal);
+				mat.SetTexture("MetallicTexture", metal);
+				mat.SetTexture("RoughnessTexture", rough);
+				//mat.SetVariable("BaseColor", Vector4(1, 1, 0, 1));
+				//mat.SetVariable("LightDir", Vector3(0, 1, 0).Normalized());
+	
+				clips = scope .();
+	
+				ModelLoader.LoadModel("content/Models/sphere.glb", myEffect, mat, _scene.[Friend]_ecsWorld, clips);
+	
+				ClearAndReleaseItems!(clips);
+			}
 		}
 
 		private void InitGraphics()

GlitchyEngine/src/Content/ModelLoader.bf

@@ -265,7 +265,7 @@ namespace GlitchyEngine.Content
 					StringView strView = .(attribute.Name);
 
 					// Remove number from end of name
-					while((*(strView.EndPtr - 1)).IsDigit)
+					while((*(strView.EndPtr - 1)).IsDigit || (*(strView.EndPtr - 1)) == '_')
 					{
 						strView.Length--;
 					}

GlitchyEngine/src/Renderer/Effect.bf

@@ -2,6 +2,7 @@ using System;
 using System.IO;
 using System.Collections;
 using GlitchyEngine.Core;
+using GlitchyEngine.Math;
 
 namespace GlitchyEngine.Renderer
 {

GlitchyEngine/src/Renderer/Renderer.bf

@@ -25,9 +25,17 @@ namespace GlitchyEngine.Renderer
 			private uint32 _height;
 			
 			public DepthStencilTarget DepthStencil;
-			public RenderTarget2D Color ~ _?.ReleaseRef();
+
+			// RGB: Albedo.rgb A: ?
+			public RenderTarget2D Albedo ~ _?.ReleaseRef();
+			// RGB: Normal.xyz(Worldspace) A: Ambient
 			public RenderTarget2D Normal ~ _?.ReleaseRef();
+			// ????
+			public RenderTarget2D Tangent ~ _?.ReleaseRef();
+			// RGB: Worldspace Position A: ?
 			public RenderTarget2D Position ~ _?.ReleaseRef();
+			// R: Metallicity G: Roughness B: Ambient A: ?
+			public RenderTarget2D Material ~ _?.ReleaseRef();
 
 			public void EnsureSize(uint32 width, uint32 height)
 			{
@@ -37,24 +45,32 @@ namespace GlitchyEngine.Renderer
 				if (_width == 0 || _height == 0)
 				{
 					// Note: Depth-Buffer in Color-Target for convenience
-					RenderTarget2DDescription colorDesc = .(.R8G8B8A8_UNorm, width, height, 1, 1, .D24_UNorm_S8_UInt);
+					RenderTarget2DDescription albedoDesc = .(.R8G8B8A8_UNorm, width, height, 1, 1, .D24_UNorm_S8_UInt);
-					Color = new RenderTarget2D(colorDesc);
+					Albedo = new RenderTarget2D(albedoDesc);
 
-					RenderTarget2DDescription normalDesc = .(.R32G32B32A32_Float, width, height);
+					RenderTarget2DDescription normalDesc = .(.R8G8B8A8_SNorm, width, height);
 					Normal = new RenderTarget2D(normalDesc);
+					
+					RenderTarget2DDescription tangentDesc = .(.R8G8B8A8_SNorm, width, height);
+					Tangent = new RenderTarget2D(tangentDesc);
 
 					RenderTarget2DDescription positionDesc = .(.R32G32B32A32_Float, width, height);
 					Position = new RenderTarget2D(positionDesc);
+
+					RenderTarget2DDescription materialDesc = .(.R8G8B8A8_UNorm, width, height);
+					Material = new RenderTarget2D(materialDesc);
 				}
 
 				_width = width;
 				_height = height;
 
-				Color.Resize(_width, _height);
+				Albedo.Resize(_width, _height);
 				Normal.Resize(_width, _height);
+				Tangent.Resize(_width, _height);
 				Position.Resize(_width, _height);
+				Material.Resize(_width, _height);
 
-				DepthStencil = Color.DepthStencilTarget;
+				DepthStencil = Albedo.DepthStencilTarget;
 			}
 
 			public void Bind()
@@ -62,12 +78,23 @@ namespace GlitchyEngine.Renderer
 				RenderCommand.SetDepthStencilTarget(DepthStencil);
 
 				RenderCommand.UnbindRenderTargets();
-				RenderCommand.SetRenderTarget(Color, 0);
+				RenderCommand.SetRenderTarget(Albedo, 0);
 				RenderCommand.SetRenderTarget(Normal, 1);
-				RenderCommand.SetRenderTarget(Position, 2);
+				RenderCommand.SetRenderTarget(Tangent, 2);
+				RenderCommand.SetRenderTarget(Position, 3);
+				RenderCommand.SetRenderTarget(Material, 4);
 
 				RenderCommand.BindRenderTargets();
 			}
+
+			public void Clear()
+			{
+				RenderCommand.Clear(_gBuffer.Albedo, .Color | .Depth, .HotPink, 1, 0);
+				RenderCommand.Clear(_gBuffer.Normal, .HotPink);
+				RenderCommand.Clear(_gBuffer.Tangent, .HotPink);
+				RenderCommand.Clear(_gBuffer.Position, .HotPink);
+				RenderCommand.Clear(_gBuffer.Material, .HotPink);
+			}
 		}
 
 		static internal GraphicsContext _context ~ _?.ReleaseRef();
@@ -85,6 +112,8 @@ namespace GlitchyEngine.Renderer
 		static GBuffer _gBuffer ~ delete _;
 		static Effect TestFullscreenEffect ~ _?.ReleaseRef();
 
+		static BlendState _gBufferBlend ~ _?.ReleaseRef();
+
 		public static void Init(GraphicsContext context, EffectLibrary effectLibrary)
 		{
 			Debug.Profiler.ProfileFunction!();
@@ -105,6 +134,8 @@ namespace GlitchyEngine.Renderer
 			InitDeferredRenderer(effectLibrary);
 
 			_gBuffer = new GBuffer();
+			BlendStateDescription gBufferBlendDesc = .Default;
+			_gBufferBlend = new BlendState(gBufferBlendDesc);
 		}
 
 		public static void Deinit()
@@ -152,10 +183,10 @@ namespace GlitchyEngine.Renderer
 			using(var quadVertices = new VertexBuffer(typeof(Vector4), 4, .Immutable))
 			{
 				Vector4[4] vertices = .(
-					.(-0.5f,-0.5f, 0, 1),
+					.(-1,-1, 0, 1),
-					.(-0.5f, 0.5f, 0, 0),
+					.(-1, 1, 0, 0),
-					.( 0.5f, 0.5f, 1, 0),
+					.( 1, 1, 1, 0),
-					.( 0.5f,-0.5f, 1, 1)
+					.( 1,-1, 1, 1)
 					);
 
 				quadVertices.SetData(vertices);
@@ -257,14 +288,16 @@ namespace GlitchyEngine.Renderer
 			// foreach camera:
 			// {
 			_gBuffer.EnsureSize(_sceneConstants.CameraTarget.Width, _sceneConstants.CameraTarget.Height);
+			_gBuffer.Clear();
 			_gBuffer.Bind();
-			RenderCommand.Clear(_gBuffer.Color, .Color | .Depth, .Blue, 1, 0);
+
-			RenderCommand.Clear(_gBuffer.Normal, Color.Beige);
+			RenderCommand.SetViewport(0, 0, _sceneConstants.CameraTarget.Width, _sceneConstants.CameraTarget.Height);
-			RenderCommand.Clear(_gBuffer.Position, Color.Black);
+
+			RenderCommand.SetBlendState(_gBufferBlend);
 			
-			/*RenderCommand.UnbindRenderTargets();
+			//RenderCommand.UnbindRenderTargets();
-			RenderCommand.SetRenderTarget(_sceneConstants.CameraTarget, 0, true);
+			//RenderCommand.SetRenderTarget(_sceneConstants.CameraTarget, 0, true);
-			RenderCommand.BindRenderTargets();*/
+			//RenderCommand.BindRenderTargets();
 
 			// TODO: Draw into GBuffer
 			for (SubmittedMesh entry in _queue)
@@ -281,14 +314,20 @@ namespace GlitchyEngine.Renderer
 			RenderCommand.UnbindRenderTargets();
 			RenderCommand.SetRenderTarget(_sceneConstants.CameraTarget, 0, true);
 			RenderCommand.BindRenderTargets();
+			
+			_gBuffer.Albedo.SamplerState = SamplerStateManager.PointClamp;
 
-			_gBuffer.Color.SamplerState = SamplerStateManager.PointClamp;
+			TestFullscreenEffect.SetTexture("GBuffer_Albedo", _gBuffer.Albedo);
+			TestFullscreenEffect.SetTexture("GBuffer_Normal", _gBuffer.Normal);
+			TestFullscreenEffect.SetTexture("GBuffer_Tangent", _gBuffer.Tangent);
+			TestFullscreenEffect.SetTexture("GBuffer_Position", _gBuffer.Position);
+			TestFullscreenEffect.SetTexture("GBuffer_Material", _gBuffer.Material);
 
-			TestFullscreenEffect.SetTexture("Colors", _gBuffer.Color);
+			TestFullscreenEffect.Variables["LightColor"].SetData(Vector3(1, 1, 1));
-			TestFullscreenEffect.SetTexture("Normals", _gBuffer.Normal);
+			TestFullscreenEffect.Variables["Illuminance"].SetData(5.0f);
-			//TestFullscreenEffect.SetTexture("Positions", _gBuffer.Position);
+			TestFullscreenEffect.Variables["LightDir"].SetData(Vector3(0, 1, 0));
-
+			TestFullscreenEffect.Variables["CameraPos"].SetData(_sceneConstants.CameraPosition);
-			//TestFullscreenEffect.SetVariable("LightDir");
+			TestFullscreenEffect.Variables["Scaling"].SetData(Vector2(_sceneConstants.CameraTarget.Width, _sceneConstants.CameraTarget.Height) / Vector2(_gBuffer.Albedo.Width, _gBuffer.Albedo.Height));
 
 			TestFullscreenEffect.Bind(_context);
 

GlitchyEngine/src/Renderer/Texture.bf

@@ -63,16 +63,16 @@ namespace GlitchyEngine.Renderer
 		//public override extern uint32 ArraySize {get;}
 		//public override extern uint32 MipLevels {get;}
 		
-		public this(StringView path)
+		public this(StringView path, bool pngSrgb = false)
 		{
 			_path = new String(path);
-			LoadTexture();
+			LoadTexture(pngSrgb);
 		}
 		
 		const String PngMagicWord = "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
 		const String DdsMagicWord = "DDS ";
 
-		private void LoadTexture()
+		private void LoadTexture(bool pngSrgb)
 		{
 			Debug.Profiler.ProfileResourceFunction!();
 
@@ -91,7 +91,7 @@ namespace GlitchyEngine.Renderer
 
 				if (strView.StartsWith(PngMagicWord))
 				{
-					LoadPng(data);
+					LoadPng(data, pngSrgb);
 				}
 				else if (strView.StartsWith(DdsMagicWord))
 				{
@@ -104,7 +104,7 @@ namespace GlitchyEngine.Renderer
 			}
 		}
 
-		protected void LoadPng(Stream stream)
+		protected void LoadPng(Stream stream, bool srgb)
 		{
 			Debug.Profiler.ProfileResourceFunction!();
 			
@@ -126,7 +126,7 @@ namespace GlitchyEngine.Renderer
 
 			// TODO: load as SRGB because PNGs are usually not stored as linear
 			//Texture2DDesc desc = .(width, height, .R8G8B8A8_UNorm_SRGB, 1, 1, .Immutable);
-			Texture2DDesc desc = .(width, height, .R8G8B8A8_UNorm, 1, 1, .Immutable);
+			Texture2DDesc desc = .(width, height, srgb? .R8G8B8A8_UNorm_SRGB : .R8G8B8A8_UNorm, 1, 1, .Immutable);
 			
 			PrepareTexturePlatform(desc, false);