Fixed so that we could use DTX5nm as normal map

resources/Shaders/ForwardPlus.frag.glsl

@@ -1,8 +1,11 @@
 #version 430
 
+#include "Shaders/Util/CommonNormalFunc.glsl" 
+
 #define MIN_AMBIENT_LIGHT 0.3
 #define MAX_SPLITS 4
 
+
 uniform mat4 VM;
 uniform mat4 M;
 uniform mat4 V;
@@ -18,6 +21,7 @@ uniform vec3 CameraPosition;
 uniform int SSAOQuality;
 uniform float FarDistance[MAX_SPLITS];
 
+uniform int NormalTextureType;
 uniform vec2 DiffuseUVRepeat;
 uniform vec2 NormalUVRepeat;
 uniform vec2 SpecularUVRepeat;
@@ -140,13 +144,6 @@ LightResult CalcDirectionalLightSource(vec4 direction, vec4 color, float intensi
 	return result;
 }
 
-vec4 CalcNormalMappedValue(vec3 normal, vec3 tangent, vec3 bitangent, vec2 textureCoordinate, sampler2D normalMap)
-{
-	mat3 TBN = mat3(tangent, bitangent, normal);
-	vec3 NormalMap = texture(normalMap, textureCoordinate).xyz * 2.0 - vec3(1.0);
-	return vec4(TBN * normalize(NormalMap), 0.0);
-}
-
 // Returns a "random" value.
 float Random(vec3 seed, int i)
 {
@@ -303,7 +300,7 @@ void main()
 	vec4 glowTexel = texture2D(GlowMapTexture, Input.TextureCoordinate * GlowUVRepeat);
 	vec4 specularTexel = texture2D(SpecularMapTexture, Input.TextureCoordinate * SpecularUVRepeat);
 	vec4 position = VM * vec4(Input.Position, 1.0); 
-	vec4 normal = V * CalcNormalMappedValue(Input.Normal, Input.Tangent, Input.BiTangent, Input.TextureCoordinate * NormalUVRepeat, NormalMapTexture);
+	vec4 normal = V * CalcNormalMappedValue(Input.Normal, Input.Tangent, Input.BiTangent, Input.TextureCoordinate * NormalUVRepeat, NormalMapTexture, NormalTextureType);
 	normal = normalize(normal);
 	//vec4 normal = normalize(V  * vec4(Input.Normal, 0.0));
 	vec4 viewVec = normalize(-position);

resources/Shaders/ForwardPlusSplatMapRGB.frag.glsl

@@ -1,5 +1,7 @@
 #version 430
 
+#include "Shaders/Util/CommonNormalFunc.glsl" 
+
 #define MIN_AMBIENT_LIGHT 0.3
 #define MAX_SPLITS 4
 
@@ -20,6 +22,10 @@ layout (binding = 0) uniform sampler2D AOTexture;
 layout (binding = 30) uniform sampler2DArrayShadow DepthMap;
 
 //Get bineded at the same time as the textures
+uniform int NormalTextureType1;
+uniform int NormalTextureType2;
+uniform int NormalTextureType3;
+
 uniform vec2 DiffuseUVRepeat1;
 uniform vec2 DiffuseUVRepeat2;
 uniform vec2 DiffuseUVRepeat3;
@@ -182,11 +188,12 @@ vec4 CalcBlendedTexel(vec4 blendValue, sampler2D R, sampler2D G, sampler2D B,
 }
 
 vec4 CalcBlendedNormal(vec4 blendValue, sampler2D R, sampler2D G, sampler2D B,
-					   vec2 R_TileValues,  vec2 G_TileValues,  vec2 B_TileValues){
+					   vec2 R_TileValues,  vec2 G_TileValues,  vec2 B_TileValues
+					   int R_TextureType, int G_TextureType, int B_TextureType) {
 	mat3 TBN = mat3(Input.Tangent, Input.BiTangent, Input.Normal);
-	vec3 R_Channel = texture(R, Input.TextureCoordinate * R_TileValues).xyz * 2.0 - vec3(1.0);
-	vec3 G_Channel = texture(G, Input.TextureCoordinate * G_TileValues).xyz * 2.0 - vec3(1.0);
-	vec3 B_Channel = texture(B, Input.TextureCoordinate * B_TileValues).xyz * 2.0 - vec3(1.0);
+	vec3 R_Channel = NormalMapValue(Input.TextureCoordinate * R_TileValues, R, R_TextureType);
+	vec3 G_Channel = NormalMapValue(Input.TextureCoordinate * G_TileValues, G, G_TextureType);
+	vec3 B_Channel = NormalMapValue(Input.TextureCoordinate * B_TileValues, B, B_TextureType);
 
 	float total = blendValue.r + blendValue.g + blendValue.b + blendValue.a;
 	float totalDiv = 1 / total;
@@ -365,7 +372,8 @@ void main()
 	vec4 position = VM * vec4(Input.Position, 1.0); 
 	//vec4 normal = V * CalcNormalMappedValue(Input.Normal, Input.Tangent, Input.BiTangent, Input.TextureCoordinate, SplatMapTexture);
 	vec4 normal = V * CalcBlendedNormal(splatTexel, NormalMapTexture1, NormalMapTexture2, NormalMapTexture3,
-		   								NormalUVRepeat1, NormalUVRepeat2, NormalUVRepeat3);
+		   								NormalUVRepeat1, NormalUVRepeat2, NormalUVRepeat3,
+		   								NormalTextureType1, NormalTextureType2, NormalTextureType3);
 	normal = normalize(normal);
 	//vec4 normal = normalize(V  * vec4(Input.Normal, 0.0));
 	vec4 viewVec = normalize(-position); 

resources/Shaders/Util/CommonNormalFunc.glsl

@@ -0,0 +1,21 @@
+#define NORMAL_DDS 1
+#define NORMAL_PNG 2
+
+vec3 NormalMapValue(vec2 textureCoordinate, sampler2D normalMap, int normalTextureType){
+	if(normalTextureType == NORMAL_DDS){
+		vec3 normal;
+		normal.xy = texture(normalMap, textureCoordinate).wy * 2.0 - vec2(1.0);
+		normal.z = sqrt(1.0 -  clamp(dot(normal.xy, normal.xy), 0.0, 1.0));
+		return normal;
+	} else {
+		//should be PNG or anything that doesn't need special support
+		return texture(normalMap, textureCoordinate).xyz * 2.0 - vec3(1.0);
+	}
+}
+
+vec4 CalcNormalMappedValue(vec3 normal, vec3 tangent, vec3 bitangent, vec2 textureCoordinate, sampler2D normalMap, int normalTextureType)
+{
+	mat3 TBN = mat3(tangent, bitangent, normal);
+	vec3 NormalMap = NormalMapValue(textureCoordinate, normalMap, normalTextureType);
+	return vec4(TBN * normalize(NormalMap), 0.0);
+}