Merge pull request 'normal map on ship' (#15) from fix_normal_map into master

Reviewed-on: #15

grk/project/Spaceship.h

@@ -36,8 +36,8 @@ public:
 	}
 
 	glm::vec3 color = glm::vec3(0.3, 0.3, 0.5);
-	float roughness = 0.2;
-	float metallic = 1.0;
+	float roughness = 0.5;
+	float metallic = 0.6;
 
 	glm::vec3 spaceshipPos /*= glm::vec3(0.065808f, 1.250000f, -2.189549f)*/;
 	glm::vec3 spaceshipDir = glm::vec3(-0.490263f, 0.000000f, 0.871578f);

grk/project/shaders/shader_tex.frag

@@ -102,8 +102,17 @@ void main()
 
     vec4 texColor = texture(textureSampler, TexCoords);
 
-    vec3 normal = normalize(texture(normalSampler, TexCoords).xyz * TBN);
+    
+    vec3 normalMapNormal = texture(normalSampler, TexCoords).xyz;
+    normalMapNormal = normalMapNormal * 2.0 - 1.0;
+    //normalMapNormal.y = -normalMapNormal.y;
+
+    vec3 normal = normalize(normalMapNormal * TBN );
+
+    //vec3 normal = normalize(texture(normalSampler, TexCoords).xyz * TBN);
     //vec3 normal = normalize(vecNormal);
+
+
     vec3 viewDir = normalize(cameraPos-worldPos);
 
     vec3 lightDirs[4];