Minor tweaks to normal maps

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@10672 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/shaders/normalmap.frag

@@ -27,12 +27,12 @@ void main()
 	float shininess ;
   
 	// compute ambient
-	vec4 ambientLight = vec4(0.3, 0.3, 0.3, 0.0);	
+	vec4 ambientLight = vec4(0.5, 0.5, 0.5, 1.0);	
 	
 	if (lamberFactor > 0.0)
 	{
 		diffuseMaterial = texture2D (DecalTex, gl_TexCoord[0].st);
-		diffuseLight  = vec4(0.7, 0.7, 0.7, 0.0);
+		diffuseLight  = vec4(0.5, 0.5, 0.5, 1.0);
 
 		gl_FragColor =	diffuseMaterial * diffuseLight * lamberFactor ;	
 	}

src/graphics/material.cpp

@@ -65,7 +65,7 @@ public:
         // We could calculate light direction as coming from the sun (then we'd need to
         // transform it into camera space). But I find that pretending light
         // comes from the camera gives good results
-        const float lightdir[] = {0.0f, 0.0f, -1.0f};
+        const float lightdir[] = {0.1852f, -0.1852f, -0.9259f};
         services->setVertexShaderConstant("lightdir", lightdir, 3);
     }
 };