Cleanup of vertex shader by @tmj.

2-channel normalmaps with Z-component reconstruction.
Normal vectors passed from fragment shaders to lightning calculations.

shaders/light_common.glsl

@@ -30,9 +30,11 @@ float calc_shadow()
 vec2 calc_light(vec3 light_dir)
 {
 #ifdef NORMALMAP
-	vec3 normal = normalize(f_tbn * normalize(texture(normalmap, f_coord).rgb * 2.0 - 1.0));
+	vec3 normal = normal;
 #elif defined(WATER)
 	vec3 normal = normal_d;
+#elif defined(PARALLAX)
+	vec3 normal = normal_p;
 #else
 	vec3 normal = normalize(f_normal);
 #endif

shaders/mat_normalmap.frag

@@ -33,6 +33,8 @@ uniform sampler2DShadow shadowmap;
 uniform samplerCube envmap;
 #endif
 
+vec3 normal;
+
 #define NORMALMAP
 #include <light_common.glsl>
 #include <tonemapping.glsl>
@@ -44,7 +46,10 @@ void main()
 	if (tex_color.a < opacity)
 		discard;
 
-	vec3 normal = normalize(f_tbn * normalize(texture(normalmap, f_coord).rgb * 2.0 - 1.0));
+	normal.xy = (texture(normalmap, f_coord).rg * 2.0 - 1.0);
+	normal.z = sqrt(1 - clamp((dot(normal.xy, normal.xy)), 0.0, 1.0));
+	normal = normalize(f_tbn * normalize(normal.xyz));
+	//vec3 normal = normalize(f_tbn * normalize(texture(normalmap, f_coord).rgb * 2.0 - 1.0));
 	vec3 refvec = reflect(f_pos.xyz, normal);
 #if ENVMAP_ENABLED
 	vec3 envcolor = texture(envmap, refvec).rgb;

shaders/mat_parallax.frag

@@ -35,7 +35,8 @@ uniform sampler2DShadow shadowmap;
 uniform samplerCube envmap;
 #endif
 
-#define NORMALMAP
+vec3 normal_p;
+#define PARALLAX
 #include <light_common.glsl>
 #include <tonemapping.glsl>
 
@@ -51,8 +52,11 @@ void main()
 
 	if (tex_color.a < opacity)
 		discard;
-	vec3 normal = normalize(f_tbn * normalize(texture(normalmap, f_coord_p).rgb * 2.0 - 1.0));
-	vec3 refvec = reflect(f_pos.xyz, normal);
+	vec3 normal = f_normal;
+	normal.xy = (texture(normalmap, f_coord_p).rg * 2.0 - 1.0);
+	normal.z = sqrt(1 - clamp((dot(normal.xy, normal.xy)), 0.0, 1.0));
+	normal_p = normalize(f_tbn * normalize(normal.xyz));
+	vec3 refvec = reflect(f_pos.xyz, normal_p);
 #if ENVMAP_ENABLED
 	vec3 envcolor = texture(envmap, refvec).rgb;
 #else

shaders/vertex.vert

@@ -8,20 +8,24 @@ flat out vec3 f_normal_raw;
 out vec2 f_coord;
 out vec4 f_pos;
 out mat3 f_tbn;
-out vec4 f_tangent;
+//out vec4 f_tangent;
 out vec4 f_light_pos;
-out vec3 TangentFragPos;
+
 out vec4 f_clip_pos;
 out vec4 f_clip_future_pos;
 
+//out vec3 TangentLightPos;
+//out vec3 TangentViewPos;
+out vec3 TangentFragPos;
+
 #include <common>
 
 void main()
 {
-	f_normal = modelviewnormal * v_normal;
+	f_normal = normalize(modelviewnormal * v_normal);
 	f_normal_raw = v_normal;
 	f_coord = v_coord;
-	f_tangent = v_tangent;
+//	f_tangent = v_tangent;
 	f_pos = modelview * vec4(v_vert, 1.0f);
 	f_light_pos = lightview * f_pos;
 	
@@ -32,9 +36,12 @@ void main()
 	gl_PointSize = param[1].x;
 
 	vec3 T = normalize(modelviewnormal * v_tangent.xyz);
-	vec3 B = normalize(modelviewnormal * cross(v_normal, v_tangent.xyz) * v_tangent.w);
-	vec3 N = normalize(modelviewnormal * v_normal);
+	vec3 N = f_normal;
+	vec3 B = normalize(cross(N, T));
 	f_tbn = mat3(T, B, N);
-	mat3 TBN = transpose(mat3(T, B, N));
+	
+	mat3 TBN = transpose(f_tbn);
+//	TangentLightPos = TBN * f_light_pos.xyz;
+//	TangentViewPos = TBN * vec3(0.0f, 0.0f, 0.0f);
 	TangentFragPos = TBN * f_pos.xyz;
 }