Normal maps generation on the fly.

Parallax mapping with slope information.
Overriding normal maps.

2 files changed, 127 insertions, 111 deletions

diff --git a/client/shaders/solids_shader/opengl_fragment.glsl b/client/shaders/solids_shader/opengl_fragment.glsl
index d81506a4f..6370bf505 100644
--- a/client/shaders/solids_shader/opengl_fragment.glsl
+++ b/client/shaders/solids_shader/opengl_fragment.glsl
@@ -1,90 +1,110 @@
-uniform sampler2D baseTexture;

-uniform sampler2D normalTexture;

-uniform sampler2D useNormalmap;

-

-uniform vec4 skyBgColor;

-uniform float fogDistance;

-uniform vec3 eyePosition;

-

-varying vec3 vPosition;

-varying vec3 eyeVec;

-

-#ifdef ENABLE_PARALLAX_OCCLUSION

-varying vec3 tsEyeVec;

-#endif

-

-const float e = 2.718281828459;

-

-void main (void)

-{

-	vec3 color;

-	vec2 uv = gl_TexCoord[0].st;

-

-#ifdef USE_NORMALMAPS

-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;

-#endif

-

-#ifdef ENABLE_PARALLAX_OCCLUSION

-	float height;

-	vec2 tsEye = vec2(tsEyeVec.x,-tsEyeVec.y);

-

-	if (use_normalmap > 0.0) {

-		float map_height = texture2D(normalTexture, uv).a;

-			if (map_height < 1.0){

-				float height = PARALLAX_OCCLUSION_SCALE * map_height - PARALLAX_OCCLUSION_BIAS;

-				uv = uv + height * tsEye;

-			}

-	}

-#endif

-

-/* Steep parallax code, for future use

-	if ((parallaxMappingMode == 2.0) && (use_normalmap > 0.0)) {

-		const float numSteps = 40.0;

-		float height = 1.0;

-		float step = 1.0 / numSteps;

-		vec4 NB = texture2D(normalTexture, uv);

-		vec2 delta = tsEye * parallaxMappingScale / numSteps;

-		for (float i = 0.0; i < numSteps; i++) {

-		if (NB.a < height) {

-			height -= step;

-			uv += delta;

-			NB = texture2D(normalTexture, uv);

-		} else {

-			break;

-		}

-		}

-	}

-*/

-

-#ifdef ENABLE_BUMPMAPPING

-	if (use_normalmap > 0.0) {

-		vec3 base = texture2D(baseTexture, uv).rgb;

-		vec3 vVec = normalize(eyeVec);

-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);

-		vec3 R = reflect(-vVec, bump);

-		vec3 lVec = normalize(vVec);

-		float diffuse = max(dot(lVec, bump), 0.0);

-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);

-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;

-	} else {

-		color = texture2D(baseTexture, uv).rgb;

-	}

-#else

-	color = texture2D(baseTexture, uv).rgb;

-#endif

-

-	float alpha = texture2D(baseTexture, uv).a;

-	vec4 col = vec4(color.r, color.g, color.b, alpha);

-	col *= gl_Color;

-	col = col * col; // SRGB -> Linear

-	col *= 1.8;

-	col.r = 1.0 - exp(1.0 - col.r) / e;

-	col.g = 1.0 - exp(1.0 - col.g) / e;

-	col.b = 1.0 - exp(1.0 - col.b) / e;

-	col = sqrt(col); // Linear -> SRGB

-	if(fogDistance != 0.0){

-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));

-		col = mix(col, skyBgColor, d);

-	}

-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);

-}

+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 tsEyeVec;
+varying vec3 lightVec;
+varying vec3 tsLightVec;
+
+bool normalTexturePresent = false; 
+
+const float e = 2.718281828459;
+ 
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+	
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		normalTexturePresent = true;
+	}
+#endif
+
+#ifdef ENABLE_PARALLAX_OCCLUSION
+	if (normalTexturePresent){
+		vec3 tsEye = normalize(tsEyeVec);
+		float height = PARALLAX_OCCLUSION_SCALE * texture2D(normalTexture, uv).a - PARALLAX_OCCLUSION_BIAS;
+		uv = uv + texture2D(normalTexture, uv).z * height * vec2(tsEye.x,-tsEye.y);
+	}
+#endif
+
+#ifdef USE_NORMALMAPS
+	if (normalTexturePresent){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	} 
+#endif
+		
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	vec4 col = vec4(color.rgb, base.a);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		col = mix(col, skyBgColor, d);
+	}
+    gl_FragColor = vec4(col.rgb, base.a);
+}
diff --git a/client/shaders/solids_shader/opengl_vertex.glsl b/client/shaders/solids_shader/opengl_vertex.glsl
index e359955d0..356ba2eb9 100644
--- a/client/shaders/solids_shader/opengl_vertex.glsl
+++ b/client/shaders/solids_shader/opengl_vertex.glsl
@@ -1,27 +1,33 @@
 uniform mat4 mWorldViewProj;

 uniform mat4 mInvWorld;

 uniform mat4 mTransWorld;

+uniform mat4 mWorld;

+

 uniform float dayNightRatio;

 

 uniform vec3 eyePosition;

 

 varying vec3 vPosition;

+varying vec3 worldPosition;

+

 varying vec3 eyeVec;

+varying vec3 lightVec;

 

-#ifdef ENABLE_PARALLAX_OCCLUSION

 varying vec3 tsEyeVec;

-#endif

+varying vec3 tsLightVec;

+

+const float BS = 10.0;

 

 void main(void)

 {

+	gl_TexCoord[0] = gl_MultiTexCoord0;

 	gl_Position = mWorldViewProj * gl_Vertex;

-	vPosition = (mWorldViewProj * gl_Vertex).xyz;

-	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;

+	vPosition = gl_Position.xyz;

+	worldPosition = (mWorld * gl_Vertex).xyz;

+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);

 

-#ifdef ENABLE_PARALLAX_OCCLUSION

-	vec3 normal,tangent,binormal;

+	vec3 normal, tangent, binormal;

 	normal = normalize(gl_NormalMatrix * gl_Normal);

-

 	if (gl_Normal.x > 0.5) {

 		//  1.0,  0.0,  0.0

 		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0, -1.0));

@@ -47,25 +53,20 @@ void main(void)
 		tangent  = normalize(gl_NormalMatrix * vec3(-1.0,  0.0,  0.0));

 		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));

 	}

-

 	mat3 tbnMatrix = mat3(	tangent.x, binormal.x, normal.x,

 							tangent.y, binormal.y, normal.y,

 							tangent.z, binormal.z, normal.z);

 

-	tsEyeVec = normalize(eyeVec * tbnMatrix);

-#endif

+	lightVec = sunPosition - worldPosition;

+	tsLightVec = lightVec * tbnMatrix;

+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;

+	tsEyeVec = eyeVec * tbnMatrix;

 

 	vec4 color;

-	//color = vec4(1.0, 1.0, 1.0, 1.0);

-

 	float day = gl_Color.r;

 	float night = gl_Color.g;

 	float light_source = gl_Color.b;

 

-	/*color.r = mix(night, day, dayNightRatio);

-	color.g = color.r;

-	color.b = color.r;*/

-

 	float rg = mix(night, day, dayNightRatio);

 	rg += light_source * 2.5; // Make light sources brighter

 	float b = rg;

@@ -90,13 +91,8 @@ void main(void)
 	color = color * color; // SRGB -> Linear

 	if(gl_Normal.y <= 0.5)

 		color *= 0.6;

-		//color *= 0.7;

 	color = sqrt(color); // Linear -> SRGB

-

 	color.a = gl_Color.a;

 

 	gl_FrontColor = gl_BackColor = color;

-

-	gl_TexCoord[0] = gl_MultiTexCoord0;

-

 }