Unite nodes shaders.

Pass drawtype and material type to shaders.
Move shaders generation to startup only.
Allow assign shaders per tile.
Initial code to support water surface shader.

2 files changed, 263 insertions, 0 deletions

diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
new file mode 100644
index 000000000..351faf81b
--- /dev/null
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -0,0 +1,128 @@
+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;
+const float BS = 10.0;
+ 
+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
+
+#if MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE
+	float alpha = gl_Color.a;
+	vec4 col = vec4(color.rgb, 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));
+		alpha = mix(alpha, 0.0, d);
+	}
+	gl_FragColor = vec4(col.rgb, alpha);
+#else
+	vec4 col = vec4(color.rgb, base.a);
+	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.rgb, base.a);
+#endif
+}
diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl
new file mode 100644
index 000000000..b09d03774
--- /dev/null
+++ b/client/shaders/nodes_shader/opengl_vertex.glsl
@@ -0,0 +1,135 @@
+uniform mat4 mWorldViewProj;

+uniform mat4 mInvWorld;

+uniform mat4 mTransWorld;

+uniform mat4 mWorld;

+

+uniform float dayNightRatio;

+uniform vec3 eyePosition;

+uniform float animationTimer;

+

+varying vec3 vPosition;

+varying vec3 worldPosition;

+

+varying vec3 eyeVec;

+varying vec3 lightVec;

+varying vec3 tsEyeVec;

+varying vec3 tsLightVec;

+

+const float e = 2.718281828459;

+const float BS = 10.0;

+

+float smoothCurve( float x ) {

+  return x * x *( 3.0 - 2.0 * x );

+}

+float triangleWave( float x ) {

+  return abs( fract( x + 0.5 ) * 2.0 - 1.0 );

+}

+float smoothTriangleWave( float x ) {

+  return smoothCurve( triangleWave( x ) ) * 2.0 - 1.0;

+}

+

+void main(void)

+{

+	gl_TexCoord[0] = gl_MultiTexCoord0;

+	

+#if (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER

+	vec4 pos = gl_Vertex;

+	pos.y -= 2.0;

+	pos.y -= sin (pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) * WATER_WAVE_HEIGHT

+		+ sin ((pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) / 7.0) * WATER_WAVE_HEIGHT;

+	gl_Position = mWorldViewProj * pos;

+#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES

+	vec4 pos = gl_Vertex;

+	vec4 pos2 = mWorld * gl_Vertex;

+	pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2.x * 0.01 + pos2.z * 0.01) * 2.0 - 1.0) * 0.4;

+	pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.2;

+	pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.4;

+	gl_Position = mWorldViewProj * pos;

+#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS

+	vec4 pos = gl_Vertex;

+	vec4 pos2 = mWorld * gl_Vertex;

+	if (gl_TexCoord[0].y < 0.05) {

+	pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2.x * 0.1 + pos2.z * 0.1) * 2.0 - 1.0) * 0.8;

+			pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2.x * -0.5 + pos2.z * -0.5) * 2.0 - 1.0) * 0.4;

+	}

+	gl_Position = mWorldViewProj * pos;

+#else

+	gl_Position = mWorldViewProj * gl_Vertex;

+#endif

+

+	vPosition = gl_Position.xyz;

+	worldPosition = (mWorld * gl_Vertex).xyz;

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

+

+	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));

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

+	} else if (gl_Normal.x < -0.5) {

+		// -1.0,  0.0,  0.0

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

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

+	} else if (gl_Normal.y > 0.5) {

+		//  0.0,  1.0,  0.0

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

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

+	} else if (gl_Normal.y < -0.5) {

+		//  0.0, -1.0,  0.0

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

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

+	} else if (gl_Normal.z > 0.5) {

+		//  0.0,  0.0,  1.0

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

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

+	} else if (gl_Normal.z < -0.5) {

+		//  0.0,  0.0, -1.0

+		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);

+

+	lightVec = sunPosition - worldPosition;

+	tsLightVec = lightVec * tbnMatrix;

+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;

+	tsEyeVec = eyeVec * tbnMatrix;

+

+	vec4 color;

+	float day = gl_Color.r;

+	float night = gl_Color.g;

+	float light_source = gl_Color.b;

+

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

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

+	float b = rg;

+

+	// Moonlight is blue

+	b += (day - night) / 13.0;

+	rg -= (day - night) / 23.0;

+

+	// Emphase blue a bit in darker places

+	// See C++ implementation in mapblock_mesh.cpp finalColorBlend()

+	b += max(0.0, (1.0 - abs(b - 0.13)/0.17) * 0.025);

+

+	// Artificial light is yellow-ish

+	// See C++ implementation in mapblock_mesh.cpp finalColorBlend()

+	rg += max(0.0, (1.0 - abs(rg - 0.85)/0.15) * 0.065);

+

+	color.r = clamp(rg,0.0,1.0);

+	color.g = clamp(rg,0.0,1.0);

+	color.b = clamp(b,0.0,1.0);

+

+#if !(MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE)

+	// Make sides and bottom darker than the top

+	color = color * color; // SRGB -> Linear

+	if(gl_Normal.y <= 0.5)

+		color *= 0.6;

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

+#endif

+

+	color.a = gl_Color.a;

+	gl_FrontColor = gl_BackColor = color;

+}