re-add physics mod ocean support. tweak refraction strength falloff with distance

shaders/dimensions/all_translucent.fsh

@@ -153,6 +153,11 @@ uniform float waterEnteredAltitude;
 #include "/lib/specular.glsl"
 #include "/lib/diffuse_lighting.glsl"
 
+#if defined PHYSICSMOD_OCEAN_SHADER
+	#include "/lib/oceans.glsl"
+#endif
+
+
 float interleaved_gradientNoise_temporal(){
 	#ifdef TAA
 		return fract(52.9829189*fract(0.06711056*gl_FragCoord.x + 0.00583715*gl_FragCoord.y ) + 1.0/1.6180339887 * frameCounter);
@@ -395,9 +400,12 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 	
 	vec3 FragCoord = gl_FragCoord.xyz;
 
-	vec2 tempOffset = offsets[framemod8];
+	#ifdef TAA
-
+		vec2 tempOffset = offsets[framemod8];
-	vec3 viewPos = toScreenSpace(FragCoord*vec3(texelSize/RENDER_SCALE,1.0)-vec3(vec2(tempOffset)*texelSize*0.5, 0.0));
+		vec3 viewPos = toScreenSpace(FragCoord*vec3(texelSize/RENDER_SCALE,1.0)-vec3(vec2(tempOffset)*texelSize*0.5, 0.0));
+	#else
+		vec3 viewPos = toScreenSpace(FragCoord*vec3(texelSize/RENDER_SCALE,1.0));
+	#endif
 
 	vec3 feetPlayerPos = mat3(gbufferModelViewInverse) * viewPos;
 ////////////////////////////////////////////////////////////////////////////////
@@ -465,9 +473,31 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 
 	vec3 normal = normalMat.xyz; // in viewSpace
 
+	#if defined PHYSICSMOD_OCEAN_SHADER && defined PHYSICS_OCEAN
+		WavePixelData wave = physics_wavePixel(physics_localPosition.xz, physics_localWaviness, physics_iterationsNormal, physics_gameTime);
+		
+		#if defined DISTANT_HORIZONS
+			float PHYSICS_OCEAN_TRANSITION = 1.0-pow(1.0-pow(1.0-clamp(1.0-length(feetPlayerPos.xz)/max(far,0.0),0,1),5),5);
+		#else
+			float PHYSICS_OCEAN_TRANSITION = 0.0;
+		#endif
+
+		if (isWater){
+			if (!gl_FrontFacing) {
+   			    wave.normal = -wave.normal;
+   			}
+
+			normal = mix(normalize(gl_NormalMatrix * wave.normal),  normal, PHYSICS_OCEAN_TRANSITION);
+
+		
+			Albedo = mix(Albedo, vec3(1.0), wave.foam);
+			gl_FragData[0].a = mix(1.0/255.0, 1.0, wave.foam);
+		}
+	#endif
+
 	#ifdef LARGE_WAVE_DISPLACEMENT
 		if (isWater){
-			normal = viewToWorld(normal) ;
+			normal = viewToWorld(normal);
 			normal.xz = shitnormal.xy;
 			normal = worldToView(normal);
 		}
@@ -485,7 +515,7 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 	NormalTex.xy = NormalTex.xy*2.0-1.0;
 	NormalTex.z = clamp(sqrt(1.0 - dot(NormalTex.xy, NormalTex.xy)),0.0,1.0);
 
-	#ifndef HAND
+	#if !defined HAND
 		if (isWater){
 			vec3 playerPos = (mat3(gbufferModelViewInverse) * viewPos + gbufferModelViewInverse[3].xyz);
 			vec3 waterPos = playerPos;
@@ -511,10 +541,18 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 	// tangent space normals for refraction
 	TangentNormal = NormalTex.xy;
 	
-	normal = applyBump(tbnMatrix, NormalTex.xyz, 1.0);
+	#if defined PHYSICSMOD_OCEAN_SHADER && defined PHYSICS_OCEAN
-	worldSpaceNormal = normalize(viewToWorld(normal).xyz);
+		normal = applyBump(tbnMatrix, NormalTex.xyz, PHYSICS_OCEAN_TRANSITION);
+	#else
+		normal = applyBump(tbnMatrix, NormalTex.xyz, 1.0);
+	#endif
+
+	worldSpaceNormal = viewToWorld(normal);
+	
+	#if defined PHYSICSMOD_OCEAN_SHADER && defined PHYSICS_OCEAN
+		if (isWater) TangentNormal = normalize(wave.normal).xz;
+	#endif
 
-	// TangentNormal = clamp(TangentNormal + (blueNoise()*2.0-1.0)*0.005,-1.0,1.0);
 	float nameTagMask = 0.0;
 
 	#if defined ENTITIES && defined IS_IRIS
@@ -679,6 +717,7 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 		// if nothing is chosen, no smoothness and no reflectance
 		vec2 specularValues = vec2(1.0, 0.0); 
 
+		
 		// hardcode specular values for select blocks like glass, water, and slime
 		if(isReflective) specularValues = vec2(1.0, harcodedF0);
 
@@ -708,7 +747,6 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 				float Shadows = 0.0;
 			#endif
 			
-			
 			vec3 specularReflections = specularReflections(viewPos, normalize(feetPlayerPos), WsunVec, vec3(blueNoise(), vec2(interleaved_gradientNoise_temporal())), worldSpaceNormal, roughness, f0, Albedo, FinalColor*gl_FragData[0].a, DirectLightColor * Shadows, lightmap.y, isHand, isWater, reflectance, flashLightSpecularData);
 			
 			gl_FragData[0].a = gl_FragData[0].a + (1.0-gl_FragData[0].a) * reflectance;
@@ -749,7 +787,7 @@ if (gl_FragCoord.x * texelSize.x < 1.0  && gl_FragCoord.y * texelSize.y < 1.0 )
 		if(gl_FragCoord.x*texelSize.x < 0.47) gl_FragData[0] = vec4(0.0);
 	#endif
 	#if DEBUG_VIEW == debug_NORMALS
-		gl_FragData[0].rgb = worldSpaceNormal * 0.1;
+		gl_FragData[0].rgb = vec3(worldSpaceNormal.x,worldSpaceNormal.y*0,worldSpaceNormal.z*0) * 0.1;
 		gl_FragData[0].a = 1;
 	#endif
 	#if DEBUG_VIEW == debug_INDIRECT

shaders/dimensions/all_translucent.vsh

@@ -6,6 +6,10 @@
 uniform float frameTimeCounter;
 #include "/lib/Shadow_Params.glsl"
 
+#if defined PHYSICSMOD_OCEAN_SHADER
+	#include "/lib/oceans.glsl"
+#endif
+
 /*
 !! DO NOT REMOVE !!
 This code is from Chocapic13' shaders
@@ -111,12 +115,25 @@ vec3 getWaveNormal(vec3 posxz, float range){
 
 void main() {
 
+	#if defined PHYSICSMOD_OCEAN_SHADER && defined PHYSICS_OCEAN
+    	// basic texture to determine how shallow/far away from the shore the water is
+    	physics_localWaviness = texelFetch(physics_waviness, ivec2(gl_Vertex.xz) - physics_textureOffset, 0).r;
+    	// transform gl_Vertex (since it is the raw mesh, i.e. not transformed yet)
+    	vec4 finalPosition = vec4(gl_Vertex.x, gl_Vertex.y + physics_waveHeight(gl_Vertex.xz, PHYSICS_ITERATIONS_OFFSET, physics_localWaviness, physics_gameTime), gl_Vertex.z, gl_Vertex.w);
+    	// pass this to the fragment shader to fetch the texture there for per fragment normals
+    	physics_localPosition = finalPosition.xyz;
+
+		vec3 position = mat3(gl_ModelViewMatrix) * vec3(finalPosition) + gl_ModelViewMatrix[3].xyz;
+	#else
+		vec3 position = mat3(gl_ModelViewMatrix) * vec3(gl_Vertex) + gl_ModelViewMatrix[3].xyz;
+	#endif
+
 	// lmtexcoord.xy = (gl_MultiTexCoord0).xy;
 	lmtexcoord.xy = (gl_TextureMatrix[0] * gl_MultiTexCoord0).xy;
 	vec2 lmcoord = gl_MultiTexCoord1.xy / 240.0;
 	lmtexcoord.zw = lmcoord;
 
- 	vec3 position = mat3(gl_ModelViewMatrix) * vec3(gl_Vertex) + gl_ModelViewMatrix[3].xyz;
+
 
 	#ifdef LARGE_WAVE_DISPLACEMENT
 		if(mc_Entity.x == 8.0) {
@@ -184,8 +201,8 @@ void main() {
 	binormal = normalize(cross(tangent2.rgb,normalMat.xyz)*at_tangent.w);
 
 	mat3 tbnMatrix = mat3(tangent2.x, binormal.x, normalMat.x,
-								  tangent2.y, binormal.y, normalMat.y,
+						  tangent2.y, binormal.y, normalMat.y,
-						     	  tangent2.z, binormal.z, normalMat.z);
+						  tangent2.z, binormal.z, normalMat.z);
 	
 	flatnormal = normalMat.xyz;
 

shaders/dimensions/composite3.fsh

@@ -190,7 +190,7 @@ vec3 doRefractionEffect( inout vec2 texcoord, vec2 normal, float linearDistance,
   // make the tangent space normals match the directions of the texcoord UV, this greatly improves the refraction effect.
   vec2 UVNormal = vec2(normal.x,-normal.y);
   
-  float refractionMult = 0.3 / (1.0 + linearDistance);
+  float refractionMult = 0.3 / (1.0 + linearDistance*0.5);
   float diffractionMult = 0.035;
   float smudgeMult = 1.0;
 

shaders/lib/oceans.glsl

@@ -0,0 +1,232 @@
+// THIS FILE IS PUBLIC DOMAIN SO USE IT HOWEVER YOU WANT!
+// to make it compatible with your shaderpack use:
+#define PHYSICS_OCEAN_SUPPORT
+// at the top of your file. When used my mod no longer injects code into
+// your shaderpack. It replaces this define statement (before compilation) with
+#define PHYSICS_OCEAN
+// so you can use
+#ifdef PHYSICS_OCEAN
+#endif
+
+// #ifdef PhysicsMod_support
+// to customize the water for the physics ocean 
+// just some basic consts for the wave function based on afl_ext's shader https://www.shadertoy.com/view/Xdlczl
+// the overall shape must stay consistent because it is also computed on the CPU side
+// to offset entities (though a custom CPU integration of your shader is possible by
+// contacting me on my discord server https://discord.gg/VsNs9xP)
+const int PHYSICS_ITERATIONS_OFFSET = 13;
+const float PHYSICS_DRAG_MULT = 0.048;
+const float PHYSICS_XZ_SCALE = 0.035;
+const float PHYSICS_TIME_MULTIPLICATOR = 0.45;
+const float PHYSICS_W_DETAIL = 0.75;
+const float PHYSICS_FREQUENCY = 6.0;
+const float PHYSICS_SPEED = 2.0;
+const float PHYSICS_WEIGHT = 0.8;
+const float PHYSICS_FREQUENCY_MULT = 1.18;
+const float PHYSICS_SPEED_MULT = 1.07;
+const float PHYSICS_ITER_INC = 12.0;
+const float PHYSICS_NORMAL_STRENGTH = 0.6;
+
+// this is the surface detail from the physics options, ranges from 13 to 48 (yeah I know weird)
+uniform int physics_iterationsNormal;
+// used to offset the 0 point of wave meshes to keep the wave function consistent even
+// though the mesh totally changes
+uniform vec2 physics_waveOffset;
+// used for offsetting the local position to fetch the right pixel of the waviness texture
+uniform ivec2 physics_textureOffset;
+// time in seconds that can go faster dependent on weather conditions (affected by weather strength
+// multiplier in ocean settings
+uniform float physics_gameTime;
+// base value is 13 and gets multiplied by wave height in ocean settings
+uniform float physics_oceanHeight;
+// basic texture to determine how shallow/far away from the shore the water is
+uniform sampler2D physics_waviness;
+// basic scale for the horizontal size of the waves
+uniform float physics_oceanWaveHorizontalScale;
+// used to offset the model to know the ripple position
+uniform vec3 physics_modelOffset;
+// used for offsetting the ripple texture
+uniform float physics_rippleRange;
+// controlling how much foam generates on the ocean
+uniform float physics_foamAmount;
+// controlling the opacity of the foam
+uniform float physics_foamOpacity;
+// texture containing the ripples (basic bump map)
+uniform sampler2D physics_ripples;
+// foam noise
+uniform sampler3D physics_foam;
+// just the generic minecraft lightmap, you can remove this and use the one supplied by Optifine/Iris
+uniform sampler2D physics_lightmap;
+
+#if defined PHYSICSMOD_VERTEX
+    // for the vertex shader stage
+    out vec3 physics_localPosition;
+    out float physics_localWaviness;
+#endif
+
+#if defined PHYSICSMOD_FRAGMENT
+    // for the fragment shader stage
+    in vec3 physics_localPosition;
+    in float physics_localWaviness;
+#endif
+
+float physics_waveHeight(vec2 position, int iterations, float factor, float time) {
+    position = (position - physics_waveOffset) * PHYSICS_XZ_SCALE * physics_oceanWaveHorizontalScale;
+    float iter = 0.0;
+    float frequency = PHYSICS_FREQUENCY;
+    float speed = PHYSICS_SPEED;
+    float weight = 1.0;
+    float height = 0.0;
+    float waveSum = 0.0;
+    float modifiedTime = time * PHYSICS_TIME_MULTIPLICATOR;
+    
+    for (int i = 0; i < iterations; i++) {
+        vec2 direction = vec2(sin(iter), cos(iter));
+        float x = dot(direction, position) * frequency + modifiedTime * speed;
+        float wave = exp(sin(x) - 1.0);
+        float result = wave * cos(x);
+        vec2 force = result * weight * direction;
+        
+        position -= force * PHYSICS_DRAG_MULT;
+        height += wave * weight;
+        iter += PHYSICS_ITER_INC;
+        waveSum += weight;
+        weight *= PHYSICS_WEIGHT;
+        frequency *= PHYSICS_FREQUENCY_MULT;
+        speed *= PHYSICS_SPEED_MULT;
+    }
+    
+    return height / waveSum * physics_oceanHeight * factor - physics_oceanHeight * factor * 0.5;
+}
+
+vec2 physics_waveDirection(vec2 position, int iterations, float time) {
+    position = (position - physics_waveOffset) * PHYSICS_XZ_SCALE * physics_oceanWaveHorizontalScale;
+    float iter = 0.0;
+    float frequency = PHYSICS_FREQUENCY;
+    float speed = PHYSICS_SPEED;
+    float weight = 1.0;
+    float waveSum = 0.0;
+    float modifiedTime = time * PHYSICS_TIME_MULTIPLICATOR;
+    vec2 dx = vec2(0.0);
+    
+    for (int i = 0; i < iterations; i++) {
+        vec2 direction = vec2(sin(iter), cos(iter));
+        float x = dot(direction, position) * frequency + modifiedTime * speed;
+        float wave = exp(sin(x) - 1.0);
+        float result = wave * cos(x);
+        vec2 force = result * weight * direction;
+        
+        dx += force / pow(weight, PHYSICS_W_DETAIL); 
+        position -= force * PHYSICS_DRAG_MULT;
+        iter += PHYSICS_ITER_INC;
+        waveSum += weight;
+        weight *= PHYSICS_WEIGHT;
+        frequency *= PHYSICS_FREQUENCY_MULT;
+        speed *= PHYSICS_SPEED_MULT;
+    }
+    
+    return vec2(dx / pow(waveSum, 1.0 - PHYSICS_W_DETAIL));
+}
+
+vec3 physics_waveNormal(const in vec2 position, const in vec2 direction, const in float factor, const in float time) {
+    float oceanHeightFactor = physics_oceanHeight / 13.0;
+    float totalFactor = oceanHeightFactor * factor;
+    vec3 waveNormal = normalize(vec3(direction.x * totalFactor, PHYSICS_NORMAL_STRENGTH, direction.y * totalFactor));
+    
+    vec2 eyePosition = position + physics_modelOffset.xz;
+    vec2 rippleFetch = (eyePosition + vec2(physics_rippleRange)) / (physics_rippleRange * 2.0);
+    vec2 rippleTexelSize = vec2(2.0 / textureSize(physics_ripples, 0).x, 0.0);
+    float left = texture(physics_ripples, rippleFetch - rippleTexelSize.xy).r;
+    float right = texture(physics_ripples, rippleFetch + rippleTexelSize.xy).r;
+    float top = texture(physics_ripples, rippleFetch - rippleTexelSize.yx).r;
+    float bottom = texture(physics_ripples, rippleFetch + rippleTexelSize.yx).r;
+    float totalEffect = left + right + top + bottom;
+    
+    float normalx = left - right;
+    float normalz = top - bottom;
+    vec3 rippleNormal = normalize(vec3(normalx, 1.0, normalz));
+    return normalize(mix(waveNormal, rippleNormal, pow(totalEffect, 0.5)));
+}
+
+struct WavePixelData {
+    vec2 direction;
+    vec2 worldPos;
+    vec3 normal;
+    float foam;
+    float height;
+};
+
+WavePixelData physics_wavePixel(const in vec2 position, const in float factor, const in float iterations, const in float time) {
+    vec2 wavePos = (position.xy - physics_waveOffset) * PHYSICS_XZ_SCALE * physics_oceanWaveHorizontalScale;
+    float iter = 0.0;
+    float frequency = PHYSICS_FREQUENCY;
+    float speed = PHYSICS_SPEED;
+    float weight = 1.0;
+    float height = 0.0;
+    float waveSum = 0.0;
+    float modifiedTime = time * PHYSICS_TIME_MULTIPLICATOR;
+    vec2 dx = vec2(0.0);
+    
+    for (int i = 0; i < iterations; i++) {
+        vec2 direction = vec2(sin(iter), cos(iter));
+        float x = dot(direction, wavePos) * frequency + modifiedTime * speed;
+        float wave = exp(sin(x) - 1.0);
+        float result = wave * cos(x);
+        vec2 force = result * weight * direction;
+        
+        dx += force / pow(weight, PHYSICS_W_DETAIL); 
+        wavePos -= force * PHYSICS_DRAG_MULT;
+        height += wave * weight;
+        iter += PHYSICS_ITER_INC;
+        waveSum += weight;
+        weight *= PHYSICS_WEIGHT;
+        frequency *= PHYSICS_FREQUENCY_MULT;
+        speed *= PHYSICS_SPEED_MULT;
+    }
+    
+    WavePixelData data;
+    data.direction = -vec2(dx / pow(waveSum, 1.0 - PHYSICS_W_DETAIL));
+    data.worldPos = wavePos / physics_oceanWaveHorizontalScale / PHYSICS_XZ_SCALE;
+    data.height = height / waveSum * physics_oceanHeight * factor - physics_oceanHeight * factor * 0.5;
+    
+    data.normal = physics_waveNormal(position, data.direction, factor, time) ;
+
+    float waveAmplitude = data.height * pow(max(data.normal.y, 0.0), 4.0);
+    vec2 waterUV = mix(position - physics_waveOffset, data.worldPos, clamp(factor * 2.0, 0.2, 1.0));
+    vec2 s1 = textureLod(physics_foam, vec3(waterUV * 0.26, time / 360.0), 0).rg;
+    vec2 s2 = textureLod(physics_foam, vec3(waterUV * 0.02, time / 360.0 + 0.5), 0).rg;
+    vec2 s3 = textureLod(physics_foam, vec3(waterUV * 0.1, time / 360.0 + 1.0), 0).rg;
+    
+    float waterSurfaceNoise = s1.r * s2.r * s3.r * 2.8 * physics_foamAmount;
+    waveAmplitude = clamp(waveAmplitude * 1.2, 0.0, 1.0);
+    waterSurfaceNoise = (1.0 - waveAmplitude) * waterSurfaceNoise + waveAmplitude * physics_foamAmount;
+    
+    float worleyNoise = 0.2 + 0.8 * s1.g * (1.0 - s2.g);
+    float waterFoamMinSmooth = 0.45;
+    float waterFoamMaxSmooth = 2.0;
+    waterSurfaceNoise = smoothstep(waterFoamMinSmooth, 1.0, waterSurfaceNoise) * worleyNoise;
+    
+    data.foam = clamp(waterFoamMaxSmooth * waterSurfaceNoise * physics_foamOpacity, 0.0, 1.0);
+    
+    return data;
+}
+/*
+// VERTEX STAGE
+void main() {
+    // basic texture to determine how shallow/far away from the shore the water is
+    physics_localWaviness = texelFetch(physics_waviness, ivec2(gl_Vertex.xz) - physics_textureOffset, 0).r;
+    // transform gl_Vertex (since it is the raw mesh, i.e. not transformed yet)
+    vec4 finalPosition = vec4(gl_Vertex.x, gl_Vertex.y + physics_waveHeight(gl_Vertex.xz, PHYSICS_ITERATIONS_OFFSET, physics_localWaviness, physics_gameTime), gl_Vertex.z, gl_Vertex.w);
+    // pass this to the fragment shader to fetch the texture there for per fragment normals
+    physics_localPosition = finalPosition.xyz;
+    
+    // now use finalPosition instead of gl_Vertex
+}
+
+// FRAGMENT STAGE
+void main() {
+    WavePixelData wave = physics_wavePixel(physics_localPosition.xz, physics_localWaviness, physics_iterationsNormal, physics_gameTime);
+    
+    // access the wave struct data however you want, wave.normal is in world space, wave.foam is the final foam amount
+}
+*/

shaders/lib/specular.glsl

@@ -119,7 +119,7 @@ vec3 rayTraceSpeculars(vec3 dir, vec3 position, float dither, float quality, boo
 
 	vec3 spos = clipPosition*vec3(RENDER_SCALE,1.0) + stepv*(dither-0.5);
 	
-	#ifdef DEFERRED_SPECULAR
+	#if defined DEFERRED_SPECULAR && defined TAA
 		spos.xy += TAA_Offset*texelSize*0.5/RENDER_SCALE;
 	#endif
 
@@ -130,12 +130,9 @@ vec3 rayTraceSpeculars(vec3 dir, vec3 position, float dither, float quality, boo
 
 		float sp = invLinZ(sqrt(texelFetch2D(colortex4,ivec2(spos.xy/texelSize/4.0),0).a/65000.0));
 		
-		// if(hand) convertHandDepth(sp);
-		
 		float currZ = linZ(spos.z);
 		float nextZ = linZ(sp);
 
-		// if(abs(nextZ-currZ) < mix(0.005,0.5,currZ*currZ) && sp < max(minZ,maxZ) && sp > min(minZ,maxZ)) return vec3(spos.xy/RENDER_SCALE,sp);
 		if(sp < max(minZ,maxZ) && sp > min(minZ,maxZ)) return vec3(spos.xy/RENDER_SCALE,sp);
 
 		minZ = maxZ-biasAmount / currZ;
@@ -162,7 +159,7 @@ vec4 screenSpaceReflections(
 	vec4 reflection = vec4(0.0);
 	
 	float reflectionLength = 0.0;
-	float quality = 30.0f;//mix(10.0f, 30.0f, fresnel);
+	float quality = 30.0f;
 
 	vec3 raytracePos = rayTraceSpeculars(reflectedVector, viewPos, noise, quality, isHand, reflectionLength, fresnel);
 

shaders/world0/physics_ocean.fsh

@@ -0,0 +1,7 @@
+#version 120
+
+#define PHYSICSMOD_FRAGMENT
+#define PHYSICSMOD_OCEAN_SHADER
+#define OVERWORLD_SHADER
+
+#include "/dimensions/all_translucent.fsh"

shaders/world0/physics_ocean.vsh

@@ -0,0 +1,7 @@
+#version 120
+
+#define PHYSICSMOD_VERTEX
+#define PHYSICSMOD_OCEAN_SHADER
+#define OVERWORLD_SHADER
+
+#include "/dimensions/all_translucent.vsh"