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Next version of water shader, some clean up

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gral@who.net 2010-09-30 01:29:16 +02:00
parent 125ff9dd38
commit 3cdf9da27a
3 changed files with 203 additions and 88 deletions
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105
Effects/water.eff
View file

@ -2,11 +2,48 @@
<PropertyList>
<name>Effects/water</name>
<inherits-from>Effects/terrain-default</inherits-from>
<technique n="9">
<parameters>
<texture n="0">
<image>Textures/Water/water-reflection.png</image>
<filter>linear-mipmap-linear</filter>
<wrap-s>repeat</wrap-s>
<wrap-t>repeat</wrap-t>
<internal-format>normalized</internal-format>
</texture>
<texture n="1">
<image>Textures/Water/water-refraction.png</image>
<filter>linear-mipmap-linear</filter>
<wrap-s>repeat</wrap-s>
<wrap-t>repeat</wrap-t>
<internal-format>normalized</internal-format>
</texture>
<texture n="2">
<image>Textures/Water/water-normalmap.png</image>
<filter>linear-mipmap-linear</filter>
<wrap-s>repeat</wrap-s>
<wrap-t>repeat</wrap-t>
<internal-format>normalized</internal-format>
</texture>
<texture n="3">
<image>Textures/Water/water-dudv.png</image>
<filter>linear-mipmap-linear</filter>
<wrap-s>repeat</wrap-s>
<wrap-t>repeat</wrap-t>
<internal-format>normalized</internal-format>
</texture>
<saturation>
<use>/rendering/scene/saturation</use>
</saturation>
</parameters>
<technique n="8">
<predicate>
<and>
<property>/sim/rendering/water-shader</property>
<property>/sim/rendering/shader-effects</property>
<less-equal>
<value type="float">2.0</value>
<float-property>/sim/rendering/quality-level</float-property>
</less-equal>
<or>
<less-equal>
<value type="float">2.0</value>
@ -39,16 +76,74 @@
</render-bin>
<texture-unit>
<unit>0</unit>
<type>noise</type>
<image><use>texture[0]/image</use></image>
<filter><use>texture[0]/filter</use></filter>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
<internal-format>
<use>texture[0]/internal-format</use>
</internal-format>
</texture-unit>
<texture-unit>
<unit>1</unit>
<image><use>texture[1]/image</use></image>
<filter><use>texture[1]/filter</use></filter>
<wrap-s><use>texture[1]/wrap-s</use></wrap-s>
<wrap-t><use>texture[1]/wrap-t</use></wrap-t>
<internal-format>
<use>texture[1]/internal-format</use>
</internal-format>
</texture-unit>
<texture-unit>
<unit>2</unit>
<image><use>texture[2]/image</use></image>
<filter><use>texture[2]/filter</use></filter>
<wrap-s><use>texture[2]/wrap-s</use></wrap-s>
<wrap-t><use>texture[2]/wrap-t</use></wrap-t>
<internal-format>
<use>texture[2]/internal-format</use>
</internal-format>
</texture-unit>
<texture-unit>
<unit>3</unit>
<image><use>texture[3]/image</use></image>
<filter><use>texture[3]/filter</use></filter>
<wrap-s><use>texture[3]/wrap-s</use></wrap-s>
<wrap-t><use>texture[3]/wrap-t</use></wrap-t>
<internal-format>
<use>texture[3]/internal-format</use>
</internal-format>
</texture-unit>
<program>
<vertex-shader>Shaders/water.vert</vertex-shader>
<fragment-shader>Shaders/water.frag</fragment-shader>
</program>
<uniform>
<name>texture</name>
<type>sampler-3d</type>
<value type="int">0</value></uniform>
<name>water_reflection</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>water_refraction</name>
<type>sampler-2d</type>
<value type="int">1</value>
</uniform>
<uniform>
<name>water_normalmap</name>
<type>sampler-2d</type>
<value type="int">2</value>
</uniform>
<uniform>
<name>water_dudvmap</name>
<type>sampler-2d</type>
<value type="int">3</value>
</uniform>
<uniform>
<name>saturation</name>
<type>float</type>
<value>0.4</value>
<!--<value><use>saturation</use></value>-->
</uniform>
</pass>
</technique>
</PropertyList>

133
Shaders/water.frag
View file

@ -1,86 +1,81 @@
#version 120
uniform sampler2D water_normalmap;
uniform sampler2D water_reflection;
uniform sampler2D water_dudvmap;
uniform float saturation;
varying vec4 rawpos;
varying vec4 waterTex1; //moving texcoords
varying vec4 waterTex2; //moving texcoords
varying vec4 waterTex4; //viewts
varying vec4 ecPosition;
varying vec3 VNormal;
varying vec3 Normal;
varying vec3 lightVec;
uniform sampler3D NoiseTex;
uniform float osg_SimulationTime;
//const float scale = 1.0;
varying vec3 viewerdir;
varying vec3 lightdir;
varying vec3 normal;
void main(void)
{
vec4 noisevecS = texture3D(NoiseTex, (rawpos.xyz)*0.0126);
vec4 nvLS = texture3D(NoiseTex, (rawpos.xyz)*-0.0003323417);
const vec4 sca = vec4(0.005, 0.005, 0.005, 0.005);
const vec4 sca2 = vec4(0.02, 0.02, 0.02, 0.02);
const vec4 tscale = vec4(0.25, 0.25, 0.25, 0.25);
vec4 noisevec = texture3D(NoiseTex, (rawpos.xyz)*0.00423+vec3(0.0,0.0,osg_SimulationTime*0.035217));
vec4 nvL = texture3D(NoiseTex, (rawpos.xyz)*0.001223417+(0.0,0.0,osg_SimulationTime*-0.0212));
// compute direction to viewer
vec3 E = normalize(viewerdir);
// compute direction to light source
vec3 L = normalize(lightdir);
// half vector
vec3 H = normalize(L + E);
const float water_shininess = 240.0;
vec4 viewt = normalize(waterTex4);
vec4 disdis = texture2D(water_dudvmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0;
vec4 dist = texture2D(water_dudvmap, vec2(waterTex1 + disdis*sca2)) * 2.0 - 1.0;
//vec4 fdist = dist;
vec4 fdist = normalize(dist);
fdist *= sca;
//normalmap
vec4 nmap0 = texture2D(water_normalmap, vec2(waterTex1+ disdis*sca2)) * 2.0 - 1.0;
vec4 nmap2 = texture2D(water_normalmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0;
vec4 vNorm = normalize(nmap0 + nmap2);
//load reflection
vec4 tmp = vec4(lightdir, 0.0);
vec4 refTex = texture2D(water_reflection, vec2(tmp));
vec4 refl = normalize(refTex);
vec3 N0 = vec3(texture2D(water_normalmap, vec2(waterTex1+ disdis*sca2)) * 2.0 - 1.0);
vec3 N1 = vec3(texture2D(water_normalmap, vec2(waterTex2 * tscale)) * 2.0 - 1.0);
vec3 N = normalize(normal+N0+N1);
vec3 specular_color = vec3(gl_LightSource[0].diffuse)
* pow(max(0.0, dot(N, H)), water_shininess) * 6.0;
vec4 specular = vec4(specular_color,0.5);
//calculate fresnel
vec4 invfres = vec4( dot(vNorm, viewt) );
vec4 fres = vec4(1.0) + invfres;
refl *= fres;
specular = specular * saturation;
vec4 finalColor = refl + specular;
float fogFactor;
if (gl_Fog.density == 1.0)
{
fogFactor=1.0;
}
else
{
float fogCoord = ecPosition.z;
const float LOG2 = 1.442695;
fogFactor = exp2(-gl_Fog.density * gl_Fog.density * fogCoord * fogCoord * LOG2);
fogFactor = clamp(fogFactor, 0.0, 1.0);
}
float a=1.0;
float n=0.00;
n += nvLS[0]*a;
a/=2.0;
n += nvLS[1]*a;
a/=2.0;
n += nvLS[2]*a;
a/=2.0;
n += nvLS[3]*a;
vec4 ambient_light = gl_LightSource[0].diffuse;
a=4.0;
float na=n;
na += nvL[0]*1.1;
a*=1.2;
na += nvL[1]*a;
a*=1.2;
na += nvL[2]*a;
a*=1.2;
na += nvL[3]*a;
a=2.0;
na += noisevec[0]*a*0.2;
a*=1.2;
na += noisevec[1]*a;
a*=1.2;
na += noisevec[2]*a;
a*=1.2;
na += noisevec[3]*a;
finalColor *= ambient_light;
vec4 c1;
c1 = asin(vec4(smoothstep(0.0, 2.2, n), smoothstep(-0.1, 2.10, n), smoothstep(-0.2, 2.0, n), 1.0));
if(gl_Fog.density == 1.0)
fogFactor=1.0;
vec3 Eye = normalize(-ecPosition.xyz);
vec3 Reflected = normalize(reflect(-normalize(lightVec), normalize(VNormal+vec3(0.0,0.0,na*0.10-0.24))));
vec3 bump = normalize(VNormal+vec3(0.0, 0.0, na)-0.9);
vec3 bumped = max(normalize(refract(lightVec, normalize(bump), 0.16)), 0.0);
vec4 ambientColor = gl_LightSource[0].ambient;
vec4 light = ambientColor;
c1 *= light;
float bumpFact = (bumped.r+bumped.g+bumped.b);
float ReflectedEye = max(dot(Reflected, Eye), 0.0);
float eyeFact = pow(ReflectedEye, 20.0);
c1 += 0.3 * gl_LightSource[0].diffuse * (1.0-eyeFact) * bumpFact*bumpFact;
c1 += 0.4 * gl_LightSource[0].diffuse * eyeFact * 3*bumpFact;
eyeFact = pow(eyeFact, 20.0);
c1 += gl_LightSource[0].specular * eyeFact * 4*bumpFact;
vec4 finalColor = c1;
gl_FragColor = mix(gl_Fog.color,finalColor, fogFactor);
}

41
Shaders/water.vert
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@ -1,15 +1,40 @@
varying vec4 rawpos;
varying vec4 waterTex1;
varying vec4 waterTex2;
varying vec4 waterTex4;
varying vec4 ecPosition;
varying vec3 VNormal;
varying vec3 Normal;
varying vec3 lightVec;
uniform float osg_SimulationTime;
varying vec3 viewerdir;
varying vec3 lightdir;
varying vec3 normal;
void main(void)
{
rawpos = gl_Vertex;
vec3 N = normalize(gl_Normal);
normal = N;
ecPosition = gl_ModelViewMatrix * gl_Vertex;
VNormal = normalize(gl_NormalMatrix * gl_Normal);
Normal = normalize(gl_Normal);
lightVec = normalize(gl_LightSource[0].position.xyz/* - ecPosition*/);
viewerdir = vec3(gl_ModelViewMatrixInverse[3]) - vec3(gl_Vertex);
lightdir = normalize(vec3(gl_ModelViewMatrixInverse * gl_LightSource[0].position));
vec4 temp;
vec4 tangent = vec4(1.0, 0.0, 0.0, 0.0);
vec4 norm = vec4(0.0, 1.0, 0.0, 0.0);
vec4 binormal = vec4(0.0, 0.0, 1.0, 0.0);
temp = ecPosition;
waterTex4.x = dot(temp, tangent);
waterTex4.y = dot(temp, binormal);
waterTex4.z = dot(temp, norm);
waterTex4.w = 0.0;
vec4 t1 = vec4(0.0, osg_SimulationTime*0.005217, 0.0,0.0);
vec4 t2 = vec4(0.0, osg_SimulationTime*-0.0012, 0.0,0.0);
waterTex1 = gl_MultiTexCoord0 + t1;
waterTex2 = gl_MultiTexCoord0 + t2;
gl_Position = ftransform();
}