attribute vec3 tri1;
attribute vec3 tri2;

uniform sampler2D t_pos;
uniform sampler2D t_oPos;
uniform sampler2D t_audio;
uniform sampler2D t_og;

uniform float audioDisplacement;
uniform vec3 lightPos;

varying vec2 vUv;
varying vec3 vVel;

varying vec3 vPos;
varying vec3 vMPos;

varying vec3 vLightDir;

//varying float vLife;
varying vec4 vAudio;

varying vec3 vNorm;

varying vec3 vCamPos;
varying vec3 vCamVec;
varying vec3 vMNorm;

varying vec2 vSEM;
varying float vFR;

$simplex

varying vec3 vReflection;

void main(){

  vUv = position.xy;
  //vec4 pos = texture2D( t_pos , vec2( vUv.x , (1. - (vUv.y + .125)) ) );
  vec4 pos = texture2D( t_pos , vUv );
  vec4 v1 = texture2D( t_pos , tri1.xy );
  vec4 v2 = texture2D( t_pos , tri2.xy );
  vec4 oPos = texture2D( t_oPos , vUv );
  vec4 ogPos = texture2D( t_og , vUv );

  vVel = pos.xyz - oPos.xyz;

  vec3 a1 = pos.xyz - v1.xyz;
  vec3 a2 = pos.xyz - v2.xyz;

  vNorm = normalize( cross( a1 , a2 ) );

  vec3 dif =  pos.xyz - ogPos.xyz;
  float displace = length( dif );

  float noise = snoise( pos.xyz * .01 );

 // vLife = length( pos.xyz - ogPos.xyz );
    
    //vNorm = normalize( a1 );

  //vNorm = normalize( vec3( tri1.x , tri1.y , 0. ) );

  vMPos = ( modelMatrix * vec4( pos.xyz , 1. ) ).xyz;
  vMNorm = ( modelMatrix * vec4( vNorm.xyz , 0. ) ).xyz;

 // vAudio = texture2D( t_audio , vec2( abs(vNorm.x) , 0. ) );


  
 
 // vColor = vec3( 1. );
  
  
  
 
  vLightDir = normalize( vMPos - lightPos );
  
 // vReflection =vNorm;//r;
  
  vec3 e = normalize( vec3( modelViewMatrix * vec4( pos.xyz , 1. ) ) );
  vec3 n = normalize( normalMatrix * vNorm );

  vec3 r = reflect( e, n );

  float m = 2. * sqrt( 
    pow( r.x, 2. ) + 
    pow( r.y, 2. ) + 
    pow( r.z + 1., 2. ) 
  );
  vSEM = r.xy / m + .5;

  float fr = 1. - abs(pow( dot( e , n ) , 4. )) ; 

  vReflection = r;
  vFR = fr;

  vAudio = texture2D( t_audio , vec2( vFR * vFR * vFR * vFR * vFR * vFR * vFR * vFR * vFR * vFR * vFR , 0. ) );

     pos.xyz += vNorm * length(vAudio )* audioDisplacement;//01;
  vPos = pos.xyz;
  //vLightDir = normalize( vMPos - vec3( 1000. , 0. , 0. ) );

  vCamVec = normalize( cameraPosition - vMPos);
  
  gl_Position = projectionMatrix * modelViewMatrix * vec4( pos.xyz , 1. );


}

