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Revision 6ebdbbf1

Added by Leszek Koltunski about 8 years ago

DEFORM: add support for Regions

View differences:

src/main/java/org/distorted/library/DistortedObject.java
746 746 
    return mV.add(EffectNames.DISTORT, vector, center, null);
747 747 
    }
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///////////////////////////////////////////////////////////////////////////////////////////////////


  		




  
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/**


  		




  
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 * Deform the shape of the whole Object with a (possibly changing in time) vector of force applied to


  		




  
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 * a (possibly changing in time) point on the Object.


  		




  
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 *


  		




  
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 * @param vector Vector of force that deforms the shape of the whole Object.


  		




  
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 * @param center 3-dimensional Data that, at any given time, returns the Center of the Effect.


  		




  
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 * @param region Region that masks the Effect.


  		




  
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 * @return       ID of the effect added, or -1 if we failed to add one.


  		




  
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 */


  		




  
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  public long deform(Data3D vector, Data3D center, Data4D region)


  		




  
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    {


  		




  
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    return mV.add(EffectNames.DEFORM, vector, center, region);


  		




  
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    }


  		




  
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///////////////////////////////////////////////////////////////////////////////////////////////////


  		




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/**


  		




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 * Deform the shape of the whole Object with a (possibly changing in time) vector of force applied to


  		












  

    
      src/main/java/org/distorted/library/EffectNames.java
    
  





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   * <p>


  		




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   * Unity: (forceX,forceY) = (0,0)


  		




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   */


  		




  114
  
  
    
  DEFORM           ( EffectTypes.VERTEX  ,   new float[] {0.0f,0.0f}      , 3, false, true ),


  		




  
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  DEFORM           ( EffectTypes.VERTEX  ,   new float[] {0.0f,0.0f}      , 3, true, true ),


  		




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 /**


  		




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   * Pull (or push away) all points around a center point to (from) it.


  		




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   * <p>


  		












  

    
      src/main/res/raw/main_vertex_shader.glsl
    
  





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//


  		




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// Constants:


  		




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// a) A : valid values: (0,infinity). 'Bendiness' if the surface - the higher A is, the more the surface


  		




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//        bends. A<=0 destroys the system,


  		




  
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//        bends. A<=0 destroys the system.


  		




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// b) B : valid values: <-1,1>. The amount side edges get 'sucked' inwards when we pull the middle of the


  		




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//        top edge up. B=0 --> not at all, B=1: a looot. B=-0.5: the edges will actually be pushed outwards


  		




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//        quite a bit. One can also set it to <-1 or >1, but it will look a bit ridiculous.


  		




  ......




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void deform(in int effect, inout vec4 v)


  		




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  {


  		




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  const vec2 one = vec2(1.0,1.0);


  		




  
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  const vec2 ONE = vec2(1.0,1.0);


  		




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  const float A = 0.5;


  		




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  const float B = 0.2;


  		




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  const float C = 5.0;


  		




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  vec2 center = vUniforms[effect+1].yz;


  		




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  vec2 force  = vUniforms[effect].xy;


  		




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  vec2 dist   = center-v.xy;


  		




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  vec2 aDist  = abs(dist.xy);


  		




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  vec2 maxdist= u_objD.xy + abs(center);


  		




  
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  vec2 ps     = center-v.xy;


  		




  
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  vec2 aPS    = abs(ps);


  		




  
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  vec2 maxps  = u_objD.xy + abs(center);


  		




  
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  vec2 force  = vUniforms[effect].xy * degree_region(vUniforms[effect+2],ps);


  		




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  vec2 aForce = abs(force);


  		




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  vec2 Aw = A*maxdist;


  		




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  vec2 quot = dist / maxdist;


  		




  
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  vec2 Aw = A*maxps;


  		




  
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  vec2 quot = ps / maxps;


  		




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  quot = quot*quot;                          // ( (x/W)^2 , (y/H)^2 ) where x,y are distances from V to center


  		




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  float denomV = 1.0 / (aForce.y + Aw.x);


  		




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  float denomH = 1.0 / (aForce.x + Aw.y);


  		




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  vec2 vertCorr= one - aDist / ( aForce+C*aDist + (one-sign(aForce)) );


  		




  
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  vec2 vertCorr= ONE - aPS / ( aForce+C*aPS + (ONE-sign(aForce)) );


  		




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  float mvXvert = -B * dist.x * aForce.y * (1.0-quot.y) * denomV;    // impact the vertical   component of the force vector has on horizontal movement


  		




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  float mvYhorz = -B * dist.y * aForce.x * (1.0-quot.x) * denomH;    // impact the horizontal component of the force vector has on vertical   movement


  		




  
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  float mvXvert = -B * ps.x * aForce.y * (1.0-quot.y) * denomV;      // impact the vertical   component of the force vector has on horizontal movement


  		




  
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  float mvYhorz = -B * ps.y * aForce.x * (1.0-quot.x) * denomH;      // impact the horizontal component of the force vector has on vertical   movement


  		




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  float mvYvert =  force.y * (1.0-quot.x*Aw.x*denomV) * vertCorr.y;  // impact the vertical   component of the force vector has on vertical   movement


  		




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  float mvXhorz = -force.x * (1.0-quot.y*Aw.y*denomH) * vertCorr.x;  // impact the horizontal component of the force vector has on horizontal movement


  		




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