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Revision 369ee56a

Added by Leszek Koltunski almost 8 years ago

fix in vertex shader

View differences:

src/main/res/raw/main_vertex_shader.glsl
83 83 
float degree_bitmap(in vec2 S, in vec2 PS)
84 84 
  {
85 85 
  vec2 A = sign(PS)*u_objD.xy + S;
86 
  float B = sign(A.x*A.y);
87 86 

  		




  88
  
  
    
  return B*B*(1.0 + min(-PS.x/A.x,-PS.y/A.y));


  		




  
  87
  
    
  vec2 signA = sign(A);                           //


  		




  
  88
  
    
  vec2 signA_SQ = signA*signA;                    // div = PS/A if A!=0, 0 otherwise.


  		




  
  89
  
    
  vec2 div = signA_SQ*PS/(A+signA_SQ-vec2(1,1));  //


  		




  
  90
  
    

  		




  
  91
  
    
  return 1.0-max(div.x,div.y);


  		




  89
  92
  
    
  }


  		




  90
  93
  
    

  		




  91
  94
  
    
//////////////////////////////////////////////////////////////////////////////////////////////


  		




  ......




  111
  114
  
    
  vec2 PO  = PS + region.xy;


  		




  112
  115
  
    
  float D = region.z*region.z-dot(PO,PO);      // D = |OX|^2 - |PO|^2


  		




  113
  116
  
    
  vec2 A = sign(PS)*u_objD.xy + S;


  		




  114
  
  
    
  float B = sign(A.x*A.y);


  		




  115
  
  
    
  float E = B*B*(1.0 + min(-PS.x/A.x,-PS.y/A.y));


  		




  
  117
  
    
  vec2 signA = sign(A);


  		




  
  118
  
    
  vec2 signA_SQ = signA*signA;


  		




  
  119
  
    
  vec2 div = signA_SQ*PS/(A+signA_SQ-vec2(1,1));


  		




  
  120
  
    
  float E = 1.0-max(div.x,div.y);


  		




  
  121
  
    

  		




  116
  122
  
    
  float ps_sq = dot(PS,PS);


  		




  117
  123
  
    
  float one_over_ps_sq = 1.0/(ps_sq+1.0-sign(ps_sq));  // return 1.0 if ps_sq = 0.0


  		




  118
  124
  
    
  float DOT  = dot(PS,PO)*one_over_ps_sq;


  		




  ......




  279
  285
  
    
  v.z += uz*d*d*(3.0*d*d -8.0*d +6.0);                                                          // thick bubble


  		




  280
  286
  
    
  float b = -(12.0*uz*d*(1.0-d)*(1.0-d)*(1.0-d)) / (dt + (1.0-d)*dot(w,ps) + (sign(dt)-1.0) );  // the last part - (sign-1) is to avoid b being a NaN when ps=(0,0)


  		




  281
  287
  
    
                


  		




  282
  
  
    
  v.xy += d*w;  


  		




  
  288
  
    
  v.xy += d*w;


  		




  283
  289
  
    
  n.xy += b*ps;


  		




  284
  290
  
    
  }


  		




  285
  291
  
    
 


  		












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