CandleFlame - 图1

    1. // OSL Shader by Tomás Atria based on http://glslsandbox.com/ examples
    2. // Modified by Saul Espinosa 7/15/2021 for Redshift 3d
    4.     float fract(float x)
    5. {
    6.     return (x - floor(x));
    7. }
    8.     shader candle_flame
    9. [[  string help = "Candle Flame for 2D Cards",
    10.     string label = "Candle Flame" ]]
    11. (
    12.     point Po = point(u,v,0),
    14.     float Time = 1.0
    15.     [[    string label = "Time", float min = 0.0, float max = 1000.0]],
    17.     int   aces = 0
    18.     [[ string widget = "checkBox",
    19.     string label = "ACES",
    20.     int connectable = 0 ]],
    22.     output vector outColor = 0,
    23. )
    25. {
    26.     point pos = Po;
    27.     //NEW
    28.     pos = ( pos ) * 7.7-point(4.,5.,0.);
    29.     pos[1] = (pos[1]/.88);
    30.     if(pos[1]>-2.*4.2)
    31.     {
    32.     for(float baud = 1.; baud < 9.; baud += 1.)
    33.         {
    34.          pos[1] += 0.2*sin(4.20*Time/(1.+baud))/(1.+baud);
    35.          pos[0] += 0.1*cos(pos[1]/4.20+2.40*Time/(1.+baud))/(1.+baud);
    36.         //NEW
    37.         //pos[1] += 3.2*sin(16.*4.555*Time/(1.+baud))/(1.+baud*32);
    38.         //pos[0] += 0.03*cos(2.*Time/(1.+0.01*baud*cos(baud*baud)+pos[0]/4e3))/(1.+baud);
    39.         }
    40.     //pos[1] += 0.04*fract(sin(Time*60.));
    41.     //NEW
    42.     pos[0] += 0.04*mod((sin(Time*60.)),1.0);
    43.     }
    44.     vector col = vector(0.,0.,0.);
    45.     float p =.004;
    46.     float y = -pow(abs(pos[0]), 4.2)/p;
    47.     float dir = abs(pos[1] - y)*sin(.3);
    48.    //float dir = abs(pos[1] - y)*(0.01*sin(Time)+0.07);
    49.     if(dir < 0.7)
    50. {
    51.     //color.rg += smoothstep(0.,1.,.75-dir);   
    52.     //color.g /=2.4;
    53.     col[0] += smoothstep(0.0,1.,.75-dir);
    54.     col[1] += smoothstep(0.0,1.,.75-dir);
    55.     col[1] /=2.4;                          
    56. }
    57.     // ACES sRGB Transform
    58.     matrix aces_tm = matrix(
    59.         0.6131, 0.0701, 0.0206, 0,
    60.         0.3395, 0.9164, 0.1096, 0,
    61.         0.0474, 0.0135, 0.8698, 0,
    62.         0, 0, 0, 1);
    64.     col *= (0.2 + abs(pos[1]/4.2 + 4.2)/4.2);  
    65.     col += pow(col[0], 1.1);                 
    66.     col *= cos(-0.5+pos[1]*0.4);               
    67.     pos[1] += 1.5;
    68.     vector dolor = vector(0.,0.,0.0);
    69.     y = -pow(abs(pos[0]), 4.2)/(4.2*p)*4.2;   
    70.     dir = abs(pos[1] - y)*sin(1.1);           
    71.     if(dir < 0.7)
    72.     {
    73.         //dolor.bg += smoothstep(0., 1., .75-dir);
    74.         //dolor.g /=2.4;
    75.         dolor[2] += smoothstep(.0,1.,.75-dir);
    76.         dolor[1] += smoothstep(.0,1.,.75-dir);
    77.         dolor[1] /= 2.4;
    78.     }
    79.     dolor *= (0.2 + abs((pos[1]/4.2+4.2))/4.2);
    80.     dolor += pow(col[2],1.1);                 
    81.     dolor *= cos(-0.6+pos[1]*0.4);
    82.     dolor -= pow(length(dolor)/16., 0.5);
    83.     //col = (col+dolor)/2.;
    84.     //NEW
    85.     col = (col*0.6+dolor)/1.5;
    87.     vector Out = vector(col);
    89.     float r = Out[0], g = Out[1], b = Out[2];
    91.     // ACES Output
    92.     if (aces == 0)
    93.     outColor = Out;
    94.     else
    95.     {
    96.     outColor = transform(aces_tm, vector(r,g,b));
    97.     }
    98. }