Changeset 7015

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Timestamp:
06/21/07 13:46:28
Author:
robert
Message:

Checked in missing files

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  • OpenSceneGraph-Data/trunk/shaders/lookup.frag

    r7004 r7015  
    77varying vec2 texcoord[9]; 
    88 
     9uniform float filterBias; 
     10 
     11#if 1 
     12 
    913void main() 
    1014{ 
    11     float value = 0.0; 
    12     value += texture2D(sourceTexture, texcoord[0].xy).x * filterMatrix[0][0]; 
    13     value += texture2D(sourceTexture, texcoord[1].xy).x * filterMatrix[0][1]; 
    14     value += texture2D(sourceTexture, texcoord[2].xy).x * filterMatrix[0][2]; 
    15     value += texture2D(sourceTexture, texcoord[3].xy).x * filterMatrix[1][0]; 
    16     value += texture2D(sourceTexture, texcoord[4].xy).x * filterMatrix[1][1]; 
    17     value += texture2D(sourceTexture, texcoord[5].xy).x * filterMatrix[1][2]; 
    18     value += texture2D(sourceTexture, texcoord[6].xy).x * filterMatrix[2][0]; 
    19     value += texture2D(sourceTexture, texcoord[7].xy).x * filterMatrix[2][1]; 
    20     value += texture2D(sourceTexture, texcoord[8].xy).x * filterMatrix[2][2]; 
     15    float value_0 = 0.0; 
     16    float original_value = texture2D(sourceTexture, texcoord[4].xy, 0.0).x; 
     17    float max_delta = 0.01; 
     18    float value = original_value; 
     19    float minBias = 0.5; 
     20    float maxBias = 2.5; 
     21    float deltaBias = 0.5; 
     22    for(float bias = minBias; bias<filterBias; bias += deltaBias) 
     23    { 
     24        float new_value = texture2D(sourceTexture, texcoord[4].xy, bias).x; 
     25        if (abs(new_value-original_value) > max_delta) break; 
     26        value = new_value;  
     27    } 
    2128     
    2229    vec4 overlay_color = texture1D(lookupTexture, (value-minValue)*inverseRange ); 
    …… 
    2431    gl_FragColor = overlay_color * gl_Color; 
    2532} 
     33 
     34#else 
     35 
     36void main() 
     37{ 
     38    float bias = filterBias; 
     39 
     40    float value = 0.0; 
     41    value += texture2D(sourceTexture, texcoord[0].xy, bias).x * filterMatrix[0][0]; 
     42    value += texture2D(sourceTexture, texcoord[1].xy, bias).x * filterMatrix[0][1]; 
     43    value += texture2D(sourceTexture, texcoord[2].xy, bias).x * filterMatrix[0][2]; 
     44    value += texture2D(sourceTexture, texcoord[3].xy, bias).x * filterMatrix[1][0]; 
     45    value += texture2D(sourceTexture, texcoord[4].xy, bias).x * filterMatrix[1][1]; 
     46    value += texture2D(sourceTexture, texcoord[5].xy, bias).x * filterMatrix[1][2]; 
     47    value += texture2D(sourceTexture, texcoord[6].xy, bias).x * filterMatrix[2][0]; 
     48    value += texture2D(sourceTexture, texcoord[7].xy, bias).x * filterMatrix[2][1]; 
     49    value += texture2D(sourceTexture, texcoord[8].xy, bias).x * filterMatrix[2][2]; 
     50     
     51    vec4 overlay_color = texture1D(lookupTexture, (value-minValue)*inverseRange ); 
     52 
     53    gl_FragColor = overlay_color * gl_Color; 
     54} 
     55#endif