Blobby Surface Shader 0.01)) { fieldInc = 1.0 / radius; field += fieldInc; eyeNorm3 += (fieldInc * fieldInc) * norm; } } // // If we are within our tolerances, then we quit // if(field > (RadiusOfInfluence - Threshold)) { if(field < (RadiusOfInfluence + Threshold)) { found = true; } } // // Outside tolerances, so add an increment and try again // if(found == false) { if(field < RadiusOfInfluence) // radius is too big { if(tooBig == false) incVec /= 2.0; // only do this when we've gone past the isosurface tooBig = true; vert -= incVec; } else { if(tooBig == true) incVec /= 2.0; // only do this when we've gone past the isosurface tooBig = false; vert += incVec; } } // // If we've jumped too many times - bail out // if(count == BailOut && found != true) { // too many hops found = true; } } // // Calc the values as required by the fragment shader // eyeNorm3 = normalize(gl_NormalMatrix * eyeNorm3); eyeCoord = gl_ModelViewMatrix * vec4(vert, 1.0); eyeCoord3 = eyeCoord.xyz / eyeCoord.w; gl_TexCoord[0] = vec4(SphereMap(eyeCoord3, eyeNorm3), 0.0, 1.0); gl_Position = gl_ProjectionMatrix * eyeCoord; } ]]>