// bmark-diderot.diderot // // This code is part of the Diderot Project (http://diderot-language.cs.uchicago.edu) // // COPYRIGHT (c) 2015 The University of Chicago // All rights reserved. // // compute Mandelbrot set image // // unu quantize -b 8 -i rgb.nrrd -o mandel.png // Global definitions int reso = 2000; int maxiter = 2000; vec2 center = [-1.2, -0.3]; // [0.0,0.0] for whole thing real fov = 0.15; // 2.0 for whole thing // Strand definition strand mandel (vec2 c) { vec2 z = [0.0, 0.0]; int iter = 0; output vec3 rgb = [0.0, 0.0, 0.0]; update { z = [z[0]^2 - z[1]^2, 2.0*z[0]*z[1]] + c; // z = z^2 + c iter += 1; if (z•z > 4.0) { // point has escaped; set color based on iteration real t = 11.0*real(iter)^0.2; rgb = [sin(t), sin(t + 2.0*π/3.0), sin(t - 2.0*π/3.0)]; rgb = ([1.7, 1.7, 1.7] + rgb)/2.7; stabilize; } else if (iter > maxiter) stabilize; } } // Strand initialization initially [ mandel([lerp(center[0]-fov, center[0]+fov, 1.0, real(crIdx), real(reso)), lerp(center[1]-fov, center[1]+fov, 1.0, real(ciIdx), real(reso))]) | ciIdx in 1..reso, crIdx in 1..reso ];
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The output has ended thus: er[1]-fov, center[1]+fov, 1.0, real(ciIdx), real(reso))]) | ciIdx in 1..reso, crIdx in 1..reso ];