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Shadow and Sun Light Analysis

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Hi all,

Do you have some ideas how to make Shadow and Sun analysis in H17.5? I would like to make the analytic tool for my procedural city, similar to this: 6121d3ee3961c11877aecbd275eb066a.jpg

I think it would be "sun" vector promoted to objects attributes as color. Maybe some use of new measure node?

Thank you for any advices.


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Hi, maybe this approach might work:

int count = npoints(1);

for (int i = 0; i < count; i++)

    vector camP = point(1, "P", i);
    vector dir = normalize(camP - @P);
    float bias = 0.01;
    vector hit_ps[];
    int hits = intersect_all(0, @P, dir * 100, hit_ps, {}, {});
    if (hits && distance(@P, hit_ps[-1]) > bias)
    // or just check number of intersections:
    // if (  length(hits) >1   )
        @Cd *= 0.6;





Edited by ikoon
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