lines.h

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#pragma once
 
#include <scimesh/types.h>
 
#include <algorithm>
#include <vector>
 
namespace scimesh {
 
struct LineLayer {
    std::vector<Vec3> from;
 
    std::vector<Vec3> to;
 
    std::vector<Color> colors;
 
    float width = 1.0f;
 
    bool depth_test = true;
 
    bool lit = false;
 
    bool affects_bounds = true;
 
    bool compute_bounding_box(Vec3 &min_bound, Vec3 &max_bound) const {
        bool first = true;
        auto add = [&](const Vec3 &p) {
            if (first) {
                min_bound = p;
                max_bound = p;
                first = false;
            } else {
                min_bound = glm::min(min_bound, p);
                max_bound = glm::max(max_bound, p);
            }
        };
        for (const Vec3 &p : from)
            add(p);
        for (const Vec3 &p : to)
            add(p);
        return !first;
    }
 
    size_t size() const { return std::min(from.size(), to.size()); }
 
    bool empty() const { return size() == 0; }
 
    Color color_or(size_t i, const Color &fallback) const {
        if (colors.empty()) {
            return fallback;
        }
        return (i < colors.size()) ? colors[i] : colors.back();
    }
};
 
struct LineNodeRef {
    const LineLayer *layer = nullptr;  
    Mat4 transform = Mat4(1.0f);       
    std::string name;                  
};
 
} // namespace scimesh