47 lines
810 B
C
47 lines
810 B
C
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#ifndef VCG_ZCURVE_H
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#include <vcg/space/box3.h>
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namespace vcg {
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class ZCurve: public Box3f {
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public:
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unsigned int side;
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ZCurve(): side(1024) {}
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void SetSide(int s) { assert(s <= (1<<10)); side = s; }
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unsigned int Pos(const Point3f &p) const {
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assert(!IsNull());
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unsigned int position = 0;
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float x = (p[0] - min[0])/(max[0] - min[0]);
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float y = (p[1] - min[1])/(max[1] - min[1]);
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float z = (p[2] - min[2])/(max[2] - min[2]);
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unsigned int s = side;
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while(s > 1) {
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position *= 8;
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x *= 2;
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y *= 2;
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z *= 2;
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int dx = (int)floor(x);
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int dy = (int)floor(y);
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int dz = (int)floor(z);
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position += dx + 2 * dy + 4 * dz;
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x -= dx;
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y -= dy;
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z -= dz;
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s /= 2;
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}
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return position;
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}
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};
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}
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#endif
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