70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
#ifndef NXS_PATCH_H
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#define NXS_PATCH_H
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#include <vcg/space/point3.h>
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#include <iostream>
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namespace nxs {
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struct Chunk {
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unsigned char p[4096];
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};
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class Patch {
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public:
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Patch(Chunk *s = NULL): start(s) {}
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unsigned short &VertSize() { return *(unsigned short *)start; }
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vcg::Point3f *VertBegin() {
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return (vcg::Point3f *)(((char *)start) + 2*sizeof(short)); }
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unsigned short &FaceSize() { return *(((unsigned short *)start) + 1); }
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unsigned short *FaceBegin() {
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return (unsigned short *)(((char *)start) + 2*sizeof(short) +
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VertSize() * sizeof(vcg::Point3f)); }
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vcg::Point3f &Vert(unsigned int v) {
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return VertBegin()[v];
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}
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unsigned short *Face(unsigned int f) {
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return FaceBegin() + f * 3;
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}
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unsigned int ChunkSize() {
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return ChunkSize(VertSize(), FaceSize());
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}
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unsigned int ByteSize() {
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return ByteSize(VertSize(), FaceSize());
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}
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static unsigned int ChunkSize(unsigned short nvert, unsigned short nface) {
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unsigned int size = ByteSize(nvert, nface);
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size = (size/sizeof(Chunk) + 1);
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return size;
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}
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static unsigned int ByteSize(unsigned short nvert, unsigned short nface) {
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unsigned int size = nvert * sizeof(vcg::Point3f);
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size += nface * 3 * sizeof(unsigned short);
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//this condition should really rarely happen but helps save space
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//during construction
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if(size < nface * 3 * sizeof(unsigned int))
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size = nface * 3 * sizeof(unsigned int);
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size += 2 * sizeof(unsigned short);
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return size;
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}
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// private:
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Chunk *start;
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};
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};
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#endif
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