102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
#include "patch.h"
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using namespace nxs;
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Patch::Patch(Signature signature, Chunk *s,
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unsigned short nvert, unsigned short nface):
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start(s) {
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Init(signature, nvert, nface);
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}
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void Patch::Init(Signature signature,
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unsigned short nvert, unsigned short nface) {
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nv = nvert;
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nf = nface;
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if(signature & NXS_FACES)
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vstart = (float *)(((char *)start) + nf * sizeof(unsigned short) * 3);
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else if(signature & NXS_STRIP)
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vstart = (float *)(((char *)start) + nf * sizeof(unsigned short));
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else
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vstart = (float *)start;
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//align memory
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if(((int)vstart) & 0x2) vstart = (float *)(((char *)vstart) + 2);
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cstart = nv * sizeof(float) * 3;
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if(signature & NXS_COLORS)
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nstart = cstart + nv * sizeof(unsigned int);
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else
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nstart = cstart;
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if(signature & NXS_NORMALS_SHORT)
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tstart = nstart + nv * sizeof(short) * 4;
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else if(signature & NXS_NORMALS_FLOAT)
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tstart = nstart + nv * sizeof(float) * 3;
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else
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tstart = nstart;
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if(signature & NXS_TEXTURES_SHORT)
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dstart = tstart + nv * sizeof(short) * 2;
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else if(signature & NXS_TEXTURES_FLOAT)
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dstart = tstart + nv * sizeof(float) * 2;
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else
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dstart = tstart;
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}
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unsigned int Patch::ChunkSize(Signature signature,
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unsigned short nvert,
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unsigned short nface) {
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unsigned int size = ByteSize(signature, 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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unsigned int Patch::ByteSize(Signature signature,
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unsigned short nvert,
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unsigned short nface) {
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unsigned int size = 0;
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if(signature & NXS_STRIP)
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size += nface * sizeof(unsigned short);
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else if(signature & NXS_FACES)
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size += nface * 3 * sizeof(unsigned short);
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//memory alignment
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if(size & 0x2) size += 2;
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size += nvert * sizeof(vcg::Point3f);
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if(signature & NXS_COLORS)
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size += nvert * sizeof(unsigned int);
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if(signature & NXS_NORMALS_SHORT)
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size += nvert * 4 * sizeof(short);
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if(signature & NXS_NORMALS_FLOAT)
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size += nvert * 3 * sizeof(float);
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if(signature & NXS_TEXTURES_SHORT)
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size += nvert * 2 * sizeof(short);
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if(signature & NXS_TEXTURES_FLOAT)
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size += nvert * 2 * sizeof(float);
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if(signature & NXS_DATA8)
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size += nvert * sizeof(char);
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if(signature & NXS_DATA16)
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size += nvert * 2 * sizeof(char);
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if(signature & NXS_DATA32)
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size += nvert * 4 * sizeof(char);
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if(signature & NXS_DATA64)
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size += nvert * 8 * sizeof(char);
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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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return size;
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}
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