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#include "md2.h"
#include <k3dsdk/log.h>
#include <stdexcept>
namespace module
{
namespace md2
{
namespace io
{
md2Model::md2Model(const char *f) :
triangles(0),
frames(0),
texcoords(0),
skins(0)
{
FILE *md2file = fopen(f, "rb");
// Check if the file was loaded correctly
if(md2file == NULL)
throw std::runtime_error("Error opening file.");
// Extract Header and check if it is a valid md2 file
fread(&header, 1, sizeof(md2Header), md2file);
if((header.id != 844121161) || (header.version != 8))
throw std::runtime_error("Not an MD2 model.");
// Extract Skin names
skins = new md2Skins[header.numSkins];
for(k3d::int32_t i=0; i<header.numSkins;i++)
fread(skins[i],1,sizeof(md2Skins), md2file);
// Extract Texture coordinates
texcoords = new md2TexCoords[header.numTexCoords];
md2TmpTexCoords tmpcoords;
fseek(md2file, header.offsetTexCoords, SEEK_SET);
for(k3d::int32_t i=0; i<header.numTexCoords;i++)
{
//Converting values to [0,1]
fread(&tmpcoords, sizeof(md2TmpTexCoords), 1, md2file);
texcoords[i].val[0] = (float)tmpcoords.x/(float)header.skinWidth;
texcoords[i].val[1] = 1-(float)tmpcoords.y/(float)header.skinHeight;
//printf("%f \t %f \n", texcoords[i].val[0], texcoords[i].val[1]);
}
// Extract triangle indices
triangles = new md2Triangles[header.numTriangles];
fseek(md2file, header.offsetTriangles, SEEK_SET);
for(k3d::int32_t i=0; i<header.numTriangles; i++)
fread(&triangles[i], 1, sizeof(md2Triangles), md2file);
// Extract frames and vertices
byte buffer[2048*4+128];
float a;
frames = new md2Frames[header.numFrames];
for(k3d::int32_t i=0; i<header.numFrames; i++)
{
md2SingleFrame *frame = (md2SingleFrame *) buffer;
frames[i].vertex = new md2Vertex[header.numVertex];
fseek(md2file, header.offsetFrames+header.frameSize*i, SEEK_SET);
fread(&a, 1, sizeof(float), md2file);
frame->scale[0] = a;
fread(&a, 1, sizeof(float), md2file);
frame->scale[1] = a;
fread(&a, 1, sizeof(float), md2file);
frame->scale[2] = a;
fread(&a, 1, sizeof(float), md2file);
frame->translate[0] = a;
fread(&a, 1, sizeof(float), md2file);
frame->translate[1] = a;
fread(&a, 1, sizeof(float), md2file);
frame->translate[2] = a;
fread(frame->name, sizeof(char), 16, md2file);
strcpy(frames[i].name, frame->name);
//printf("%s\n", frame->name);
fread(frame->vertex, sizeof(md2TriangleVertex), header.numVertex, md2file);
for(k3d::int32_t j=0; j<header.numVertex; j++)
{
frames[i].vertex[j].val[0] = frame->vertex[j].val[0]*frame->scale[0] + frame->translate[0];
frames[i].vertex[j].val[2] = frame->vertex[j].val[1]*frame->scale[1] + frame->translate[1];
frames[i].vertex[j].val[1] = frame->vertex[j].val[2]*frame->scale[2] + frame->translate[2];
}
}
fclose(md2file);
}
md2Model::~md2Model()
{
delete[] frames;
delete[] triangles;
delete[] texcoords;
delete[] skins;
}
} // namespace io
} // namespace md2
} // namespace module
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