using std::max;
using std::vector;
struct Vertex
{
Vec3f position;
Vec3f normal;
Vec2f texcoord;
};
istream& operator >> (istream& is, Vertex& v)
{
return is >> v.position.x >>
v.position.y >>
v.position.z >>
v.normal.x >>
v.normal.y >>
v.normal.z >>
v.texcoord.x >> // u
v.texcoord.y; // v
}
bool load(const ByteStream& bytes)
{
istringstream iss((char*)(&bytes[0]));
int type;
unsigned int primitiveCount = 0;
unsigned int vertCount = 0;
Spheref bounding;
iss >> type >> primitiveCount >> bounding.center.x >> bounding.center.y >> bounding.center.z >> bounding.radius;
if(!iss.bad() &&
primitiveCount > 0 &&
bounding.radius > 0)
{
// Determine the vert count based on the primitive type, and primitive count
switch(type)
{
case Model::TriangleList: vertCount = primitiveCount * 3; break;
case Model::TriangleStrip: vertCount = primitiveCount + 1; break;
case Model::TriangleFan: vertCount = primitiveCount + 2; break;
default: return false;
}
if(vertCount >= 65536) // If the vert count is >= 2^16 (max size of a unsigned short), that'll screw stuff up
{
return false;
}
vector<short> indexData(vertCount);
// Reads in all of the indicies from the iss
for(unsigned int x = 0; x < vertCount; ++x)
{
iss >> indexData[x];
}
vector<Vertex> verts(vertCount);
// Reads in all of the vertecies from the iss
for(unsigned int x = 0; x < vertCount; ++x)
{
iss >> verts[x];
}
#undef far
#undef near
float right = verts[0].x;
float left = verts[0].x;
float high = verts[0].y;
float low = verts[0].y;
float far = verts[0].z;
float near = verts[0].z;
// find the extreme points
for(unsigned int i = 1; i < vertCount; ++i)
{
if (verts[i].x > right.x) right = verts[i].x;
else if(verts[i].x < left.x) left = verts[i].x;
if (verts[i].y > high.y) high = verts[i].y;
else if(verts[i].y < low.y) low = verts[i].y;
if (verts[i].z > far.z) far = verts[i].z;
else if(verts[i].z < close.z) close = verts[i].z;
}
Vec3f midpoint((right-left)/2.0f,
(high -low) /2.0f,
(far -near)/2.0f);
// normalize the points to a 0,0,0 center
for(unsigned int i = 0; i < vertCount; ++i)
{
verts[i] -= midpoint;
}
float radius = max(max((right-left), (high-low)), (far-near));
}
}
