/** Overlay constructor
*
* Operation:
* -# Create a surface for the overlay's texture
* -# Initialise the mesh base class to hold 4 vertices
* -# Initialise the surface to hold 6 indicies (3 for each triangle, 2 triangles for one rectangle)
* -# Assign the default vertex data for the rectangle
* -# Assign the default normal data for the rectangle
* -# Assign the triangle indices
* -# Set the surfaces vertex/normal/index data
* -# Generate a white material and update the surface with it
*/
Overlay::Overlay()
{
IVertexBuffer *v = AddVertexBuffer();
Initialise(4);
v->Initialise(GetNumVertex(),6,3,2);
int *index = v->GetIndex();
// Assign all the m_position data
m_position[0].x = 0; m_position[0].y = 0; m_position[0].z = 0;
m_position[1].x = 0; m_position[1].y = 1; m_position[1].z = 0;
m_position[2].x = 1; m_position[2].y = 1; m_position[2].z = 0;
m_position[3].x = 1; m_position[3].y = 0; m_position[3].z = 0;
// Assign all the m_normal data
m_normal[0].x = 0; m_normal[0].y = 0; m_normal[0].z = 1;
m_normal[1].x = 0; m_normal[1].y = 0; m_normal[1].z = 1;
m_normal[2].x = 0; m_normal[2].y = 0; m_normal[2].z = 1;
m_normal[3].x = 0; m_normal[3].y = 0; m_normal[3].z = 1;
// Assign all the polygon indices
index[0] = 0; index[1] = 1; index[2] = 2;
index[3] = 0; index[4] = 3; index[5] = 2;
v->SetPosition((float *)m_position);
v->SetNormal((float *)m_normal);
v->SetIndex(index);
Material *m = v->GetMaterial();
m->colour.r = 1;
m->colour.g = 1;
m->colour.b = 1;
m->colour.a = 1;
v->SetMaterial(m);
}
YSRESULT YsShell::SaveMsh(int &nIgnored,const char fn[]) const
{
FILE *fp;
YsShellVertexHandle vtHd;
YsShellPolygonHandle plHd;
Encache();
nIgnored=0;
fp=fopen(fn,"w");
if(fp!=NULL)
{
int id,nofel2;
fprintf(fp,"nofnod %d\n",GetNumVertex());
id=1;
vtHd=NULL;
while((vtHd=FindNextVertex(vtHd))!=NULL)
{
YsVec3 pos;
GetVertexPosition(pos,vtHd);
fprintf(fp,"nod %d %lf %lf %lf\n",id,pos.x(),pos.y(),pos.z());
id++;
}
nofel2=0;
plHd=NULL;
while((plHd=FindNextPolygon(plHd))!=NULL)
{
if(GetNumVertexOfPolygon(plHd)==3 || GetNumVertexOfPolygon(plHd)==4)
{
nofel2++;
}
else
{
nIgnored++;
}
}
fprintf(fp,"nofel2 %d\n",nofel2);
id=1;
plHd=NULL;
while((plHd=FindNextPolygon(plHd))!=NULL)
{
int i,n;
const YsShellVertexHandle *plVtHd;
n=GetNumVertexOfPolygon(plHd);
plVtHd=GetVertexListOfPolygon(plHd);
if(n==3 || n==4)
{
fprintf(fp,"el2 %d %d",id,n);
for(i=0; i<n; i++)
{
fprintf(fp," %d",GetVertexIdFromHandle(plVtHd[i])+1);
}
fprintf(fp,"\n");
id++;
}
}
fclose(fp);
return YSOK;
}
return YSERR;
}
