Example #1
0
/**	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;
}