int Object::createPlane( Material* mat , float w , float h , float* color , float xTile , float yTile ,
Vector3 const& normal , Vector3 const& alignDir , Vector3 const& offset , bool invYDir )
{
Vector3 yLen = normal.cross( alignDir );
assert( yLen.length2() > 1e-4 );
yLen.normalize();
Vector3 xLen = yLen.cross( normal );
xLen *= 0.5f * w;
yLen *= 0.5f * h;
if ( invYDir )
yLen = -yLen;
Vector3 n = normal;
n.normalize();
int texLen = 2;
VertexType type = ( color ) ? CFVT_XYZ_N_CF1 : CFVT_XYZ_N;
//VertexType type = ( color ) ? CFVT_XYZ_CF1 : CFVT_XYZ;
MeshBuilder builder = MeshBuilder( type | CFVF_TEX1( 2 ) );
if ( color )
builder.setColor( color );
builder.setNormal( n );
builder.reserveVexterBuffer( 4 );
builder.reserveIndexBuffer( 12 );
builder.setPosition( offset - xLen - yLen );
builder.setTexCoord( 0 , 0 , 0 );
builder.addVertex();
builder.setPosition( offset + xLen - yLen );
builder.setTexCoord( 0 ,xTile, 0 );
builder.addVertex();
builder.setPosition( offset + xLen + yLen );
builder.setTexCoord( 0 , xTile , yTile );
builder.addVertex();
builder.setPosition( offset - xLen + yLen );
builder.setTexCoord( 0 , 0 , yTile );
builder.addVertex();
builder.addQuad( 0 , 1 , 2 , 3 );
return builder.createIndexTrangle( this , mat );
}
static int fillModelMesh( MeshBuilder& builder , mstudiotexture_t& texDesc , short* tri , Vector3 vtxPos[] , uint8* vtxBone )
{
int numTri = 0;
float fs = 1.0f / texDesc.width;
float ft = 1.0f / texDesc.height;
int base = 0;
if ( vtxBone )
{
while (1)
{
short nEle = *(tri++);
if ( nEle == 0)
break;
if ( nEle < 0 )
{
//triangle fan
nEle = -nEle;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int start = base++;
tri += 4;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev = base++;
tri += 4;
for( int n = 2 ; n < nEle ; ++n )
{
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int cur = base++;
builder.addTriangle( start , cur , prev );
++numTri;
prev = cur;
tri += 4;
}
}
else
{
//triangle strip
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev2 = base++;
tri += 4;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev = base++;
tri += 4;
for( int n = 2 ; n < nEle ; ++n )
{
builder.setPosition( vtxPos[ tri[0] ] );
builder.setBlendIndices( vtxBone[ tri[0] ] + 1 );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int cur = base++;
if ( n % 2 == 0 )
builder.addTriangle( prev2 , cur , prev );
else
builder.addTriangle( prev2 , prev , cur );
++numTri;
prev2 = prev;
prev = cur;
tri += 4;
}
}
}
}
else //vtxBone
{
while (1)
{
short nEle = *(tri++);
if ( nEle == 0)
break;
if ( nEle < 0 )
{
//triangle fan
nEle = -nEle;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int start = base++;
tri += 4;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev = base++;
tri += 4;
for( int n = 2 ; n < nEle ; ++n )
{
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int cur = base++;
builder.addTriangle( start , cur , prev );
++numTri;
prev = cur;
tri += 4;
}
}
else
{
//triangle strip
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev2 = base++;
tri += 4;
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int prev = base++;
tri += 4;
for( int n = 2 ; n < nEle ; ++n )
{
builder.setPosition( vtxPos[ tri[0] ] );
builder.setTexCoord( 0 , fs * tri[2] , ft * tri[3] );
builder.addVertex();
int cur = base++;
if ( n % 2 == 0 )
builder.addTriangle( prev2 , cur , prev );
else
builder.addTriangle( prev2 , prev , cur );
++numTri;
prev2 = prev;
prev = cur;
tri += 4;
}
}
}
}
return numTri;
}
