protected void SetTextureStacksAndSlices( int stacks, int slices )
{
if ( stacks == 0 )
{
stacks = 1;
}
if ( slices == 0 )
{
slices = 1;
}
// clear out any previous allocation
this.textureCoords.Clear();
// make room
this.textureCoords.Capacity = stacks * slices;
while ( this.textureCoords.Count < stacks * slices )
{
this.textureCoords.Add( new RectangleF() );
}
ushort coordIndex = 0;
// spread the U and V coordinates across the rects
for ( uint v = 0; v < stacks; ++v )
{
// (float)X / X is guaranteed to be == 1.0f for X up to 8 million, so
// our range of 1..256 is quite enough to guarantee perfect coverage.
float top = (float)v / (float)stacks;
float bottom = ( (float)v + 1 ) / (float)stacks;
for ( uint u = 0; u < slices; ++u )
{
RectangleF r = new RectangleF();
r.Left = (float)u / (float)slices;
r.Top = top;
r.Width = ( (float)u + 1 ) / (float)slices - r.Left;
r.Height = bottom - top;
this.textureCoords[ coordIndex ] = r;
++coordIndex;
}
}
Debug.Assert( coordIndex == stacks * slices );
}
internal static RectangleF Intersect( RectangleF lhs, RectangleF rhs )
{
RectangleF r;
r._left = lhs._left > rhs._left ? lhs._left : rhs._left;
r._top = lhs._top > rhs._top ? lhs._top : rhs._top;
r._right = lhs._right < rhs._right ? lhs._right : rhs._right;
r._bottom = lhs._bottom < rhs._bottom ? lhs._bottom : rhs._bottom;
return r;
}
public GlyphInfo( CodePoint id, UVRect rect, Real aspect )
{
this.codePoint = id;
this.uvRect = rect;
this.aspectRatio = aspect;
}
public RectangleF Merge( RectangleF rhs )
{
if ( Width == 0 )
{
this = rhs;
}
else
{
Left = System.Math.Min( Left, rhs.Left );
Right = System.Math.Max( Right, rhs.Right );
Top = System.Math.Min( Top, rhs.Top );
Bottom = System.Math.Max( Bottom, rhs.Bottom );
}
return this;
}
public RectangleF Intersect( RectangleF rhs )
{
return Intersect( this, rhs );
}
public RectangleF( RectangleF copy )
{
_left = copy._left;
_top = copy._top;
_right = copy._right;
_bottom = copy._bottom;
}
public GlyphInfo(CodePoint id, UVRect rect, Real aspect)
{
this.codePoint = id;
this.uvRect = rect;
this.aspectRatio = aspect;
}
public GlyphInfo( CodePoint id, UVRect rect, Real aspect )
{
codePoint = id;
uvRect = rect;
aspectRatio = aspect;
}
