public Vertex[] GetVertices(VRTF vrtf, long offset, int count, float[] uvscales)
{
long streamOffset = offset;
Stream s = new MemoryStream(mBuffer);
s.Seek(streamOffset, SeekOrigin.Begin);
VRTF.ElementLayout position = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Position);
VRTF.ElementLayout normal = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Normal);
VRTF.ElementLayout[] uv = vrtf.Layouts
.Where(x => x.Usage == VRTF.ElementUsage.UV)
.ToArray();
VRTF.ElementLayout blendIndices = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendIndex);
VRTF.ElementLayout blendWeights = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendWeight);
VRTF.ElementLayout tangents = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Tangent);
VRTF.ElementLayout color = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Colour);
Vertex[] verts = new Vertex[count];
if (uvscales == null)
{
uvscales = new float[3];
}
for (int i = 0; i < count; i++)
{
Vertex v = new Vertex();
byte[] data = new byte[vrtf.Stride];
s.Read(data, 0, vrtf.Stride);
if (position != null)
{
float[] posPoints = new float[VRTF.FloatCountFromFormat(position.Format)];
ReadFloatData(data, position, ref posPoints);
v.Position = posPoints;
}
if (normal != null)
{
float[] normPoints = new float[VRTF.FloatCountFromFormat(normal.Format)];
ReadFloatData(data, normal, ref normPoints);
v.Normal = normPoints;
}
v.UV = new float[uv.Length][];
for (int j = 0; j < uv.Length; j++)
{
VRTF.ElementLayout u = uv[j];
float[] uvPoints = new float[VRTF.FloatCountFromFormat(u.Format)];
float scale = j < uvscales.Length && uvscales[j] != 0 ? uvscales[j] : uvscales[0];
ReadUVData(data, u, ref uvPoints, scale);
v.UV[j] = uvPoints;
}
if (blendIndices != null)
{
byte[] blendIPoints = new byte[VRTF.ByteSizeFromFormat(blendIndices.Format)];
Array.Copy(data, blendIndices.Offset, blendIPoints, 0, blendIPoints.Length);
v.BlendIndices = blendIPoints;
}
if (blendWeights != null)
{
float[] blendWPoints = new float[VRTF.FloatCountFromFormat(blendWeights.Format)];
ReadFloatData(data, blendWeights, ref blendWPoints);
v.BlendWeights = blendWPoints;
}
if (tangents != null)
{
float[] tangentPoints = new float[VRTF.FloatCountFromFormat(tangents.Format)];
ReadFloatData(data, tangents, ref tangentPoints);
v.Tangents = tangentPoints;
}
if (color != null)
{
float[] colorPoints = new float[VRTF.FloatCountFromFormat(color.Format)];
ReadFloatData(data, color, ref colorPoints);
v.Color = colorPoints;
}
verts[i] = v;
}
return(verts);
}
