public static void ReadUVData(byte[] data, VRTF.ElementLayout layout, ref float[] output, float scale)
{
byte[] element = new byte[VRTF.ByteSizeFromFormat(layout.Format)];
Array.Copy(data, layout.Offset, element, 0, element.Length);
switch (layout.Format)
{
case VRTF.ElementFormat.Short2:
for (int i = 0; i < output.Length; i++)
{
output[i] += (float)BitConverter.ToInt16(element, i * sizeof(short)) * scale;
}
break;
case VRTF.ElementFormat.Short4:
for (int i = 0; i < output.Length; i++)
{
output[i] += (float)BitConverter.ToInt16(element, i * sizeof(short)) / short.MaxValue;
}
break;
case VRTF.ElementFormat.Short4_DropShadow:
for (int i = 0; i < output.Length - 1; i++)
{
output[i] += (float)BitConverter.ToInt16(element, i * sizeof(short)) / short.MaxValue;
}
output[output.Length - 1] += (float)BitConverter.ToInt16(element, (output.Length - 1) * sizeof(short)) / 511;
break;
default:
ReadFloatData(data, layout, ref output);
break;
}
}
public static VRTF CreateDefaultForSunShadow()
{
VRTF v = new Default(0, null);
v.Layouts.Add(new ElementLayout(0, null, ElementFormat.Short4, 0, ElementUsage.Position, 0));
v.Stride = v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum();
return(v);
}
public static VRTF CreateDefaultForDropShadow()
{
VRTF v = new Default(0, null);
v.Layouts.Add(new ElementLayout(0, null, ElementFormat.UShort4N, 0, ElementUsage.Position, 0));
v.Layouts.Add(new ElementLayout(0, null, ElementFormat.Short4_DropShadow, (byte)v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum(), ElementUsage.UV, 0));
// above replaces following two lines, following discussion with Atavera on 25 May 2012.
//v.Layouts.Add(new ElementLayout(0, null, ElementFormat.Short2, (byte)v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum(), ElementUsage.UV, 0));
//v.Layouts.Add(new ElementLayout(0, null, ElementFormat.Short2, (byte)v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum(), ElementUsage.UV, 1));
//--
//v.Layouts.Add(new ElementLayout(0, null, ElementFormat.ColorUByte4, (byte)v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum(), ElementUsage.Normal, 0));
v.Stride = v.Layouts.Select(x => VRTF.ByteSizeFromFormat(x.Format)).Sum();
return(v);
}
private static bool SetVertices(MemoryStream s, VRTF vrtf, IEnumerable <Vertex> vertices, float[] uvscales)
{
bool okay = true;
PositionMinMax(vrtf, vertices);
byte[] output = new byte[vrtf.Stride];
var position = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Position);
var normal = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Normal);
var uv = vrtf.Layouts
.Where(x => x.Usage == VRTF.ElementUsage.UV)
.ToArray();
var blendIndices = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendIndex);
var blendWeights = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendWeight);
var tangents = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Tangent);
var color = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Colour);
if (uvscales == null)
{
uvscales = defaultUVScales;
}
foreach (var v in vertices)
{
if (v.Position != null)
{
WritePositionData(v.Position, position, output, positionMax);
}
if (v.Normal != null)
{
WriteFloatData(v.Normal, normal, output);
}
for (int u = 0; u < uv.Length; u++)
{
var scale = u < uvscales.Length && uvscales[u] != 0 ? uvscales[u] : uvscales[0];
if (v.UV[u] != null)
{
if (!WriteUVData(v.UV[u], uv[u], output, scale))
{
okay = false;
}
}
}
if (v.BlendIndices != null)
{
Array.Copy(v.BlendIndices, 0, output, blendIndices.Offset, VRTF.ByteSizeFromFormat(blendIndices.Format));
}
if (v.BlendWeights != null)
{
WriteFloatData(v.BlendWeights, blendWeights, output);
}
if (v.Tangents != null)
{
WriteFloatData(v.Tangents, tangents, output);
}
if (v.Color != null)
{
WriteFloatData(v.Color, color, output);
}
s.Write(output, 0, output.Length);
}
s.Flush();
return(okay);
}
//Currently not supported:
//UByte4N,
//Short2N, Short4N, UShort2N,
//Dec3N, UDec3N,
//Float16_2, Float16_4
public static void ReadFloatData(byte[] data, VRTF.ElementLayout layout, ref float[] output)
{
byte[] element = new byte[VRTF.ByteSizeFromFormat(layout.Format)];
Array.Copy(data, layout.Offset, element, 0, element.Length);
float scalar;
switch (layout.Format)
{
case VRTF.ElementFormat.Float1:
case VRTF.ElementFormat.Float2:
case VRTF.ElementFormat.Float3:
case VRTF.ElementFormat.Float4:
for (int i = 0; i < output.Length; i++)
{
output[i] += BitConverter.ToSingle(element, i * sizeof(float));
}
break;
case VRTF.ElementFormat.ColorUByte4:
switch (layout.Usage)
{
case VRTF.ElementUsage.Colour:
for (int i = 0; i < output.Length; i++)
{
output[i] += element[i] / (float)byte.MaxValue;
}
break;
case VRTF.ElementUsage.BlendWeight:
for (int i = 0; i < output.Length; i++)
{
output[i] += element[kColorUByte4Map[i]] / (float)byte.MaxValue;
}
break;
case VRTF.ElementUsage.Normal:
case VRTF.ElementUsage.Tangent:
for (int i = 0; i < output.Length - 1; i++)
{
output[i] += element[2 - i] == 0 ? -1 : (((element[2 - i] + 1) / 128f) - 1);
}
//--
// Wes: (signed char) bytes[0]=vert[2+vrtfp.offset[j]];
// (float) norms[0]=(float)bytes[0];
// norms[0]=(norms[0]<(float)0.0)?(norms[0]+(float)128.0):(norms[0]-(float)128.0);
//???
//--
// input: 255 > 128 > 127 > 0
// map step1: +2 > 0
// map step2: +1 > -1
//for (int i = 0; i < output.Length - 1; i++)
// output[i] += (element[2 - i] / 127.5f) - 1f;
switch (element[3])
{
case 0: output[output.Length - 1] = -1f; break; // -1 determinant
case 127: output[output.Length - 1] = 0f; break; // There is no determinant
case 255: output[output.Length - 1] = +1f; break; // +1 determinant
default: System.Diagnostics.Debug.WriteLine(String.Format("Unexpected handedness {0}.", element[3])); break;
}
break;
}
break;
case VRTF.ElementFormat.Short2:
for (int i = 0; i < output.Length; i++)
{
output[i] += BitConverter.ToInt16(element, i * sizeof(short)) / (float)short.MaxValue;
}
break;
case VRTF.ElementFormat.Short4:
scalar = BitConverter.ToUInt16(element, 3 * sizeof(short));
if (scalar == 0)
{
scalar = short.MaxValue;
}
//scalar++;
for (int i = 0; i < output.Length; i++)
{
output[i] += BitConverter.ToInt16(element, i * sizeof(short)) / scalar;
}
break;
case VRTF.ElementFormat.UShort4N:
scalar = BitConverter.ToUInt16(element, 3 * sizeof(ushort));
if (scalar == 0)
{
scalar = 511;
}
//scalar++;
for (int i = 0; i < output.Length; i++)
{
output[i] += BitConverter.ToInt16(element, i * sizeof(short)) / scalar;
}
break;
}
}
public Vertex[] GetVertices(VRTF vrtf, long offset, int count, float[] uvscales)
{
long streamOffset = offset;
Stream s = new MemoryStream(mBuffer);
s.Seek(streamOffset, SeekOrigin.Begin);
var position = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Position);
var normal = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Normal);
var uv = vrtf.Layouts
.Where(x => x.Usage == VRTF.ElementUsage.UV)
.ToArray();
var blendIndices = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendIndex);
var blendWeights = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.BlendWeight);
var tangents = vrtf.Layouts
.FirstOrDefault(x => x.Usage == VRTF.ElementUsage.Tangent);
var 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++)
{
var u = uv[j];
float[] uvPoints = new float[VRTF.FloatCountFromFormat(u.Format)];
var 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);
}