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;
}
}
private static bool WriteUVData(float[] input, VRTF.ElementLayout layout, byte[] output, float scale)
{
bool okay = true;
switch (layout.Format)
{
case VRTF.ElementFormat.Short2:
for (int i = 0; i < input.Length; i++)
{
if ((short)Math.Round(input[i] / scale) != (long)Math.Round(input[i] / scale))
{
okay = false;
}
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] / scale)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
break;
case VRTF.ElementFormat.Short4:
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * short.MaxValue)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
break;
case VRTF.ElementFormat.Short4_DropShadow:
for (int i = 0; i < input.Length - 1; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * short.MaxValue)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[input.Length - 1] * 511)), 0, output, layout.Offset + (input.Length - 1) * sizeof(short), sizeof(short));
break;
default:
WriteFloatData(input, layout, output);
break;
}
return(okay);
}
private static void WritePositionData(float[] input, VRTF.ElementLayout layout, byte[] output, float max)
{
switch (layout.Format)
{
case VRTF.ElementFormat.UShort4N:
//scalar = (max >= 1) ? 511 : (ulong)short.MaxValue;
//-- could try "max < 1.0 / 512.0"?
//ulong scalar = (ulong)(max < 1 ? short.MaxValue : 511);
//scalar++;
//2011-08-30 changed to fixed 512 as LoveseatDanishModern had problems
ulong scalar = 512;
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * scalar)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
Array.Copy(BitConverter.GetBytes((short)(scalar == 512 ? 0 : scalar - 1)), 0, output, layout.Offset + 3 * sizeof(short), sizeof(short));
break;
default:
WriteFloatData(input, layout, output);
break;
}
}
private static void WriteFloatData(float[] input, VRTF.ElementLayout layout, byte[] output)
{
ulong scalar;
double max;
switch (layout.Format)
{
case VRTF.ElementFormat.Float1:
case VRTF.ElementFormat.Float2:
case VRTF.ElementFormat.Float3:
case VRTF.ElementFormat.Float4:
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes(input[i]), 0, output, layout.Offset + i * sizeof(float), sizeof(float));
}
break;
case VRTF.ElementFormat.ColorUByte4:
switch (layout.Usage)
{
case VRTF.ElementUsage.Colour:
for (int i = 0; i < input.Length; i++)
{
output[layout.Offset + i] = (byte)Math.Round(input[i] * byte.MaxValue);
}
break;
case VRTF.ElementUsage.BlendWeight:
for (int i = 0; i < input.Length; i++)
{
output[layout.Offset + kColorUByte4Map[i]] = (byte)Math.Round(input[i] * byte.MaxValue);
}
break;
case VRTF.ElementUsage.Normal:
case VRTF.ElementUsage.Tangent:
// -0.98828125 == (((0.5 + 1) / 128f) - 1)
for (int i = 0; i < input.Length - 1; i++)
{
output[layout.Offset + 2 - i] = (byte)(input[i] < -0.98828125 ? 0 : (Math.Round((input[i] + 1) * 128) - 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: +1 > 0 > -1
// map step1: +2 > +1 > 0
// map step2: 255 > 127.5 > 0
//for (int i = 0; i < input.Length - 1; i++)
// output[layout.Offset + 2 - i] = (byte)Math.Round((input[i] + 1) * 127.5);
if (input[input.Length - 1] == -1)
{
output[layout.Offset + 3] = 0;
}
else if (input[input.Length - 1] == 0)
{
output[layout.Offset + 3] = 127;
}
else if (input[input.Length - 1] == 1)
{
output[layout.Offset + 3] = 255;
}
else
{
System.Diagnostics.Debug.WriteLine(String.Format("Unexpected handedness {0}.", input[input.Length - 1]));
}
break;
}
break;
case VRTF.ElementFormat.Short2:
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * short.MaxValue)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
break;
case VRTF.ElementFormat.Short4:
max = Math.Ceiling(input.Max(x => Math.Abs(x)));
scalar = (ulong)(max < 1 ? short.MaxValue : short.MaxValue / max);
//scalar++;
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * scalar)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
Array.Copy(BitConverter.GetBytes((short)(scalar /*- 1/**/)), 0, output, layout.Offset + 3 * sizeof(short), sizeof(short));
break;
case VRTF.ElementFormat.UShort4N:
max = Math.Ceiling(input.Max(x => Math.Abs(x)));
scalar = (ulong)(max < 1.0 ? short.MaxValue : 512);
//scalar++;
for (int i = 0; i < input.Length; i++)
{
Array.Copy(BitConverter.GetBytes((short)Math.Round(input[i] * scalar)), 0, output, layout.Offset + i * sizeof(short), sizeof(short));
}
Array.Copy(BitConverter.GetBytes((short)(scalar == 512 ? 0 : scalar /*- 1/**/)), 0, output, layout.Offset + 3 * sizeof(short), sizeof(short));
break;
}
}
//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;
}
}
