/// <summary>
/// Writes a vertex element to the stream.
/// </summary>
/// <param name="x">The X component.</param>
/// <param name="y">The Y component.</param>
/// <param name="z">The Z component.</param>
/// <param name="w">The W component.</param>
/// <param name="layout">The layout of the element.</param>
public void WriteElement(float x, float y, float z, float w, VertexElementLayout layout)
{
TransformElement(ref x, ref y, ref z, ref w, layout.Usage);
// This is only enough to support s_rigid_vertex for now
uint val = 0;
switch (layout.Type)
{
case VertexElementType.UDec4N:
val = (uint) (x*1023.0f) & 0x3FF;
val |= ((uint) (y*1023.0f) & 0x3FF) << 10;
val |= ((uint) (z*1023.0f) & 0x3FF) << 20;
val |= (uint) (w*3.0f) << 30;
_writer.WriteUInt32(val);
break;
case VertexElementType.UShort2N:
_writer.WriteUInt16((ushort) (x*65535.0f));
_writer.WriteUInt16((ushort) (y*65535.0f));
_writer.WriteUInt16((ushort) (z*65535.0f));
break;
case VertexElementType.DHen3N:
val = (((uint) (x*511.0f) << 22) & 0xFFC00000) >> 22;
val |= (((uint) (y*1023.0f) << 21) & 0xFFE00000) >> 11;
val |= ((uint) (z*1023.0f) << 21) & 0xFFE00000;
_writer.WriteUInt32(val);
break;
default:
throw new NotSupportedException("Unsupported vertex element type: " +
Enum.GetName(typeof (VertexElementType), layout.Type));
}
}
public void ProcessVertexElement(float x, float y, float z, float w, VertexElementLayout layout)
{
switch (layout.Usage)
{
case VertexElementUsage.Position:
_output.WriteLine("v {0} {1} {2}", x, y, z);
break;
case VertexElementUsage.Normal:
_output.WriteLine("vn {0} {1} {2}", x, y, z);
break;
case VertexElementUsage.TexCoords:
_output.WriteLine("vt {0} {1} {2}", x, y, z);
break;
}
}
/// <summary>
/// Adds an element layout to the vertex layout.
/// </summary>
/// <param name="element">The element layout to add.</param>
public void AddElement(VertexElementLayout element)
{
_elements.Add(element);
_availableUsages.Add(element.Usage);
}
/// <summary>
/// Reads a vertex element from a stream and sends it to an IVertexProcessor.
/// </summary>
/// <param name="reader">The stream to read from. It should be positioned at the start of the element.</param>
/// <param name="element">The layout of the element to read.</param>
/// <param name="boundingBox">The bounding box to transform the element with. Can be null.</param>
/// <param name="processor">The IVertexProcessor to send the element to.</param>
private static void ReadElement(IReader reader, VertexElementLayout element, BoundingBox boundingBox,
IVertexProcessor processor)
{
// EW EW EW
// TODO: Implement everything, this is just enough to load some Reach vertices for now...
float x = 0, y = 0, z = 0, w = 1;
uint value;
switch (element.Type)
{
case VertexElementType.Float2:
x = reader.ReadFloat();
y = reader.ReadFloat();
break;
case VertexElementType.Float3:
x = reader.ReadFloat();
y = reader.ReadFloat();
z = reader.ReadFloat();
break;
case VertexElementType.Float4:
x = reader.ReadFloat();
y = reader.ReadFloat();
z = reader.ReadFloat();
w = reader.ReadFloat();
break;
case VertexElementType.UByte4:
x = reader.ReadByte();
y = reader.ReadByte();
z = reader.ReadByte();
w = reader.ReadByte();
break;
case VertexElementType.UByte4N:
x = reader.ReadByte()/255.0f;
y = reader.ReadByte()/255.0f;
z = reader.ReadByte()/255.0f;
w = reader.ReadByte()/255.0f;
break;
case VertexElementType.Byte4N:
x = reader.ReadSByte()/127.0f;
y = reader.ReadSByte()/127.0f;
z = reader.ReadSByte()/127.0f;
w = reader.ReadSByte()/127.0f;
break;
case VertexElementType.Float16_2:
x = Half.ToHalf(reader.ReadUInt16());
y = Half.ToHalf(reader.ReadUInt16());
break;
case VertexElementType.Float16_4:
x = Half.ToHalf(reader.ReadUInt16());
y = Half.ToHalf(reader.ReadUInt16());
z = Half.ToHalf(reader.ReadUInt16());
w = Half.ToHalf(reader.ReadUInt16());
break;
case VertexElementType.UShort2:
x = reader.ReadUInt16();
y = reader.ReadUInt16();
break;
case VertexElementType.UShort2N:
x = reader.ReadUInt16()/65535.0f;
y = reader.ReadUInt16()/65535.0f;
break;
case VertexElementType.UShort4N:
x = reader.ReadUInt16()/65535.0f;
y = reader.ReadUInt16()/65535.0f;
z = reader.ReadUInt16()/65535.0f;
w = reader.ReadUInt16()/65535.0f;
break;
case VertexElementType.Short4N:
x = reader.ReadInt16()/32767.0f;
y = reader.ReadInt16()/32767.0f;
z = reader.ReadInt16()/32767.0f;
w = reader.ReadInt16()/32767.0f;
break;
case VertexElementType.D3DColor:
w = reader.ReadByte()/255.0f; // W is set here because alpha comes first but ends up last in the vector
y = reader.ReadByte()/255.0f;
z = reader.ReadByte()/255.0f;
x = reader.ReadByte()/255.0f;
break;
case VertexElementType.DHen3N:
value = reader.ReadUInt32();
x = (((int) ((value << 22) & 0xFFC00000)) >> 22)/511.0f;
y = (((int) ((value << 11) & 0xFFE00000)) >> 21)/1023.0f;
z = (((int) (value & 0xFFE00000)) >> 21)/1023.0f;
break;
case VertexElementType.UDec4N:
value = reader.ReadUInt32();
x = (value & 0x3FF)/1023.0f;
y = ((value >> 10) & 0x3FF)/1023.0f;
z = ((value >> 20) & 0x3FF)/1023.0f;
w = (value >> 30)/3.0f;
break;
default:
throw new NotSupportedException("Unsupported vertex element type: " +
Enum.GetName(typeof (VertexElementType), element.Type));
}
if (boundingBox != null)
TransformElement(ref x, ref y, ref z, ref w, element.Usage, boundingBox);
if (processor != null)
processor.ProcessVertexElement(x, y, z, w, element);
}
/// <summary>
/// Adds an element layout to the vertex layout.
/// </summary>
/// <param name="element">The element layout to add.</param>
public void AddElement(VertexElementLayout element)
{
_elements.Add(element);
_availableUsages.Add(element.Usage);
}
