private void GetChannels(int[] version)
{
m_Channels = new ChannelInfo[6];
for (int i = 0; i < 6; i++)
{
m_Channels[i] = new ChannelInfo();
}
for (var s = 0; s < m_Streams.Length; s++)
{
var m_Stream = m_Streams[s];
var channelMask = new BitArray(new[] { (int)m_Stream.channelMask });
byte offset = 0;
for (int i = 0; i < 6; i++)
{
if (channelMask.Get(i))
{
var m_Channel = m_Channels[i];
m_Channel.stream = (byte)s;
m_Channel.offset = offset;
switch (i)
{
case 0: //kShaderChannelVertex
case 1: //kShaderChannelNormal
m_Channel.format = 0; //kChannelFormatFloat
m_Channel.dimension = 3;
break;
case 2: //kShaderChannelColor
m_Channel.format = 2; //kChannelFormatColor
m_Channel.dimension = 4;
break;
case 3: //kShaderChannelTexCoord0
case 4: //kShaderChannelTexCoord1
m_Channel.format = 0; //kChannelFormatFloat
m_Channel.dimension = 2;
break;
case 5: //kShaderChannelTangent
m_Channel.format = 0; //kChannelFormatFloat
m_Channel.dimension = 4;
break;
}
offset += (byte)(m_Channel.dimension * MeshHelper.GetFormatSize(version, m_Channel.format));
}
}
}
}
private void GetStreams(int[] version)
{
var streamCount = m_Channels.Max(x => x.stream) + 1;
m_Streams = new StreamInfo[streamCount];
uint offset = 0;
for (int s = 0; s < streamCount; s++)
{
uint chnMask = 0;
uint stride = 0;
for (int chn = 0; chn < m_Channels.Length; chn++)
{
var m_Channel = m_Channels[chn];
if (m_Channel.stream == s)
{
if (m_Channel.dimension > 0)
{
chnMask |= 1u << chn;
stride += m_Channel.dimension * MeshHelper.GetFormatSize(version, m_Channel.format);
}
}
}
m_Streams[s] = new StreamInfo
{
channelMask = chnMask,
offset = offset,
stride = stride,
dividerOp = 0,
frequency = 0
};
offset += m_VertexCount * stride;
//static size_t AlignStreamSize (size_t size) { return (size + (kVertexStreamAlign-1)) & ~(kVertexStreamAlign-1); }
offset = (offset + (16u - 1u)) & ~(16u - 1u);
}
}
