/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexAttributeBufferPtr GetVertexAttributeBufferPtr(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (positionBufferPtr == null)
{
using (var buffer = new VertexAttributeBuffer <float>(varNameInShader, VertexAttributeConfig.Vec3, BufferUsage.StaticDraw))
{
float[] positions = model.GetPositions();
//List<vec3> pos = new List<vec3>();
//for (int i = 0; i < positions.Length; i += 3)
//{
// pos.Add(new vec3(positions[i], positions[i + 1], positions[i + 2]));
//}
//IBoundingBox box = pos.Move2Center();
//vec3 lengths = box.MaxPosition - box.MinPosition;
buffer.Create(positions.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < positions.Length; i++)
{
array[i] = positions[i];
}
}
positionBufferPtr = buffer.GetBufferPtr();
}
}
return(positionBufferPtr);
}
else if (bufferName == strColor)
{
if (colorBufferPtr == null)
{
using (var buffer = new VertexAttributeBuffer <float>(varNameInShader, VertexAttributeConfig.Vec3, BufferUsage.StaticDraw))
{
float[] normals = model.GetNormals();
buffer.Create(normals.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < normals.Length; i++)
{
array[i] = normals[i];
}
}
colorBufferPtr = buffer.GetBufferPtr();
}
}
return(colorBufferPtr);
}
else if (bufferName == strNormal)
{
if (normalBufferPtr == null)
{
using (var buffer = new VertexAttributeBuffer <float>(varNameInShader, VertexAttributeConfig.Vec3, BufferUsage.StaticDraw))
{
float[] normals = model.GetNormals();
buffer.Create(normals.Length);
unsafe
{
var array = (float *)buffer.Header.ToPointer();
for (int i = 0; i < normals.Length; i++)
{
array[i] = normals[i];
}
}
normalBufferPtr = buffer.GetBufferPtr();
}
}
return(normalBufferPtr);
}
else
{
return(null);
}
}