/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
float[] positions = model.GetPositions();
//int length = positions.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < positions.Length; i++)
// {
// array[i] = positions[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
// another way to do this:
this.positionBuffer = positions.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.positionBuffer);
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
float[] normals = model.GetNormals();
for (int i = 0; i < normals.Length; i++)
{
if (normals[i] < 0)
{
normals[i] = -normals[i];
}
}
//int length = normals.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < normals.Length; i++)
// {
// array[i] = normals[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
// another way to do this:
this.colorBuffer = normals.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.colorBuffer);
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
float[] normals = model.GetNormals();
//int length = normals.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < normals.Length; i++)
// {
// array[i] = normals[i];
// }
// buffer.UnmapBuffer();
//}
//this.normalBuffer = buffer;
// another way to do this:
this.normalBuffer = normals.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.normalBuffer);
}
else
{
return(null);
}
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public PropertyBufferPtr GetProperty(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (positionBufferPtr == null)
{
using (var buffer = new PropertyBuffer <float>(varNameInShader, 3, OpenGL.GL_FLOAT, BufferUsage.StaticDraw))
{
float[] positions = model.GetPositions();
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() as PropertyBufferPtr;
}
}
return(positionBufferPtr);
}
else if (bufferName == strColor)
{
if (colorBufferPtr == null)
{
using (var buffer = new PropertyBuffer <float>(varNameInShader, 3, OpenGL.GL_FLOAT, 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() as PropertyBufferPtr;
}
}
return(colorBufferPtr);
}
else if (bufferName == strNormal)
{
if (normalBufferPtr == null)
{
using (var buffer = new PropertyBuffer <float>(varNameInShader, 3, OpenGL.GL_FLOAT, 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() as PropertyBufferPtr;
}
}
return(normalBufferPtr);
}
else
{
return(null);
}
}