internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(3);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (lastVertexId - 2 <= id && id <= lastVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
/// 设置要高亮显示的图元。
/// </summary>
/// <param name="mode">要高亮显示的图元类型</param>
/// <param name="indexes">要高亮显示的图元的索引。</param>
public void SetHighlightIndexes(DrawMode mode, params uint[] indexes)
{
var indexBufferPtr = this.indexBufferPtr as OneIndexBufferPtr;
int indexesLength = indexes.Length;
if (indexesLength > this.maxElementCount)
{
using (var buffer = new OneIndexBuffer <uint>(
indexBufferPtr.Mode, BufferUsage.DynamicDraw))
{
buffer.Alloc(indexesLength);
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
this.maxElementCount = indexesLength;
}
OpenGL.BindBuffer(BufferTarget.ElementArrayBuffer, indexBufferPtr.BufferId);
IntPtr pointer = OpenGL.MapBuffer(BufferTarget.ElementArrayBuffer, MapBufferAccess.WriteOnly);
unsafe
{
var array = (uint *)pointer.ToPointer();
for (int i = 0; i < indexesLength; i++)
{
array[i] = indexes[i];
}
}
OpenGL.UnmapBuffer(BufferTarget.ElementArrayBuffer);
OpenGL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
indexBufferPtr.Mode = mode;
indexBufferPtr.ElementCount = indexesLength;
}
/// <summary>
/// 设置要高亮显示的图元。
/// </summary>
/// <param name="mode">要高亮显示的图元类型</param>
/// <param name="indexes">要高亮显示的图元的索引。</param>
public void SetHighlightIndexes(DrawMode mode, params uint[] indexes)
{
int indexesLength = indexes.Length;
if (indexesLength > this.maxElementCount)
{
IndexBufferPtr original = this.indexBufferPtr;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt,
mode, BufferUsage.DynamicDraw))
{
buffer.Create(indexesLength);
this.indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
this.maxElementCount = indexesLength;
original.Dispose();
}
var indexBufferPtr = this.indexBufferPtr as OneIndexBufferPtr;
IntPtr pointer = indexBufferPtr.MapBuffer(MapBufferAccess.WriteOnly);
unsafe
{
var array = (uint *)pointer.ToPointer();
for (int i = 0; i < indexesLength; i++)
{
array[i] = indexes[i];
}
}
indexBufferPtr.UnmapBuffer();
indexBufferPtr.Mode = mode;
indexBufferPtr.ElementCount = indexesLength;
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(8);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 1; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 1;
array[4] = lastVertexId - 3; array[5] = lastVertexId - 2;
array[6] = lastVertexId - 0; array[7] = lastVertexId - 3;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id + 3 == lastVertexId)
{
return(new uint[] { id + 3, id, });
}
else
{
return(new uint[] { id - 1, id, });
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.LineLoop, BufferUsage.StaticDraw))
{
buffer.Create(indexList.Count);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[0])
{
return(new uint[] { indexList[indexList.Count - 1], id, });
}
else
{
uint[] result = null;
for (int i = 1; i < indexList.Count; i++)
{
if (id == indexList[i])
{
result = new uint[] { indexList[i - 1], indexList[i], };
break;
}
}
if (result != null)
{
return(result);
}
else
{
throw new Exception("This should not happen!");
}
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count != 4)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(8);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = indexList[0]; array[1] = indexList[1];
array[2] = indexList[1]; array[3] = indexList[2];
array[4] = indexList[2]; array[5] = indexList[3];
array[6] = indexList[3]; array[7] = indexList[0];
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[1])
{
return(new uint[] { indexList[0], indexList[1], });
}
else if (id == indexList[2])
{
return(new uint[] { indexList[1], indexList[2], });
}
else if (id == indexList[3])
{
return(new uint[] { indexList[2], indexList[3], });
}
else if (id == indexList[0])
{
return(new uint[] { indexList[2], indexList[0], });
}
else
{
throw new Exception("This should not happen!");
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveInfo primitiveInfo,
OneIndexRenderer modernRenderer)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.Length != 3)
{
throw new ArgumentException();
}
//if (indexList[0] == indexList[1]) { return new uint[] { indexList[0], indexList[2], }; }
//else if (indexList[0] == indexList[2]) { return new uint[] { indexList[0], indexList[1], }; }
//else if (indexList[1] == indexList[2]) { return new uint[] { indexList[1], indexList[0], }; }
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(6);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = indexList[0]; array[1] = indexList[1];
array[2] = indexList[1]; array[3] = indexList[2];
array[4] = indexList[2]; array[5] = indexList[0];
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
indexBufferPtr.Dispose();
if (id == indexList[1])
{
return(new uint[] { indexList[0], indexList[1], });
}
else if (id == indexList[2])
{
return(new uint[] { indexList[1], indexList[2], });
}
else if (id == indexList[0])
{
return(new uint[] { indexList[2], indexList[0], });
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
protected override void DoInitialize()
{
base.DoInitialize();
foreach (var item in propertyNameMap)
{
PropertyBufferPtr bufferPtr = this.bufferable.GetProperty(
item.NameInIBufferable, item.VarNameInShader);
if (bufferPtr == null)
{
throw new Exception();
}
if (item.NameInIBufferable == positionNameInIBufferable)
{
this.positionBufferPtr = new PropertyBufferPtr(
"in_Position",// in_Postion same with in the PickingShader.vert shader
bufferPtr.BufferId,
bufferPtr.DataSize,
bufferPtr.DataType,
bufferPtr.Length,
bufferPtr.ByteLength);
break;
}
}
// init index buffer
{
//IndexBufferPtr indexBufferPtr = this.bufferable.GetIndex();
using (var buffer = new OneIndexBuffer <uint>(
this.indexBufferPtr.Mode, BufferUsage.DynamicDraw))
{
buffer.Create(this.positionBufferPtr.ByteLength / (this.positionBufferPtr.DataSize * this.positionBufferPtr.DataTypeByteLength));
this.indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
{
var oneIndexBufferPtr = this.indexBufferPtr as OneIndexBufferPtr;
this.maxElementCount = oneIndexBufferPtr.ElementCount;
oneIndexBufferPtr.ElementCount = 0;// 高亮0个图元
}
//this.bufferable = null;
//this.shaderCodes = null;
//this.propertyNameMap = null;
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(8);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 0; array[1] = lastVertexId - 2;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 3;
array[4] = lastVertexId - 3; array[5] = lastVertexId - 1;
array[6] = lastVertexId - 1; array[7] = lastVertexId - 0;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
indexBufferPtr.Dispose();
if (id + 2 == lastVertexId)
{
return(new uint[] { lastVertexId - 0, lastVertexId - 2, });
}
else if (id + 3 == lastVertexId)
{
return(new uint[] { lastVertexId - 2, lastVertexId - 3 });
}
else if (id + 1 == lastVertexId)
{
return(new uint[] { lastVertexId - 3, lastVertexId - 1, });
}
else if (id + 0 == lastVertexId)
{
return(new uint[] { lastVertexId - 1, lastVertexId - 0, });
}
else
{
throw new Exception("This should not happen!");
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Alloc(indexList.Count);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id != uint.MaxValue)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveInfo primitiveInfo,
OneIndexRenderer modernRenderer)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.Length < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(indexList.Length);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Length; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
indexBufferPtr.Dispose();
if (id != uint.MaxValue)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBufferPtr GetIndexBufferPtr()
{
if (indexBufferPtr == null)
{
using (var buffer = new OneIndexBuffer(IndexElementType.UByte, DrawMode.Quads, BufferUsage.StaticDraw))
{
buffer.Create(indexes.Length);
unsafe
{
var array = (byte *)buffer.Header.ToPointer();
for (int i = 0; i < indexes.Length; i++)
{
array[i] = indexes[i];
}
}
indexBufferPtr = buffer.GetBufferPtr();
}
}
return(indexBufferPtr);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
using (var buffer = new OneIndexBuffer <uint>(
this.model.mode, BufferUsage.StaticDraw))
{
buffer.Create(this.model.indexes.Length);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < this.model.indexes.Length; i++)
{
array[i] = this.model.indexes[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
return(indexBufferPtr);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
using (var buffer = new OneIndexBuffer <byte>(DrawMode.Triangles, BufferUsage.StaticDraw))
{
buffer.Create(TetrahedronModel.index.Length);
unsafe
{
var array = (byte *)buffer.Header.ToPointer();
for (int i = 0; i < TetrahedronModel.index.Length; i++)
{
array[i] = TetrahedronModel.index[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
return(indexBufferPtr);
}
/// <summary>
/// 在三角形图元中拾取指定位置的Point
/// </summary>
/// <param name="arg">渲染参数</param>
/// <param name="x">指定位置</param>
/// <param name="y">指定位置</param>
/// <param name="lastVertexId">三角形图元的最后一个顶点</param>
/// <param name="modernRenderer">目标Renderer</param>
/// <returns></returns>
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
// 创建临时索引
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(3);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
indexBufferPtr.Dispose();
// 对比临时索引，找到那个Line
if (lastVertexId - 2 <= id && id <= lastVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
/// 在三角形图元中拾取指定位置的Line
/// </summary>
/// <param name="arg">渲染参数</param>
/// <param name="x">指定位置</param>
/// <param name="y">指定位置</param>
/// <param name="lastVertexId">三角形图元的最后一个顶点</param>
/// <param name="modernRenderer">目标Renderer</param>
/// <returns></returns>
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
// 创建临时索引
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(6);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 1; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 1;
array[4] = lastVertexId - 0; array[5] = lastVertexId - 2;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
// 对比临时索引，找到那个Line
if (id + 2 == lastVertexId)
{
return(new uint[] { id + 2, id, });
}
else
{
return(new uint[] { id - 1, id, });
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
using (var buffer = new OneIndexBuffer <ushort>(DrawMode.Triangles, BufferUsage.StaticDraw))
{
ushort[] faces = model.GetFaces();
buffer.Create(faces.Length);
unsafe
{
var array = (ushort *)buffer.Header.ToPointer();
for (int i = 0; i < faces.Length; i++)
{
array[i] = (ushort)(faces[i] - 1);
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
return(indexBufferPtr);
}
/// <summary>
/// 将共享点前移，然后重新渲染、拾取
/// </summary>
/// <param name="recognizedPrimitiveIndex0"></param>
/// <param name="recognizedPrimitiveIndex1"></param>
/// <param name="drawMode"></param>
/// <param name="oneIndexBufferPtr"></param>
/// <param name="lastIndex0"></param>
/// <param name="lastIndex1"></param>
private void AssembleIndexBuffer(
RecognizedPrimitiveIndex recognizedPrimitiveIndex0,
RecognizedPrimitiveIndex recognizedPrimitiveIndex1,
DrawMode drawMode,
out OneIndexBufferPtr oneIndexBufferPtr,
out uint lastIndex0, out uint lastIndex1)
{
List <uint> indexArray = ArrangeIndexes(
recognizedPrimitiveIndex0, recognizedPrimitiveIndex1, drawMode,
out lastIndex0, out lastIndex1);
if (indexArray.Count !=
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count)
{
throw new Exception();
}
using (var indexBuffer = new OneIndexBuffer <uint>(drawMode, BufferUsage.StaticDraw))
{
indexBuffer.Create(
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count);
unsafe
{
var array = (uint *)indexBuffer.Header.ToPointer();
for (int i = 0; i < indexArray.Count; i++)
{
array[i] = indexArray[i];
}
}
oneIndexBufferPtr = indexBuffer.GetBufferPtr() as OneIndexBufferPtr;
}
}
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
using (var buffer = new OneIndexBuffer <ushort>(DrawMode.Triangles, BufferUsage.StaticDraw))
{
buffer.Alloc(model.faces.Count * 3);
unsafe
{
var array = (ushort *)buffer.Header.ToPointer();
for (int i = 0; i < model.faces.Count; i++)
{
array[i * 3 + 0] = (ushort)(model.faces[i].Item1 - 1);
array[i * 3 + 1] = (ushort)(model.faces[i].Item2 - 1);
array[i * 3 + 2] = (ushort)(model.faces[i].Item3 - 1);
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
return(indexBufferPtr);
}
/// <summary>
///
/// </summary>
protected override void DoInitialize()
{
// init shader program.
ShaderProgram program = this.shaderCodes.CreateProgram();
// init property buffer objects.
VertexAttributeBufferPtr positionBufferPtr = null;
IBufferable model = this.Model;
VertexAttributeBufferPtr[] vertexAttributeBufferPtrs;
{
var list = new List <VertexAttributeBufferPtr>();
foreach (var item in this.attributeMap)
{
VertexAttributeBufferPtr bufferPtr = model.GetVertexAttributeBufferPtr(
item.NameInIBufferable, item.VarNameInShader);
if (bufferPtr == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
if (item.NameInIBufferable == positionNameInIBufferable)
{
positionBufferPtr = new VertexAttributeBufferPtr(
"in_Position",// in_Postion same with in the PickingShader.vert shader
bufferPtr.BufferId,
bufferPtr.Config,
bufferPtr.Length,
bufferPtr.ByteLength);
}
list.Add(bufferPtr);
}
vertexAttributeBufferPtrs = list.ToArray();
}
// init index buffer
OneIndexBufferPtr indexBufferPtr;
{
using (var buffer = new OneIndexBuffer(IndexElementType.UInt,
DrawMode.Points, // any mode is OK as we'll update it later in other place.
BufferUsage.DynamicDraw))
{
buffer.Create(positionBufferPtr.ByteLength / (positionBufferPtr.DataSize * positionBufferPtr.DataTypeByteLength));
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
this.maxElementCount = indexBufferPtr.ElementCount;
indexBufferPtr.ElementCount = 0;// 高亮0个图元
// RULE: Renderer takes uint.MaxValue, ushort.MaxValue or byte.MaxValue as PrimitiveRestartIndex. So take care this rule when designing a model's index buffer.
GLSwitch glSwitch = new PrimitiveRestartSwitch(indexBufferPtr);
this.switchList.Add(glSwitch);
}
// init VAO.
var vertexArrayObject = new VertexArrayObject(indexBufferPtr, vertexAttributeBufferPtrs);
vertexArrayObject.Initialize(program);
// sets fields.
this.Program = program;
this.vertexAttributeBufferPtrs = vertexAttributeBufferPtrs;
this.indexBufferPtr = indexBufferPtr;
this.vertexArrayObject = vertexArrayObject;
this.positionBufferPtr = positionBufferPtr;
}
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
if (model.positions.Length < byte.MaxValue)
{
using (var buffer = new OneIndexBuffer <byte>(DrawMode.TriangleStrip, BufferUsage.StaticDraw))
{
buffer.Alloc(model.indexes.Length);
unsafe
{
var indexArray = (byte *)buffer.Header.ToPointer();
for (int i = 0; i < model.indexes.Length; i++)
{
if (model.indexes[i] == uint.MaxValue)
{
indexArray[i] = byte.MaxValue;
}
else
{
indexArray[i] = (byte)model.indexes[i];
}
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
else if (model.positions.Length < ushort.MaxValue)
{
using (var buffer = new OneIndexBuffer <ushort>(DrawMode.TriangleStrip, BufferUsage.StaticDraw))
{
buffer.Alloc(model.indexes.Length);
unsafe
{
var indexArray = (ushort *)buffer.Header.ToPointer();
for (int i = 0; i < model.indexes.Length; i++)
{
if (model.indexes[i] == uint.MaxValue)
{
indexArray[i] = ushort.MaxValue;
}
else
{
indexArray[i] = (ushort)model.indexes[i];
}
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
else
{
using (var buffer = new OneIndexBuffer <uint>(DrawMode.TriangleStrip, BufferUsage.StaticDraw))
{
buffer.Alloc(model.indexes.Length);
unsafe
{
var indexArray = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < model.indexes.Length; i++)
{
indexArray[i] = model.indexes[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as IndexBufferPtr;
}
}
}
return(indexBufferPtr);
}