/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint Search(PickingEventArgs arg, uint lastVertexId, ZeroIndexPicker picker)
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 4, DrawMode.Points, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
array[3] = lastVertexId - 3;
buffer.UnmapBuffer();
}
picker.Renderer.Render4InnerPicking(arg, buffer);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (lastVertexId - 3 <= 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Point
/// </summary>
/// <param name="arg">渲染参数</param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</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
OneIndexBuffer buffer = Buffer.Create(IndexBufferElementType.UInt, 3, DrawMode.Points, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
buffer.UnmapBuffer();
}
// 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, buffer);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadStageVertexId(x, y);
buffer.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!");
}
}
public IndexBuffer GetIndexBuffer()
{
if (this.indexBuffer == null)
{
int polygon = (this.mesh.faces[0] is ObjVNFTriangle) ? 3 : 4;
DrawMode mode = (this.mesh.faces[0] is ObjVNFTriangle) ? DrawMode.Triangles : DrawMode.Quads;
OneIndexBuffer indexBuffer = OneIndexBuffer.Create(IndexBufferElementType.UInt, polygon * this.mesh.faces.Length, mode, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)indexBuffer.MapBuffer(MapBufferAccess.WriteOnly);
int index = 0;
foreach (var face in this.mesh.faces)
{
foreach (var vertexIndex in face.VertexIndexes())
{
array[index++] = vertexIndex;
}
}
indexBuffer.UnmapBuffer();
}
this.indexBuffer = indexBuffer;
}
return(this.indexBuffer);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="modernRenderer"></param>
/// <returns></returns>
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 3, DrawMode.Points, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 0;
buffer.UnmapBuffer();
}
modernRenderer.Render4InnerPicking(arg, buffer);
uint id = ColorCodedPicking.ReadStageVertexId(x, y);
buffer.Dispose();
if (0 == id || lastVertexId - 1 == id || lastVertexId - 0 == id)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
uint lastVertexId, ZeroIndexPicker picker)
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = 0; array[1] = lastVertexId - 1;
array[2] = lastVertexId - 1; array[3] = lastVertexId - 0;
array[4] = lastVertexId - 0; array[5] = 0;
buffer.UnmapBuffer();
}
picker.Renderer.Render4InnerPicking(arg, buffer);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (id + 1 == lastVertexId)
{
return(new uint[] { 0, lastVertexId - 1, });
}
else if (id == lastVertexId)
{
return(new uint[] { lastVertexId - 1, lastVertexId - 0, });
}
else if (id == 0)
{
return(new uint[] { lastVertexId - 0, 0, });
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBuffer GetIndexBuffer()
{
if (this.indexBuffer == null)
{
int length = TetrahedronModel.index.Length;
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UByte, length, DrawMode.Triangles, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (byte *)pointer;
for (int i = 0; i < TetrahedronModel.index.Length; i++)
{
array[i] = TetrahedronModel.index[i];
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
return(this.indexBuffer);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="modernRenderer"></param>
/// <returns></returns>
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBuffer buffer = Buffer.Create(IndexBufferElementType.UInt, 8, DrawMode.Lines, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
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;
buffer.UnmapBuffer();
}
modernRenderer.Render4InnerPicking(arg, buffer);
uint id = ColorCodedPicking.ReadStageVertexId(x, y);
buffer.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!");
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBuffer GetIndexBuffer()
{
if (indexBuffer == null)
{
ushort[] faces = model.GetFaces();
int length = faces.Length;
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UShort, length, DrawMode.Triangles, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (ushort *)pointer;
for (int i = 0; i < faces.Length; i++)
{
array[i] = (ushort)(faces[i] - 1);
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
return(indexBuffer);
}
public IndexBuffer GetIndexBuffer()
{
if (this.indexBuffer == null)
{
int uCount = GetUCount(interval);
int vCount = GetVCount(interval);
int length = (uCount + 1) * vCount + (vCount + 1 + 1) * uCount;
OneIndexBuffer buffer = CSharpGL.GLBuffer.Create(IndexBufferElementType.UInt, length, DrawMode.LineStrip, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (uint *)pointer;
int index = 0;
// vertical lines.
for (int i = 0; i < vCount; i++)
{
for (int j = 0; j < uCount; j++)
{
array[index++] = (uint)(i + j * vCount);
}
array[index++] = uint.MaxValue;// primitive restart index.
}
// horizontal lines.
for (int i = 0; i < uCount; i++)
{
for (int j = 0; j < vCount; j++)
{
array[index++] = (uint)(j + i * vCount);
}
array[index++] = (uint)(0 + i * vCount);
array[index++] = uint.MaxValue;// primitive restart index.
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
return(this.indexBuffer);
}
public IndexBuffer GetIndexBuffer()
{
if (this.indexBuffer == null)
{
Face[] faces = Teapot.faceData;
int length = faces.Length * 3;
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UShort, length, DrawMode.Triangles, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (ushort *)pointer;
for (int i = 0; i < faces.Length; i++)
{
array[i * 3 + 0] = (ushort)(faces[i].vertexId1 - 1);
array[i * 3 + 1] = (ushort)(faces[i].vertexId2 - 1);
array[i * 3 + 2] = (ushort)(faces[i].vertexId3 - 1);
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
return(this.indexBuffer);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBuffer GetIndexBuffer()
{
if (this.indexBuffer == null)
{
int length = model.indexes.Length;
if (model.positions.Length < byte.MaxValue)
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UByte, length, DrawMode.TriangleStrip, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (byte *)pointer;
for (int i = 0; i < model.indexes.Length; i++)
{
if (model.indexes[i] == uint.MaxValue)
{
array[i] = byte.MaxValue;
}
else
{
array[i] = (byte)model.indexes[i];
}
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
else if (model.positions.Length < ushort.MaxValue)
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UShort, length, DrawMode.TriangleStrip, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (ushort *)pointer;
for (int i = 0; i < model.indexes.Length; i++)
{
if (model.indexes[i] == uint.MaxValue)
{
array[i] = ushort.MaxValue;
}
else
{
array[i] = (ushort)model.indexes[i];
}
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
else
{
OneIndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, length, DrawMode.TriangleStrip, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (uint *)pointer;
for (int i = 0; i < model.indexes.Length; i++)
{
array[i] = model.indexes[i];
}
buffer.UnmapBuffer();
}
this.indexBuffer = buffer;
}
}
return(indexBuffer);
}
