/// <summary>Calculate fill in shape by using triangulation.</summary>
/// <param name="_WindingOrder">Winding order of the shape used for triangulating.</param>
private void CalculateFillInShape(Triangulator.WindingOrder _WindingOrder)
{
// Validate.
if (m_VectorList.Count <= 2)
{
return;
}
// Create a list of vertices.
Vector2[] vSourceVertices = new Vector2[m_VectorList.Count];
for (int i = m_VectorList.Count - 1; i >= 0; --i)
{
vSourceVertices[i] = m_VectorList[i];
}
// Create a list of indices.
int[] nSourceIndices;
// Triangulate vertices and indices.
Triangulator.Triangulator.Triangulate(vSourceVertices,
_WindingOrder,
out vSourceVertices,
out nSourceIndices);
// Store number of vertices and primitives for rendering.
m_nVertices = vSourceVertices.Length;
m_nPrimitives = nSourceIndices.Length / 3;
// Create and setup the list of vertex data.
VertexPositionColor[] verts = new VertexPositionColor[vSourceVertices.Length];
for (int i = vSourceVertices.Length - 1; i >= 0; --i)
{
verts[i] = new VertexPositionColor(m_GraphicsDevice.Viewport.Unproject(new Vector3(vSourceVertices[i], 0f),
m_Projection,
m_View,
Matrix.Identity), m_FillInColor);
}
// Clean up old data.
if (m_VertexBuffer != null)
{
m_VertexBuffer.Dispose();
m_VertexBuffer = null;
}
if (m_IndexBuffer != null)
{
m_IndexBuffer.Dispose();
m_IndexBuffer = null;
}
// Create vertex buffer.
m_VertexBuffer = new VertexBuffer(m_GraphicsDevice,
VertexPositionColor.VertexDeclaration,
verts.Length * VertexPositionColor.VertexDeclaration.VertexStride,
BufferUsage.WriteOnly);
m_VertexBuffer.SetData(verts);
// Branch here to convert our indices to shorts if possible for wider GPU support.
if (verts.Length < UInt16.MaxValue /*65535*/)
{
// Create a list of indices.
short[] sIndices = new short[nSourceIndices.Length];
for (int i = nSourceIndices.Length - 1; i >= 0; --i)
{
sIndices[i] = (short)nSourceIndices[i];
}
// Create index buffer.
m_IndexBuffer = new IndexBuffer(m_GraphicsDevice,
IndexElementSize.SixteenBits,
sIndices.Length * sizeof(short),
BufferUsage.WriteOnly);
m_IndexBuffer.SetData(sIndices);
}
else
{
// Create index buffer.
m_IndexBuffer = new IndexBuffer(m_GraphicsDevice,
IndexElementSize.ThirtyTwoBits,
nSourceIndices.Length * sizeof(int),
BufferUsage.WriteOnly);
m_IndexBuffer.SetData(nSourceIndices);
}
}
/// <summary>Calculate outline shape by using textured quad.</summary>
/// <param name="_WindingOrder">Winding order of the shape used for triangulating.</param>
private void CalculateOutlineShape(Triangulator.WindingOrder _WindingOrder)
{
// Validate.
if (m_VectorList.Count < 2)
{
return;
}
// Sharpness determines the line quality by offsetting pixels.
Vector2 vOffsetSharpness = Vector2.Zero;
switch (m_Antialiasing)
{
case Antialiasing.Disabled: vOffsetSharpness = new Vector2(3f, 3f); break;
case Antialiasing.Enabled: vOffsetSharpness = new Vector2(1f, 1f); break;
default: break;
}
// Create a list of vertices.
Vector2[] vSourceVertices = new Vector2[4];
vSourceVertices[0] = Vector2.Zero;
vSourceVertices[1] = new Vector2(0f, m_PixelTexture.Height);
vSourceVertices[2] = new Vector2(m_PixelTexture.Width, m_PixelTexture.Height);
vSourceVertices[3] = new Vector2(m_PixelTexture.Width, 0f);
// Create a list of indices.
int[] nSourceIndices;
// Triangulate vertices and indices.
Triangulator.Triangulator.Triangulate(vSourceVertices,
_WindingOrder,
out vSourceVertices,
out nSourceIndices);
// Store number of vertices and primitives for rendering.
m_nVertices = vSourceVertices.Length;
m_nPrimitives = nSourceIndices.Length / 3;
// Create and setup the list of vertex data.
VertexPositionColorTexture[] verts = new VertexPositionColorTexture[vSourceVertices.Length];
for (int i = vSourceVertices.Length - 1; i >= 0; --i)
{
verts[i] = new VertexPositionColorTexture(m_GraphicsDevice.Viewport.Unproject(new Vector3(vSourceVertices[i], 0f),
m_Projection,
m_View,
Matrix.Identity),
m_FillInColor,
new Vector2(vSourceVertices[i].X / (m_PixelTexture.Width - vOffsetSharpness.X),
vSourceVertices[i].Y / (m_PixelTexture.Height - vOffsetSharpness.Y)));
}
// Clean up old data.
if (m_VertexBuffer != null)
{
m_VertexBuffer.Dispose();
m_VertexBuffer = null;
}
if (m_IndexBuffer != null)
{
m_IndexBuffer.Dispose();
m_IndexBuffer = null;
}
// Create vertex buffer.
m_VertexBuffer = new VertexBuffer(m_GraphicsDevice,
VertexPositionColorTexture.VertexDeclaration,
verts.Length * VertexPositionColorTexture.VertexDeclaration.VertexStride,
BufferUsage.WriteOnly);
m_VertexBuffer.SetData(verts);
// Branch here to convert our indices to shorts if possible for wider GPU support.
if (verts.Length < UInt16.MaxValue /*65535*/)
{
// Create a list of indices.
short[] sIndices = new short[nSourceIndices.Length];
for (int i = nSourceIndices.Length - 1; i >= 0; --i)
{
sIndices[i] = (short)nSourceIndices[i];
}
// Create index buffer.
m_IndexBuffer = new IndexBuffer(m_GraphicsDevice,
IndexElementSize.SixteenBits,
sIndices.Length * sizeof(short),
BufferUsage.WriteOnly);
m_IndexBuffer.SetData(sIndices);
}
else
{
// Create index buffer.
m_IndexBuffer = new IndexBuffer(m_GraphicsDevice,
IndexElementSize.ThirtyTwoBits,
nSourceIndices.Length * sizeof(int),
BufferUsage.WriteOnly);
m_IndexBuffer.SetData(nSourceIndices);
}
}
