public DX11VertexGeometry LineStrip3d(List <Vector3> points, bool loop)
{
DX11VertexGeometry geom = new DX11VertexGeometry(context);
int vcount = loop ? points.Count + 1 : points.Count;
Pos3Tex2Vertex[] verts = new Pos3Tex2Vertex[vcount];
float inc = loop ? 1.0f / (float)vcount : 1.0f / ((float)vcount + 1.0f);
float curr = 0.0f;
for (int i = 0; i < points.Count; i++)
{
verts[i].Position = points[i];
verts[i].TexCoords.X = curr;
curr += inc;
}
if (loop)
{
verts[points.Count].Position = points[0];
verts[points.Count].TexCoords.X = 1.0f;
}
DataStream ds = new DataStream(vcount * Pos3Tex2Vertex.VertexSize, true, true);
ds.Position = 0;
ds.WriteRange(verts);
ds.Position = 0;
var vbuffer = new SlimDX.Direct3D11.Buffer(context.Device, ds, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = (int)ds.Length,
Usage = ResourceUsage.Default
});
ds.Dispose();
geom.VertexBuffer = vbuffer;
geom.InputLayout = Pos3Tex2Vertex.Layout;
geom.Topology = PrimitiveTopology.LineStrip;
geom.VerticesCount = vcount;
geom.VertexSize = Pos3Tex2Vertex.VertexSize;
geom.HasBoundingBox = false;
return(geom);
}
public DX11VertexGeometry LineStrip3d(List<Vector3> points, bool loop)
{
DX11VertexGeometry geom = new DX11VertexGeometry(context);
int vcount = loop ? points.Count + 1 : points.Count;
Pos3Tex2Vertex[] verts = new Pos3Tex2Vertex[vcount];
float inc = loop ? 1.0f / (float)vcount : 1.0f / ((float)vcount + 1.0f);
float curr = 0.0f;
for (int i = 0; i < points.Count; i++)
{
verts[i].Position = points[i];
verts[i].TexCoords.X = curr;
curr += inc;
}
if (loop)
{
verts[points.Count].Position = points[0];
verts[points.Count].TexCoords.X = 1.0f;
}
DataStream ds = new DataStream(vcount * Pos3Tex2Vertex.VertexSize, true, true);
ds.Position = 0;
ds.WriteRange(verts);
ds.Position = 0;
var vbuffer = new SlimDX.Direct3D11.Buffer(context.Device, ds, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = (int)ds.Length,
Usage = ResourceUsage.Default
});
ds.Dispose();
geom.VertexBuffer = vbuffer;
geom.InputLayout = Pos3Tex2Vertex.Layout;
geom.Topology = PrimitiveTopology.LineStrip;
geom.VerticesCount = vcount;
geom.VertexSize = Pos3Tex2Vertex.VertexSize;
geom.HasBoundingBox = false;
return geom;
}
public DX11VertexGeometry LineStrip3d(List <Vector3> points, bool loop, bool buildAdjacency = false)
{
if (points.Count == 0)
{
//Build zero line
points = new List <Vector3>(2);
points.Add(Vector3.Zero);
points.Add(Vector3.Zero);
}
else if (points.Count == 1)
{
var oldPoints = points;
//Build zero line using current vertex
points = new List <Vector3>(2);
points.Add(oldPoints[0]);
points.Add(oldPoints[0]);
}
DX11VertexGeometry geom = new DX11VertexGeometry(context);
//Line has N vertex count, we add 1 in case of loop to close, and we add 2 more in case of adjacency
int lineVertexCount = loop ? points.Count + 1 : points.Count;
int totalVertexCount = buildAdjacency ? lineVertexCount + 2 : lineVertexCount;
int startWriteIndex = buildAdjacency ? 1 : 0;
Pos3Tex2Vertex[] verts = new Pos3Tex2Vertex[totalVertexCount];
float uvStep = loop ? 1.0f / (float)totalVertexCount : 1.0f / ((float)totalVertexCount + 1.0f);
float currentUv = 0.0f;
for (int i = 0; i < points.Count; i++)
{
verts[startWriteIndex + i].Position = points[i];
verts[startWriteIndex + i].TexCoords.X = currentUv;
currentUv += uvStep;
}
//Add first point to close the loop
if (loop)
{
verts[startWriteIndex + points.Count].Position = points[0];
verts[startWriteIndex + points.Count].TexCoords.X = 1.0f;
}
if (buildAdjacency)
{
if (loop)
{
//Add last point from the line as first vertex
verts[0] = verts[lineVertexCount - 1];
//Add second point as loop = last point
verts[0] = verts[1];
}
else
{
//In that case, we just extend the lines from beginning and end, first point we reverse that dir
Vector3 originDir = points[1] - points[0];
verts[0].Position = points[0] - originDir;
verts[0].TexCoords = new Vector2(0.0f, 0.0f);
//Last point to previous
Vector3 destDir = points[points.Count - 1] - points[points.Count - 2];
verts[verts.Length - 1].Position = points[points.Count - 1] + destDir;
verts[verts.Length - 1].TexCoords = new Vector2(1.0f, 0.0f);
}
}
DataStream ds = new DataStream(totalVertexCount * Pos3Tex2Vertex.VertexSize, true, true);
ds.Position = 0;
ds.WriteRange(verts);
ds.Position = 0;
var vbuffer = new SlimDX.Direct3D11.Buffer(context.Device, ds, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = (int)ds.Length,
Usage = ResourceUsage.Default
});
ds.Dispose();
geom.VertexBuffer = vbuffer;
geom.InputLayout = Pos3Tex2Vertex.Layout;
geom.Topology = buildAdjacency ? PrimitiveTopology.LineStripWithAdjacency : PrimitiveTopology.LineStrip;
geom.VerticesCount = totalVertexCount;
geom.VertexSize = Pos3Tex2Vertex.VertexSize;
geom.HasBoundingBox = false;
return(geom);
}
