private void ResetGrid()
{
if (vertexBuffer != null)
{
vertexBuffer.Dispose();
}
vertexBuffer = new ExpandableVertexBuffer <ColorVertex>(device, PrimitiveType.LineList, Usage.None,
VertexFormat.None, Pool.Managed);
int iX = viewport.X % columnSpan;
int iY = viewport.Y % rowSpan;
int fX = viewport.Width;
int fY = viewport.Height;
int numOfColumns = viewport.Width / columnSpan;
int numOfRows = viewport.Height / rowSpan;
var colVertices = new List <ColorVertex>(numOfColumns * 2);
var rowVertices = new List <ColorVertex>(numOfRows * 2);
int opacity = 255 - Transparency;
for (int i = iX; i < fX; i += columnSpan)
{
var v0 = new ColorVertex();
var v1 = new ColorVertex();
v0.Position = new Vector4(i, 0, RenderingZOffset, 1.0f);
v0.Color = Color.FromArgb(opacity, color).ToArgb();
v1.Position = new Vector4(i, viewport.Height, RenderingZOffset, 1.0f);
v1.Color = Color.FromArgb(opacity, color).ToArgb();
colVertices.Add(v0);
colVertices.Add(v1);
}
for (int i = iY; i < fY; i += rowSpan)
{
var v0 = new ColorVertex();
var v1 = new ColorVertex();
v0.Position = new Vector4(0, i, RenderingZOffset, 1.0f);
v0.Color = Color.FromArgb(opacity, color).ToArgb();
v1.Position = new Vector4(viewport.Width, i, RenderingZOffset, 1.0f);
v1.Color = Color.FromArgb(opacity, color).ToArgb();
rowVertices.Add(v0);
rowVertices.Add(v1);
}
vertexBuffer.AddVertices(colVertices);
vertexBuffer.AddVertices(rowVertices);
}
public static T[] ColorVertex <T>(Vector3[] positions) where T : struct
{
Vector4[] colors = GetColorsForBook();
//Vector2[] textureCoord = GetTextureCoord();
ColorVertex[] vertices = new ColorVertex[positions.Length];
//from this array, make coresponding structure
for (int i = 0; i < positions.Length; i++)
{
ColorVertex a = new ColorVertex();
a.Position = positions[i];
a.Color = colors[i];
vertices[i] = a;
}
var y = (T[])Convert.ChangeType(vertices, typeof(T[]));
return(y);
}
public void Render()
{
if (IPoint == FPoint)
{
return;
}
// 1. Construct the four vertices of the selection box.
////
int x = IPoint.X;
int y = IPoint.Y;
int width = FPoint.X - IPoint.X;
int height = FPoint.Y - IPoint.Y;
var tLeft = new ColorVertex(new Vector4(x, y, RenderingZOffset, 1.0f), color);
var bLeft = new ColorVertex(new Vector4(x, y + height, RenderingZOffset, 1.0f), color);
var tRight = new ColorVertex(new Vector4(x + width, y, RenderingZOffset, 1.0f), color);
var bRight = new ColorVertex(new Vector4(FPoint.X, FPoint.Y, RenderingZOffset, 1.0f), color);
var points = new[] { tLeft, bLeft, tRight, bRight };
// 2. Fill buffer.
////
DataStream vstream = vertexBuffer.Lock(0, 0, LockFlags.Discard);
vstream.WriteRange(points);
vertexBuffer.Unlock();
// 3. Set states and draw!
////
device.SetTexture(0, null);
device.VertexDeclaration = vertexDecl;
device.Indices = indexBuffer;
device.SetStreamSource(0, vertexBuffer, 0, 20);
device.DrawIndexedPrimitives(PrimitiveType.LineList, 0, 0, NumOfVertices, 0, 4);
}
