// This returns a range of blocks in a frustum
public List <VisualBlockEntry> GetFrustumRange(ProjectedFrustum2D frustum)
{
// Make square range from frustum circle
// This will be the range in which we will test blocks
Point lt = GetBlockCoordinates(frustum.Center - frustum.Radius);
Point rb = GetBlockCoordinates(frustum.Center + frustum.Radius);
// Constants we need
float blockfrustumdistance2 = (frustum.Radius * frustum.Radius) + (BLOCK_RADIUS * BLOCK_RADIUS);
// Go through the range to make a list
int entriescount = (rb.X - lt.X) * (rb.Y - lt.Y);
List <VisualBlockEntry> entries = new List <VisualBlockEntry>(entriescount);
for (int x = lt.X; x <= rb.X; x++)
{
for (int y = lt.Y; y <= rb.Y; y++)
{
// First check if the block circle is intersecting the frustum circle
Point block = new Point(x, y);
Vector2D blockcenter = GetBlockCenter(block);
if (Vector2D.DistanceSq(frustum.Center, blockcenter) < blockfrustumdistance2)
{
// Add the block if the block circle is inside the frustum
if (frustum.IntersectCircle(blockcenter, BLOCK_RADIUS))
{
entries.Add(GetBlock(block));
}
}
}
}
// Return list
return(entries);
}
// Constructor
internal Renderer3D(D3DDevice graphics) : base(graphics)
{
// Initialize
CreateProjection();
CreateMatrices2D();
SetupThingCage();
SetupTextures();
renderthingcages = true;
showselection = true;
showhighlight = true;
// Dummy frustum
frustum = new ProjectedFrustum2D(new Vector2D(), 0.0f, 0.0f, PROJ_NEAR_PLANE,
General.Settings.ViewDistance, Angle2D.DegToRad(General.Settings.VisualFOV));
}
// This returns a range of blocks in a frustum
public List <VisualBlockEntry> GetFrustumRange(ProjectedFrustum2D frustum2D)
{
var frustum = new Frustum();
frustum.planes = new Plane[4]
{
new Plane(frustum2D.Lines[0]),
new Plane(frustum2D.Lines[1]),
new Plane(frustum2D.Lines[2]),
new Plane(frustum2D.Lines[3])
};
var result = new List <VisualBlockEntry>();
root.GetBlocks(frustum, ref result);
return(result);
}
// This creates matrices for a camera view
public void PositionAndLookAt(Vector3D pos, Vector3D lookat)
{
// Calculate delta vector
cameraposition = pos;
Vector3D delta = lookat - pos;
float anglexy = delta.GetAngleXY();
float anglez = delta.GetAngleZ();
// Create frustum
frustum = new ProjectedFrustum2D(pos, anglexy, anglez, PROJ_NEAR_PLANE,
General.Settings.ViewDistance, Angle2D.DegToRad(General.Settings.VisualFOV));
// Make the view matrix
view3d = Matrix.LookAtRH(D3DDevice.V3(pos), D3DDevice.V3(lookat), new Vector3(0f, 0f, 1f));
// Make the billboard matrix
billboard = Matrix.RotationZ(anglexy + Angle2D.PI);
}
