Introduction

GridPro 2D is an add-on for Tecplot for 2D multi-block quadrilateral grid generation. There are 3 general steps to creating grids using GridPro: Geometry, Topology, and Grid.

Geometry consists surfaces around which you want to create the grid. In this version geometry can be either basic shapes: ellipses, circles, lines (which may be used to form boxes), and poly-lines, or geometry can be imported from a linear file defining a surface with a two dimensional series of points.

Topology consists of a framework which is used to tell GridPro the structure of the grid that should be generated. It defines the block structure of the grid, and how the grid should conform to geometry. Once a topology is created, it can be used for multiple geometries of the same structure, for example generating grids for multiple variations or positions of an airfoil.

Topology must be aware of geometry as well. Every Piece of geometry that is part of a grid must have corners assigned to it, to tell GridPro how the topology should conform to the geometry.

Grid generation is the final step. Once geometry and topology are acceptably defined, grid generation is a totally automated process. While a grid can be generated if a topology is valid, as there are some topologies which will result in generation of a poor grid because of the structure with which it was created. These topologies will be explained later, so that they can be avoided.

Interface

		Load Surface From File
	Loads a surface into Tecplot from a file containing a linear series of points. See this document for format information.
		Surface Properties
	View/adjust surface properties for selected surface. This lets you adjust the number of sides of a surface, and apply clustering on surface.
		Split Rectangle
	Splits the selected Tecplot rectangle geometry into 4 line segments, so that it can be used by GridPro.
		Delete Surface
	Deletes the currently selected surface along with references to it, such as corner assignments, to avoid inconsistencies.
		Place Corner (Toggle)
	Places topology corners where you click while active.
		Link corners (Toggle)
	Links topology corners that are clicked while active.

	Insert Corner (Toggle)
Inserts corners into links where they are clicked while active.
	Assign Corners to Surface (Toggle)
Assigns corners that are clicked to the selected surface while active. The selected surface is highlighted in green, and assigned corners are highligted with black boxes.
	Redraw Links
Redraws the links on the screen. Links are represented by line segments, which can be accidentally moved or deleted, this will redraw them if that occurs.
	Remove Corner Assignments (Toggle)
Remove corners that are clicked from the selected surface. The selected surface is highlighted in green, and assigned corners are highlighted with black boxes.
	Delete Corners (Toggle)
Delete corners that are clicked while active.
	Move Corners (Toggle)
Moves corners while active. Click on a corner to move, and click again to pick a new location.
	Delete Links (Toggle)
Deletes links that are clicked while active.
	Link Properties
View link properties for the currently selected link. This lets you adjust grid density along specific links, as well as adjust global default link density.
	Open TIL
Load topology and geometry from a TIL (Topology input language) file.
	Save TIL
Save topology and geometry to a TIL (Topology input language) file.
	Generate Grid
Generates a grid based on the current topology. This will first prompt you to save the file as a TIL, then launch ggrid.exe for the topology that was saved. When ggrid.exe finishes, the grid may be loaded using the Refresh Grid button.
	Refresh Grid
Refreshes the currently loaded grid. After Grid generation is complete, the most recently generated grid can be loaded using this button as well.
	Load Grid
Loads a GridPro grid file. By default generated grids are saved as "blk.tmp" in the current working directory.
	Disable Grid
Disables the currently loaded grid, to allow modification of topology and geometry. The grid can be re-enabled by using the Refresh Grid button.