TTF Class

TTF = class(TGUISprite);

File

volumeData

Description

TTransferFunctions = class ds:TDataSet; histval:array[0..3]of array of cardinal;//values from the histogram xpos,pxpos:integer; scale:array[0..3]of single;

iw,ih:integer; //dimensions of the target image mdx,mdy:integer; //mouse down coordinates

TransFunc:array[0..3] of array of TTransferNode;//nodes of the transfer function TransFuncPoints:array[0..3]of integer;//number of nodes in the transfer function SquareSize:integer; //size of the rectangle drawn around a node

CURRENT:integer;

constructor Create(d:TDataSet; w,h:integer); destructor Destroy;override; procedure Histogram(w:integer); procedure DrawHistogram(c:TCanvas; w,h:integer; zoom:integer); procedure DrawSlider(c:TCanvas; w,h:integer); procedure MoveSlider(x:integer); procedure DrawTransferFunction(c:TCanvas; w,h:integer; zoom:integer); procedure AddTransferPoint(x,y,w,h:integer; c:TColor); procedure MouseDown(x,y:integer); procedure MouseUp(x,y:integer); function PointInSquare(px,py,sx,sy:integer):boolean; procedure SaveToTexture(n:integer); function GetTransfer(p:single;n:integer):TVector4f; function ColorToRGB(c:TColor):TVector3f; function GetInfo(x,y:integer; var n:TTransferNode):integer; procedure SetInfo(n:TTransferNode; i:integer); procedure RemoveNode(i:integer); end;

Fields

Field	Description
Anim	Access to the TAnimation structure.
ColorDialog	Access to the TColordialog component
datatype	Type of attribute that is handled by this transfer function - direction, speed,...
datatypechr	unused
dragging	Number of node, that is being dragged. Default = -1.
ds	Access to the TDataSet structure.
flow	Access to the TFlow structure.
globalhist	Texture data of the global histogram texture.
globalhistogram	True if the global histogram (all timesteps in one) is shown.
globaltex	Pointer to the texture of the global histogram
histogrammesh	Pointer to the mesh of transfer node
histtex	Texture data of histogram textures for all time steps
histval	Histogram values for single time steps.
histvalglobal	Histogram values for the global historagm
htex	Histogram texture pointers for all the time steps.
nodemesh	Pointer to the mesh of transfer node
nodemesh2	Pointer to the mesh of transfer node
selected	Number of node, that is selected. Default = -1.
showhistogram	If false, only the transfer functino is drawn.
TransferPoints	Number of transfer points.
TransFunc	Array of instances of the TTransferNode class.

Namespace

VolumeData Namespace

Methods

Method	Description
ColorToRGB	Transforms TColor value to a 3d vector of <0..1>
Create	Constructor, creates default transfer functions.
DeleteHistogram	Deletes texture, when switched to another TTF instance.
DeleteNode	Deletes selected transfer node.
Destroy	Destructor. Frees memory.
EnumeratePoint	Determines color of a point form <0..1>
ExistsHistogram	Checks if a swapped histogram texture from previous usage of the dataset exists.
ExportToFile	Saves data for creation of the histogram texture for one time step.
GenGlobalHistogram	If no data swapped, this generates the global histogram texture data.
Histogram	If no data swapped, this generates the histogram texture data for one tiome step.
Init	Initializes the histogram and transfer node meshes (display lists)
LoadFromFile	Loads a lit of transfer nodes form a file
LoadHistogram	Creates histogram textures for all time steps and global histogram from a swapped file.
onGUIDraw	Draw routine called one per frame.
onMouseUp	MouseUp handler
onSelect	Checks if there is a transfer node under the mouse pointer
onSelectDraw	Used by onSelect. It draw one node for onSelect.
Reset	Resets the transfer function to it default.
SaveHistogram	Saves data to be swapped to HDD.
SaveToFile	Saves the array of transfer nodes to a file
SetVisibile	Makes the transfer function visible and loads the textures to graphical memory.
SortPoints	Sorts the transfer nodes by their position
TPSelected	Determines, if the mouse clicked into the transfer node i.
unSelect	makes no node selected

Legend

	Data Member
	Method
	virtual

Links

Fields, volumeData, VolumeData Namespace, Legend, Members, Methods

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