tfunc.c File Reference

Deal with transfer-function-related exercises. More...

#include <stdlib.h>
#include "rendermodes.h"

Defines
#define	TF_BG_COLOR
#define	TF_HISTO_COLOR
Functions
void	opacity_reinterpol_tf (opacity_node *curr)
	Reinterpolate opacities.
void	new_opacitynode_tf (uint16_t scx, uint16_t scy)
	Generate new opacity-node.
void	del_opacitynode_tf (uint16_t scx, uint16_t scy)
	Delete opacity-node.
void	color_reinterpol_tf (color_node *curr)
	Reinterpolate colors.
void	free_nodes_tf_inside (void)
	Free opacity- and color-nodes.
void	free_nodes_tf (void)
	Free opacity- and color-nodes.
void	new_colornode_tf (uint16_t scx)
	Generate new color-node.
void	del_colornode_tf (uint16_t scx, uint16_t scy)
	Delete color-node.
void	resize_tf (void)
	Resize the image which is drawn to represent the transfer-function.
void	init_tf (void)
	Calculate the image which is drawn to represent the transfer-function. The initial outermost color- and opacity-nodes are set, too.
void	draw_tf (void)
	Draw the transfer-function.
Variables
int	vol_loaded
int	last_inserted_cnode
int	colorband_h

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Detailed Description

Deal with transfer-function-related exercises.

All operations that relate to the rendering and updating of the transferfunction happen here.

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Function Documentation

void color_reinterpol_tf (  color_node *  curr  )

Reinterpolate colors. This function is called, whenever the user moves a color-node. Parameters: curr  Pointer to the current color node.

void del_colornode_tf (  uint16_t  scx, uint16_t  scy )

Delete color-node. This function is called, whenever the user right-clicks on a color-node. Parameters: scx  The x-coordinate in screen-space of the color-node. scy  The y-coordinate in screen-space of the color-node.

void del_opacitynode_tf (  uint16_t  scx, uint16_t  scy )

Delete opacity-node. This function is called, whenever the user right-clicks on an opacity-node. Parameters: scx  The x-coordinate in screen-space of the opacity-node. scy  The y-coordinate in screen-space of the opacity-node.

void draw_tf (  void   )

Draw the transfer-function. The previously calculated/generated image which represents the transfer-function is blit to the screen.

void free_nodes_tf_inside (  void   )

Free opacity- and color-nodes. Does not delete the two outermost color- and opacity-nodes, respectively.

void new_colornode_tf (  uint16_t  scx  )

Generate new color-node. This function is called, whenever the user double-clicks in the "colors-area" of the transfer-function. Parameters: scx  The x-coordinate in screen-space of the new color-node.

void new_opacitynode_tf (  uint16_t  scx, uint16_t  scy )

Generate new opacity-node. This function is called, whenever the user double-clicks in the "opacity-area" of the transfer-function. Parameters: scx  The x-coordinate in screen-space of the new opacity-node. scy  The y-coordinate in screen-space of the new opacity-node.

void opacity_reinterpol_tf (  opacity_node *  curr  )

Reinterpolate opacities. This function is called, whenever the user moves an opacity-node. Parameters: curr  Pointer to the current opacity node.

void resize_tf (  void   )

Resize the image which is drawn to represent the transfer-function. This function is called, whenever the user changes the size of the SDL-window.

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