streamlines.c File Reference

Handle the drawing of streamlines. More...

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

Defines
#define	lineDDA_gatherRGB(x0, y0, xEnd, yEnd, color, dst, dst_w, dst_h, r, g, b)
#define	_f1_x(rank, ret_color)
#define	_f2_x(rank, dir_flag, ret_color)
#define	TEST_NEIGHBORHOOD(testpos, testdist, retval)
#define	SLTEX_BLUR_MACRO
#define	TRIANGLE_GLYPH(s_pos, e_pos, scale)
Functions
void	draw_single_streamline (uint32_t *dst, int dst_w, int dst_h, vec4f *dir_data, float line_width, float *seed_point, uint32_t line_color)
	Draw single streamline. No additional logic, just a simple streamline evaluator and plotter.
void	draw_streamlines_gridseed (uint32_t *dst, int dst_w, int dst_h, vec4f *dir_data, float line_width, float linecnt_x, float linecnt_y, uint32_t line_color)
	Draw streamlines (grid). Draw streamlines with seepoints placed on grid.
void	draw_single_streamline_evenly_spaced (uint32_t *dst, int dst_w, int dst_h, vec4f *dir_data, float line_width, float *seed_point, uint32_t line_color, sl_t *samplepoints)
	Draw single streamline. More elaborated streamline plotter (e.g. stores samplepoints) - used for evenly spaced streamlines.
void	draw_streamlines_evenly_spaced (uint32_t *dst, int dst_w, int dst_h, vec4f *dir_data, float line_width, float dsep, float dtest, uint32_t line_color)
	Draw streamlines (evenly spaced).
void	dirblur_tex (uint32_t *srcin, uint32_t *dst, int dst_w, int dst_h, vec4f *dir_data, float blur_amount)
Variables
sl_t **	dsep_grid
sl_t *	samplepoints
sl_t *	tmp_samplepoints
int	max_len
int	max_seedpoints
int	dsep_w
int	dsep_h
int	dsepdsep
float	nearest

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Detailed Description

Handle the drawing of streamlines.

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Function Documentation

void draw_single_streamline (  uint32_t *  dst, int  dst_w, int  dst_h, vec4f *  dir_data, float  line_width, float *  seed_point, uint32_t  line_color )

Draw single streamline. No additional logic, just a simple streamline evaluator and plotter. Parameters: dst  Pointer to the blit-destination dst_w  The blit-destination's width dst_h  The blit-destination's height dir_data  Pointer to the velocity-vectors of the flow-field line_width  Streamline width seed_point  Pointer to seedpoint for this streamline line_color  Streamline color

void draw_single_streamline_evenly_spaced (  uint32_t *  dst, int  dst_w, int  dst_h, vec4f *  dir_data, float  line_width, float *  seed_point, uint32_t  line_color, sl_t *  samplepoints )

Draw single streamline. More elaborated streamline plotter (e.g. stores samplepoints) - used for evenly spaced streamlines. Parameters: dst  Pointer to the blit-destination dst_w  The blit-destination's width dst_h  The blit-destination's height dir_data  Pointer to the velocity-vectors of the flow-field line_width  Streamline width seed_point  Pointer to seedpoint for this streamline line_color  Streamline color samplepoints  Pointer to memory-area which is to store the samplepoints of this streamline

void draw_streamlines_evenly_spaced (  uint32_t *  dst, int  dst_w, int  dst_h, vec4f *  dir_data, float  line_width, float  dsep, float  dtest, uint32_t  line_color )

Draw streamlines (evenly spaced). Parameters: dst  Pointer to the blit-destination dst_w  The blit-destination's width dst_h  The blit-destination's height dir_data  Pointer to the velocity-vectors of the flow-field line_width  Streamline width dsep  Distance of new seedpoints to the streamline that spawned this new seedpoint dtest  Minimal distance to existing samplepoints at which further evaluation of current streamline ends line_color  Streamline color

void draw_streamlines_gridseed (  uint32_t *  dst, int  dst_w, int  dst_h, vec4f *  dir_data, float  line_width, float  linecnt_x, float  linecnt_y, uint32_t  line_color )

Draw streamlines (grid). Draw streamlines with seepoints placed on grid. Parameters: dst  Pointer to the blit-destination dst_w  The blit-destination's width dst_h  The blit-destination's height dir_data  Pointer to the velocity-vectors of the flow-field line_width  Streamline width linecnt_x  Number of streamlines per row linecnt_y  Number of streamlines per column line_color  Streamline color

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