n_fluids.c File Reference

Fluid management functions , ported from https://www.youtube.com/watch?v=iKAVRgIrUOU&t=522s. More...

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <strings.h>
#include "nilorea/n_fluids.h"
#include "nilorea/n_common.h"
#include "nilorea/n_thread_pool.h"

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Macros
#define	N_FLUID_S_FIELD   2
	array number for s
#define	N_FLUID_U_FIELD   0
	array number for u
#define	N_FLUID_V_FIELD   1
	array number for v

Functions
int	destroy_n_fluid (N_FLUID **fluid)
	destroy a fluid structure
int	n_fluid_advectSmoke (N_FLUID *fluid)
	non threaded version of add smoke function
void *	n_fluid_advectSmoke_proc (void *ptr)
	ready to be threaded add smoke function
int	n_fluid_advectVel (N_FLUID *fluid)
	non threaded version of add velocities function
void *	n_fluid_advectVel_proc (void *ptr)
	ready to be threaded add velocities function
double	n_fluid_avgU (const N_FLUID *fluid, size_t i, size_t j)
	compute the average U value at a fluid position using it's surrounding
double	n_fluid_avgV (const N_FLUID *fluid, size_t i, size_t j)
	compute the average V value at a fluid position using it's surrounding
int	n_fluid_draw (N_FLUID *fluid)
	draw a N_FLUID on screen / targert bitmap
int	n_fluid_extrapolate (N_FLUID *fluid)
	non threaded extrapolation function
ALLEGRO_COLOR	n_fluid_getSciColor (const N_FLUID *fluid, double val, double minVal, double maxVal)
	get funky colors for the fluid
int	n_fluid_integrate (N_FLUID *fluid)
	non threaded version of integration function
void *	n_fluid_integrate_proc (void *ptr)
	ready to be threaded integration function
int	n_fluid_resetObstacles (N_FLUID *fluid)
	reset the obstacles set in a N_FLUID
double	n_fluid_sampleField (N_FLUID *fluid, double x, double y, uint32_t field)
	compute a sample value at a field position
int	n_fluid_setObstacle (N_FLUID *fluid, double x, double y, double vx, double vy, double r)
	set an obstacle in the fluid grid
int	n_fluid_setObstacleFromBitmap (N_FLUID *fluid, ALLEGRO_BITMAP *bitmap, double x, double y, double vx, double vy, double r)
	set an obstacle in the fluid grid from a bitmap mask
int	n_fluid_simulate (N_FLUID *fluid)
	non threaded version of N_FLUID global processing function
int	n_fluid_simulate_threaded (N_FLUID *fluid, THREAD_POOL *thread_pool)
	a threaded version of N_FLUID global processing function
int	n_fluid_solveIncompressibility (N_FLUID *fluid)
	non threaded version of incompressibility solving function
void *	n_fluid_solveIncompressibility_proc (void *ptr)
	ready to be threaded incompressibility solving function
void	n_memset (void *dst, const void *val, size_t size, size_t count)
	memset bytes to a custom value
N_FLUID *	new_n_fluid (double density, double gravity, size_t numIters, double dt, double overRelaxation, size_t sx, size_t sy)
	return a newly allocated fluid

Detailed Description

Fluid management functions , ported from https://www.youtube.com/watch?v=iKAVRgIrUOU&t=522s.

Author

Castagnier Mickael aka Gull Ra Driel

Version

1.0

Date

31/12/2022

Definition in file n_fluids.c.

Macro Definition Documentation

N_FLUID_S_FIELD

#define N_FLUID_S_FIELD   2

array number for s

Definition at line 42 of file n_fluids.c.

Referenced by n_fluid_advectSmoke(), n_fluid_advectSmoke_proc(), and n_fluid_sampleField().

N_FLUID_U_FIELD

#define N_FLUID_U_FIELD   0

array number for u

Definition at line 38 of file n_fluids.c.

Referenced by n_fluid_advectVel(), n_fluid_advectVel_proc(), and n_fluid_sampleField().

N_FLUID_V_FIELD

#define N_FLUID_V_FIELD   1

array number for v

Definition at line 40 of file n_fluids.c.

Referenced by n_fluid_advectVel(), n_fluid_advectVel_proc(), and n_fluid_sampleField().

Function Documentation

n_fluid_advectSmoke_proc()

void * n_fluid_advectSmoke_proc

(

void *

ptr

)

ready to be threaded add smoke function

Parameters

ptr	a N_FLUID_THREAD_PARAMS ptr

Returns

NULL

Definition at line 564 of file n_fluids.c.

References _z, N_FLUID::dt, N_FLUID::h, N_FLUID_S_FIELD, n_fluid_sampleField(), N_FLUID::newM, N_FLUID::numY, N_FLUID_THREAD_PARAMS::ptr, N_FLUID::u, N_FLUID::v, N_FLUID_THREAD_PARAMS::x_start, and N_FLUID_THREAD_PARAMS::y_start.

Referenced by n_fluid_simulate_threaded().

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n_fluid_advectVel_proc()

void * n_fluid_advectVel_proc

(

void *

ptr

)

ready to be threaded add velocities function

Parameters

ptr	a N_FLUID_THREAD_PARAMS ptr

Returns

NULL

Definition at line 468 of file n_fluids.c.

References _z, N_FLUID::dt, N_FLUID::h, n_fluid_avgU(), n_fluid_avgV(), n_fluid_sampleField(), N_FLUID_U_FIELD, N_FLUID_V_FIELD, N_FLUID::newU, N_FLUID::newV, N_FLUID::numY, N_FLUID_THREAD_PARAMS::ptr, N_FLUID::u, N_FLUID::v, N_FLUID_THREAD_PARAMS::x_start, and N_FLUID_THREAD_PARAMS::y_start.

Referenced by n_fluid_simulate_threaded().

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n_fluid_integrate_proc()

void * n_fluid_integrate_proc

(

void *

ptr

)

ready to be threaded integration function

Parameters

ptr	a N_FLUID_THREAD_PARAMS ptr

Returns

NULL

Definition at line 241 of file n_fluids.c.

References _z, N_FLUID::dt, N_FLUID::gravity, N_FLUID::numY, N_FLUID_THREAD_PARAMS::ptr, N_FLUID::v, N_FLUID_THREAD_PARAMS::x_start, and N_FLUID_THREAD_PARAMS::y_start.

Referenced by n_fluid_simulate_threaded().

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n_fluid_setObstacleFromBitmap()

int n_fluid_setObstacleFromBitmap	(	N_FLUID *	fluid,
		ALLEGRO_BITMAP *	bitmap,
		double	x,
		double	y,
		double	vx,
		double	vy,
		double	r )

set an obstacle in the fluid grid from a bitmap mask

Parameters

fluid	targeted N_FLUID
bitmap	the bitmap source mask
x	X position in fluid grid
y	y position in fluid grid
vx	X velocity for the point
vy	Y velocity for the point
r	radius

Returns

TRUE or FALSE

Definition at line 764 of file n_fluids.c.

References __n_assert, N_FLUID::m, N_FLUID::numX, N_FLUID::numY, N_FLUID::s, N_FLUID::u, and N_FLUID::v.

n_fluid_solveIncompressibility_proc()

void * n_fluid_solveIncompressibility_proc

(

void *

ptr

)

ready to be threaded incompressibility solving function

Parameters

ptr	a N_FLUID_THREAD_PARAMS ptr

Returns

NULL

Definition at line 278 of file n_fluids.c.

References _z, _zd, N_FLUID::density, N_FLUID::dt, N_FLUID::h, N_FLUID::numY, N_FLUID::overRelaxation, N_FLUID::p, N_FLUID_THREAD_PARAMS::ptr, N_FLUID::s, N_FLUID::u, N_FLUID::v, N_FLUID_THREAD_PARAMS::x_start, and N_FLUID_THREAD_PARAMS::y_start.

Referenced by n_fluid_simulate_threaded().

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n_memset()

void n_memset	(	void *	dst,
		const void *	val,
		size_t	size,
		size_t	count )

memset bytes to a custom value

Parameters

dst	destination pointer
val	value to write
size	size of value
count	how many val are we writting

Definition at line 51 of file n_fluids.c.

Referenced by new_n_fluid().

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