light_probes.c File Reference

#include <glad/glad.h>
#include "light_probes.h"
#include "log.h"
#include "perf_timer.h"
#include "profiler.h"
#include "render_utils.h"
#include "shader.h"
#include "utils.h"
#include <float.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for light_probes.c:

Data Structures
struct	CachedSphere

Macros
#define	M_PI   3.14159265358979323846
#define	USE_SH_BAKE_FACTORS   1
#define	SH_COEFF_COUNT   9
#define	GI_BOUNCE_SCALE   2.0F
#define	GI_MIN_DIST_RADII   1.05F
#define	GI_MAX_DIST_RADII   3.0F
#define	GI_EPSILON   0.000001F
#define	GI_HALF   0.5F
#define	GI_ZERO   0.0F

Enumerations
enum	{ GI_DEBUG_PROBE_VERTICES = 6 , GI_WIRE_CUBE_VERTICES = 24 , GI_LOG_BUF_SIZE = 128 , GI_SMALL_LOG_BUF_SIZE = 64 }

Functions
static void	get_sphere_pos (const SphereInstance_POD *sphere, vec3 dest)
static float	get_sphere_radius (const SphereInstance_POD *sphere)
void	light_probe_grid_compute_aabb (LightProbeGrid *grid, const void *spheres, int count, size_t stride, float padding)
	Computes the AABB for the grid based on sphere instances. More...
void	light_probe_grid_init_cpu (LightProbeGrid *grid, int dim_x, int dim_y, int dim_z)
	Initializes the grid structure (CPU only). More...
void	light_probe_grid_free_cpu (LightProbeGrid *grid)
	Cleans up CPU resources. More...
static void	compute_probe_sh (const CachedSphere *cached_scene, int local_count, vec3 probe_pos, SH9 *sh_data)
static int	is_probe_inside_sphere (vec3 probe_pos, const CachedSphere *cached_scene, int local_count)
static void	light_probe_worker_compute_probe (LightProbeGrid *grid, int grid_x, int grid_y, int grid_z, const CachedSphere *cached_scene, int local_count)
static void *	precompute_cached_spheres (SphereInstance_POD *local_scene, int local_count)
static void *	light_probe_worker (void *arg)
void	light_probe_grid_init (LightProbeGrid *grid, int dim_x, int dim_y, int dim_z)
	Initializes the grid structure, creates SSBO, and starts worker thread. More...
void	light_probe_grid_set_bounds (LightProbeGrid *grid, vec3 aabb_min, vec3 aabb_max)
	Sets the grid AABB and computes cell sizes from dimensions. More...
void	light_probe_grid_set_scene (LightProbeGrid *grid, const void *spheres, int count, size_t stride)
	Updates the scene data used by the grid (copies it). More...
void	light_probe_grid_update_async (LightProbeGrid *grid)
	Signals the worker thread to perform an SH update. More...
void	light_probe_grid_sync (LightProbeGrid *grid)
	Checks if results are ready and uploads to GPU. Should be called on main thread. More...
void	light_probe_grid_cleanup (LightProbeGrid *grid)
	Cleans up all resources (CPU, GPU, Threads). More...
void	light_probe_render_debug (LightProbeGrid *grid, mat4 view, mat4 proj)
	Renders debug spheres for the probes. More...

Macro Definition Documentation

GI_BOUNCE_SCALE

#define GI_BOUNCE_SCALE   2.0F

GI_EPSILON

#define GI_EPSILON   0.000001F

GI_HALF

#define GI_HALF   0.5F

GI_MAX_DIST_RADII

#define GI_MAX_DIST_RADII   3.0F

GI_MIN_DIST_RADII

#define GI_MIN_DIST_RADII   1.05F

GI_ZERO

#define GI_ZERO   0.0F

M_PI

#define M_PI   3.14159265358979323846

SH_COEFF_COUNT

#define SH_COEFF_COUNT   9

USE_SH_BAKE_FACTORS

#define USE_SH_BAKE_FACTORS   1

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
GI_DEBUG_PROBE_VERTICES
GI_WIRE_CUBE_VERTICES
GI_LOG_BUF_SIZE
GI_SMALL_LOG_BUF_SIZE

Function Documentation

compute_probe_sh()

static void compute_probe_sh ( const CachedSphere *  cached_scene, int  local_count, vec3  probe_pos, SH9 *  sh_data  )

static

Here is the call graph for this function:

get_sphere_pos()

static void get_sphere_pos ( const SphereInstance_POD *  sphere, vec3  dest  )

static

get_sphere_radius()

static float get_sphere_radius ( const SphereInstance_POD *  sphere )

static

is_probe_inside_sphere()

static int is_probe_inside_sphere ( vec3  probe_pos, const CachedSphere *  cached_scene, int  local_count  )

static

light_probe_grid_cleanup()

void light_probe_grid_cleanup

(

LightProbeGrid *

grid

)

Cleans up all resources (CPU, GPU, Threads).

Here is the call graph for this function:

light_probe_grid_compute_aabb()

void light_probe_grid_compute_aabb	(	LightProbeGrid *	grid,
		const void *	spheres,
		int	count,
		size_t	stride,
		float	padding
	)

Computes the AABB for the grid based on sphere instances.

Parameters

grid	Pointer to grid.
spheres	Array of sphere instances (generic pointer to avoid GL dep in header if needed).
count	Number of spheres.
stride	Stride between spheres.
padding	Padding to add to the AABB.

Here is the call graph for this function:

light_probe_grid_free_cpu()

void light_probe_grid_free_cpu

(

LightProbeGrid *

grid

)

Cleans up CPU resources.

light_probe_grid_init()

void light_probe_grid_init	(	LightProbeGrid *	grid,
		int	dim_x,
		int	dim_y,
		int	dim_z
	)

Initializes the grid structure, creates SSBO, and starts worker thread.

Here is the call graph for this function:

light_probe_grid_init_cpu()

void light_probe_grid_init_cpu	(	LightProbeGrid *	grid,
		int	dim_x,
		int	dim_y,
		int	dim_z
	)

Initializes the grid structure (CPU only).

Parameters

grid	Pointer to grid.
dim_x	Grid dimension X.
dim_y	Grid dimension Y.
dim_z	Grid dimension Z.

light_probe_grid_set_bounds()

void light_probe_grid_set_bounds	(	LightProbeGrid *	grid,
		vec3	aabb_min,
		vec3	aabb_max
	)

Sets the grid AABB and computes cell sizes from dimensions.

light_probe_grid_set_scene()

void light_probe_grid_set_scene	(	LightProbeGrid *	grid,
		const void *	spheres,
		int	count,
		size_t	stride
	)

Updates the scene data used by the grid (copies it).

Here is the call graph for this function:

light_probe_grid_sync()

void light_probe_grid_sync

(

LightProbeGrid *

grid

)

Checks if results are ready and uploads to GPU. Should be called on main thread.

light_probe_grid_update_async()

void light_probe_grid_update_async

(

LightProbeGrid *

grid

)

Signals the worker thread to perform an SH update.

light_probe_render_debug()

void light_probe_render_debug	(	LightProbeGrid *	grid,
		mat4	view,
		mat4	proj
	)

Renders debug spheres for the probes.

Parameters

grid	Pointer to grid.
view	View matrix.
proj	Projection matrix.

Here is the call graph for this function:

light_probe_worker()

static void* light_probe_worker ( void *  arg )

static

Here is the call graph for this function:

light_probe_worker_compute_probe()

static void light_probe_worker_compute_probe ( LightProbeGrid *  grid, int  grid_x, int  grid_y, int  grid_z, const CachedSphere *  cached_scene, int  local_count  )

static

Here is the call graph for this function:

precompute_cached_spheres()

static void* precompute_cached_spheres ( SphereInstance_POD *  local_scene, int  local_count  )

static

Here is the call graph for this function: