billboard_renderer.c File Reference

#include "billboard_renderer.h"
#include "billboard_sorter.h"
#include "bool_utils.h"
#include "gl_common.h"
#include "render_utils.h"
#include "scene_uniforms.h"
#include "sphere_types.h"
#include "utils.h"
#include <assert.h>
#include <stddef.h>
#include <string.h>

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Functions
static void	create_billboard_vao (GLuint *vao, GLuint geometry_vbo, GLuint instance_vbo)
void	billboard_renderer_init (BillboardRenderer *renderer, int initial_capacity)
	Initializes the billboard renderer and allocates internal sorter buffers.
void	billboard_renderer_prepare (BillboardRenderer *renderer, GLuint quad_vbo, GLuint wire_quad_vbo, GLuint wire_cube_vbo)
	Prepares the VAO by linking the shared quad, wire quad, and wire cube VBOs.
static void	billboard_renderer_update_from_buffer (BillboardRenderer *renderer, GLuint src_buffer, int count)
static void	update_billboard_ubo (const BillboardRenderParams *params, void *billboard_ubo_ptr)
static void	draw_primary_pass (BillboardRenderer *renderer, GLuint pbr_billboard_shader, int instance_count)
static void	update_debug_uniform_locations (BillboardRenderer *renderer, GLuint debug_line_shader)
static void	draw_debug_overlays (BillboardRenderer *renderer, const BillboardRenderParams *params, GLuint debug_line_shader, GLuint sorted_ssbo)
void	billboard_renderer_draw (BillboardRenderer *renderer, const BillboardRenderParams *params, GLuint pbr_billboard_shader, GLuint debug_line_shader, void *billboard_ubo_ptr)
	Executes the sorting, UBO upload, and drawing commands for all billboards.
void	billboard_renderer_cleanup (BillboardRenderer *renderer)
	Releases all GPU resources allocated for the billboard renderer.

Variables
static const int	WIRE_CUBE_VERTEX_COUNT = 24

Function Documentation

billboard_renderer_cleanup()

void billboard_renderer_cleanup

(

BillboardRenderer *

renderer

)

Releases all GPU resources allocated for the billboard renderer.

Parameters

renderer

Pointer to the renderer struct.

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billboard_renderer_draw()

void billboard_renderer_draw	(	BillboardRenderer *	renderer,
		const BillboardRenderParams *	params,
		GLuint	pbr_billboard_shader,
		GLuint	debug_line_shader,
		void *	billboard_ubo_ptr
	)

Executes the sorting, UBO upload, and drawing commands for all billboards.

Parameters

renderer	Pointer to the renderer struct.
params	Stateless parameter block.
pbr_billboard_shader	Shader used for the primary PBR pass.
debug_line_shader	Shader used for the wireframe debug overlays.
billboard_ubo_ptr	Mapped UBO pointer to copy the BillboardUBO struct to.

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billboard_renderer_init()

void billboard_renderer_init	(	BillboardRenderer *	renderer,
		int	initial_capacity
	)

Initializes the billboard renderer and allocates internal sorter buffers.

Parameters

renderer	Pointer to the renderer struct.
initial_capacity	Expected number of instances.

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billboard_renderer_prepare()

void billboard_renderer_prepare	(	BillboardRenderer *	renderer,
		GLuint	quad_vbo,
		GLuint	wire_quad_vbo,
		GLuint	wire_cube_vbo
	)

Prepares the VAO by linking the shared quad, wire quad, and wire cube VBOs.

Parameters

renderer	Pointer to the renderer struct.
quad_vbo	VBO containing basic quad geometry.
wire_quad_vbo	VBO for debug wireframe quad.
wire_cube_vbo	VBO for debug wireframe unit box.

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billboard_renderer_update_from_buffer()

static void billboard_renderer_update_from_buffer ( BillboardRenderer *  renderer, GLuint  src_buffer, int  count  )

static

create_billboard_vao()

static void create_billboard_vao ( GLuint *  vao, GLuint  geometry_vbo, GLuint  instance_vbo  )

static

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draw_debug_overlays()

static void draw_debug_overlays ( BillboardRenderer *  renderer, const BillboardRenderParams *  params, GLuint  debug_line_shader, GLuint  sorted_ssbo  )

static

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draw_primary_pass()

static void draw_primary_pass ( BillboardRenderer *  renderer, GLuint  pbr_billboard_shader, int  instance_count  )

static

update_billboard_ubo()

static void update_billboard_ubo ( const BillboardRenderParams *  params, void *  billboard_ubo_ptr  )

static

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update_debug_uniform_locations()

static void update_debug_uniform_locations ( BillboardRenderer *  renderer, GLuint  debug_line_shader  )

static

Variable Documentation

WIRE_CUBE_VERTEX_COUNT

const int WIRE_CUBE_VERTEX_COUNT = 24

static