ssbo_rendering.h File Reference

Buffer-backed instancing for ultra-large-scale rendering. More...

#include "gl_common.h"
#include <cglm/types.h>

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Data Structures
struct	SphereInstanceSSBO
	Aligned structure for SSBO storage (std430 layout). More...
struct	SSBOGroup
	GPU resources for an SSBO-based render group. More...

Functions
void	ssbo_group_init (SSBOGroup *group, const SphereInstanceSSBO *data, int count)
	Initializes an SSBO group with instance data. More...
void	ssbo_group_bind_mesh (SSBOGroup *group, GLuint vbo, GLuint nbo, GLuint ebo)
	Binds a mesh (VBO/EBO) to the SSBO VAO. More...
void	ssbo_group_draw (SSBOGroup *group, size_t index_count)
	Renders the group using instanced drawing. More...
void	ssbo_group_cleanup (SSBOGroup *group)
	Releases GPU resources. More...

Detailed Description

Buffer-backed instancing for ultra-large-scale rendering.

This module uses Shader Storage Buffer Objects (SSBO) to pass instance data to the shaders. SSBOs allow for much larger data sets than standard uniform buffers or vertex attributes on some hardware.

Function Documentation

ssbo_group_bind_mesh()

void ssbo_group_bind_mesh	(	SSBOGroup *	group,
		GLuint	vbo,
		GLuint	nbo,
		GLuint	ebo
	)

Binds a mesh (VBO/EBO) to the SSBO VAO.

Parameters

group	Pointer to the struct.
vbo	Vertex buffer.
nbo	Normal buffer.
ebo	Element (index) buffer.

ssbo_group_cleanup()

void ssbo_group_cleanup

(

SSBOGroup *

group

)

Releases GPU resources.

Parameters

group

Pointer to the struct.

ssbo_group_draw()

void ssbo_group_draw	(	SSBOGroup *	group,
		size_t	index_count
	)

Renders the group using instanced drawing.

Parameters

group	Pointer to the struct.
index_count	Number of indices per sphere mesh.

ssbo_group_init()

void ssbo_group_init	(	SSBOGroup *	group,
		const SphereInstanceSSBO *	data,
		int	count
	)

Initializes an SSBO group with instance data.

Parameters

group	Pointer to the struct.
data	Array of instance data.
count	Number of instances.