instanced_rendering.h File Reference

Mesh-based instanced rendering for spheres. More...

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

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Data Structures
struct	SphereInstance
	Per-instance data sent to the shader via an instanced VBO. More...
struct	InstancedGroup
	Manages mesh-based instanced spheres on the GPU. More...

Functions
void	instanced_group_init (InstancedGroup *group, const SphereInstance *data, int count)
	Allocates the instance VBO on the GPU. More...
void	instanced_group_bind_mesh (InstancedGroup *group, GLuint vbo, GLuint nbo, GLuint ebo)
	Binds a procedural mesh (e.g., icosphere) to the instanced group. More...
void	instanced_group_draw (InstancedGroup *group, size_t index_count)
	Executes an indexed instanced draw call. More...
void	instanced_group_cleanup (InstancedGroup *group)
	Releases all GPU resources for the instanced group. More...

Detailed Description

Mesh-based instanced rendering for spheres.

This module handles high-performance drawing of multiple mesh-based spheres using glDrawElementsInstanced. It uses a SIMD-aligned structure for instance data.

Function Documentation

instanced_group_bind_mesh()

void instanced_group_bind_mesh	(	InstancedGroup *	group,
		GLuint	vbo,
		GLuint	nbo,
		GLuint	ebo
	)

Binds a procedural mesh (e.g., icosphere) to the instanced group.

Parameters

group	Pointer to the group.
vbo	Mesh vertex VBO.
nbo	Mesh normal VBO.
ebo	Mesh index EBO.

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instanced_group_cleanup()

void instanced_group_cleanup

(

InstancedGroup *

group

)

Releases all GPU resources for the instanced group.

Parameters

group

Pointer to the group.

instanced_group_draw()

void instanced_group_draw	(	InstancedGroup *	group,
		size_t	index_count
	)

Executes an indexed instanced draw call.

Parameters

group	Pointer to the group.
index_count	Number of indices in the base mesh.

instanced_group_init()

void instanced_group_init	(	InstancedGroup *	group,
		const SphereInstance *	data,
		int	count
	)

Allocates the instance VBO on the GPU.

Parameters

group	Pointer to the group.
data	Initial data (optional).
count	Number of instances.