skybox.h File Reference

Infinite-distance background rendering (fullscreen quad approach). More...

#include "gl_common.h"
#include "shader.h"
#include <cglm/cam.h>
#include <cglm/mat4.h>
#include <cglm/types.h>

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Data Structures
struct	Skybox
	Persistent state and resource handles for the environment renderer. More...

Functions
void	skybox_init (Skybox *skybox, Shader *shader)
	Initializes skybox geometry and caches uniform locations. More...
void	skybox_render (Skybox *skybox, Shader *shader, GLuint env_map, GLuint fallback_tex, const mat4 inv_view_proj, float blur_lod)
	Renders the skybox to the current framebuffer. More...
void	skybox_cleanup (Skybox *skybox)
	Cleans up GPU resources. More...

Detailed Description

Infinite-distance background rendering (fullscreen quad approach).

This module renders the environment map using a raycasting approach on a full-screen quad, which is more efficient than a traditional cube mesh and easier to integrate with depth-based post-processing.

Function Documentation

skybox_cleanup()

void skybox_cleanup

(

Skybox *

skybox

)

Cleans up GPU resources.

Parameters

skybox

Pointer to the struct.

skybox_init()

void skybox_init	(	Skybox *	skybox,
		Shader *	shader
	)

Initializes skybox geometry and caches uniform locations.

Parameters

skybox	Pointer to the struct.
shader	The compiled skybox shader wrapper.

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skybox_render()

void skybox_render	(	Skybox *	skybox,
		Shader *	shader,
		GLuint	env_map,
		GLuint	fallback_tex,
		const mat4	inv_view_proj,
		float	blur_lod
	)

Renders the skybox to the current framebuffer.

Parameters

skybox	Pointer to the struct.
shader	Shader to use.
env_map	Primary HDR cubemap texture.
fallback_tex	Dummy texture if env_map is invalid.
inv_view_proj	Inverse of the current View-Proj matrix.
blur_lod	Level of mip-map detail (0.0 for sharp, higher for blurry).

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