uv.h File Reference

#include "common.h"
#include "bu/vls.h"
#include "bu/mapped_file.h"
#include "vmath.h"
#include "rt/geom.h"
#include "rt/functab.h"

Include dependency graph for uv.h:

Go to the source code of this file.

Data Structures
struct	rt_texture

Macros
#define	TXT_SRC_FILE   'f'
#define	TXT_SRC_OBJECT   'o'
#define	TXT_SRC_AUTO   0
#define	RT_TEXTURE_INIT_ZERO   {{0,0,0}, BU_VLS_INIT_ZERO, 0, 0, 0, {0.0, 0.0}, 0, 0, NULL, NULL}
#define	RT_HIT_UV(_ap, _stp, _hitp, _uvp)

Functions
int	rt_texture_load (struct rt_texture *tp, const char *name, struct db_i *dbip)
int	rt_texture_lookup (fastf_t *data, const struct rt_texture *tp, const struct uvcoord *uvp)

Detailed Description

This file is API pertaining to uv parameterization on objects.

Definition in file uv.h.

Macro Definition Documentation

TXT_SRC_FILE

#define TXT_SRC_FILE   'f'

Definition at line 81 of file uv.h.

TXT_SRC_OBJECT

#define TXT_SRC_OBJECT   'o'

Definition at line 82 of file uv.h.

TXT_SRC_AUTO

#define TXT_SRC_AUTO   0

Definition at line 83 of file uv.h.

RT_TEXTURE_INIT_ZERO

#define RT_TEXTURE_INIT_ZERO   {{0,0,0}, BU_VLS_INIT_ZERO, 0, 0, 0, {0.0, 0.0}, 0, 0, NULL, NULL}

initialize an rt_texture to zero

Definition at line 95 of file uv.h.

RT_HIT_UV

#define RT_HIT_UV	(		_ap,
			_stp,
			_hitp,
			_uvp
	)

Value:

        { \
	RT_CK_HIT(_hitp); \
	RT_CK_SOLTAB(_stp); \
	RT_CK_FUNCTAB((_stp)->st_meth); \
	if ((_stp)->st_meth->ft_uv) { \
            (_stp)->st_meth->ft_uv(ap, _stp, _hitp, uvp); \
        } \
    }

As rt_shootray() only calculates hit points and returns a list of partitions, applications must request that the corresponding UV coordinate be computed via: RT_HIT_UV(NULL, hitp, stp, rayp, 0);

These calculations are deferred to user code to avoid needless computation in other ray situations.

Definition at line 116 of file uv.h.

Function Documentation

rt_texture_load()

int rt_texture_load	(	struct rt_texture *	tp,
		const char *	name,
		struct db_i *	dbip
	)

loads a texture from either a file or database object.

Todo:

replace txt_load_datasource in liboptical

rt_texture_lookup()

int rt_texture_lookup	(	fastf_t *	data,
		const struct rt_texture *	tp,
		const struct uvcoord *	uvp
	)

Given a uv coordinate (0.0 <= u, v <= 1.0) and a texture, return a pointer to the corresponding texture data (as a fastf_t[3]).

Todo:

replace txt_render in liboptical