Macros
#define	DM_TANGENT_MASK_ORCO (1 << 9)

Functions
void	BKE_mesh_calc_loop_tangent_single_ex (const struct MVert mverts, int numVerts, const struct MLoop mloops, float(r_looptangent)[4], const float(loopnors)[3], const struct MLoopUV loopuv, int numLoops, const struct MPoly mpolys, int numPolys, struct ReportList *reports)

void	BKE_mesh_calc_loop_tangent_single (struct Mesh mesh, const char uvmap, float(r_looptangents)[4], struct ReportList reports)

void	BKE_mesh_calc_loop_tangent_ex (const struct MVert mvert, const struct MPoly mpoly, uint mpoly_len, const struct MLoop mloop, const struct MLoopTri looptri, uint looptri_len, struct CustomData loopdata, bool calc_active_tangent, const char(tangent_names)[64], int tangent_names_len, const float(vert_normals)[3], const float(poly_normals)[3], const float(loop_normals)[3], const float(vert_orco)[3], struct CustomData loopdata_out, uint loopdata_out_len, short tangent_mask_curr_p)

void	BKE_mesh_calc_loop_tangents (struct Mesh me_eval, bool calc_active_tangent, const char(tangent_names)[MAX_NAME], int tangent_names_len)

void	BKE_mesh_add_loop_tangent_named_layer_for_uv (struct CustomData uv_data, struct CustomData tan_data, int numLoopData, const char *layer_name)

void	BKE_mesh_calc_loop_tangent_step_0 (const struct CustomData loopData, bool calc_active_tangent, const char(tangent_names)[64], int tangent_names_count, bool rcalc_act, bool rcalc_ren, int ract_uv_n, int rren_uv_n, char ract_uv_name, char rren_uv_name, short *rtangent_mask)

Macro Definition Documentation

◆ DM_TANGENT_MASK_ORCO

#define DM_TANGENT_MASK_ORCO (1 << 9)

Definition at line 75 of file BKE_mesh_tangent.h.

Function Documentation

◆ BKE_mesh_add_loop_tangent_named_layer_for_uv()

void BKE_mesh_add_loop_tangent_named_layer_for_uv	(	struct CustomData *	uv_data,
		struct CustomData *	tan_data,
		int	numLoopData,
		const char *	layer_name
	)

Definition at line 448 of file mesh_tangent.c.

References CD_CALLOC, CD_MLOOPUV, CD_TANGENT, CustomData_add_layer_named(), CustomData_get_named_layer_index(), and NULL.

Referenced by BKE_editmesh_loop_tangent_calc(), and BKE_mesh_calc_loop_tangent_ex().

◆ BKE_mesh_calc_loop_tangent_ex()

void BKE_mesh_calc_loop_tangent_ex	(	const struct MVert *	mvert,
		const struct MPoly *	mpoly,
		uint	mpoly_len,
		const struct MLoop *	mloop,
		const struct MLoopTri *	looptri,
		uint	looptri_len,
		struct CustomData *	loopdata,
		bool	calc_active_tangent,
		const char(*)	tangent_names[64],
		int	tangent_names_len,
		const float(*)	vert_normals[3],
		const float(*)	poly_normals[3],
		const float(*)	loop_normals[3],
		const float(*)	vert_orco[3],
		struct CustomData *	loopdata_out,
		uint	loopdata_out_len,
		short *	tangent_mask_curr_p
	)

See: BKE_editmesh_loop_tangent_calc (matching logic).

Referenced by do_multires_bake(), and blender::draw::extract_tan_init_common().

◆ BKE_mesh_calc_loop_tangent_single()

void BKE_mesh_calc_loop_tangent_single	(	struct Mesh *	mesh,
		const char *	uvmap,
		float(*)	r_looptangents[4],
		struct ReportList *	reports
	)

Wrapper around BKE_mesh_calc_loop_tangent_single_ex, which takes care of most boilerplate code.

Note

There must be a valid loop's CD_NORMALS available.
The mesh should be made of only tris and quads!

Definition at line 153 of file mesh_tangent.c.

References BKE_mesh_calc_loop_tangent_single_ex(), BKE_report(), BKE_reportf(), CD_MLOOPUV, CD_NORMAL, CustomData_get_layer(), CustomData_get_layer_named(), float(), Mesh::ldata, mesh, Mesh::mloop, Mesh::mpoly, Mesh::mvert, RPT_ERROR, Mesh::totloop, Mesh::totpoly, and Mesh::totvert.

◆ BKE_mesh_calc_loop_tangent_single_ex()

void BKE_mesh_calc_loop_tangent_single_ex	(	const struct MVert *	mverts,
		int	numVerts,
		const struct MLoop *	mloops,
		float(*)	r_looptangent[4],
		const float(*)	loopnors[3],
		const struct MLoopUV *	loopuv,
		int	numLoops,
		const struct MPoly *	mpolys,
		int	numPolys,
		struct ReportList *	reports
	)

Compute simplified tangent space normals, i.e. tangent vector + sign of bi-tangent one, which combined with split normals can be used to recreate the full tangent space. NOTE: * The mesh should be made of only tris and quads!

◆ BKE_mesh_calc_loop_tangent_step_0()

void BKE_mesh_calc_loop_tangent_step_0	(	const struct CustomData *	loopData,
		bool	calc_active_tangent,
		const char(*)	tangent_names[64],
		int	tangent_names_count,
		bool *	rcalc_act,
		bool *	rcalc_ren,
		int *	ract_uv_n,
		int *	rren_uv_n,
		char *	ract_uv_name,
		char *	rren_uv_name,
		short *	rtangent_mask
	)

Here we get some useful information such as active uv layer name and search if it is already in tangent_names. Also, we calculate tangent_mask that works as a descriptor of tangents state. If tangent_mask has changed, then recalculate tangents.

Referenced by BKE_editmesh_loop_tangent_calc().

◆ BKE_mesh_calc_loop_tangents()

void BKE_mesh_calc_loop_tangents	(	struct Mesh *	me_eval,
		bool	calc_active_tangent,
		const char(*)	tangent_names[MAX_NAME],
		int	tangent_names_len
	)

Definition at line 712 of file mesh_tangent.c.

References MLoopTri_Store::array, BKE_mesh_calc_loop_tangent_ex(), BKE_mesh_poly_normals_ensure(), BKE_mesh_runtime_looptri_ensure(), BKE_mesh_vertex_normals_ensure(), CD_NORMAL, CD_ORCO, CustomData_get_layer(), Mesh::ldata, MLoopTri_Store::len, Mesh_Runtime::looptris, Mesh::mloop, Mesh::mpoly, Mesh::mvert, Mesh::runtime, Mesh::totloop, Mesh::totpoly, and Mesh::vdata.

Referenced by mesh_calc_tri_tessface().

Macros

Functions