mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-26 22:31:05 +00:00
5f22fd07d9
Also, correct the handling of scalars in dot and wedge products: it turns out s.v and s^v both scale. However, it seems the CSE code loses things sometimes.
111 lines
3.7 KiB
C
111 lines
3.7 KiB
C
/*
|
|
algebra.h
|
|
|
|
QC geometric algebra support code
|
|
|
|
Copyright (C) 2023 Bill Currie <bill@taniwha.org>
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
|
|
#ifndef __algebra_h
|
|
#define __algebra_h
|
|
|
|
#include "QF/set.h"
|
|
#include "QF/progs/pr_comp.h"
|
|
|
|
typedef struct basis_blade_s {
|
|
pr_uint_t mask; ///< bit-mask of basis vectors
|
|
int scale; ///< 1, 0, or -1
|
|
} basis_blade_t;
|
|
|
|
typedef struct basis_group_s {
|
|
int count;
|
|
pr_uint_t group_mask;
|
|
pr_uivec2_t range;
|
|
basis_blade_t *blades;
|
|
int *map;
|
|
set_t *set;
|
|
} basis_group_t;
|
|
|
|
typedef struct basis_layout_s {
|
|
int count;
|
|
pr_uivec2_t range;
|
|
basis_group_t *groups;
|
|
pr_ivec3_t *group_map;
|
|
int *mask_map;
|
|
int blade_count;
|
|
set_t *set;
|
|
} basis_layout_t;
|
|
|
|
typedef struct metric_s {
|
|
pr_uint_t plus; ///< mask of elements that square to +1
|
|
pr_uint_t minus; ///< mask of elements that square to -1
|
|
pr_uint_t zero; ///< mask of elements that square to 0
|
|
} metric_t;
|
|
|
|
typedef struct algebra_s {
|
|
struct type_s *type; ///< underlying type (float or double)
|
|
struct type_s *algebra_type;///< type for algebra
|
|
metric_t metric;
|
|
basis_layout_t layout;
|
|
basis_group_t *groups;
|
|
struct type_s **mvec_types;
|
|
int num_components; ///< number of componets (2^d)
|
|
int dimension; ///< number of dimensions (plus + minus + zero)
|
|
int plus; ///< number of elements squaring to +1
|
|
int minus; ///< number of elements squaring to -1
|
|
int zero; ///< number of elements squaring to 0
|
|
} algebra_t;
|
|
|
|
typedef struct multivector_s {
|
|
int num_components;
|
|
int group_mask;
|
|
algebra_t *algebra;
|
|
} multivector_t;
|
|
|
|
struct expr_s;
|
|
bool is_algebra (const struct type_s *type) __attribute__((pure));
|
|
struct type_s *algebra_type (struct type_s *type, struct expr_s *params);
|
|
struct type_s *algebra_mvec_type (algebra_t *algebra, pr_uint_t group_mask);
|
|
struct ex_value_s *algebra_blade_value (algebra_t *alg, const char *name);
|
|
struct symtab_s *algebra_scope (struct type_s *type, struct symtab_s *curscope);
|
|
void algebra_print_type_str (struct dstring_s *str, const struct type_s *type);
|
|
void algebra_encode_type (struct dstring_s *encoding,
|
|
const struct type_s *type);
|
|
int algebra_type_size (const struct type_s *type) __attribute__((pure));
|
|
int algebra_type_width (const struct type_s *type) __attribute__((pure));
|
|
|
|
int metric_apply (const metric_t *metric, pr_uint_t a, pr_uint_t b) __attribute__((pure));
|
|
|
|
algebra_t *algebra_get (const struct type_s *type) __attribute__((pure));
|
|
int algebra_type_assignable (const struct type_s *dst,
|
|
const struct type_s *src) __attribute__((pure));
|
|
struct type_s *algebra_base_type (const struct type_s *type) __attribute__((pure));
|
|
|
|
struct expr_s *algebra_binary_expr (int op, struct expr_s *e1,
|
|
struct expr_s *e2);
|
|
struct expr_s *algebra_negate (struct expr_s *e);
|
|
struct expr_s *algebra_dual (struct expr_s *e);
|
|
struct expr_s *algebra_reverse (struct expr_s *e);
|
|
struct expr_s *algebra_cast_expr (struct type_s *dstType, struct expr_s *e);
|
|
struct expr_s *algebra_assign_expr (struct expr_s *dst, struct expr_s *src);
|
|
|
|
#endif//__algebra_h
|