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[qfcc] Implement 2d PGA outer products

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The specialization is really just in the layout.
This commit is contained in:
Bill Currie 2023-08-23 21:52:33 +09:00
parent da1b797cb7
commit 469fdea0a1
2 changed files with 48 additions and 0 deletions
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39
tools/qfcc/source/expr_algebra.c
View file

@ -422,6 +422,40 @@ static void (*pga3_wedge_funcs[6][6])(expr_t**,expr_t*,expr_t*,algebra_t*) = {
},
};
// vector-bivector wedge is commutative
#define pga2_x_y_w_wedge_yw_wx_xy pga2_yw_wx_xy_wedge_x_y_w
static void
pga2_yw_wx_xy_wedge_x_y_w (expr_t **c, expr_t *a, expr_t *b, algebra_t *alg)
{
c[3] = dot_expr (algebra_mvec_type (alg, 0x08), a, b);
}
static void
pga2_x_y_w_wedge_x_y_w (expr_t **c, expr_t *a, expr_t *b, algebra_t *alg)
{
auto wedge_type = algebra_mvec_type (alg, 0x01);
c[0] = new_binary_expr (CROSS, a, b);
c[0]->e.expr.type = wedge_type;
}
static void (*pga2_wedge_funcs[4][4])(expr_t**,expr_t*,expr_t*,algebra_t*) = {
[0] = {
[1] = scale_component,
[2] = pga2_yw_wx_xy_wedge_x_y_w,
},
[1] = {
[0] = scale_component,
[1] = scale_component,
[2] = scale_component,
[3] = scale_component,
},
[2] = {
[0] = pga2_x_y_w_wedge_yw_wx_xy,
[1] = scale_component,
[2] = pga2_x_y_w_wedge_x_y_w,
},
};
static void
component_wedge (expr_t **c, expr_t *a, expr_t *b, algebra_t *algebra)
{
@ -436,6 +470,11 @@ component_wedge (expr_t **c, expr_t *a, expr_t *b, algebra_t *algebra)
pga3_wedge_funcs[ga][gb] (c, a, b, algebra);
}
} else if (p == 2 && m == 0 && z == 1) {
int ga = get_group (get_type (a), algebra);
int gb = get_group (get_type (b), algebra);
if (pga2_wedge_funcs[ga][gb]) {
pga2_wedge_funcs[ga][gb] (c, a, b, algebra);
}
} else {
}
}

9
tools/qfcc/test/algtypes.r
View file

@ -9,6 +9,9 @@
typedef @algebra(float(3,0,1)) PGA;
typedef @algebra(float(4,1)) CGA;
typedef @algebra(double(2,0,1)) PGA2;
PGA2 pga2;
float sin(float x) = #0;
int
@ -34,5 +37,11 @@ main (void)
auto mvec = rx + ry;
#endif
}
@algebra (PGA2) {
auto l1 = e1 + 2 * e2 + 5 * e0;
auto l2 = 3 * e1 - e2 + 10 * e0;
auto p = l1∧l2;
pga2 = p + (1 + p)∧l1;
}
return 0; // to survive and prevail :)
}