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Final ideation before finish updates lua metaprogram before hello-cdrom

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ed
2026-08-21 00:23:28 -04:00
parent f1801343e2
commit b2858b3c73
8 changed files with 64 additions and 74 deletions
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code/hello_camera/hello_camera.atom.c
+1 -1
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@@ -155,7 +155,7 @@ atom_info(atom_bind(Binds_ResolveLookAtSub)) MipsAtom_Proc_(aa, {
})
typedef Struct_(Binds_ResolveLookAt_PopulateMT3S4S2) {
U4 look_at; /* MT3_S2S4* — destination matrix address */
MT3_S2S4* look_at; /* MT3_S2S4* — destination matrix address */
};
typedef Struct_(RegUse_resolve_look_at_populate_mt3s4s2) {
Reg look_at;
code/hello_camera/hello_camera.c
+33 -39
View File
@@ -80,9 +80,6 @@ typedef Struct_(SMemory) {
PadBiosRaw pad_raw[2];
PadState pad[2];
// TODO(Ed): We don't need this we can just cast at any point an address to a desired view of scratchpad, we have the address.
U4_V scratchpad; // d-cache
U1 ct_init_atom_mem[CT_InitAtomMem_Size];
MipsAtom* normalize_v3s4;
MipsAtom* gte_cross_v3s4;
@@ -114,7 +111,7 @@ I_ void resolve_look_at_c11(MT3_S2S4* look_at, P3_S4* eye, P3_S4* target, V3_S4*
V3_S4 pos, off;
forward = target[0]; sub_v3s4(& forward, eye[0]); // RGA(Lengyel): Affine point - point = zero-weight direction.
normalize_v3s4(& forward, & uz); // RGA(Lengyel): Normalize the direction bulk. Not finite-point unitization.
psy_normalize_v3s4(& forward, & uz); // RGA(Lengyel): Normalize the direction bulk. Not finite-point unitization.
cross_v3s4(& uz, up_in, & right); normalize_v3s4(& right, & ux); // RGA(Lengyel): Complement(Wedge(forward, up_in)) -> right axis.
cross_v3s4(& uz, & ux, & up); normalize_v3s4(& up, & uy); // RGA(Lengyel): Complement(Wedge(forward, right)) -> up axis.
@@ -149,8 +146,8 @@ internal void compile_init_atoms(void) {
});
regfile_reset(& rf);
smem.normalize_v3s4 = build_normalize_v3s4(& ab,
RegUse_(build_normalize_v3s4) {
smem.normalize_v3s4 = normalize_v3s4(& ab,
RegUse_(normalize_v3s4) {
.res = ralloc_v3(),
.r0 = ralloc(),
.r1 = ralloc(),
@@ -208,37 +205,36 @@ I_ void resolve_look_at(TapeBuilder_R tb, MT3_S2S4* look_at, P3_S4* eye, P3_S4*
/* Typed view of the scratchpad for field-address arithmetic. */
ResolveLookAtScratch* sp = C_scratch(ResolveLookAtScratch*);
AtomBundle_resolve_look_at_R bundle = C_(void*, smem.resolve_look_at_bundle);
tb_emit(tb, bundle->input_and_sub); {
tb_data(tb, u4_(target));
tb_data(tb, u4_(eye));
tb_data(tb, u4_(up_in));
}
tb_emit(tb, bundle->normalize_fwd_uz); {
// tb_data(tb, u4_(O_(ResolveLookAtScratch, fwd) | (O_(ResolveLookAtScratch, uz) << 16)));
tb_bind_(tb, Binds_NormalizeV3S4,
.src_offset = O_(ResolveLookAtScratch,fwd),
.dst_offset = O_(ResolveLookAtScratch,uz),
);
}
tb_emit(tb, bundle->cross_to_right); {
tb_data(tb, u4_(& sp->uz));
tb_data(tb, u4_(& sp->up_in));
tb_data(tb, u4_(& sp->right));
}
tb_emit(tb, bundle->normalize_right_ux); {
tb_data(tb, u4_(O_(ResolveLookAtScratch, right) | (O_(ResolveLookAtScratch, ux) << 16)));
}
tb_emit(tb, bundle->cross_to_up); {
tb_data(tb, u4_(& sp->uz));
tb_data(tb, u4_(& sp->ux));
tb_data(tb, u4_(& sp->up));
}
tb_emit(tb, bundle->normalize_up_uy); {
tb_data(tb, u4_(O_(ResolveLookAtScratch, up) | (O_(ResolveLookAtScratch, uy) << 16)));
}
tb_emit(tb, bundle->populate_mt3s4s2); {
tb_data(tb, u4_(look_at));
}
tb_emit(tb, bundle->input_and_sub); tb_bind_(tb, Binds_ResolveLookAtSub,
.target = target,
.eye = eye,
.up_in = up_in,
);
tb_emit(tb, bundle->normalize_fwd_uz); tb_bind_(tb, Binds_normalize_v3s4,
.src_offset = O_(ResolveLookAtScratch,fwd),
.dst_offset = O_(ResolveLookAtScratch,uz),
);
tb_emit(tb, bundle->cross_to_right); tb_bind_(tb, Binds_gte_cross_v3s4,
.src_a = & sp->uz,
.src_b = & sp->up_in,
.out = & sp->right,
);
tb_emit(tb, bundle->normalize_right_ux); tb_bind_(tb, Binds_normalize_v3s4,
.src_offset = O_(ResolveLookAtScratch,right),
.dst_offset = O_(ResolveLookAtScratch,ux),
);
tb_emit(tb, bundle->cross_to_up); tb_bind_(tb, Binds_gte_cross_v3s4,
.src_a = & sp->uz,
.src_b = & sp->ux,
.out = & sp->up,
);
tb_emit(tb, bundle->normalize_up_uy); tb_bind_(tb, Binds_normalize_v3s4,
.src_offset = O_(ResolveLookAtScratch,up),
.dst_offset = O_(ResolveLookAtScratch,uy),
);
tb_emit(tb, bundle->populate_mt3s4s2); tb_bind_(tb, Binds_ResolveLookAt_PopulateMT3S4S2,
.look_at = look_at,
);
}
FI_ void camera_look_at(TapeBuilder_R tb, Camera* c, P3_S4* target, V3_S4* up_in) { resolve_look_at(tb, & c->look_at, & c->pos, target, up_in); }
@@ -397,8 +393,6 @@ GCC_OPTIMIZATION_DISABLE
int main(void)
{
smem = (SMemory){0};
// TODO(Ed): remove this field we don't need it in smem.
smem.scratchpad = C_(U4_V, Scratchpad_Loc);
// smem.primitives.used = 0;
// smem.active_buf_id = 0;
smem.cam.pos = v3s4(500, -1000, -1500);