ed/pikuma_ps1
1
0
Fork 0
mirror of https://github.com/Ed94/pikuma_ps1.git synced 2026-08-14 11:38:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

wip: starting to review and update lua metaprogram with more modeling of gte.

Browse Source
This commit is contained in:
ed
2026-08-13 18:51:09 -04:00
parent 4688566767
commit 640dab7e61
6 changed files with 284 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files
code/hello_camera/hello_camera.c
+14 -47
View File
@@ -340,7 +340,7 @@ internal void resolve_look_at_init(void) {
* the matrix pointer (popped from tape). It does NOT need GPR
* assignment from us — it has its own internal GPR usage.
* We just take its address. */
smem.resolve_look_at_atom_addrs[9] = (MipsAtom*) & set_gte_mt3s2s4;
smem.resolve_look_at_atom_addrs[7] = (MipsAtom*) & set_gte_mt3s2s4;
/* === ATOM 6b: matrix_vector (RT * (-eye) >> 12) ===
* Uses mac_apply_matrix_lv component macro which internally uses
@@ -352,7 +352,7 @@ internal void resolve_look_at_init(void) {
U4 const r_tmp0_6b = R_T2;
U4 const r_tmp1_6b = R_T3;
U4 const r_tmp2_6b = R_T5;
smem.resolve_look_at_atom_addrs[7] = resolve_look_at__matrix_vector_proc(& ab,
smem.resolve_look_at_atom_addrs[8] = resolve_look_at__matrix_vector_proc(& ab,
r_scratch_6b, r_peye_6b, r_look_at_6b,
r_tmp0_6b, r_tmp1_6b, r_tmp2_6b);
@@ -361,7 +361,7 @@ internal void resolve_look_at_init(void) {
U4 const r_scratch_6c = R_ResolveScratch;
U4 const r_off_ptr_6c = R_T1; /* &scratch.eye (= off dst) */
U4 const r_tmp0_6c = R_T2;
smem.resolve_look_at_atom_addrs[8] = resolve_look_at__trans_matrix_proc(& ab,
smem.resolve_look_at_atom_addrs[9] = resolve_look_at__trans_matrix_proc(& ab,
r_look_at_6c, r_scratch_6c, r_off_ptr_6c, r_tmp0_6c);
/* Sanity check: arena didn't overflow. */
@@ -386,43 +386,30 @@ I_ void resolve_look_at(
, P3_S4* target
, V3_S4* up_in
){
// tb_emit_bundle(tb, slice_from_array(MipsAtom, smem.resolve_look_at_atom_addrs));
/* Atom 0: input_and_sub — stages eye/up_in into scratchpad + computes fwd. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[0]); {
tb_data(tb, u4_(target)); /* Binds_ResolveLookAtSub.target (C-side P3_S4*) */
tb_data(tb, u4_(eye)); /* Binds_ResolveLookAtSub.eye (C-side P3_S4*) */
tb_data(tb, u4_(up_in)); /* Binds_ResolveLookAtSub.up_in (C-side V3_S4*) */
tb_data(tb, u4_(smem.scratchpad)); /* Binds_ResolveLookAtScratch.scratch_base */
tb_data(tb, u4_(target));
tb_data(tb, u4_(eye));
tb_data(tb, u4_(up_in));
tb_data(tb, u4_(smem.scratchpad));
}
/* Atoms 1 + 2: enabled. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[1]); { }
tb_emit(tb, smem.resolve_look_at_atom_addrs[2]); { }
tb_emit(tb, smem.resolve_look_at_atom_addrs[3]); { }
tb_emit(tb, smem.resolve_look_at_atom_addrs[4]); { }
tb_emit(tb, smem.resolve_look_at_atom_addrs[5]); { }
/* Atom 6a: populate — pop look_at* for the matrix destination. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[6]); {
tb_data(tb, u4_(look_at)); /* Binds_ResolveLookAtPopAndTrans.look_at (MT3_S2S4*) */
tb_data(tb, u4_(look_at));
}
/* Atom 6a.5: load_rt — pop look_at* again, ctc2 look_at->m[][] into GTE
* C2[0..4]. Pattern identical to set_gte_mt3s2s4 (proven correct for
* cube rendering via RTPT/RTPS). The mac_yield between atoms gives
* the GTE pipeline time to fully retire the ctc2s. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[9]); {
tb_data(tb, u4_(look_at)); /* Binds_ResolveLookAtPopAndTrans.look_at (MT3_S2S4*) */
}
/* Atom 6b: matrix_vector — pops look_at* for mac_apply_matrix_lv (which loads
* the RT matrix from it). Reads eye from scratch, packs pos as SVECTOR,
* lwc2 into V0, RTPS (sf=1, v=0, cv=3, mx=0), stores MAC1/2/3 → scratch+96. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[7]); {
tb_data(tb, u4_(look_at)); /* Binds_ResolveLookAtPopAndTrans.look_at (MT3_S2S4*) */
tb_data(tb, u4_(look_at));
}
/* Atom 6c: trans_matrix — pop look_at* for the matrix destination. */
tb_emit(tb, smem.resolve_look_at_atom_addrs[8]); {
tb_data(tb, u4_(look_at)); /* Binds_ResolveLookAtPopAndTrans.look_at (MT3_S2S4*) */
tb_data(tb, u4_(look_at));
}
tb_emit(tb, smem.resolve_look_at_atom_addrs[9]); {
tb_data(tb, u4_(look_at));
}
}
@@ -485,26 +472,6 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
tb.used = 0; tb_scope_run(& tb) {
resolve_look_at(& tb, & smem.cam.look_at, & smem.cam.pos, & smem.cube.pos, & v3s4(0, -fp_one, 0));
}
V3_S4 right, up, forward;
V3_S4 ux, uy, uz;
V3_S4 pos, off;
ResolveLookAtScratch_V scratch = C_scratch(ResolveLookAtScratch_V);
/* Atoms 0-5 emit into scratch; bundle dispatch for atom 6 is still
* commented at the resolve_look_at_init helper. Until atom 6 is
* enabled, populate look_at.m[][] from the wave-context outputs. */
forward = scratch->fwd;
uz = scratch->uz;
right = scratch->right;
ux = scratch->ux;
up = scratch->up;
uy = scratch->uy;
// pos = smem.cam.pos; mul_v3s4(& pos, v3s4(-1,-1,-1));
// mul_m3s2_v3s4(& smem.cam.look_at, & pos, & off);
// trans_m3s2( & smem.cam.look_at, & off);
}
// Draw cube
@@ -620,7 +587,7 @@ int main(void)
Ent_Cube* cube = & smem.cube;
cube->rot = v3s2(0, 0, 0);
cube->scale = v3s4_fp_one();
cube->accel = v3s4(0, 0, 0);
cube->accel = v3s4(0, 1, 0);
cube->pos = v3s4(0, -400, 1800);
}
ent_floor_init(& smem.floor.verts, & smem.floor.faces); {