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re-nabled culling, remove some magic numbers, do the mvt in c fo rnow

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Edward R. Gonzalez
2026-06-14 20:47:10 -04:00
parent 47806e3d21
commit e7d0b7a4b3
3 changed files with 15 additions and 7 deletions
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code/duffle/gte.h
+5 -3
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@@ -647,6 +647,8 @@ enum {
asm_clobber: clb_system, rlit(R_T4_Code), rlit(R_T5_Code), rlit(R_T6_Code) \
)
// TODO(Ed): Resolve magic number.
/* PsyQ Compliant AVSZ3 Command Word */
#define gte_cmdw_avsz3 (gte_cmd_base | 0x0158002D)
/* PsyQ compatibility bits for AVSZ3 (Bits 20, 22, 24 must be set) */
#define gte_cmdw_psyq_avsz3_compat (0x15 << 20)
#define gte_cmd_avsz3 0x2D
#define gte_cmdw_avsz3 (gte_cmd_base | enc_gte_cmd(gte_cmd_avsz3) | gte_cmdw_psyq_avsz3_compat)
code/duffle/lottes_tape.h
+4 -4
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@@ -99,11 +99,11 @@ internal Code CodeBlob_(atom_floor_tri) {
nop, nop, /* Wait for NCLIP to finish */
/* 4. Check NCLIP.
Temporarily disabled backface culling to ensure floor is visible regardless of winding!
To re-enable: replace the two nops below with `branch_le_zero(R_T0, 30)` */
If MAC0 <= 0 (Backface), branch to end.
Target is 29 instructions past the delay slot. */
gte_mf(R_T0, C2_MAC0),
nop, /* <--- FILL LOAD DELAY SLOT */
nop, /* branch_le_zero(R_T0, 30), <-- CULLING DISABLED */
branch_le_zero(R_T0, 29), /* <--- CULLING RE-ENABLED */
nop, /* <--- DELAY SLOT (Index 0) */
/* 5. Store Primitive Data */
@@ -131,7 +131,7 @@ internal Code CodeBlob_(atom_floor_tri) {
/* CORRECTED DMA TAG LOGIC */
/* 18 (1) */ shift_ll( R_T1, R_T1, 2),
/* 19 (2) */ add_u( R_T1, R_T1, R_T6), /* T1 = &OrderingTable[OTZ] */
/* 19 (2) */ add_u( R_T1, R_T1, R_T6), /* T1 = & OrderingTable[OTZ] */
/* 20 (3) */ load_word( R_AT, R_T1, 0), /* AT = current head (old_ot) */
/* 21 (4) */ load_ui( R_V0, 0x0400), /* V0 = 0x04000000 (Length = 4) */
code/gte_hello/hello_gte.c
+6
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@@ -288,6 +288,12 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
// Draw floor tape method
if (1)
{
m3s2_rotation (& static_mem.floor.rot, & static_mem.tform_world);
m3s2_translation(& static_mem.tform_world, & static_mem.floor.pos);
m3s2_scale (& static_mem.tform_world, & static_mem.floor.scale);
gte_matrix_set_rotation (& static_mem.tform_world);
gte_matrix_set_translation(& static_mem.tform_world);
LP_ U4 mem_temp_tape[512]; // Buffer for function addresses
FArena tape_arena; farena_init(&tape_arena, slice_ut(mem_temp_tape, S_(mem_temp_tape)));