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Completed C-side of: Camera Transformation chapter. Now todo atom tape translation...

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ed
2026-08-08 16:42:07 -04:00
parent 917b764d95
commit 68b87f1c8b
11 changed files with 268 additions and 108 deletions
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code/hello_camera/hello_camera.atom.c
+29 -3
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@@ -210,7 +210,7 @@ enum {
R_CubeRot = R_T1 atom_reg,
R_FloorRot = R_T2 atom_reg,
};
internal MipsAtom_(pad_apply_input) atom_info(atom_bind(Binds_PadApplyInput)
internal MipsAtom_(pad_input_cube_rotation) atom_info(atom_bind(Binds_PadApplyInput)
, atom_reads(R_T0, R_CubeRot, R_FloorRot, R_T3, R_T4, R_PadStateT5, R_TapePtr)
, atom_writes( R_CubeRot, R_FloorRot)
) {
@@ -225,7 +225,7 @@ internal MipsAtom_(pad_apply_input) atom_info(atom_bind(Binds_PadApplyInput)
// Note(Ed): Potential op with delay slot?
/* D-pad Left: cube_rot.y += 30, floor_rot.y += 5. */
and_i(R_T3, R_T0, pad0_(Pad_Left)), branch_le_zero(R_T3, atom_offset(dpad_left, exit_dpad_left)),
and_i(R_T3, R_T0, Pad_Left), branch_le_zero(R_T3, atom_offset(dpad_left, exit_dpad_left)),
load_half( R_T4, R_CubeRot, O_(V3_S2,y)), /* BD-slot */
load_half( R_T3, R_FloorRot, O_(V3_S2,y)),
add_si( R_T4, R_T4, 30),
@@ -235,7 +235,7 @@ internal MipsAtom_(pad_apply_input) atom_info(atom_bind(Binds_PadApplyInput)
atom_label(exit_dpad_left)
/* D-pad Right: cube_rot.y -= 30, floor_rot.y -= 5. */
and_i(R_T3, R_T0, pad0_(Pad_Right)), branch_le_zero(R_T3, atom_offset(dpad_right, exit_dpad_right)),
and_i(R_T3, R_T0, Pad_Right), branch_le_zero(R_T3, atom_offset(dpad_right, exit_dpad_right)),
load_half( R_T4, R_CubeRot, O_(V3_S2,y)), /* BD-slot */
load_half( R_T3, R_FloorRot, O_(V3_S2,y)),
add_si( R_T4, R_T4, -30),
@@ -312,6 +312,32 @@ atom_label(exit_stick)
mac_yield_tail(),
};
enum {
R_Cam = R_T4 atom_reg,
};
typedef Struct_(Binds_PadInputCam) {
Camera* cam;
};
internal MipsAtom_(pad_input_cam) atom_info(atom_bind(Binds_PadInputCam)) {
load_word(R_Cam, R_TapePtr, O_(Binds_PadInputCam,cam)),
add_ui_self( R_TapePtr, S_(Binds_PadInputCam)),
// TODO(Ed): Implement.
mac_yield(),
};
enum {
_LookAt_WIP,
};
typedef Struct_(Binds_ResolveLookAt) {
U1 bla;
};
internal MipsAtom_(resolve_look_at) atom_info(atom_bind(Binds_ResolveLookAt)) {
add_ui_self(R_TapePtr, S_(Binds_ResolveLookAt)),
mac_yield(),
};
enum {
R_PrimCursor = R_T7 atom_reg atom_type(U4*), /* VRAM output cursor (primitive buffer) */
R_FaceCursor = R_T4 atom_reg atom_type(V4_S2*), /* Cube face-index cursor (V4_S2*); floor context switches to V3_S2* via atom_phase */