mirror of
https://github.com/notwa/mm
synced 2024-06-18 09:23:06 -07:00
85 lines
2.1 KiB
NASM
85 lines
2.1 KiB
NASM
[actor_spawn]: 0x80025110
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[object_spawn]: 0x800812F0
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[max_actor_no]: 0x1D6
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[global_context]: 0x801C84A0
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[buttons_offset]: 0x14
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[actor_spawn_offset]: 0x1C24
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[object_spawn_offset]: 0x117A4
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[link_actor]: 0x801DAA30
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[actor_x]: 0x24
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[actor_y]: 0x28
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[actor_z]: 0x2C
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[actor_horiz_angle]: 0x46
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[link_save]: 0x8011A5D0
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[rupees_offset]: 0x34
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[upgrades_offset]: 0xA0
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[upgrades_2_offset]: 0xA2
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.include "spawn.asm"
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actor_object_table:
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.include "actor object table oot.asm"
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load_object:
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// args: a0 (actor number)
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// returns v0 (0 if ok, 1 on error)
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push 4, s0, ra
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li v0, 1
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la t0, actor_object_table
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sll t1, a0, 1
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addu t0, t0, t1
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lhu s0, 0(t0) // object number
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beq s0, r0, load_object_return
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nop
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bal is_object_loaded
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mov a0, s0
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bne v0, r0, load_object_return
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cl v0
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li t8, @global_context
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li t9, @object_spawn_offset
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add a0, t8, t9
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mov a1, s0
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jal @object_spawn
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nop
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load_object_return:
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jpop 4, s0, ra
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/*
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we'll be dealing with structs like
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typedef struct {
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uint_ptr region_start; // ?
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uint_ptr region_end; // ?
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byte loaded_count; // only set in first item
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byte loaded_count_alt; // usually fewer than the above
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uint16 unknown;
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uint16 object_number;
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uint16 padding;
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uint_ptr start;
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uint32 size;
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uint32 unknowns[11]; // more pointers and sizes
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} loaded_object; // total size: 68 bytes
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*/
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is_object_loaded:
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// args: a0 (object number)
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// returns v0 (1 if loaded, 0 if not)
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push 4
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li t8, @global_context
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li t9, @object_spawn_offset
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add t0, t8, t9 // current item
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lb t1, 8(t0) // remaining items
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li v0, 1
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is_object_loaded_loop:
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lh t2, 12(t0) // item's object number
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beq a0, t2, is_object_loaded_return
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subi t1, t1, 1 // TODO: double check there's no off-by-one error
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addi t0, t0, 68
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bne t1, r0, is_object_loaded_loop
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nop
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cl v0
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is_object_loaded_return:
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jpop 4
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