mirror of https://github.com/nmlgc/ReC98.git
108 lines
2.0 KiB
NASM
108 lines
2.0 KiB
NASM
public SPARKS_ADD_RANDOM
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sparks_add_random proc far
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@@count = word ptr 6
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@@distance = word ptr 8
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@@center_y = word ptr 0Ah
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@@center_x = word ptr 0Ch
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push bp
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mov bp, sp
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cmp [bp+@@center_x], (PLAYFIELD_W shl 4)
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ja short @@ret
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cmp [bp+@@center_y], (PLAYFIELD_H shl 4)
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ja short @@ret
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push si
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push di
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mov di, [bp+@@count]
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@@loop:
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mov si, _spark_next_free_offset
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add si, offset _sparks
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cmp [si+spark_t.flag], 0
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jnz short @@wrap_offset?
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mov word ptr [si+spark_t.flag], 1
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mov ax, [bp+@@center_x]
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mov [si+spark_t.pos.cur.x], ax
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mov ax, [bp+@@center_y]
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mov [si+spark_t.pos.cur.y], ax
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call randring2_next16_and pascal, ((2 shl 4) - 1)
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add ax, [bp+@@distance]
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lea bx, [si+spark_t.pos.velocity]
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call vector2_near pascal, bx, [si+spark_t.SPARK_ANGLE], ax
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@@wrap_offset?:
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add _spark_next_free_offset, size spark_t
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cmp _spark_next_free_offset, SPARK_COUNT * size spark_t
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jb short @@more?
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mov _spark_next_free_offset, 0
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@@more?:
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dec di
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jnz short @@loop
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pop di
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pop si
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@@ret:
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pop bp
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retf 8
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sparks_add_random endp
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public SPARKS_ADD_CIRCLE
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sparks_add_circle proc near
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@@count = word ptr 4
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@@distance = word ptr 6
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@@center_y = word ptr 8
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@@center_x = word ptr 0Ah
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push bp
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mov bp, sp
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cmp [bp+@@center_x], (PLAYFIELD_W shl 4)
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ja short @@ret
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cmp [bp+@@center_y], (PLAYFIELD_H shl 4)
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ja short @@ret
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push si
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push di
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mov di, [bp+@@count]
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shl di, 8
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@@loop:
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mov si, _spark_next_free_offset
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add si, offset _sparks
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cmp [si+spark_t.flag], 0
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jnz short @@wrap_offset?
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mov word ptr [si+spark_t.flag], 1
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mov ax, [bp+@@center_x]
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mov [si+spark_t.pos.cur.x], ax
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mov ax, [bp+@@center_y]
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mov [si+spark_t.pos.cur.y], ax
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lea ax, [si+spark_t.pos.velocity]
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push ax
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xor dx, dx
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mov ax, di
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div [bp+@@count]
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xor ah, ah
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push ax
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push [bp+@@distance]
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call vector2_near
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@@wrap_offset?:
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add _spark_next_free_offset, size spark_t
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cmp _spark_next_free_offset, SPARK_COUNT * size spark_t
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jb short @more?
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mov _spark_next_free_offset, 0
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@more?:
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sub di, 256
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jnz short @@loop
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pop di
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pop si
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@@ret:
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pop bp
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retn 8
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sparks_add_circle endp
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nop
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