mirror of https://github.com/nmlgc/ReC98.git
172 lines
2.8 KiB
NASM
172 lines
2.8 KiB
NASM
; [center_x] and [center_y] are *passed* in units of 1/16th of a pixel, but
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; stored at pixel precision, as master.lib's grcg_circle() function doesn't
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; support more than that anyway.
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; void pascal circles_add_growing(int center_x, int center_y);
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public _circles_add_growing
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_circles_add_growing proc far
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@@center_y = word ptr 6
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@@center_x = word ptr 8
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push bp
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mov bp, sp
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push si
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mov si, offset _circles
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xor cx, cx
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jmp short @@more?
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@@loop:
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cmp [si+circle_t.flag], 0
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jnz short @@next
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mov [si+circle_t.flag], 1
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mov [si+circle_t.age], 0
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mov ax, [bp+@@center_x]
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mov bx, 16
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cwd
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idiv bx
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add ax, 32
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mov [si+circle_t.center.x], ax
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mov ax, [bp+@@center_y]
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cwd
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idiv bx
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add ax, 16
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mov [si+circle_t.center.y], ax
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mov [si+circle_t.radius_cur], 4
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mov [si+circle_t.radius_delta], 8
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jmp short @@ret
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@@next:
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inc cx
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add si, size circle_t
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@@more?:
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cmp cx, CIRCLE_COUNT
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jl short @@loop
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@@ret:
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pop si
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pop bp
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retf 4
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_circles_add_growing endp
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; void pascal circles_add_shrinking(int center_x, int center_y);
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public _circles_add_shrinking
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_circles_add_shrinking proc far
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@@center_y = word ptr 6
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@@center_x = word ptr 8
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push bp
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mov bp, sp
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push si
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mov si, offset _circles
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xor cx, cx
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jmp short @@more?
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@@loop:
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cmp [si+circle_t.flag], 0
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jnz short @@next
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mov [si+circle_t.flag], 1
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mov [si+circle_t.age], 0
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mov ax, [bp+@@center_x]
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mov bx, 10h
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cwd
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idiv bx
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add ax, 32
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mov [si+circle_t.center.x], ax
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mov ax, [bp+@@center_y]
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cwd
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idiv bx
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add ax, 16
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mov [si+circle_t.center.y], ax
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mov [si+circle_t.radius_cur], 132
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mov [si+circle_t.radius_delta], -8
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jmp short @@ret
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@@next:
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inc cx
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add si, size circle_t
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@@more?:
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cmp cx, CIRCLE_COUNT
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jl short @@loop
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@@ret:
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pop si
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pop bp
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retf 4
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_circles_add_shrinking endp
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; void circles_update(void);
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public _circles_update
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_circles_update proc near
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push bp
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mov bp, sp
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push si
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mov si, offset _circles
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xor dx, dx
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jmp short @@more?
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@@loop:
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cmp [si+circle_t.flag], 2
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jnz short @@alive?
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mov [si+circle_t.flag], 0
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@@alive?:
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cmp [si+circle_t.flag], 1
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jnz short @@next
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mov ax, [si+circle_t.radius_delta]
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add [si+circle_t.radius_cur], ax
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inc [si+circle_t.age]
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cmp [si+circle_t.age], 16
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jbe short @@next
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mov [si+circle_t.flag], 2
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@@next:
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inc dx
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add si, size circle_t
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@@more?:
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cmp dx, CIRCLE_COUNT
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jl short @@loop
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pop si
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pop bp
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retn
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_circles_update endp
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; void circles_render(void);
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public _circles_render
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_circles_render proc near
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push bp
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mov bp, sp
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push si
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push di
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mov ah, _circles_color
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call _grcg_setcolor_direct_noint_1
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mov si, offset _circles
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xor di, di
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jmp short @@more?
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@@loop?:
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cmp [si+circle_t.flag], 1
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jnz short @@next
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push [si+circle_t.center.x]
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push [si+circle_t.center.y]
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push [si+circle_t.radius_cur]
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call grcg_circle
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@@next:
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inc di
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add si, size circle_t
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@@more?:
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cmp di, CIRCLE_COUNT
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jl short @@loop?
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pop di
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pop si
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pop bp
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retn
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_circles_render endp
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