mirror of https://github.com/nmlgc/ReC98.git
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
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#include "th04/player/shot.hpp"
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// Shot types
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#define ST_NORMAL 0
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#define ST_HOMING 1
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#define ST_MISSILE_LEFT 2
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#define ST_MISSILE_RIGHT 3
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#define ST_MISSILE_STRAIGHT 4
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// Shot cycle bitflags
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#define SC_1X 0x8 // Triggered 1× per cycle
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#define SC_2X 0x2 // Triggered 2× per cycle
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#define SC_3X 0x1 // Triggered 3× per cycle
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#define SC_6X 0x4 // Triggered 6× per cycle
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// Returns the current shot cycle, and prepares everything for more shots
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// being added.
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char pascal near shot_cycle_init(void);
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// Common per-iteration data for shot type control functions.
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// (Yeah, code generation mandated additions to [i] to be wrapped into
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// functions, so why not bundle all of the rather intricate shot handling
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// stuff as well.)
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struct ShotAddIterator {
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unsigned char angle;
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unsigned char i;
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ShotAddIterator(unsigned char count)
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: i(count) {
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}
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void add_secondary(unsigned char n) {
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i += n;
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}
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unsigned char next(void) {
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return i -= 1;
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}
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};
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// Requires [cycle] to be defined in some way. (It's _AL in the original game,
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// and I didn't want to pollute the namespace)
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#define SHOT_FUNC_INIT(count, primary_cycle, secondary_cycle, secondary_offset_expr) \
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shot_t near *shot; \
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ShotAddIterator sai(count); \
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\
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cycle = shot_cycle_init(); \
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if((cycle & (primary_cycle | secondary_cycle)) == 0) { \
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return; \
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} \
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if(cycle & secondary_cycle) { \
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sai.secondary_offset_expr; \
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}
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// -----
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// We *really* want to fit those on a line...
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#define OPT_L shot->from_option_l()
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#define OPT_R shot->from_option_r()
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#define MISSILE_L shot->type = ST_MISSILE_LEFT
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#define MISSILE_R shot->type = ST_MISSILE_RIGHT
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#define MISSILE_S shot->type = ST_MISSILE_STRAIGHT
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#define VELOCITY_X(screen_x) shot->pos.velocity.x = screen_x;
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#define VELOCITY_Y(screen_y) shot->pos.velocity.y = screen_y;
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#define VELOCITY_XY(screen_x, screen_y) \
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VELOCITY_X(screen_x); \
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VELOCITY_Y(screen_y);
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#define VELOCITY_YX(screen_y, screen_x) \
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VELOCITY_Y(screen_y); \
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VELOCITY_X(screen_x);
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