mirror of https://github.com/nmlgc/ReC98.git
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* ReC98 / TH05
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* ------------
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* Rendering code for all bosses
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*/
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#include <master.h>
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#include "th01/math/subpixel.hpp"
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#include "th04/math/vector.hpp"
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#include "th04/main/drawp.hpp"
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#include "th04/main/playfld.h"
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/// Structures
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/// ----------
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#define BOSS_PARTICLE_COUNT 64
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#define LINESET_LINE_COUNT 20
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#define LINESET_COUNT 4
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// `boss_` to differentiate this structure from `s2particle_t`, which uses the
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// same sprites.
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struct boss_particle_t {
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SPPoint pos; // [x] == Subpixel::None() indicates a dead particle
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// [pos] is reset to this value once it has left the playfield, restarting
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// the particle movement.
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SPPoint origin;
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SPPoint velocity;
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int age;
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unsigned char angle;
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unsigned char patnum; // if 0, calculated from [age] during rendering
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};
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// Each final rendered line effectively corresponds to the diameter of the
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// described circle, with the two line points at +[angle] and -[angle].
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struct lineset_t {
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SPPoint center[LINESET_LINE_COUNT];
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Subpixel velocity_y;
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Subpixel radius[LINESET_LINE_COUNT];
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unsigned char angle[LINESET_LINE_COUNT];
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};
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extern boss_particle_t boss_particles[BOSS_PARTICLE_COUNT];
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extern lineset_t linesets[LINESET_COUNT];
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/// ----------
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// Draws the given line out of [set] with the current GRCG tile and color.
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void pascal near grcg_lineset_line_put(lineset_t near &set, int i)
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{
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vector2_at(drawpoint,
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set.center[i].x, set.center[i].y, set.radius[i], set.angle[i]
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);
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int x1 = (PLAYFIELD_X + drawpoint.x.to_screen());
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int y1 = (PLAYFIELD_Y + drawpoint.y.to_screen());
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vector2_at(drawpoint,
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set.center[i].x, set.center[i].y, set.radius[i], (set.angle[i] + 0x80)
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);
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int x2 = (PLAYFIELD_X + drawpoint.x.to_screen());
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int y2 = (PLAYFIELD_Y + drawpoint.y.to_screen());
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grcg_line(x1, y1, x2, y2);
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}
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// Copies lines [0; 17] to lines [1..18].
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void pascal near lineset_forward_copy(lineset_t near &set)
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{
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for(int i = (LINESET_LINE_COUNT - 2); i > 0; i--) {
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set.center[i] = set.center[i - 1];
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set.angle[i] = set.angle[i - 1];
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set.radius[i].v = set.radius[i - 1].v;
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}
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}
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