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paint: add script_draw_particles

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luboslenco
2026-07-05 11:18:38 +02:00
parent 80d6a704b7
commit 2a2b6dc238
2 changed files with 52 additions and 4 deletions
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paint/sources/minic_api.c
+2
View File
@@ -87,6 +87,7 @@ void script_timer(f32 delay, void *fn);
char *script_get_stage();
void script_set_tilesheet_anim(object_t *o, char *anim);
object_t *script_get_object(char *s);
void script_draw_particles(gpu_texture_t *texture, float x, float y, float w, float h, int atlas_x, int atlas_frames);
static const char *minic_read_str(minic_val_t v) {
if (v.type == MINIC_T_PTR && v.p != NULL) {
@@ -1213,6 +1214,7 @@ void minic_register_builtins() {
R(script_timer, "v(f,p)");
R(script_get_stage, "p()");
R(script_set_tilesheet_anim, "v(p,p)");
R(script_draw_particles, "v(p,f,f,f,f,i,i)");
R(context_set_viewport_shader, "v(p)");
R(context_set_viewport_mode, "v(i)");
R(context_set_camera_controls, "v(i)");
paint/sources/util/util_script.c
+50 -4
View File
@@ -277,15 +277,16 @@ static void script_fade_draw(void *_) {
draw_end();
}
static void script_fade_out_done(void *_) {
static void script_fade_in_done(void *_) {
sys_remove_update(script_fade_draw);
gc_unroot(_script_fade_stage);
_script_fade_stage = NULL;
}
static void script_fade_in_done(void *_) {
static void script_fade_out_done(void *_) {
script_set_stage(_script_fade_stage);
tween_to(GC_ALLOC_INIT(tween_anim_t, {.target = &_script_fade_opacity, .to = 0.0f, .duration = 1.0f, .ease = EASE_LINEAR, .done = script_fade_out_done}));
tween_reset();
tween_to(GC_ALLOC_INIT(tween_anim_t, {.target = &_script_fade_opacity, .to = 0.0f, .duration = 1.0f, .ease = EASE_LINEAR, .done = script_fade_in_done}));
}
void script_fade_to_stage(char *stage) {
@@ -299,5 +300,50 @@ void script_fade_to_stage(char *stage) {
sys_notify_on_update(script_fade_draw, NULL);
// Fade to black, set the stage, then fade back in
tween_to(GC_ALLOC_INIT(tween_anim_t, {.target = &_script_fade_opacity, .to = 1.0f, .duration = 1.0f, .ease = EASE_LINEAR, .done = script_fade_in_done}));
tween_to(GC_ALLOC_INIT(tween_anim_t, {.target = &_script_fade_opacity, .to = 1.0f, .duration = 1.0f, .ease = EASE_LINEAR, .done = script_fade_out_done}));
}
typedef struct particle {
float frame;
float x;
float y;
float vx;
float vy;
float sc;
float sca;
int flag;
} particle_t;
#define NUM_PARTICLES 512
static particle_t particles[NUM_PARTICLES];
void script_draw_particles(gpu_texture_t *texture, float x, float y, float w, float h, int atlas_x, int atlas_frames) {
float screen_w = iron_window_width();
float screen_h = iron_window_height();
float cell_w = texture->width / atlas_x;
for (int i = 0; i < NUM_PARTICLES; ++i) {
particle_t *p = &particles[i];
if ((p->vx == 0 && p->vy == 0) || (p->x > screen_w || p->y > screen_h)) {
p->x = iron_random_get_in(-screen_w / 3.0, screen_w);
p->y = iron_random_get_in(-screen_w / 3.0, -cell_w);
p->vx = iron_random_get_in(0, 200) / 100.0;
p->vy = iron_random_get_in(0, 200) / 100.0;
p->frame = iron_random_get_in(0, atlas_frames - 1);
p->sc = iron_random_get_in(0, 100) / 100.0;
p->sca = iron_random_get_in(0, 100) / 100.0;
}
p->frame += 0.5 * p->vy;
if (p->frame >= atlas_frames)
p->frame = 0;
int frame_x = (int)p->frame % atlas_x;
int frame_y = (int)p->frame / atlas_x;
p->x += p->vx;
p->y += p->vy;
int col = ((int)(255 * p->sca) << 24) | (255 << 16) | (255 << 8) | 255;
draw_set_color(col);
draw_sub_image(texture, frame_x * cell_w, frame_y * cell_w, cell_w, cell_w, p->x, p->y);
}
}