ref: 671c2cac38ffada7f9185b87ec27b84566db8c2b
parent: 423e5319e3d3501637fffb11bb5c0acd48c2f424
author: rodri <rgl@antares-labs.eu>
date: Fri Nov 15 11:41:59 EST 2024
forgot the vfx units…
--- /dev/null
+++ b/sprite.c
@@ -1,0 +1,122 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <geometry.h>
+#include "dat.h"
+#include "fns.h"
+
+static void
+sprite_step(Sprite *spr, ulong Δt)
+{+ if(spr->nframes < 2)
+ return;
+
+ spr->elapsed += Δt;
+
+ if(spr->elapsed >= spr->period){+ spr->elapsed -= spr->period;
+ spr->curframe = ++spr->curframe % spr->nframes;
+ }
+}
+
+static void
+sprite_draw(Sprite *spr, Image *dst, Point dp)
+{+ Point sp = (Point){+ spr->curframe * Dx(spr->r),
+ 0
+ };
+ sp = addpt(spr->sp, sp);
+
+ draw(dst, rectaddpt(spr->r, dp), spr->sheet, nil, sp);
+}
+
+static Sprite *
+sprite_clone(Sprite *spr)
+{+ return newsprite(spr->sheet, spr->sp, spr->r, spr->nframes, spr->period);
+}
+
+Sprite *
+newsprite(Image *sheet, Point sp, Rectangle r, int nframes, ulong period)
+{+ Sprite *spr;
+
+ spr = emalloc(sizeof(Sprite));
+ spr->sheet = sheet;
+ spr->sp = sp;
+ spr->r = r;
+ spr->nframes = nframes;
+ spr->curframe = 0;
+ spr->period = period;
+ spr->elapsed = 0;
+ spr->step = sprite_step;
+ spr->draw = sprite_draw;
+ spr->clone = sprite_clone;
+
+ return spr;
+}
+
+Sprite *
+readsprite(char *sheetfile, Point sp, Rectangle r, int nframes, ulong period)
+{+ Image *sheet;
+ int fd;
+
+ fd = open(sheetfile, OREAD);
+ if(fd < 0)
+ sysfatal("readsprite: %r");+ sheet = readimage(display, fd, 1);
+ close(fd);
+
+ return newsprite(sheet, sp, r, nframes, period);
+}
+
+static void
+decproc(void *arg)
+{+ int fd, *pfd;
+
+ pfd = arg;
+ fd = pfd[2];
+
+ close(pfd[0]);
+ dup(fd, 0);
+ close(fd);
+ dup(pfd[1], 1);
+ close(pfd[1]);
+
+ execl("/bin/png", "png", "-t9", nil);+ threadexitsall("execl: %r");+}
+
+Sprite *
+readpngsprite(char *sheetfile, Point sp, Rectangle r, int nframes, ulong period)
+{+ Image *sheet;
+ int fd, pfd[3];
+
+ if(pipe(pfd) < 0)
+ sysfatal("pipe: %r");+ fd = open(sheetfile, OREAD);
+ if(fd < 0)
+ sysfatal("readpngsprite: %r");+ pfd[2] = fd;
+ procrfork(decproc, pfd, mainstacksize, RFFDG|RFNAMEG|RFNOTEG);
+ close(pfd[1]);
+ sheet = readimage(display, pfd[0], 1);
+ close(pfd[0]);
+ close(fd);
+
+ return newsprite(sheet, sp, r, nframes, period);
+}
+
+void
+delsprite(Sprite *spr)
+{+ //freeimage(spr->sheet);
+ free(spr);
+}
--- /dev/null
+++ b/vfx.c
@@ -1,0 +1,71 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <geometry.h>
+#include "dat.h"
+#include "fns.h"
+
+static void
+vfx_step(Vfx *v, ulong Δt)
+{+ if(v->times == 0 && v->a->curframe == 0){+ delvfx(v);
+ return;
+ }
+
+ v->a->step(v->a, Δt);
+
+ if(v->times > 0 && v->a->curframe == v->a->nframes-1)
+ v->times--;
+}
+
+static void
+vfx_draw(Vfx *v, Image *dst)
+{+ if(v->times == 0 && v->a->curframe == 0)
+ return;
+
+ v->a->draw(v->a, dst, subpt(v->p, divpt(subpt(v->a->r.max, v->a->r.min), 2)));
+}
+
+Vfx *
+newvfx(Sprite *spr, Point dp, int repeat)
+{+ Vfx *v;
+
+ v = emalloc(sizeof(Vfx));
+ v->a = spr;
+ v->p = dp;
+ v->times = repeat;
+ v->step = vfx_step;
+ v->draw = vfx_draw;
+
+ return v;
+}
+
+void
+delvfx(Vfx *v)
+{+ v->next->prev = v->prev;
+ v->prev->next = v->next;
+ delsprite(v->a);
+ free(v);
+}
+
+void
+addvfx(Vfx *v, Vfx *nv)
+{+ nv->prev = v->prev;
+ nv->next = v;
+ v->prev->next = nv;
+ v->prev = nv;
+}
+
+void
+initvfxq(Vfx *v)
+{+ v->next = v->prev = v;
+}