stew

commit ef8862aa5d5a5a64cb174e74109885f6e961e912
parent 5a6c93269636558e5ac824a2b9897df3158a9d26
Author: glenda <glenda@kobeni>
Date:   Mon,  8 Jan 2024 20:32:46 +0000

src/noise: add circle scene

Diffstat:
A
src/noise/circle.c
 | 
51
+++++++++++++++++++++++++++++++++++++++++++++++++++
M
src/noise/config.h
 | 
4
+++-
M
src/noise/main.c
 | 
4
----

3 files changed, 54 insertions(+), 5 deletions(-)
diff --git a/src/noise/circle.c b/src/noise/circle.c
@@ -0,0 +1,51 @@
+/* a scene with circle drawn by fillellipse(2) func */
+
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+#include "noise.h"
+
+#include "circle.h"
+
+struct Circle_State {
+	Point c;
+	int r, dr;
+	Image *bg, *fill;
+	long t, nt;
+} css;
+
+void cs_init(void *)
+{
+	css.dr = 50;
+	css.r = 50;
+	css.bg = display->black;
+	css.fill = display->white;
+	css.t = 0;
+}
+
+void cs_draw(void *)
+{
+	css.c = addpt(Pt(css.r, css.r), screen->r.min);
+	draw(screen, screen->r, css.bg, nil, ZP);
+	fillellipse(screen, css.c, css.r, css.r, css.fill, ZP);
+	css.nt = time(nil);
+	
+	if (css.nt - css.t > 2) {
+		css.t = css.nt;
+		css.r += css.dr;
+		if (css.r > 500) css.r = 50;
+	}
+}
+
+void cs_stop(void *)
+{
+
+}
+
+Scene CircleScene = {
+	"a circle",
+	cs_init,
+	cs_draw,
+	cs_stop,
+	nil};
diff --git a/src/noise/config.h b/src/noise/config.h
@@ -1,8 +1,10 @@
 #include "dnoise.h"
 #include "blank.h"
+#include "circle.h"
 
 Scene *plist[] = {
-	&BlankScene,
 	&DNoiseScene,
+	&CircleScene,
+	&BlankScene,
 	nil,
 };
diff --git a/src/noise/main.c b/src/noise/main.c
@@ -9,10 +9,6 @@
 
 #include "config.h"
 
-enum {
-	PlSize = sizeof(plist) / sizeof(Scene *),
-};
-
 Scene *cs;
 
 struct FPSWidget {