compositor: Rename tweener to spring

Because it's a spring model, not a tweener.

compositor/compositor.c

@@ -112,54 +112,54 @@ wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
 }
 
 WL_EXPORT void
-wlsc_tweener_init(struct wlsc_tweener *tweener,
-		  double k, double current, double target)
+wlsc_spring_init(struct wlsc_spring *spring,
+		 double k, double current, double target)
 {
-	tweener->k = k;
-	tweener->friction = 100.0;
-	tweener->current = current;
-	tweener->previous = current;
-	tweener->target = target;
+	spring->k = k;
+	spring->friction = 100.0;
+	spring->current = current;
+	spring->previous = current;
+	spring->target = target;
 }
 
 WL_EXPORT void
-wlsc_tweener_update(struct wlsc_tweener *tweener, uint32_t msec)
+wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec)
 {
 	double force, v, current, step;
 
-	step = (msec - tweener->timestamp) / 500.0;
-	tweener->timestamp = msec;
+	step = (msec - spring->timestamp) / 500.0;
+	spring->timestamp = msec;
 
-	current = tweener->current;
-	v = current - tweener->previous;
-	force = tweener->k * (tweener->target - current) / 10.0 +
-		(tweener->previous - current) - v * tweener->friction;
+	current = spring->current;
+	v = current - spring->previous;
+	force = spring->k * (spring->target - current) / 10.0 +
+		(spring->previous - current) - v * spring->friction;
 
-	tweener->current =
-		current + (current - tweener->previous) + force * step * step;
-	tweener->previous = current;
+	spring->current =
+		current + (current - spring->previous) + force * step * step;
+	spring->previous = current;
 
-	if (tweener->current >= 1.0) {
+	if (spring->current >= 1.0) {
 #ifdef TWEENER_BOUNCE
-		tweener->current = 2.0 - tweener->current;
-		tweener->previous = 2.0 - tweener->previous;
+		spring->current = 2.0 - spring->current;
+		spring->previous = 2.0 - spring->previous;
 #else
-		tweener->current = 1.0;
-		tweener->previous = 1.0;
+		spring->current = 1.0;
+		spring->previous = 1.0;
 #endif
 	}
 
-	if (tweener->current <= 0.0) {
-		tweener->current = 0.0;
-		tweener->previous = 0.0;
+	if (spring->current <= 0.0) {
+		spring->current = 0.0;
+		spring->previous = 0.0;
 	}
 }
 
 WL_EXPORT int
-wlsc_tweener_done(struct wlsc_tweener *tweener)
+wlsc_spring_done(struct wlsc_spring *spring)
 {
-	return fabs(tweener->previous - tweener->target) < 0.0002 &&
-		fabs(tweener->current - tweener->target) < 0.0002;
+	return fabs(spring->previous - spring->target) < 0.0002 &&
+		fabs(spring->current - spring->target) < 0.0002;
 }
 
 WL_EXPORT struct wlsc_surface *
@@ -624,14 +624,14 @@ fade_frame(struct wlsc_animation *animation,
 		container_of(animation,
 			     struct wlsc_compositor, fade.animation);
 
-	wlsc_tweener_update(&compositor->fade.tweener, msecs);
-	if (wlsc_tweener_done(&compositor->fade.tweener)) {
-		if (compositor->fade.tweener.current > 0.999) {
+	wlsc_spring_update(&compositor->fade.spring, msecs);
+	if (wlsc_spring_done(&compositor->fade.spring)) {
+		if (compositor->fade.spring.current > 0.999) {
 			compositor->state = WLSC_COMPOSITOR_SLEEPING;
 			compositor->shell->lock(compositor->shell);
 		}
-		compositor->fade.tweener.current =
-			compositor->fade.tweener.target;
+		compositor->fade.spring.current =
+			compositor->fade.spring.target;
 		wl_list_remove(&animation->link);
 		wl_list_init(&animation->link);
 	}
@@ -701,7 +701,7 @@ wlsc_output_repaint(struct wlsc_output *output)
 	if (ec->focus)
 		if (output->set_hardware_cursor(output, ec->input_device) < 0)
 			using_hardware_cursor = 0;
-	if (ec->fade.tweener.current > 0.001)
+	if (ec->fade.spring.current > 0.001)
 		using_hardware_cursor = 0;
 
 	es = container_of(ec->surface_list.next, struct wlsc_surface, link);
@@ -749,8 +749,8 @@ wlsc_output_repaint(struct wlsc_output *output)
 						  &total_damage);
 		}
 
-	if (ec->fade.tweener.current > 0.001)
-		fade_output(output, ec->fade.tweener.current, &total_damage);
+	if (ec->fade.spring.current > 0.001)
+		fade_output(output, ec->fade.spring.current, &total_damage);
 }
 
 static int
@@ -806,13 +806,13 @@ wlsc_compositor_fade(struct wlsc_compositor *compositor, float tint)
 {
 	int done;
 
-	done = wlsc_tweener_done(&compositor->fade.tweener);
-	compositor->fade.tweener.target = tint;
-	if (wlsc_tweener_done(&compositor->fade.tweener))
+	done = wlsc_spring_done(&compositor->fade.spring);
+	compositor->fade.spring.target = tint;
+	if (wlsc_spring_done(&compositor->fade.spring))
 		return;
 
 	if (done)
-		compositor->fade.tweener.timestamp =
+		compositor->fade.spring.timestamp =
 			wlsc_compositor_get_time();
 
 	wlsc_compositor_damage_all(compositor);
@@ -1836,7 +1836,7 @@ wlsc_compositor_init(struct wlsc_compositor *ec, struct wl_display *display)
 	wl_list_init(&ec->output_list);
 	wl_list_init(&ec->binding_list);
 	wl_list_init(&ec->animation_list);
-	wlsc_tweener_init(&ec->fade.tweener, 0.8, 0.0, 0.0);
+	wlsc_spring_init(&ec->fade.spring, 0.8, 0.0, 0.0);
 	ec->fade.animation.frame = fade_frame;
 	wl_list_init(&ec->fade.animation.link);
 

compositor/compositor.h

@@ -117,7 +117,7 @@ struct wlsc_animation {
 	struct wl_list link;
 };
 
-struct wlsc_tweener {
+struct wlsc_spring {
 	double k;
 	double friction;
 	double current;
@@ -162,7 +162,7 @@ struct wlsc_compositor {
 	struct wl_list binding_list;
 	struct wl_list animation_list;
 	struct {
-		struct wlsc_tweener tweener;
+		struct wlsc_spring spring;
 		struct wlsc_animation animation;
 	} fade;
 
@@ -234,12 +234,12 @@ struct wlsc_surface {
 };
 
 void
-wlsc_tweener_init(struct wlsc_tweener *tweener,
-		  double k, double current, double target);
+wlsc_spring_init(struct wlsc_spring *spring,
+		 double k, double current, double target);
 void
-wlsc_tweener_update(struct wlsc_tweener *tweener, uint32_t msec);
+wlsc_spring_update(struct wlsc_spring *spring, uint32_t msec);
 int
-wlsc_tweener_done(struct wlsc_tweener *tweener);
+wlsc_spring_done(struct wlsc_spring *spring);
 
 void
 wlsc_surface_activate(struct wlsc_surface *surface,

compositor/meego-tablet-shell.c

@@ -77,7 +77,7 @@ struct meego_tablet_client {
 struct meego_tablet_zoom {
 	struct wlsc_surface *surface;
 	struct wlsc_animation animation;
-	struct wlsc_tweener tweener;
+	struct wlsc_spring spring;
 	struct wlsc_transform transform;
 };
 
@@ -104,16 +104,16 @@ meego_tablet_zoom_frame(struct wlsc_animation *animation,
 	struct wlsc_surface *es = zoom->surface;
 	GLfloat scale;
 
-	wlsc_tweener_update(&zoom->tweener, msecs);
+	wlsc_spring_update(&zoom->spring, msecs);
 
-	if (wlsc_tweener_done(&zoom->tweener)) {
+	if (wlsc_spring_done(&zoom->spring)) {
 		wl_list_remove(&animation->link);
 		fprintf(stderr, "animation done\n");
 		es->transform = NULL;
 		free(zoom);
 	}
 
-	scale = zoom->tweener.current;
+	scale = zoom->spring.current;
 	wlsc_matrix_init(&zoom->transform.matrix);
 	wlsc_matrix_translate(&zoom->transform.matrix,
 			      -es->width / 2.0, -es->height / 2.0, 0);
@@ -121,7 +121,7 @@ meego_tablet_zoom_frame(struct wlsc_animation *animation,
 	wlsc_matrix_translate(&zoom->transform.matrix,
 			      es->width / 2.0, es->height / 2.0, 0);
 
-	scale = 1.0 / zoom->tweener.current;
+	scale = 1.0 / zoom->spring.current;
 	wlsc_matrix_init(&zoom->transform.inverse);
 	wlsc_matrix_scale(&zoom->transform.inverse, scale, scale, scale);
 
@@ -144,11 +144,11 @@ meego_tablet_zoom_run(struct meego_tablet_shell *shell,
 	zoom->surface = surface;
 	surface->transform = &zoom->transform;
 	scale = 0.3;
-	wlsc_tweener_init(&zoom->tweener, 100.0, scale, 1.0);
-	zoom->tweener.timestamp = wlsc_compositor_get_time();
+	wlsc_spring_init(&zoom->spring, 100.0, scale, 1.0);
+	zoom->spring.timestamp = wlsc_compositor_get_time();
 	zoom->animation.frame = meego_tablet_zoom_frame;
 	meego_tablet_zoom_frame(&zoom->animation, NULL,
-				zoom->tweener.timestamp);
+				zoom->spring.timestamp);
 
 	wl_list_insert(shell->compositor->animation_list.prev,
 		       &zoom->animation.link);
@@ -559,6 +559,6 @@ shell_init(struct wlsc_compositor *compositor)
 
 	launch_switcher(shell);
 
-	wlsc_tweener_init(&compositor->fade.tweener, 40.0, 1.0, 1.0);
+	wlsc_spring_init(&compositor->fade.spring, 40.0, 1.0, 1.0);
 	shell->starting = 1;
 }