Commit 08d8c68b authored by Kristian Høgsberg's avatar Kristian Høgsberg

Add spring-tool, a small utility to plot spring behavior

The weston_spring is a very flexible and powerful mecanhism for driving
animations.  However, it can be a little difficult to tame, but this
little helper can plot the response of the spring to a set of initial
parameters and makes it easy to tune and tweak the spring behavior.
parent 0bd587e6
......@@ -280,6 +280,17 @@ cms_colord_la_SOURCES = \
endif
endif
noinst_PROGRAMS = spring-tool
spring_tool_CFLAGS = $(GCC_CFLAGS) $(COMPOSITOR_CFLAGS)
spring_tool_LDADD = $(COMPOSITOR_LIBS) -lm
spring_tool_SOURCES = \
spring-tool.c \
animation.c \
../shared/matrix.c \
../shared/matrix.h \
compositor.h
BUILT_SOURCES = \
screenshooter-server-protocol.h \
screenshooter-protocol.c \
......
/*
* Copyright © 2011 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "compositor.h"
WL_EXPORT void
weston_surface_geometry_dirty(struct weston_surface *surface)
{
}
WL_EXPORT int
weston_log(const char *fmt, ...)
{
return 0;
}
WL_EXPORT void
weston_compositor_schedule_repaint(struct weston_compositor *compositor)
{
}
int
main(int argc, char *argv[])
{
const double k = 300.0;
const double current = 0.0;
const double target = 1.0;
const double friction = 1400;
struct weston_spring spring;
uint32_t time = 0;
weston_spring_init(&spring, k, current, target);
spring.friction = friction;
spring.previous = -0.03;
spring.timestamp = 0;
while (!weston_spring_done(&spring)) {
printf("\t%d\t%f\n", time, spring.current);
weston_spring_update(&spring, time);
time += 16;
}
return 0;
}
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