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fire.cc
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fire.cc
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/*
* Copyright (c) 2008-2009, Thomas Jaeger <[email protected]>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, 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 "fire.h"
#include <X11/Xlib.h>
#include <math.h>
#include <stdio.h>
Fire::Fire() {
const char *ofc = "org.freedesktop.compiz";
GError *error = 0;
bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
if (!bus) {
g_error_free(error);
throw DBusException();
}
char add[256];
char clear[256];
snprintf(add, sizeof(add), "/org/freedesktop/compiz/firepaint/screen%d/add_particle", DefaultScreen(dpy));
snprintf(clear, sizeof(clear), "/org/freedesktop/compiz/firepaint/screen%d/clear_key", DefaultScreen(dpy));
point_proxy = dbus_g_proxy_new_for_name(bus, ofc, add, ofc);
clear_proxy = dbus_g_proxy_new_for_name(bus, ofc, clear, ofc);
}
void Fire::add_point(float x, float y) {
dbus_g_proxy_call_no_reply(point_proxy, "activate",
G_TYPE_STRING, "root", G_TYPE_INT, gint(ROOT),
G_TYPE_STRING, "x", G_TYPE_DOUBLE, gdouble(x),
G_TYPE_STRING, "y", G_TYPE_DOUBLE, gdouble(y),
G_TYPE_INVALID);
}
void Fire::draw(Point p, Point q) {
float dist = hypot(p.x-q.x, p.y-q.y);
leftover -= dist;
while (leftover < 0.01) {
add_point(q.x + (q.x-p.x)*leftover/dist, q.y + (q.y-p.y)*leftover/dist);
leftover += 5.0;
}
}
void Fire::timeout() {
dbus_g_proxy_call_no_reply(clear_proxy, "activate",
G_TYPE_STRING, "root", G_TYPE_INT, gint(ROOT),
G_TYPE_INVALID);
}