def main():
app = App(mouse=True, framerate=60)
app.mouse_x = 0
app.mouse_y = 0
app.mouse_px = 0
app.mouse_py = 0
app.particles = []
@app.on("mouse")
def on_mouse(m):
app.mouse_x = m.x
app.mouse_y = m.y * 2
@app.on("frame")
def on_frame():
w = app.screen.w
h = app.screen.h
colormap = [Color.rgb(0,0,0) for x in range(w) for y in range(h * 2)]
dx = app.mouse_x - app.mouse_px
dy = app.mouse_y - app.mouse_py
l = math.sqrt(dx ** 2 + dy ** 2)
d = math.atan2(dy, dx)
j = min(25, int(l)) * 6
for i in range(j):
f = i / j
ll = l* random.uniform(0.25, 0.5)
dd = d + random.uniform(-0.25, 0.25)
vx = ll * math.cos(dd)
vy = ll * math.sin(dd)
app.particles.append(Particle(app.mouse_px + dx * f, app.mouse_py + dy * f, vx, vy))
app.screen.clear()
for i, p in enumerate(app.particles):
col = Color.hsl(i/len(app.particles), 1.0, 0.5)
steps = math.hypot(p.vx, p.vy)
for step in range(int(steps + 1)):
f = step / steps
px = int(p.x - p.vx * f)
py = int(p.y - p.vy * f)
if px >= 0 and py >= 0 and px < w and py < h * 2:
colormap[py * w + px] += RED
p.update()
if p.x < 0 or p.y < 0 or p.x >= w or p.y >= h * 2:
app.particles.remove(p)
draw_colormap_2x(app.screen, colormap, 0, 0, w=w, h=h * 2)
app.screen.update()
app.mouse_px = app.mouse_x
app.mouse_py = app.mouse_y
app.run()
def main():
app = App(mouse=True, framerate=60)
app.mouse_x = 0
app.mouse_y = 0
app.mouse_px = 0
app.mouse_py = 0
app.particles = []
@app.on("mouse")
def on_mouse(m):
app.mouse_x = m.x
app.mouse_y = m.y
@app.on("frame")
def on_frame():
dx = app.mouse_x - app.mouse_px
dy = app.mouse_y - app.mouse_py
l = math.sqrt(dx**2 + dy**2)
d = math.atan2(dy, dx)
j = min(45, int(l)) * 2
for i in range(j):
f = i / j
ll = l * random.uniform(0.25, 0.5)
dd = d + random.uniform(-0.2, 0.2)
vx = ll * math.cos(dd)
vy = ll * math.sin(dd)
app.particles.append(
Particle(app.mouse_px + dx * f, app.mouse_py + dy * f, vx, vy))
app.screen.clear()
for i, p in enumerate(app.particles):
col = Color.hsl(i / len(app.particles), 1.0, 0.5)
app.screen.print(" ", int(p.x), int(p.y), bg=col)
p.update()
if p.x < 0 or p.y < 0 or p.x >= app.screen.w or p.y >= app.screen.h:
app.particles.remove(p)
app.screen.update()
app.mouse_px = app.mouse_x
app.mouse_py = app.mouse_y
app.start()
app.await_stop()