def main(width, height):
pygame.init()
pygame.display.gl_set_attribute(pygame.GL_STENCIL_SIZE, 2)
srf = pygame.display.set_mode((width, height), pygame.OPENGL | pygame.DOUBLEBUF)
pygame.display.set_caption("Interpolation test")
VG.create_context((width, height))
VG.set(VG_CLEAR_COLOR, (1.0, 1.0, 1.0, 1.0))
paths = []
path_tag = ".//{http://www.w3.org/2000/svg}path"
VG.set(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE)
VG.scale(5.0, 5.0)
doc = parse_svg("data/svg/shapes.svg")
for element in doc.findall(path_tag):
path = element.path.transform()
path.style = element.style
if not path.style:
path.style = VG.Style(VG_STROKE_LINE_WIDTH=5.0)
else:
path.style[VG_STROKE_LINE_WIDTH] *= 2
paths.append(path)
VG.load_identity()
morph = VG.Path()
start = paths[0]
end = paths[1]
morph.style = start.style
VG.set(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE)
VG.translate(220, 140)
clock = pygame.time.Clock()
running = True
dt = 0
i = 0
while running:
events = pygame.event.get()
for e in events:
if e.type == pygame.QUIT:
running = False
elif e.type == pygame.KEYDOWN:
if e.key == pygame.K_ESCAPE:
running = False
VG.clear((0, 0), (width, height))
morph.clear()
VG.interpolate(start, end, morph, dt/float(MORPH_TIME))
morph.draw(VG_STROKE_PATH)
pygame.display.flip()
dt += clock.tick(60)
if dt >= MORPH_TIME:
dt -= MORPH_TIME
i += 1
start = paths[i % len(paths)]
end = paths[(i+1) % len(paths)]
morph.style = start.style
