def paintLine(points, numsteps=None, **kwargs):
'''Paint a line with current brush
::
set_brush("mybrush.png", 10)
paintLine((0, 0, 20, 50))
paintLine((1, 2, 1, 5, 4, 6, 8, 7))
'''
if not __brush_texture:
pymt.pymt_logger.warning('Graphx: No brush set to paint line, abort')
return
if len(points) % 2 == 1:
raise Exception('Points list must be a pair length number (not impair)')
kwargs.setdefault('sfactor', GL_SRC_ALPHA)
kwargs.setdefault('dfactor', GL_ONE_MINUS_SRC_ALPHA)
blending = GlBlending(sfactor=kwargs.get('sfactor'),
dfactor=kwargs.get('dfactor'))
with DO(blending, gx_enable(GL_POINT_SPRITE_ARB),
gx_enable(__brush_texture.target)):
# prepare env
set_texture(__brush_texture.id, target=__brush_texture.target)
glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)
glPointSize(__brush_size)
# initialize outputList
outputList = []
# extract 4 points each 2 points
for x1, y1, x2, y2 in zip(points[::2], points[1::2],
points[2::2], points[3::2]):
# calculate vector and distance
dx, dy = x2 - x1, y2 - y1
dist = sqrt(dx * dx + dy * dy)
# determine step
steps = numsteps
if steps is None:
steps = max(1, int(dist) / 4)
# construct pointList
for i in xrange(steps):
outputList.extend([x1 + dx * (float(i) / steps),
y1 + dy * (float(i) / steps)])
# draw !
if len(outputList) < 2:
return
with gx_begin(GL_POINTS):
for x, y in zip(outputList[::2], outputList[1::2]):
glVertex2f(x, y)
def draw_filled_path(self):
for style, points in self.filled_path:
with gx_begin(style):
for x, y in zip(points[::2], points[1::2]):
glVertex2f(x, y)