Python Transform.scale方法代码示例

# 需要导入模块: from nodebox.graphics import Transform [as 别名]
# 或者: from nodebox.graphics.Transform import scale [as 别名]
def copy(shape, copies, transform_order='tsr', translate=Point.ZERO, rotate=0, scale=Point.ZERO):
    """Create multiple copies of a shape."""
    if shape is None: return None
    if isinstance(shape, Path):
        shape = shape.asGeometry()
    g = Geometry()
    tx = ty = r = 0.0
    sx = sy = 1.0
    for i in xrange(copies):
        t = Transform()
        # Each letter of the order describes an operation.
        for op in transform_order:
            if op == 't':
                t.translate(tx, ty)
            elif op == 'r':
                t.rotate(r)
            elif op == 's':
                t.scale(sx, sy)
        g.extend(t.map(shape))
        tx += translate.x
        ty += translate.y
        r += rotate
        sx += scale.x / 100.0
        sy += scale.y / 100.0
    return g

# 需要导入模块: from nodebox.graphics import Transform [as 别名]
# 或者: from nodebox.graphics.Transform import scale [as 别名]
def fit(shape, position, width, height, keep_proportions):
    """Fit a shape within bounds."""
    if shape is None: return None

    px, py, pw, ph = list(shape.bounds)

    # Make sure pw and ph aren't infinitely small numbers.
    # This will lead to incorrect transformations with for examples lines.
    if 0 < pw <= 0.000000000001: pw = 0
    if 0 < ph <= 0.000000000001: ph = 0

    t = Transform()
    t.translate(position.x, position.y)
    if keep_proportions:
        # Don't scale widths or heights that are equal to zero.
        w = pw and width / pw or float("inf")
        h = ph and height / ph or float("inf")
        w = h = min(w, h)
    else:
        # Don't scale widths or heights that are equal to zero.
        w = pw and width / pw or 1
        h = ph and height / ph or 1
    t.scale(w, h)
    t.translate(-pw / 2 - px, -ph / 2 - py)

    return t.map(shape)

# 需要导入模块: from nodebox.graphics import Transform [as 别名]
# 或者: from nodebox.graphics.Transform import scale [as 别名]
def scale(shape, scale, origin=Point.ZERO):
    """Scale the given shape."""
    if shape is None: return None
    t = Transform()
    t.translate(origin)
    t.scale(scale.x / 100.0, scale.y / 100.0)
    t.translate(Point(-origin.x, -origin.y))
    return t.map(shape)

# 需要导入模块: from nodebox.graphics import Transform [as 别名]
# 或者: from nodebox.graphics.Transform import scale [as 别名]
def l_system(shape, position, generations, length, length_scale, angle, angle_scale, thickness_scale, premise, *rules):
    if shape is None:
        p = Path()
        p.rect(0, -length/2, 2, length)
        shape = p.asGeometry()
    # Parse all rules
    rule_map = {}
    for rule_index, full_rule in enumerate(rules):
        if len(full_rule) > 0:
            if len(full_rule) < 3 or full_rule[1] != '=':
                raise ValueError("Rule %s should be in the format A=FFF" % (rule_index + 1))
            rule_key = full_rule[0]
            rule_value = full_rule[2:]
            rule_map[rule_key] = rule_value
    # Expand the rules up to the number of generations
    full_rule = premise
    for gen in xrange(int(round(generations))):
        tmp_rule = ""
        for letter in full_rule:
            if letter in rule_map:
                tmp_rule += rule_map[letter]
            else:
                tmp_rule += letter
        full_rule = tmp_rule
    # Now run the simulation
    g = Geometry()
    stack = []
    angleStack = []
    t = Transform()
    t.translate(position.x, position.y)
    angle = angle
    for letter in full_rule:
        if letter == 'F': # Move forward and draw
            transformed_shape = t.map(shape)
            if isinstance(transformed_shape, Geometry):
                g.extend(transformed_shape)
            elif isinstance(transformed_shape, Path):
                g.add(transformed_shape)
            t.translate(0, -length)
        elif letter == '+': # Rotate right
            t.rotate(angle)
        elif letter == '-': # Rotate left
            t.rotate(-angle)
        elif letter == '[': # Push state (start branch)
            stack.append(Transform(t))
            angleStack.append(angle)
        elif letter == ']': # Pop state (end branch)
            t = stack.pop()
            angle = angleStack.pop()
        elif letter == '"': # Multiply length
            t.scale(1.0, length_scale / 100.0)
        elif letter == '!': # Multiply thickness
            t.scale(thickness_scale / 100.0, 1.0)
        elif letter == ';': # Multiply angle
            angle *= angle_scale / 100.0
        elif letter == '_': # Divide length
            t.scale(1.0, 1.0/(length_scale / 100.0))
        elif letter == '?': # Divide thickness
            t.scale(1.0/(thickness_scale / 100.0), 1.0)
        elif letter == '@': # Divide angle
            angle /= angle_scale / 100.0
    return g