# Py5Graphics.quadratic_vertex()
Specifies vertex coordinates for quadratic Bezier curves.
## Description
Specifies vertex coordinates for quadratic Bezier curves. Each call to `quadratic_vertex()` defines the position of one control point and one anchor point of a Bezier curve, adding a new segment to a line or shape. The first time `quadratic_vertex()` is used within a [](py5graphics_begin_shape) call, it must be prefaced with a call to [](py5graphics_vertex) to set the first anchor point. This method must be used between [](py5graphics_begin_shape) and [](py5graphics_end_shape) and only when there is no `MODE` parameter specified to [](py5graphics_begin_shape). Using the 3D version requires rendering with `P3D`.
This method is the same as [](sketch_quadratic_vertex) but linked to a `Py5Graphics` object. To see example code for how it can be used, see [](sketch_quadratic_vertex).
Underlying Processing method: PGraphics.quadraticVertex
## Signatures
```python
quadratic_vertex(
cx: float, # the x-coordinate of the control point
cy: float, # the y-coordinate of the control point
cz: float, # the z-coordinate of the control point
x3: float, # the x-coordinate of the anchor point
y3: float, # the y-coordinate of the anchor point
z3: float, # the z-coordinate of the anchor point
/,
) -> None
quadratic_vertex(
cx: float, # the x-coordinate of the control point
cy: float, # the y-coordinate of the control point
x3: float, # the x-coordinate of the anchor point
y3: float, # the y-coordinate of the anchor point
/,
) -> None
```
Updated on March 06, 2023 02:49:26am UTC