pub struct Context {
pub viewport: Option<Viewport>,
pub view: Matrix2d,
pub transform: Matrix2d,
pub draw_state: DrawState,
}
Expand description
Drawing 2d context.
Fields§
§viewport: Option<Viewport>
Viewport information.
view: Matrix2d
View transformation.
transform: Matrix2d
Current transformation.
draw_state: DrawState
Current draw state settings.
Implementations§
source§impl Context
impl Context
sourcepub fn new_viewport(viewport: Viewport) -> Context
pub fn new_viewport(viewport: Viewport) -> Context
Creates a new context with absolute transform in point coordinates.
This function assumes the default coordinate system being centered with x axis pointing to the right and y axis pointing up.
Returns a drawing context with origin in the upper left corner and x axis pointing to the right and y axis pointing down.
sourcepub fn new_abs(w: Scalar, h: Scalar) -> Context
pub fn new_abs(w: Scalar, h: Scalar) -> Context
Creates a new drawing context in absolute coordinates.
This function assumes the default coordinate system being centered with x axis pointing to the right and y axis pointing up.
Returns a drawing context with origin in the upper left corner and x axis pointing to the right and y axis pointing down.
sourcepub fn view(self) -> Self
pub fn view(self) -> Self
Moves the current transform to the view coordinate system.
This is usually [0.0, 0.0] in the upper left corner with the x axis pointing to the right and the y axis pointing down.
sourcepub fn reset(self) -> Self
pub fn reset(self) -> Self
Moves the current transform to the default coordinate system.
This is usually [0.0, 0.0] in the center with the x axis pointing to the right and the y axis pointing up.
sourcepub fn store_view(self) -> Self
pub fn store_view(self) -> Self
Stores the current transform as new view.
sourcepub fn get_view_size(&self) -> Vec2d
pub fn get_view_size(&self) -> Vec2d
Computes the current view size.