4.1.3.8. Ortho2D¶

This module implements an Orthonormal 2D Viewport.

class PyOpenGLng.HighLevelApi.Ortho2D.Ortho2D(max_area, zoom_manager, window)[source]¶

Bases: object

This class implements an Orthonormal 2D Viewport.

Public Attributes:

display_scale

gl_to_window_parity

inverse_parity_display_scale

parity_display_scale

viewport_area

window

zoom_manager

The parameter max_area must be an Tools.Interval.Interval2D instance that defines the maximum area allowed for the viewport.

The parameter zoom_manager must be an ZoomManager instance.

The parameter window must implement a Window Trait, that defines a method size() returning the 2-tuple (width, height).

_compute_display_scale()[source]¶

Compute the display scale.

_compute_zoom_to_fit_axis(length, axis)[source]¶

Compute the zoom to fit an axis size.

_compute_zoom_to_fit_interval(interval)[source]¶

Compute the zoom to fit an interval. The parameter interval must be an Tools.Interval.Interval2D instance.

_logger = <logging.Logger object at 0x43d9410>¶

fit_axis(length, axis)[source]¶

Set the zoom so as to fit an axis size.

get_state()[source]¶

Get the viewport state.

gl_to_window_coordinate(gl_point)[source]¶

Return the window coordinate from the scene coordinate. The parameter gl_point must be an Numpy array.

gl_to_window_parity = array([ 1., -1.])¶

ortho2d_bounding_box()[source]¶

resize()[source]¶

Resize the viewport for the new window size.

row_bounding_box()[source]¶

set_state(state)[source]¶

Set the viewport state.

translate(dx, axis)[source]¶

Translate the viewport of dx in the axis direction.

view_matrix()[source]¶

Return the view matrix.

viewport_scale(window_size)[source]¶

Return the viewport scale.

viewport_uniform_buffer_data(window_size)[source]¶

Return the viewport uniform buffer data.

window_to_gl_coordinate(window_point)[source]¶

Return the scene coordinate from the window coordinate. The parameter window_point must be an Numpy array.

window_to_gl_distance(x_window)[source]¶

zoom_at(center)[source]¶

Zoom the viewport centered on the point center. The parameter center must be an Numpy array.

zoom_at_center(zoom_factor)[source]¶

Zoom on the viewport center.

zoom_at_with_scale(point, zoom_factor)[source]¶

Zoom the viewport centered on a point. The parameter point must be an Numpy array.

zoom_interval(interval)[source]¶

Zoom to an interval. The parameter interval must be an Tools.Interval.Interval2D instance.

class PyOpenGLng.HighLevelApi.Ortho2D.ViewportArea(max_area)[source]¶

Bases: object

This class defines a viewport area.

It implements an interval arithmetic using the class Tools.Interval.Interval2D.

Public Attributes:

ref_point

The parameter max_area must be an Tools.Interval.Interval2D instance that defines the maximum area allowed for the viewport.

_check_area(area)[source]¶

Check the interval area is included in the the max area.

_check_axis_interval(axis_interval, axis)[source]¶

Check the axis interval and return a new one that is included in the max area.

_logger = <logging.Logger object at 0x43d9410>¶

_set_reference_point()[source]¶

Set the reference point of the viewport defined as the left-bottom corner.

area[source]¶

center()[source]¶

Return the viewport center as an Numpy array.

max_area[source]¶

size(dtype=<type 'numpy.uint64'>)[source]¶

Return the viewport size as an Numpy array.

translate(dx, axis)[source]¶

Translate the viewport of dx in the axis direction.

class PyOpenGLng.HighLevelApi.Ortho2D.ZoomManagerAbc[source]¶

Bases: object

This class implements a basic zoom manager.

Public Attributes:

zoom_factor

The initial zoom factor is set to one.

_logger = <logging.Logger object at 0x43d9410>¶

check_zoom(zoom_factor)[source]¶

Basic implementation to check a zoom factor, return the 2-tuple (True, zoom_factor).

PyOpenGLng.HighLevelApi.Ortho2D.interval2d_from_center_and_size(center, size)[source]¶

Return an Tools.Interval.Interval2D instance. The parameter center is a 2-tuple that defines the center of the interval and the parameter size the 2-tuple (width, height).