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# -*- coding: utf-8 -*-
"""
Tests for PolygonVisual
All images are of size (100,100) to keep a small file size
"""
import numpy as np
from vispy.scene import visuals, transforms
from vispy.testing import (requires_application, requires_scipy, TestingCanvas,
run_tests_if_main)
from vispy.testing.image_tester import assert_image_approved
@requires_application()
@requires_scipy()
def test_square_draw():
"""Test drawing squares without transforms using PolygonVisual"""
pos = np.array([[-0.5, 0.5, 0],
[0.5, 0.5, 0],
[0.5, -0.5, 0],
[-0.5, -0.5, 0]])
with TestingCanvas() as c:
polygon = visuals.Polygon(pos=pos, color=(1, 0, 0, 1),
parent=c.scene)
polygon.transform = transforms.STTransform(scale=(50, 50),
translate=(50, 50))
assert_image_approved(c.render(), 'visuals/square1.png')
polygon.parent = None
polygon = visuals.Polygon(pos=pos, color=(1, 0, 0, 1),
border_color=(1, 1, 1, 1),
parent=c.scene)
polygon.transform = transforms.STTransform(scale=(50, 50),
translate=(50, 50))
assert_image_approved(c.render(), 'visuals/square2.png')
polygon.parent = None
polygon = visuals.Polygon(pos=pos, border_color=(1, 1, 1, 1),
parent=c.scene)
polygon.transform = transforms.STTransform(scale=(50, 50),
translate=(50, 50))
assert_image_approved(c.render(), 'visuals/square3.png',
min_corr=0.45)
@requires_application()
@requires_scipy()
def test_rectangle_draw():
"""Test drawing rectangles with transforms using PolygonVisual"""
pos = np.array([[-0.1, 0.5, 0],
[0.1, 0.5, 0],
[0.1, -0.5, 0],
[-0.1, -0.5, 0]])
with TestingCanvas() as c:
polygon = visuals.Polygon(pos=pos, color=(1, 1, 0, 1), parent=c.scene)
polygon.transform = transforms.STTransform(scale=(200.0, 25),
translate=(50, 50))
assert_image_approved(c.render(), 'visuals/rectangle1.png')
polygon.parent = None
polygon = visuals.Polygon(pos=pos, color=(1, 1, 0, 1),
border_color=(1, 0, 0, 1),
parent=c.scene)
polygon.transform = transforms.STTransform(scale=(200.0, 25),
translate=(50, 50))
assert_image_approved(c.render(), 'visuals/rectangle2.png')
polygon.parent = None
polygon = visuals.Polygon(pos=pos, border_color=(1, 0, 0, 1),
border_width=1, parent=c.scene)
polygon.transform = transforms.STTransform(scale=(200.0, 25),
translate=(50, 49))
assert_image_approved(c.render(), 'visuals/rectangle3.png',
min_corr=0.7)
@requires_application()
@requires_scipy()
def test_reactive_draw():
"""Test reactive polygon attributes"""
pos = np.array([[-0.1, 0.5, 0],
[0.1, 0.5, 0],
[0.1, -0.5, 0],
[-0.1, -0.5, 0]])
with TestingCanvas() as c:
polygon = visuals.Polygon(pos=pos, color='yellow', parent=c.scene)
polygon.transform = transforms.STTransform(scale=(50, 50),
translate=(50, 50))
polygon.pos += [0.1, -0.1, 0]
assert_image_approved(c.render(), 'visuals/reactive_polygon1.png')
polygon.color = 'red'
assert_image_approved(c.render(), 'visuals/reactive_polygon2.png')
polygon.border_color = 'yellow'
assert_image_approved(c.render(), 'visuals/reactive_polygon3.png',
min_corr=0.8)
run_tests_if_main()
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