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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: testskip
# -----------------------------------------------------------------------------
# Copyright (c) 2014, Nicolas P. Rougier. All Rights Reserved.
# Distributed under the (new) BSD License.
# -----------------------------------------------------------------------------
from vispy import app, gloo
from vispy.util import load_data_file
from vispy.util.svg import Document
from vispy.visuals.collections import PathCollection, PolygonCollection
from vispy.visuals.transforms import PanZoomTransform
path = load_data_file('tiger/tiger.svg')
tiger = Document(path)
width, height = int(tiger.viewport.width), int(tiger.viewport.height)
canvas = app.Canvas(size=(width, height), show=True, keys='interactive')
gloo.set_viewport(0, 0, width, height)
gloo.set_state("translucent", depth_test=True)
panzoom = PanZoomTransform(canvas, aspect=1.0)
paths = PathCollection(
"agg+", linewidth='shared', color="shared", transform=panzoom)
polys = PolygonCollection("agg", transform=panzoom)
paths.update.connect(canvas.update)
z = 0
for path in tiger.paths:
for vertices, closed in path.vertices:
vertices = 2 * (vertices / (width, height, 1)) - 1
vertices[:, 1] = -vertices[:, 1]
if len(vertices) < 3:
continue
if path.style.stroke is not None:
vertices[:, 2] = z - 0.5 / 1000.
if path.style.stroke_width:
stroke_width = path.style.stroke_width.value
else:
stroke_width = 2.0
paths.append(vertices, closed=closed, color=path.style.stroke.rgba,
linewidth=stroke_width)
if path.style.fill is not None:
if path.style.stroke is None:
vertices[:, 2] = z - 0.25 / 1000.
paths.append(vertices, closed=closed,
color=path.style.fill.rgba,
linewidth=1)
vertices[:, 2] = z
polys.append(vertices, color=path.style.fill.rgba)
z -= 1 / 1000.
paths["linewidth"] = 1.0
paths['viewport'] = 0, 0, 800, 800
@canvas.connect
def on_draw(e):
gloo.clear('white')
polys.draw()
paths.draw()
@canvas.connect
def on_resize(e):
width, height = e.size[0], e.size[1]
gloo.set_viewport(0, 0, width, height)
paths['viewport'] = 0, 0, width, height
if __name__ == '__main__':
canvas.show()
app.run()
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