.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "gallery/gloo/textured_quad.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. note:: :class: sphx-glr-download-link-note :ref:`Go to the end ` to download the full example code. .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_gloo_textured_quad.py: Show a textured quad ==================== .. GENERATED FROM PYTHON SOURCE LINES 10-69 .. rst-class:: sphx-glr-script-out .. code-block:: none /home/runner/work/vispy/vispy/examples/gloo/textured_quad.py:38: DeprecationWarning: `row_stack` alias is deprecated. Use `np.vstack` directly. Z = np.row_stack(grid_num // 2 * (row_even, row_odd)).astype(np.uint8) | .. code-block:: Python import numpy as np from vispy import gloo, app from vispy.gloo import Program vertex = """ attribute vec2 position; attribute vec2 texcoord; varying vec2 v_texcoord; void main() { gl_Position = vec4(position, 0.0, 1.0); v_texcoord = texcoord; } """ fragment = """ uniform sampler2D texture; varying vec2 v_texcoord; void main() { gl_FragColor = texture2D(texture, v_texcoord); } """ def checkerboard(grid_num=8, grid_size=32): row_even = grid_num // 2 * [0, 1] row_odd = grid_num // 2 * [1, 0] Z = np.row_stack(grid_num // 2 * (row_even, row_odd)).astype(np.uint8) return 255 * Z.repeat(grid_size, axis=0).repeat(grid_size, axis=1) class Canvas(app.Canvas): def __init__(self): app.Canvas.__init__(self, size=(512, 512), title='Textured quad', keys='interactive') # Build program & data self.program = Program(vertex, fragment, count=4) self.program['position'] = [(-1, -1), (-1, +1), (+1, -1), (+1, +1)] self.program['texcoord'] = [(0, 0), (1, 0), (0, 1), (1, 1)] self.program['texture'] = checkerboard() gloo.set_viewport(0, 0, *self.physical_size) self.show() def on_draw(self, event): gloo.set_clear_color('white') gloo.clear(color=True) self.program.draw('triangle_strip') def on_resize(self, event): gloo.set_viewport(0, 0, *event.physical_size) if __name__ == '__main__': c = Canvas() app.run() .. rst-class:: sphx-glr-timing **Total running time of the script:** (0 minutes 0.104 seconds) .. _sphx_glr_download_gallery_gloo_textured_quad.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: textured_quad.ipynb ` .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: textured_quad.py ` .. container:: sphx-glr-download sphx-glr-download-zip :download:`Download zipped: textured_quad.zip ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_