.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "gallery/gloo/display_shape.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_display_shape.py: Draw a Quad =========== Simple example demonstrating showing a quad using a gloo Program. .. GENERATED FROM PYTHON SOURCE LINES 11-65 .. image-sg:: /gallery/gloo/images/sphx_glr_display_shape_001.png :alt: display shape :srcset: /gallery/gloo/images/sphx_glr_display_shape_001.png :class: sphx-glr-single-img .. code-block:: Python from vispy import gloo from vispy import app import numpy as np # Create vertices vPosition = np.array([[-0.8, -0.8, 0.0], [+0.7, -0.7, 0.0], [-0.7, +0.7, 0.0], [+0.8, +0.8, 0.0, ]], np.float32) VERT_SHADER = """ // simple vertex shader attribute vec3 a_position; void main (void) { gl_Position = vec4(a_position, 1.0); } """ FRAG_SHADER = """ // simple fragment shader uniform vec4 u_color; void main() { gl_FragColor = u_color; } """ class Canvas(app.Canvas): def __init__(self): super().__init__(keys='interactive') # Create program self._program = gloo.Program(VERT_SHADER, FRAG_SHADER) # Set uniform and attribute self._program['u_color'] = 0.2, 1.0, 0.4, 1 self._program['a_position'] = gloo.VertexBuffer(vPosition) gloo.set_clear_color('white') self.show() def on_resize(self, event): width, height = event.physical_size gloo.set_viewport(0, 0, width, height) def on_draw(self, event): gloo.clear() self._program.draw('triangle_strip') if __name__ == '__main__': canvas = Canvas() app.run() .. rst-class:: sphx-glr-timing **Total running time of the script:** (0 minutes 0.444 seconds) .. _sphx_glr_download_gallery_gloo_display_shape.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: display_shape.ipynb ` .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: display_shape.py ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_