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Show a rotating textured cube#
/home/runner/work/vispy/vispy/examples/gloo/textured_cube.py:53: DeprecationWarning: `row_stack` alias is deprecated. Use `np.vstack` directly.
Z = np.row_stack(grid_num // 2 * (row_even, row_odd)).astype(np.uint8)
import numpy as np
from vispy import gloo, app
from vispy.gloo import Program, VertexBuffer, IndexBuffer
from vispy.util.transforms import perspective, translate, rotate
from vispy.geometry import create_cube
vertex = """
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
uniform sampler2D texture;
attribute vec3 position;
attribute vec2 texcoord;
attribute vec3 normal;
attribute vec4 color;
varying vec2 v_texcoord;
void main()
{
gl_Position = projection * view * model * vec4(position,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 cube',
keys='interactive')
self.timer = app.Timer('auto', self.on_timer)
# Build cube data
V, I, _ = create_cube()
vertices = VertexBuffer(V)
self.indices = IndexBuffer(I)
# Build program
self.program = Program(vertex, fragment)
self.program.bind(vertices)
# Build view, model, projection & normal
view = translate((0, 0, -5))
model = np.eye(4, dtype=np.float32)
self.program['model'] = model
self.program['view'] = view
self.program['texture'] = checkerboard()
self.activate_zoom()
self.phi, self.theta = 0, 0
# OpenGL initalization
gloo.set_state(clear_color=(0.30, 0.30, 0.35, 1.00), depth_test=True)
self.timer.start()
self.show()
def on_draw(self, event):
gloo.clear(color=True, depth=True)
self.program.draw('triangles', self.indices)
def on_resize(self, event):
self.activate_zoom()
def activate_zoom(self):
gloo.set_viewport(0, 0, *self.physical_size)
projection = perspective(45.0, self.size[0] / float(self.size[1]),
2.0, 10.0)
self.program['projection'] = projection
def on_timer(self, event):
self.theta += .5
self.phi += .5
self.program['model'] = np.dot(rotate(self.theta, (0, 0, 1)),
rotate(self.phi, (0, 1, 0)))
self.update()
if __name__ == '__main__':
c = Canvas()
app.run()
Total running time of the script: (0 minutes 0.126 seconds)