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Improve struct creation helper methods by auto converting arguments: (#119)

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* None to ffi.NULL
 * array and ndarray to buffer, and keep weakref so it doesn't get GCed

This makes it possible to create Mesh structs without too much faffing.
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Richard Smith 2024-03-03 11:45:09 +00:00 • committed by GitHub
parent ef3681fc5b
commit 33dce4ecfd
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2 changed files with 139 additions and 3 deletions
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120
examples/extra/mesh_creation.py Normal file
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@ -0,0 +1,120 @@
from array import array
import pyray as pr
W, H = 640, 480
def make_cube(width, height, length):
vertices = array('f', [
-width / 2, -height / 2, length / 2,
width / 2, -height / 2, length / 2,
width / 2, height / 2, length / 2,
-width / 2, height / 2, length / 2,
-width / 2, -height / 2, -length / 2,
-width / 2, height / 2, -length / 2,
width / 2, height / 2, -length / 2,
width / 2, -height / 2, -length / 2,
-width / 2, height / 2, -length / 2,
-width / 2, height / 2, length / 2,
width / 2, height / 2, length / 2,
width / 2, height / 2, -length / 2,
-width / 2, -height / 2, -length / 2,
width / 2, -height / 2, -length / 2,
width / 2, -height / 2, length / 2,
-width / 2, -height / 2, length / 2,
width / 2, -height / 2, -length / 2,
width / 2, height / 2, -length / 2,
width / 2, height / 2, length / 2,
width / 2, -height / 2, length / 2,
-width / 2, -height / 2, -length / 2,
-width / 2, -height / 2, length / 2,
-width / 2, height / 2, length / 2,
-width / 2, height / 2, -length / 2
])
texcoords = array('f', [
0.0, 0.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0,
0.0, 0.0,
0.0, 1.0,
0.0, 0.0,
1.0, 0.0,
1.0, 1.0,
1.0, 1.0,
0.0, 1.0,
0.0, 0.0,
1.0, 0.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0,
0.0, 0.0,
0.0, 0.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0])
normals = array('f', [
0.0, 0.0, 1.0,
0.0, 0.0, 1.0,
0.0, 0.0, 1.0,
0.0, 0.0, 1.0,
0.0, 0.0, -1.0,
0.0, 0.0, -1.0,
0.0, 0.0, -1.0,
0.0, 0.0, -1.0,
0.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.0, -1.0, 0.0,
0.0, -1.0, 0.0,
0.0, -1.0, 0.0,
0.0, -1.0, 0.0,
1.0, 0.0, 0.0,
1.0, 0.0, 0.0,
1.0, 0.0, 0.0,
1.0, 0.0, 0.0,
-1.0, 0.0, 0.0,
-1.0, 0.0, 0.0,
-1.0, 0.0, 0.0,
-1.0, 0.0, 0.0
])
indices = array('h',
sum([[4 * k, 4 * k + 1, 4 * k + 2, 4 * k, 4 * k + 2, 4 * k + 3] for k in range(0, 6)], []))
print(vertices, indices)
return (pr.Mesh(24, 12, vertices, texcoords,
None, normals, None, None, indices,
None, None, None, None, 0, None))
pr.init_window(W, H, "Mesh creation")
msh = make_cube(3, 4, 40)
pr.upload_mesh(msh, False)
matdefault = pr.load_material_default()
eye = pr.matrix_identity()
camera = pr.Camera3D((30.0, 20.0, 30.0), (0.0, 0.0, 0.0), (0.0, 1.0, 0.0), 70.0,
pr.CameraProjection.CAMERA_PERSPECTIVE)
# Export so we can inspect it
pr.export_mesh(msh, "test-cube.obj")
while not pr.window_should_close():
pr.update_camera(camera, pr.CameraMode.CAMERA_ORBITAL)
pr.begin_drawing()
pr.clear_background(pr.BLACK)
pr.begin_mode_3d(camera)
pr.draw_grid(10, 5.0)
pr.draw_mesh(msh, matdefault, eye)
pr.end_mode_3d()
pr.end_drawing()
pr.close_window()