ZenGL
pip install zengl
Concept
ZenGL provides a simple way to render from Python. We aim to support headless rendering first, rendering to a window is done by blitting the final image to the screen. By doing this we have full control of what we render. The window does not have to be multisample, and it requires no depth buffer at all.
Examples
pip install -r examples/requirements.txt
python examples/example_browser.py
grass.py
envmap.py
normal_mapping.py
rigged_objects.py
instanced_crates.py
julia_fractal.py
blending.py
render_to_texture.py
pybullet_box_pile.py
pygmsh_shape.py
texture_array.py
monkey.py
reflection.py
polygon_offset.py
blur.py
hello_triangle.py
hello_triangle_srgb.py
viewports.py
points.py
wireframe_terrain.py
crate.py
sdf_example.py
sdf_tree.py
mipmaps.py
conways_game_of_life.py
Headless
import zengl
from PIL import Image
ctx = zengl.context(zengl.loader(headless=True))
size = (1280, 720)
image = ctx.image(size, 'rgba8unorm', samples=1)
triangle = ctx.pipeline(
vertex_shader='''
#version 330
out vec3 v_color;
vec2 positions[3] = vec2[](
vec2(0.0, 0.8),
vec2(-0.6, -0.8),
vec2(0.6, -0.8)
);
vec3 colors[3] = vec3[](
vec3(1.0, 0.0, 0.0),
vec3(0.0, 1.0, 0.0),
vec3(0.0, 0.0, 1.0)
);
void main() {
gl_Position = vec4(positions[gl_VertexID], 0.0, 1.0);
v_color = colors[gl_VertexID];
}
''',
fragment_shader='''
#version 330
in vec3 v_color;
layout (location = 0) out vec4 out_color;
void main() {
out_color = vec4(v_color, 1.0);
}
''',
framebuffer=[image],
topology='triangles',
vertex_count=3,
)
image.clear_value = (1.0, 1.0, 1.0, 1.0)
image.clear()
triangle.render()
Image.frombuffer('RGBA', size, image.read(), 'raw', 'RGBA', 0, -1).save('hello.png')Type Hints
