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import array
import time
import layered_window
import moderngl
mem = layered_window.init((400, 400), title='Animation')
# mem = layered_window.init((400, 400), title='Animation', tool_window=True, always_on_top=True)
ctx = moderngl.create_context(standalone=True)
image = ctx.texture((400, 400), components=4)
framebuffer = ctx.framebuffer(color_attachments=[image])
triangle = array.array('f', [
1.0, 0.0, 1.0, 0.0, 0.0, 0.5,
-0.5, 0.86, 0.0, 1.0, 0.0, 0.5,
-0.5, -0.86, 0.0, 0.0, 1.0, 0.5,
])
vertex_buffer = ctx.buffer(triangle)
program = ctx.program(
vertex_shader='''
#version 330 core
uniform vec2 scale;
uniform float rotation;
layout (location = 0) in vec2 in_vertex;
layout (location = 1) in vec4 in_color;
out vec4 v_color;
void main() {
float r = rotation * (0.5 + float(gl_InstanceID) * 0.05);
mat2 rot = mat2(cos(r), sin(r), -sin(r), cos(r));
gl_Position = vec4((rot * in_vertex) * scale, 0.0, 1.0);
v_color = in_color;
}
''',
fragment_shader='''
#version 330 core
in vec4 v_color;
layout (location = 0) out vec4 out_color;
void main() {
out_color = vec4(v_color);
out_color.rgb = pow(out_color.rgb, vec3(1.0 / 2.2));
}
''',
)
ctx.enable_only(moderngl.BLEND)
ctx.blend_func = (ctx.SRC_ALPHA, ctx.ONE_MINUS_SRC_ALPHA, ctx.SRC_ALPHA, ctx.ONE)
vao = ctx.vertex_array(program, [
(vertex_buffer, '2f 4f', 'in_vertex', 'in_color'),
])
vao.vertices = 3
vao.instances = 10
start_time = time.perf_counter()
while True:
now = time.perf_counter() - start_time
framebuffer.use()
framebuffer.clear(0.0, 0.0, 0.0, 0.0)
program['scale'].value = (0.8, 0.8)
program['rotation'].value = now
vao.render()
framebuffer.read_into(mem, components=4)
layered_window.update()
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