def _update_data(self, ctx: moderngl.Context):
sizes = [v.shape[0] for v in self.data.values()]
assert np.std(
sizes
) == 0, "All data needs to be of the same size! Got %s" % str(sizes)
for k in self.data:
assert k in self.inputs, 'Data \'%s\' not a shader input. Possible values : %s' % (
k, str(self.inputs))
buffers = []
for k, i in self.inputs.items():
if k not in self.data:
if k[:3] != 'gl_':
print('Input \'%s\' not specified! Ignoring it.' % k)
continue
data = self.data[k].astype('f4').tobytes()
if k not in self.data_buf or self.data_buf[k].size < len(data):
self.data_buf[k] = ctx.buffer(data)
else:
self.data_buf[k].write(data)
if len(self.data[k].shape) <= 1 or self.data[k].shape[1] == 1:
buffers.append((self.data_buf[k], 'f4', k))
else:
buffers.append(
(self.data_buf[k], '%df4' % self.data[k].shape[1], k))
buffer_names = set([k for _, _, k in buffers])
if self.vao is None or self._vao_buffers != buffer_names:
self.vao = ctx.vertex_array(self.program, buffers)
self._vao_buffers = buffer_names
return sizes[0]
def __init__(self, *, ctx: moderngl.Context, size: Tuple[int, int, int]):
self.ctx = ctx
self._size = size
# Create lookup texture for active blocks
# NOTE: We allocate room for 100 x 100 x 100 for now
# 100 x 100 x 100 = 1_000_000 fragments
# 1000 x 1000 = 1_000_000 fragments
# We store several 100 x 100 layers respersting one slice in voxel
self.voxel_lookup = self.ctx.texture((1000, 1000), 1, dtype='f1')
self.voxel_lookup.filter = moderngl.NEAREST, moderngl.NEAREST
self.voxel_lookup.repeat_x = False
self.voxel_lookup.repeat_y = False
# Write in some default data
for i in range(100):
self.fill_layer(i, 255)
# Construct the per-instance data for active cubes using a transform
self.instance_data = ctx.buffer(reserve=self.max_cubes * 4 * 3)
self.quad_fs = geometry.quad_fs()
self.gen_instance_vao = None
self._num_instances = 0
self._query = self.ctx.query(primitives=True)
self.cube = geometry.cube()
self.cube.buffer(self.instance_data, "3f/i", ["in_offset"])
# Filled externally
self.texture_prog = None
self.gen_instance_prog = None
self.voxel_light_prog = None
self.voxel_wireframe_prog = None
def _compile(self, ctx: moderngl.Context):
if self.program is None:
self.program = ctx.program(vertex_shader=self.vertex_shader,
fragment_shader=self.fragment_shader,
geometry_shader=self.geometry_shader)
for n in self.program:
v = self.program[n]
if isinstance(v, moderngl.Attribute):
self.inputs[n] = v
if isinstance(v, moderngl.Uniform):
self.uniforms[n] = v
