convert higher degree SH to lower degree SH
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bevy_gaussian_splatting/src/io/ply.rs
Line 65 in 507a28d
fn set_property(&mut self, key: String, property: Property) {
match (key.as_ref(), property) {
("x", Property::Float(v)) => self.position_visibility.position[0] = v,
("y", Property::Float(v)) => self.position_visibility.position[1] = v,
("z", Property::Float(v)) => self.position_visibility.position[2] = v,
("f_dc_0", Property::Float(v)) => self.spherical_harmonic.set(0, v),
("f_dc_1", Property::Float(v)) => self.spherical_harmonic.set(1, v),
("f_dc_2", Property::Float(v)) => self.spherical_harmonic.set(2, v),
("scale_0", Property::Float(v)) => self.scale_opacity.scale[0] = v,
("scale_1", Property::Float(v)) => self.scale_opacity.scale[1] = v,
("scale_2", Property::Float(v)) => self.scale_opacity.scale[2] = v,
("opacity", Property::Float(v)) => self.scale_opacity.opacity = 1.0 / (1.0 + (-v).exp()),
("rot_0", Property::Float(v)) => self.rotation.rotation[0] = v,
("rot_1", Property::Float(v)) => self.rotation.rotation[1] = v,
("rot_2", Property::Float(v)) => self.rotation.rotation[2] = v,
("rot_3", Property::Float(v)) => self.rotation.rotation[3] = v,
(_, Property::Float(v)) if key.starts_with("f_rest_") => {
let i = key[7..].parse::<usize>().unwrap();
// interleaved
// if (i + 3) < SH_COEFF_COUNT {
// self.spherical_harmonic.coefficients[i + 3] = v;
// }
// planar
let channel = i / SH_COEFF_COUNT_PER_CHANNEL;
let coefficient = if SH_COEFF_COUNT_PER_CHANNEL == 1 {
1
} else {
(i % (SH_COEFF_COUNT_PER_CHANNEL - 1)) + 1
};
let interleaved_idx = coefficient * SH_CHANNELS + channel;
if interleaved_idx < SH_COEFF_COUNT {
self.spherical_harmonic.set(interleaved_idx, v);
} else {
// TODO: convert higher degree SH to lower degree SH
}
}
(_, _) => {},