3D-printing/OrcaSlicer
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Handling of left hand oriented coordinate systems:

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is_left_handed() method on transformations and volumes
rendering of GLVolumes in left handed coordinate systems by glFrontFace(GL_CW);
SLA slicing on left hand oriented instances by flipping the mesh for SLAPrintObject in X.
rendering of the SLA cutting plane in left handed systems
resetting the SLA clipping planes on 3D preview invalidation
This commit is contained in:
bubnikv 2019-04-02 13:47:49 +02:00
parent 9594bf43b5
commit 086f11df98
11 changed files with 80 additions and 62 deletions
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1
src/libslic3r/Geometry.hpp
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@ -246,6 +246,7 @@ public:
const Vec3d& get_mirror() const { return m_mirror; }
double get_mirror(Axis axis) const { return m_mirror(axis); }
bool is_left_handed() const { return m_mirror.x() * m_mirror.y() * m_mirror.z() < 0.; }
void set_mirror(const Vec3d& mirror);
void set_mirror(Axis axis, double mirror);

1
src/libslic3r/Model.hpp
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@ -394,6 +394,7 @@ public:
const Vec3d& get_mirror() const { return m_transformation.get_mirror(); }
double get_mirror(Axis axis) const { return m_transformation.get_mirror(axis); }
bool is_left_handed() const { return m_transformation.is_left_handed(); }
void set_mirror(const Vec3d& mirror) { m_transformation.set_mirror(mirror); }
void set_mirror(Axis axis, double mirror) { m_transformation.set_mirror(axis, mirror); }

7
src/libslic3r/SLAPrint.cpp
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@ -93,7 +93,10 @@ static Transform3d sla_trafo(const ModelObject &model_object)
offset(0) = 0.;
offset(1) = 0.;
rotation(2) = 0.;
return Geometry::assemble_transform(offset, rotation, model_instance.get_scaling_factor(), model_instance.get_mirror());
Transform3d trafo = Geometry::assemble_transform(offset, rotation, model_instance.get_scaling_factor(), model_instance.get_mirror());
if (model_instance.is_left_handed())
trafo = Eigen::Scaling(Vec3d(-1., 1., 1.)) * trafo;
return trafo;
}
// List of instances, where the ModelInstance transformation is a composite of sla_trafo and the transformation defined by SLAPrintObject::Instance.
@ -399,7 +402,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, const DynamicPrintConf
// FIXME: this invalidates the transformed mesh in SLAPrintObject
// which is expensive to calculate (especially the raw_mesh() call)
print_object->set_trafo(sla_trafo(model_object));
print_object->set_trafo(sla_trafo(model_object), model_object.instances.front()->is_left_handed());
print_object->set_instances(new_instances);
print_object->config_apply(config, true);

7
src/libslic3r/SLAPrint.hpp
View file

@ -51,6 +51,7 @@ public:
const SLAPrintObjectConfig& config() const { return m_config; }
const Transform3d& trafo() const { return m_trafo; }
bool is_left_handed() const { return m_left_handed; }
struct Instance {
Instance(ModelID instance_id, const Point &shift, float rotation) : instance_id(instance_id), shift(shift), rotation(rotation) {}
@ -241,8 +242,8 @@ protected:
void config_apply_only(const ConfigBase &other, const t_config_option_keys &keys, bool ignore_nonexistent = false)
{ this->m_config.apply_only(other, keys, ignore_nonexistent); }
void set_trafo(const Transform3d& trafo) {
m_transformed_rmesh.invalidate([this, &trafo](){ m_trafo = trafo; });
void set_trafo(const Transform3d& trafo, bool left_handed) {
m_transformed_rmesh.invalidate([this, &trafo, left_handed](){ m_trafo = trafo; m_left_handed = left_handed; });
}
void set_instances(const std::vector<Instance> &instances) { m_instances = instances; }
@ -262,6 +263,8 @@ private:
// Translation in Z + Rotation by Y and Z + Scaling / Mirroring.
Transform3d m_trafo = Transform3d::Identity();
// m_trafo is left handed -> 3x3 affine transformation has negative determinant.
bool m_left_handed = false;
std::vector<Instance> m_instances;