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#include "Flow.hpp"
#include "Print.hpp"
#include <cmath>
#include <assert.h>
namespace Slic3r {
// This static method returns a sane extrusion width default.
static inline float auto_extrusion_width(FlowRole role, float nozzle_diameter, float height)
{
switch (role) {
case frSupportMaterial:
case frSupportMaterialInterface:
case frTopSolidInfill:
return nozzle_diameter;
default:
case frExternalPerimeter:
case frPerimeter:
case frSolidInfill:
case frInfill:
return 1.125f * nozzle_diameter;
}
}
// This constructor builds a Flow object from an extrusion width config setting
// and other context properties.
Flow Flow::new_from_config_width(FlowRole role, const ConfigOptionFloatOrPercent &width, float nozzle_diameter, float height, float bridge_flow_ratio)
{
// we need layer height unless it's a bridge
if (height <= 0 && bridge_flow_ratio == 0)
CONFESS("Invalid flow height supplied to new_from_config_width()");
float w;
if (bridge_flow_ratio > 0) {
// If bridge flow was requested, calculate the bridge width.
height = w = (bridge_flow_ratio == 1.) ?
// optimization to avoid sqrt()
nozzle_diameter :
sqrt(bridge_flow_ratio) * nozzle_diameter;
} else if (! width.percent && width.value == 0.) {
// If user left option to 0, calculate a sane default width.
w = auto_extrusion_width(role, nozzle_diameter, height);
} else {
// If user set a manual value, use it.
w = float(width.get_abs_value(height));
}
return Flow(w, height, nozzle_diameter, bridge_flow_ratio > 0);
}
// This constructor builds a Flow object from a given centerline spacing.
Flow Flow::new_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge)
{
// we need layer height unless it's a bridge
if (height <= 0 && !bridge)
CONFESS("Invalid flow height supplied to new_from_spacing()");
// Calculate width from spacing.
// For normal extrusons, extrusion width is wider than the spacing due to the rounding and squishing of the extrusions.
// For bridge extrusions, the extrusions are placed with a tiny BRIDGE_EXTRA_SPACING gaps between the threads.
float width = float(bridge ?
(spacing - BRIDGE_EXTRA_SPACING) :
#ifdef HAS_PERIMETER_LINE_OVERLAP
(spacing + PERIMETER_LINE_OVERLAP_FACTOR * height * (1. - 0.25 * PI));
#else
(spacing + height * (1. - 0.25 * PI)));
#endif
return Flow(width, bridge ? width : height, nozzle_diameter, bridge);
}
// This method returns the centerline spacing between two adjacent extrusions
// having the same extrusion width (and other properties).
float Flow::spacing() const
{
#ifdef HAS_PERIMETER_LINE_OVERLAP
if (this->bridge)
return this->width + BRIDGE_EXTRA_SPACING;
// rectangle with semicircles at the ends
float min_flow_spacing = this->width - this->height * (1. - 0.25 * PI);
return this->width - PERIMETER_LINE_OVERLAP_FACTOR * (this->width - min_flow_spacing);
#else
return float(this->bridge ? (this->width + BRIDGE_EXTRA_SPACING) : (this->width - this->height * (1. - 0.25 * PI)));
#endif
}
// This method returns the centerline spacing between an extrusion using this
// flow and another one using another flow.
// this->spacing(other) shall return the same value as other.spacing(*this)
float Flow::spacing(const Flow &other) const
{
assert(this->height == other.height);
assert(this->bridge == other.bridge);
return float(this->bridge ?
0.5 * this->width + 0.5 * other.width + BRIDGE_EXTRA_SPACING :
0.5 * this->spacing() + 0.5 * other.spacing());
}
// This method returns extrusion volume per head move unit.
double Flow::mm3_per_mm() const
{
double res = this->bridge ?
// Area of a circle with dmr of this->width.
(this->width * this->width) * 0.25 * PI :
// Rectangle with semicircles at the ends. ~ h (w - 0.215 h)
this->height * (this->width - this->height * (1. - 0.25 * PI));
assert(res > 0.);
return res;
}
Flow support_material_flow(const PrintObject *object, float layer_height)
{
return Flow::new_from_config_width(
frSupportMaterial,
// The width parameter accepted by new_from_config_width is of type ConfigOptionFloatOrPercent, the Flow class takes care of the percent to value substitution.
(object->config.support_material_extrusion_width.value > 0) ? object->config.support_material_extrusion_width : object->config.extrusion_width,
// if object->config.support_material_extruder == 0 (which means to not trigger tool change, but use the current extruder instead), get_at will return the 0th component.
float(object->print()->config.nozzle_diameter.get_at(object->config.support_material_extruder-1)),
(layer_height > 0.f) ? layer_height : float(object->config.layer_height.value),
false);
}
Flow support_material_1st_layer_flow(const PrintObject *object, float layer_height)
{
const auto &width = (object->print()->config.first_layer_extrusion_width.value > 0) ? object->print()->config.first_layer_extrusion_width : object->config.support_material_extrusion_width;
return Flow::new_from_config_width(
frSupportMaterial,
// The width parameter accepted by new_from_config_width is of type ConfigOptionFloatOrPercent, the Flow class takes care of the percent to value substitution.
(width.value > 0) ? width : object->config.extrusion_width,
float(object->print()->config.nozzle_diameter.get_at(object->config.support_material_extruder-1)),
(layer_height > 0.f) ? layer_height : float(object->config.first_layer_height.get_abs_value(object->config.layer_height.value)),
false);
}
Flow support_material_interface_flow(const PrintObject *object, float layer_height)
{
return Flow::new_from_config_width(
frSupportMaterialInterface,
// The width parameter accepted by new_from_config_width is of type ConfigOptionFloatOrPercent, the Flow class takes care of the percent to value substitution.
(object->config.support_material_extrusion_width > 0) ? object->config.support_material_extrusion_width : object->config.extrusion_width,
// if object->config.support_material_interface_extruder == 0 (which means to not trigger tool change, but use the current extruder instead), get_at will return the 0th component.
float(object->print()->config.nozzle_diameter.get_at(object->config.support_material_interface_extruder-1)),
(layer_height > 0.f) ? layer_height : float(object->config.layer_height.value),
false);
}
}
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