improve curling model parameters,

other small improvements

src/libslic3r/SupportSpotsGenerator.hpp

@@ -10,22 +10,22 @@ namespace SupportSpotsGenerator {
 struct Params {
     const float gravity_constant = 9806.65f; // mm/s^2; gravity acceleration on Earth's surface, algorithm assumes that printer is in upwards position.
 
-    float bridge_distance = 10.0f; //mm
-    float bridge_distance_decrease_by_curvature_factor = 5.0f; // allowed bridge distance = bridge_distance / (this factor * (curvature / PI) )
+    const float bridge_distance = 12.0f; //mm
+    const float bridge_distance_decrease_by_curvature_factor = 5.0f; // allowed bridge distance = bridge_distance / (this factor * (curvature / PI) )
 
-    float min_distance_between_support_points = 3.0f;
+    const float min_distance_between_support_points = 3.0f;
 
     // Adhesion computation : from experiment, PLA holds about 3g per mm^2 of base area (with reserve); So it can withstand about 3*gravity_constant force per mm^2
-    float base_adhesion = 3.0f * gravity_constant; // adhesion per mm^2 of first layer
-    float support_adhesion = 1.0f * gravity_constant; // adhesion per mm^2 of support interface layer
+    const float base_adhesion = 3.0f * gravity_constant; // adhesion per mm^2 of first layer
+    const float support_adhesion = 1.0f * gravity_constant; // adhesion per mm^2 of support interface layer
 
-    float support_points_interface_radius = 1.0f; // mm
+    const float support_points_interface_radius = 0.3f; // mm
 
-    float max_acceleration = 9*1000.0f; // mm/s^2 ; max acceleration of object (bed) in XY (NOTE: The max hit is received by the object in the jerk phase, so the usual machine limits are too low)
-    float filament_density = 1.25f * 0.001f; // g/mm^3  ; Common filaments are very lightweight, so precise number is not that important
-    float tensile_strength = 33000.0f; // mN/mm^2;    33 MPa is tensile strength of ABS, which has the lowest tensile strength from common materials.
-    float tolerable_extruder_conflict_force = 50.0f * gravity_constant; // force that can occasionally push the model due to various factors (filament leaks, small curling, ... ); current value corresponds to weight of X grams
-    float malformations_additive_conflict_extruder_force = 100.0f * gravity_constant; // for areas with possible high layered curled filaments
+    const float max_acceleration = 9*1000.0f; // mm/s^2 ; max acceleration of object (bed) in XY (NOTE: The max hit is received by the object in the jerk phase, so the usual machine limits are too low)
+    const float filament_density = 1.25f * 0.001f; // g/mm^3  ; Common filaments are very lightweight, so precise number is not that important
+    const float tensile_strength = 33000.0f; // mN/mm^2;    33 MPa is tensile strength of ABS, which has the lowest tensile strength from common materials.
+    const float tolerable_extruder_conflict_force = 50.0f * gravity_constant; // force that can occasionally push the model due to various factors (filament leaks, small curling, ... ); current value corresponds to weight of X grams
+    const float malformations_additive_conflict_extruder_force = 100.0f * gravity_constant; // for areas with possible high layered curled filaments
 
 };