From ce89f22328aa546a6e0bdb905484b9e57a14756c Mon Sep 17 00:00:00 2001
From: Amira Abdel-Rahman <aabdelrahman@gsd.harvard.edu>
Date: Thu, 27 Jun 2019 10:27:07 -0400
Subject: [PATCH] added involute gear frep
---
cpp_frep/frep.cpp | 47 +++++++++++++++++++++++++++++++++++++++++++++++
cpp_frep/main.cpp | 4 +++-
2 files changed, 50 insertions(+), 1 deletion(-)
diff --git a/cpp_frep/frep.cpp b/cpp_frep/frep.cpp
index 1eb182c..59b88bc 100755
--- a/cpp_frep/frep.cpp
+++ b/cpp_frep/frep.cpp
@@ -152,6 +152,50 @@ namespace cpp_frep {
}
// private:
+ };
+
+ class InvoluteGear: public FrepPrimitive {
+ public:
+ scalar module =1.0f;
+ scalar angle =20.0f;
+ scalar teeth =10.0f;
+ scalar addendum =1.0f;
+ scalar dedendum =1.1f;
+ const float PI_F=3.14159265358979f;
+
+
+ InvoluteGear():module (1.0f), addendum (1.0f), dedendum (1.1f), angle (20.0f), teeth (10.0f) {
+ name="Rectangle";
+ };
+ InvoluteGear(scalar module_, scalar addendum_,scalar dedendum_,scalar angle_,scalar teeth_) {
+ module =module_;
+ angle =angle_;
+ teeth =teeth_;
+ addendum =addendum_;
+ dedendum =dedendum_;
+ name="Gear";
+ };
+
+ scalar eval(){
+ scalar rp = module*teeth/2.0f; // pitch radius
+ scalar rb = rp*cos(angle); // base radius
+ scalar ha = addendum*module; // addendum height
+ scalar hd= dedendum*module; // dedendum height
+ scalar ai = tan(angle)-angle; // involute angle
+ scalar ap = 2.0f*PI_F/teeth; // pitch angle
+
+ angle=PI_F*angle/180.0f;
+
+ scalar fn=std::max(std::min(std::min((rp+ha)-sqrtf(X*X+Y*Y),remainderf((PI_F+atan2f(Y,X)),ap)-(sqrtf(pow(std::max(rb,sqrtf(X*X+Y*Y))/rb,2.0)-1.0)-acosf(rb/std::max(rb,sqrt(X*X+Y*Y))))),-(sqrtf(powf(std::max(rb,sqrtf(X*X+Y*Y))/rb,2.0)-1.0)-acosf(rb/std::max(rb,sqrtf(X*X+Y*Y))))-(-(ap/2+2*ai)+remainderf((PI_F+atan2f(Y,X)),ap))),(rp-hd)-sqrtf(X*X+Y*Y));
+
+ return fn;
+ }
+
+ InvoluteGear get(){
+ return *this;
+ }
+ // private:
+
};
//..................................................................//
@@ -657,4 +701,7 @@ namespace cpp_frep {
};
//..................................................................//
+
+
+
}
diff --git a/cpp_frep/main.cpp b/cpp_frep/main.cpp
index 275057e..280c7ee 100755
--- a/cpp_frep/main.cpp
+++ b/cpp_frep/main.cpp
@@ -496,7 +496,9 @@ int main(int const, char const**) {
// drawFrep(tree,minX, maxX, minY, maxY, dx, dy,"final",false);
PolarArray pa2(&r,45.0f,0.5f);
- drawFrep(&pa2,minX, maxX, minY, maxY, dx, dy,"polar",true);
+ InvoluteGear gear( 1.0f, 1.0f, 1.1f, 20.0f, 8.0f) ;
+ Scale sc(&gear,0.0f,0.0f,0.25f,0.25f);
+ drawFrep(&sc,minX, maxX, minY, maxY, dx, dy,"gear",true);
tree.printGenome();
--
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