###### Descriptions and Examples for the POV-Ray Raytracerby Friedrich A. Lohmüller     POV-Ray Examples - How To Make Objects for POV-Ray
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Index of Content
- Geometry
- Pawn
- Wireframe Cube
- Octagon
- Egg Shape
- Star
- Optical Lens
- Chessboard
- Round-bottom Mace
- Erlenmeyer Shape
- Two-Cylinder-Blob
- Regular Tetrahedron
- Penrose Triangle
- Yin & Yang
- Fishblob
- Threefold
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# Two cylinders melting together - Two-Cylinder-Blob -

###### The construction of the shape of two cylinders melting smoothly together - a combination of two cylinder with a rounded fillet between them. Objects:   "box", "cylinder". Methods: "#declare","union", "intersection" "#macro". Click here for an example!

The Construction of two melting Cylinders.
A cross-section with the geometry of this construction you can see on the opposite image.
For more details on the elementary geometry
look here: Tangent Circles.

 ```//--------------------------------------- #macro Two_Cylinder_Blob_0( Pitch, // distance of centers SD, // slice thickness in z Cyl_R, // cylinder radius Fillet_R , // fillet radius Axis_R, // 0) difference{ #end //---------------------------------- union{ cylinder{ <0,0,-SD/2>,<0,0,SD/2>,Cyl_R translate< Pitch/2,0,0>} cylinder{ <0,0,-SD/2>,<0,0,SD/2>,Cyl_R translate<-Pitch/2,0,0>} difference{ // 2 box{<-S_X,-S_Y,-SD/2>, } cylinder{ <0,0,-SD/2-D>, <0,0,SD/2+D>, Fillet_R translate<0, Fillet_Y,0>} cylinder{ <0,0,-SD/2-D>, <0,0,SD/2+D>, Fillet_R translate<0,-Fillet_Y,0>} } // end difference 2 } // end union ------------------------- #if (Axis_R > 0) cylinder{<0,0,-SD-D>,<0,0,SD/2+D>,Axis_R translate< Pitch/2,0,0>} cylinder{<0,0,-SD-D>,<0,0,SD/2+D>,Axis_R translate<-Pitch/2,0,0>} } // end of difference or union #end // of 'Axis_R > 0' #end //--------------------- end of macro //--------------------------------------- // example://---------------------------- object{ Two_Cylinder_Blob_0 ( 0.0127, // Pitch distance 0.0009, // slice thickness 0.0051, // cylinder radius 0.0081, // fillet radius 0.0022, // axis r, //< cylinder r, 0=non )//----------------------------- texture{ pigment{ color rgb<1,1,1>} finish { phong 1.0} } // end of texture rotate<0,0,0> translate<0,0,0> } // end of sphere ---------------- //---------------------------------------```
Two cylinders melting together
- Two-Cylinder-Blob.

Using Round_Cylinders and Torus_Segments
for the borders completes the construction to
object{Two_Cylinder_Blob_1( ...)}

This shape in a macro as a

What is this good for?
Here an example:

Chain link for a bike chain

An application of this macro as a