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cone, taper
general syntax:
cone{<x1,y1,z1>,r1,<x2,y2,z2>, r2
texture{ ... ... }
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Here <x1,y1,z1> und <x2,y2,z2>
are the coordinates of the centers of the ends,
r1 and r2 are the according radii.
If we chose for one on the both radius the value 0, you will get a cone with a tip at this end.
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The examples here:
//---------------the golden cone ------
cone{<-1,2,-3>,1.0,<4,4,5>,0.0
texture{Polished_Chrome
pigment{color rgb<1,0.8,0>}
normal {bumps 0.5 scale 0.15}
finish {phong 1}
}
} //----------------------------------------
//-------- the violet reflecting cone --------
cone{ <0,0,0>,1.0,<0,2,0>,0.5
texture{ Polished_Chrome
pigment{color rgb<1,0,0.5>}
normal {crackle 0.5 scale 0.15}
finish {phong 1}
}
translate<2,0,0>
} //-------------------------------------- |
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Tip:To buildt a cone which is parallel to one of the axis of the coordinatensystem but
not in zero position, this can be done in a more difficult way but also in an easier way (see also "cylinder"):
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The most times worse style:
Start and end point of the cone are definded by their final values
=> the length and the position is hard to understand!
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cone{<4,2,2>,0.5, <4,2,5>,1.0
texture{ ... ... } } |
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The better style much easier to understand is better done according to this
principle of construction:
1st step: modellizzing (length and radius) the body at zero and then
2nd step: moving the body to it's final position.
In this case the instructions better to understand would be the following :
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cone{ <0,0,0>,0.5, <0,0,3>,1.0
translate<4,2,2>
texture{ ... ... } } |
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Special Effect: If we choose one of the terminal radii negative,
we are getting a double cone:
cone{ <0,0,0>,0.5, <0,1.00,0>,-0.2
texture{ pigment{ color rgb<0.8,0.55,1.0>*0.75}
finish { phong 0.4}
} // end of texture
scale <1,1,1> rotate<0,0,0> translate<0,0,0>
} // end of cone --------------------------------- |
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Special Effect II: If we the optional command "open",
we get an open cone:
cone{ <0,0,0>, 0.3, <0,1.00,0>, 0.5 open
texture{ pigment{ color rgb<0.8,1.0,0.25>*0.75}
finish { phong 0.4}
} // end of texture
scale <1,1,1> rotate<0,0,0> translate<0,0,0>
} // end of cone -------------------------------- |
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