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Lamp

Description and decomposition

To model the lamp I decomposed it in three parts:
- the upper part of the lamp
- the lower part of the lamp
- the bulb(and the wire)

Functions used

Before building the various parts of this object I found useful to implement variuos support functions. One of them, the CIRCLE_BEZIER allows me to create a circle with Bezier curves, by passing the radius and the Z coordinate on which I desire to obtain this circle. 


function CIRCLE_BEZIER(r,z){
	var rot_domain = DOMAIN([[0,1],[0,2*PI]])([40,40]);
	
	var p1 = [[r,0,z],[r*COS(PI/12),r*SIN(PI/12),z], [r*COS(PI/6),r*SIN(PI/6),z], [r*COS(PI/4),r*SIN(PI/4),z], [r*COS(PI/3),r*SIN(PI/3),z], [r*COS(5*PI/12),r*SIN(5*PI/12),z], [0,r,z]];
	
	var c1 = BEZIER(S0)(p1);
	
	return c1;
};
With this function I modeled the upper and the lower part of the lamp, in combination with the BEZIER function and a simple mapping. Then, to model the bulb, I used the ROTATIONAL_SURFACE function: 


	//Other code..
	var domain = DOMAIN([[0,1],[0,2*PI]])([20,20]);
	var profile = BEZIER(S0)([[0,0,0],[0.5,0,0.5],[2,0,2],[2,0,4],[0,0,5]]);
	var mapping = ROTATIONAL_SURFACE(profile);
	var surface = MAP(mapping)(domain);
    //Other code..
Structuring all these parts, I obtained the lamp.

Sources

Source code

Pictures