===== Primitive: Cone with x-axis =====

**Definition**: <m>(x-x_0)^2-(y-y_0)^2/R^2-(z-z_0)^2/R^2</m>

**Call**: hfConeX(x,center,R);

**Parameters**:

x - point coordinates array

center - cone apex array

R - cone radius at height=1 

**Test file**: [[http://hyperfun.org/cone.hf|cone.hf]]

===== Primitive: Cone with y-axis =====

**Definition**: <m>(y-y_0)^2-(x-x_0)^2/R^2-(z-z_0)^2/R^2</m>

**Call**: hfConeY(x,center,R);

**Parameters**:

x - point coordinates array

center - cone apex array

R - cone radius at height=1 

**Test file**: [[http://hyperfun.org/cone.hf|cone.hf]]

===== Primitive: Cone with z-axis =====

**Definition**: <m>(z-z_0)^2-(x-x_0)^2/R^2-(y-y_0)^2/R^2</m>

**Call**: hfConeZ(x,center,R);

**Parameters**:

x - point coordinates array

center - cone apex array

R - cone radius at height=1 

**Test file**: [[http://hyperfun.org/cone.hf|cone.hf]]