dali.math — dali 0.7.4

abs clj

(abs x)

atan2 clj

(atan2 x y)

cartesian->polar clj

(cartesian->polar [x y])

cos clj

(cos x)

The cosine of angle x (in degrees)

degrees->radians clj

(degrees->radians x)

determinant-2x2 clj

(determinant-2x2 [[a b] [c d]])

The determinant of a 2x2 matrix.

linear-equation-at-x clj

(linear-equation-at-x {:keys [slope offset]} x)

Calculates the y value according to a linear equation based on the passed x value. The equation information is passed as a map with :slope and :offset keys.

minus clj

(minus x)

Makes all the numbers of a seq negative and returns it as a vector

polar->cartesian clj

(polar->cartesian [r theta])

polar-angle clj

(polar-angle [x y])

radians->degrees clj

(radians->degrees x)

sin clj

(sin x)

The sine of angle x (in degrees)

solve-2x2-system clj

(solve-2x2-system [cx1 cy1 con1] [cx2 cy2 con2])

Solves a 2x2 system of equations. cx is the coeffient of x, cy is the coefficient of y, and the con variables are the constant values.

sqrt clj

(sqrt x)

within clj

(within x [a b])

(within x [a b] error)

Tests whether x is within the range of a and b. a can be less or more than b. The optional error parameter extends both sides of the range by error.