pointcloud_tools_10-Point_Cloud_Attribute_Calculator

Point Cloud Attribute Calculator

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contributed at 2018-11-06

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Detailed Description

The Point Cloud Attribute Calculator calculates a new attribute based on existing attributes and a mathematical formula. Attribute fields are addressed by the character 'f' (for 'field') followed by the field number (i.e.: f1, f2, ..., fn) or by the field name in square brackets (e.g.: [Field Name]).Examples:sin(f1) * f2 + f3[intensity] / 1000The following operators are available for the formula definition:

+Addition
-Subtraction
*Multiplication
/Division
abs(x)Absolute Value
mod(x, y)Returns the floating point remainder of x/y
int(x)Returns the integer part of floating point value x
sqr(x)Square
sqrt(x)Square Root
exp(x)Exponential
pow(x, y)Returns x raised to the power of y
x ^ yReturns x raised to the power of y
ln(x)Natural Logarithm
log(x)Base 10 Logarithm
pi()Returns the value of Pi
sin(x)Sine
cos(x)Cosine
tan(x)Tangent
asin(x)Arcsine
acos(x)Arccosine
atan(x)Arctangent
atan2(x, y)Arctangent of x/y
min(x, y)Returns the minimum of values x and y
max(x, y)Returns the maximum of values x and y
gt(x, y)Returns true (1), if x is greater than y, else false (0)
x > yReturns true (1), if x is greater than y, else false (0)
lt(x, y)Returns true (1), if x is less than y, else false (0)
x < yReturns true (1), if x is less than y, else false (0)
eq(x, y)Returns true (1), if x equals y, else false (0)
x = yReturns true (1), if x equals y, else false (0)
and(x, y)Returns true (1), if both x and y are true (i.e. not 0)
or(x, y)Returns true (1), if at least one of both x and y is true (i.e. not 0)
ifelse(c, x, y)Returns x, if condition c is true (i.e. not 0), else y
rand_u(x, y)Random number, uniform distribution with minimum x and maximum y
rand_g(x, y)Random number, Gaussian distribution with mean x and standard deviation y

How to cite

SAGA (2018). pointcloud_tools_10-Point_Cloud_Attribute_Calculator, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/b290b3ad-ab7a-4497-8e12-2523f0139797
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contributed at 2018-11-06

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