# Difference between revisions of "Talk:LlVecDist"

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(example script fDistanceOfPointFromLine) |
(added simpler solution) |
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</lsl> | </lsl> | ||

--[[User:MartinRJ Fayray|MartinRJ Fayray]] 11:49, 1 April 2013 (PDT) | --[[User:MartinRJ Fayray|MartinRJ Fayray]] 11:49, 1 April 2013 (PDT) | ||

+ | |||

+ | Here's a simpler solution using cross products: | ||

+ | <lsl> | ||

+ | float fDistanceOfPointFromLine(vector veca, vector vecb, vector vecc) | ||

+ | { //vecc is the point | ||

+ | float A = llVecMag((veca-vecc)%(vecb-vecc)); | ||

+ | return A / llVecMag(vecb-veca); | ||

+ | } | ||

+ | </lsl> | ||

+ | --[[User:MartinRJ Fayray|MartinRJ Fayray]] 11:58, 1 April 2013 (PDT) |

## Latest revision as of 11:58, 1 April 2013

### Example script to calculate the distance of a vector-point from a 'line' (using Heron's formula)

<lsl> float fDistanceOfPointFromLine(vector veca, vector vecb, vector vecc) { //vecc is the point (veca and vecb are points on the line)

float a = llVecDist(vecb, vecc); float b = llVecDist(veca, vecc); float c = llVecDist(veca, vecb); float s=(1.0/2.0)*(a+b+c); float hc =(2.0/c)*llSqrt(s*(s-a)*(s-b)*(s-c)); return hc;

} </lsl> --MartinRJ Fayray 11:49, 1 April 2013 (PDT)

Here's a simpler solution using cross products: <lsl> float fDistanceOfPointFromLine(vector veca, vector vecb, vector vecc) { //vecc is the point

float A = llVecMag((veca-vecc)%(vecb-vecc)); return A / llVecMag(vecb-veca);

} </lsl> --MartinRJ Fayray 11:58, 1 April 2013 (PDT)