Difference between revisions of "LlVecDist"
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m (Updated a link to a video to actually provide the link rather than formatting that is broken.) |
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|constants | |constants | ||
|examples= | |examples= | ||
< | <source lang="lsl2"> | ||
default { | default { | ||
state_entry() | state_entry() | ||
| Line 21: | Line 21: | ||
} | } | ||
} | } | ||
</ | </source> | ||
<source lang="lsl2"> | |||
//To reset script on touch if the object has been rotated since the last script reset | |||
float gTolerance = 0.05; //This corresponds to about a 3 degree rotation | |||
default | |||
{ | |||
state_entry() | |||
{ | |||
llSetObjectDesc((string)llRot2Euler(llGetRot())); | |||
} | |||
touch_start(integer total_number) | |||
{ | |||
if (llVecDist(llRot2Euler(llGetRot()), (vector)llGetObjectDesc()) > gTolerance) | |||
{ | |||
llSay(0,"This object has rotated. Automatic reset engaged."); | |||
llResetScript(); | |||
} | |||
} | |||
}</source> | |||
===Video Tutorial=== | ===Video Tutorial=== | ||
https://www.youtube.com/watch?v=D0WvH58IWEo | |||
|helpers | |helpers | ||
|also_functions={{LSL DefineRow||[[llVecMag]]|}} | |also_functions={{LSL DefineRow||[[llVecMag]]|}} | ||
| Line 35: | Line 53: | ||
** [[llVecMag]]( vec_a - vec_b ) | ** [[llVecMag]]( vec_a - vec_b ) | ||
** [[llSqrt]]( (vec_b.x - vec_a.x) * (vec_b.x - vec_a.x) + (vec_b.y - vec_a.y) * (vec_b.y - vec_a.y) + (vec_b.z - vec_a.z) * (vec_b.z - vec_a.z) ) | ** [[llSqrt]]( (vec_b.x - vec_a.x) * (vec_b.x - vec_a.x) + (vec_b.y - vec_a.y) * (vec_b.y - vec_a.y) + (vec_b.z - vec_a.z) * (vec_b.z - vec_a.z) ) | ||
* Knowing this, there are ways to circumvent llVecDist for more efficient code. | |||
** For example, vector v3 = (v1-v2); v3*v3 < (f*f); is over twice as fast as llVecDist(v1,v2) < f; | |||
|cat1=Math/3D | |cat1=Math/3D | ||
|cat2=Vector | |cat2=Vector | ||
|haiku={{Haiku|Squirrel on a wire,|Skips from pole to distant pole.|One leap at a time.}} | |||
|cat3 | |cat3 | ||
|cat4 | |cat4 | ||
}} | }} | ||
Latest revision as of 19:41, 22 March 2022
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: float llVecDist( vector vec_a, vector vec_b );| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a float that is the undirected nonnegative distance between vec_a and vec_b.
| • vector | vec_a | – | Any valid vector | |
| • vector | vec_b | – | Any valid vector |
Examples
default {
state_entry()
{
vector input_1 = <1.0,2.0,3.0>;
vector input_2 = <3.0,2.0,1.0>;
llOwnerSay("The distance between " + (string) input_1 +
" and " + (string) input_2 + " is: "+(string)llVecDist(input_1, input_2) );
}
}
//To reset script on touch if the object has been rotated since the last script reset
float gTolerance = 0.05; //This corresponds to about a 3 degree rotation
default
{
state_entry()
{
llSetObjectDesc((string)llRot2Euler(llGetRot()));
}
touch_start(integer total_number)
{
if (llVecDist(llRot2Euler(llGetRot()), (vector)llGetObjectDesc()) > gTolerance)
{
llSay(0,"This object has rotated. Automatic reset engaged.");
llResetScript();
}
}
}
Video Tutorial
https://www.youtube.com/watch?v=D0WvH58IWEoNotes
- Mathematically equivalent to:
- Knowing this, there are ways to circumvent llVecDist for more efficient code.
- For example, vector v3 = (v1-v2); v3*v3 < (f*f); is over twice as fast as llVecDist(v1,v2) < f;
Deep Notes
Signature |
|---|
function float llVecDist( vector vec_a, vector vec_b ); |
Haiku |
|---|
|
Squirrel on a wire,
|