Difference between revisions of "Category:LSL Vector"

Revision as of 15:16, 1 April 2023

LSL Portal

Vector

A vector is a data type that contains a set of three float values.

Components

Each element can be accessed individually by appending .x, .y, or .z to the variable name.

vector vec = <1, 2, 3>;
float x = vec.x; // 1.0
float y = vec.y; // 2.0
float z = vec.z; // 3.0

Uses

Vectors can be used to hold the following:

Position: x, y, and z are in metres.
Velocity: x, y, and z are in meters per second.
Colour: x is Red, y is Green, and z is Blue.

Operators

Vectors support the following operations:

Addition, Operator "+"

vector v = <1, 2, 3> + <0.5, 0.0, 3> // <1.5, 2.0, 6.0>

Subtraction, Operator "-"

vector v = <1, 1, 1> - <0.5, 0.0, 3> // <0.5, 1.0, -2.0>

Dot Product, Operator "*"

float f = <9, 2, 7> * <4, 8, 10> // 122.0

Cross Product, Operator "%"

float f = <2, 3, 4> * <5, 6, 7> // 56.0

Scalar

A vector can be multiplied or divided by a Float or Integer to scale it.

Each component of the vector will be multiplied or divided by the same value.

vector v = <1, 2, 3> * 1.5 // <1.5, 3.0, 4.5>

Rotation

A vector can be multiplied or divided by a Quaternion to rotate it.

// 45-degree rotation around the Z (up) axis
rotation r = llEuler2Rot(<0, 0, 45> * DEG_TO_RAD);

// Vector whose direction is 1 meter to the east
vector v = <1, 0, 0>;

// Vector whose direction is north-east
vector rotated = v * r; // <0.707107, 0.707107, 0.000000>

Useful Snippets

Check whether a string value is a valid vector:

integer IsVector(string s)
{
    list split = llParseString2List(s, [" "], ["<", ">", ","]);
    if(llGetListLength(split) != 7)//we must check the list length, or the next test won't work properly.
        return FALSE;
    return !((string)((vector)s) == (string)((vector)((string)llListInsertList(split, ["-"], 5))));
    //it works by trying to flip the sign on the Z element of the vector,
    //if it works or breaks the vector then the values won't match.
    //if the vector was already broken then the sign flip will have no affect and the values will match
    //we cast back to string so we can catch negative zero which allows for support of ZERO_VECTOR
}//Strife Onizuka

Subcategories

This category has the following 2 subcategories, out of 2 total.

D

LSL Vector/direction

V

LSL Functions/Returns a vector

Pages in category "LSL Vector"

The following 6 pages are in this category, out of 6 total.

T

V

Z

ZERO VECTOR

@@ Line 7: / Line 7: @@
 Each element can be accessed individually by appending .x, .y, or .z to the variable name.
-<syntaxhighlight lang="lsl2">vector vec;
+<syntaxhighlight lang="lsl2">
-float x = vec.x;
+vector vec = <1, 2, 3>;
-float y = vec.y;
+float x = vec.x; // 1.0
-float z = vec.z;</syntaxhighlight>
+float y = vec.y; // 2.0
+float z = vec.z; // 3.0
+</syntaxhighlight>
 ===Uses===
 Vectors can be used to hold the following:
-* {{LSLGC|Movement|Position}}: x, y and z are in metres.
+* {{LSLGC|Movement|Position}}: x, y, and z are in metres.
-* {{LSLGC|Movement|Velocity}}: x, y and z represent speeds.
+* {{LSLGC|Movement|Velocity}}: x, y, and z are in meters per second.
-* {{LSLGC|Color|Colour}}: Red is x, Green is y and Blue is z.
+* {{LSLGC|Color|Colour}}: x is Red, y is Green, and z is Blue.
 ===Operators===
 Vectors support the following operations:
-* Addition, Operator "+"
+==== Addition, Operator "+" ====
-* Subtraction, Operator "-"
+<syntaxhighlight lang="lsl2">
-* Multiplication (Dot Product), Operator "*"
+vector v = <1, 2, 3> + <0.5, 0.0, 3> // <1.5, 2.0, 6.0>
-* Cross Product, Operator "%"
+</syntaxhighlight>
+==== Subtraction, Operator "-" ====
+<syntaxhighlight lang="lsl2">
+vector v = <1, 1, 1> - <0.5, 0.0, 3> // <0.5, 1.0, -2.0>
+</syntaxhighlight>
+==== Dot Product, Operator "*" ====
+<syntaxhighlight lang="lsl2">
+float f = <9, 2, 7> * <4, 8, 10> // 122.0
+</syntaxhighlight>
+==== Cross Product, Operator "%" ====
+<syntaxhighlight lang="lsl2">
+float f = <2, 3, 4> * <5, 6, 7> // 56.0
+</syntaxhighlight>
+==== Scalar ====
+A vector can be multiplied or divided by a [[Float]] or [[Integer]] to scale it.
+Each component of the vector will be multiplied or divided by the same value.
+<syntaxhighlight lang="lsl2">
+vector v = <1, 2, 3> * 1.5 // <1.5, 3.0, 4.5>
+</syntaxhighlight>
+==== Rotation ====
 A vector can be multiplied or divided by a [[Quaternion]] to rotate it.
+<syntaxhighlight lang="lsl2">
+// 45-degree rotation around the Z (up) axis
+rotation r = llEuler2Rot(<0, 0, 45> * DEG_TO_RAD);
-A vector can be multiplied or divided by a [[Float]] or [[Integer]] to scale it.
+// Vector whose direction is 1 meter to the east
+vector v = <1, 0, 0>;
-===Example===
+// Vector whose direction is north-east
-<syntaxhighlight lang="lsl2">vector test=<1.0, 2.0, 3.0>;
+vector rotated = v * r; // <0.707107, 0.707107, 0.000000>
-llOwnerSay((string)test.z); // Outputs 3.0</syntaxhighlight>
+</syntaxhighlight>
 ===Useful Snippets===
+Check whether a string value is a valid vector:
 <syntaxhighlight lang="lsl2">integer IsVector(string s)
 {