vectorCrossProduct: Difference between revisions
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m (Text replacement - "|gr1= Vectors|GROUP1=" to "|gr2= Math - Vectors |GROUP2=") |
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{{Command|Comments= | {{Command|Comments= | ||
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|gr2= Math - Vectors |GROUP2= | |gr2= Math - Vectors |GROUP2= | ||
| Cross product of two 3D vectors. | | Cross product of two 3D vectors. | ||
<br>In layman's terms, if you have a polygon (surface) defined by 3 points, you can find a normal to it (just like terrain [[surfaceNormal]]). To invert direction of the normal, swap arguments around. |DESCRIPTION= | <br>In layman's terms, if you have a polygon (surface) defined by 3 points, you can find a normal to it (just like terrain [[surfaceNormal]]). To invert direction of the normal, swap arguments around. |DESCRIPTION= | ||
| vector1 [[vectorCrossProduct]] vector2 |SYNTAX= | | vector1 [[vectorCrossProduct]] vector2 |SYNTAX= | ||
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|x1= <code>_vector = [1,1,1] [[vectorCrossProduct]] [2,2,2];</code> |EXAMPLE1= | |x1= <code>_vector = [1,1,1] [[vectorCrossProduct]] [2,2,2];</code> |EXAMPLE1= | ||
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|x3= <code>_vectorSide = ([[vectorDir]] [[player]]) [[vectorCrossProduct]] ([[vectorUp]] [[player]]);</code> |EXAMPLE3= | |x3= <code>_vectorSide = ([[vectorDir]] [[player]]) [[vectorCrossProduct]] ([[vectorUp]] [[player]]);</code> |EXAMPLE3= | ||
| [[vectorAdd]], [[vectorDiff]], [[vectorDotProduct]], [[vectorCos]], [[vectorMagnitude]], [[vectorMagnitudeSqr]], [[vectorMultiply]], [[vectorDistance]], [[vectorDistanceSqr]], [[vectorDir]], [[vectorUp]], [[setVectorDir]], [[setVectorUp]], [[setVectorDirAndUp]], [[vectorNormalized]], [[vectorFromTo]], [[matrixMultiply]], [[matrixTranspose]] |SEEALSO= | | [[vectorAdd]], [[vectorDiff]], [[vectorDotProduct]], [[vectorCos]], [[vectorMagnitude]], [[vectorMagnitudeSqr]], [[vectorMultiply]], [[vectorDistance]], [[vectorDistanceSqr]], [[vectorDir]], [[vectorUp]], [[setVectorDir]], [[setVectorUp]], [[setVectorDirAndUp]], [[vectorNormalized]], [[vectorFromTo]], [[matrixMultiply]], [[matrixTranspose]] |SEEALSO= | ||
Revision as of 04:23, 17 January 2021
Description
- Description:
- Cross product of two 3D vectors.
In layman's terms, if you have a polygon (surface) defined by 3 points, you can find a normal to it (just like terrain surfaceNormal). To invert direction of the normal, swap arguments around. - Groups:
- Math - Vectors
Syntax
- Syntax:
- vector1 vectorCrossProduct vector2
- Parameters:
- vector1: Array - in form [x, y, z] or 2D (since Arma 3 v1.99.146539, z coordinate is defaulted to 0)
- vector2: Array - in form [x, y, z] or 2D (since Arma 3 v1.99.146539, z coordinate is defaulted to 0)
- Return Value:
- Array - vector [x, y, z]
Examples
- Example 1:
_vector = [1,1,1] vectorCrossProduct [2,2,2];- Example 2:
_vectorUp = [0,1,0] vectorCrossProduct [-1,0,0]; //[0,-0,1]- Example 3:
_vectorSide = (vectorDir player) vectorCrossProduct (vectorUp player);
Additional Information
- See also:
- vectorAddvectorDiffvectorDotProductvectorCosvectorMagnitudevectorMagnitudeSqrvectorMultiplyvectorDistancevectorDistanceSqrvectorDirvectorUpsetVectorDirsetVectorUpsetVectorDirAndUpvectorNormalizedvectorFromTomatrixMultiplymatrixTranspose
Notes
-
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Only post proven facts here! Add Note
Notes
- Posted on 28 Jun, 2014
- ffur2007slx2_5
-
(ArmA3 1.22)Algorithm:
Vector1 = [x1,y1,z1]; Vector2 = [x2,y2,z2]; Result = [(y1 * z2) – (z1 * y2),(z1 * x2) – (x1 * z2),(x1 * y2) – (y1 * x2)];It is recommended to use vectorCrossProduct instead of BIS_fnc_crossProduct.