quinta-feira, 28 de abril de 2011

Criando uma saia flex

Nessa parte da aula iremos aprender a criar uma saia flex usando o prim flex da outra aula.
Vamos precisar também do script looprez, encontrado nesse blog.

Looprez script otimizado para a aula:

// LoopRez v0.6, by Ged Larsen, 20 December 2006
// - rez a number of objects in an ellipse, whose size is determined by xRadius and yRadius
// - all facing "outwards", along a tangent to the ellipse
// - can set how much the objects flare outwards
// - properly handles object rotation corrections (for example, X-axis 180 degree rotation helps for flexi-prim skirts)
// - can also get a 'saddle' bend, to generate a bend that might help for necklaces (from Ariane Brodie)
// To use:
// 1) create a prim that will contain this script and the object to use
// 2) put the script into the prim
// 3) create an object that will be used, and name it "Object"
// 4) put "Object" into the prim containing the script, by dragging it from your inventory
// 5) get out of Edit Mode, and touch the prim
// Random note:
// - this version does NOT insure equal spacing of objects along the perimeter of the ellipse
// - i.e., objects "bunch up" at the long ends of an ellipse; the effect should be acceptable for non-extreme ellipses
// - even spacing of objects can be accomplished, but requires simulation of integral calculus, which slows down the script
// References:
// - tangent formulas from: http://mathworld.wolfram.com/Ellipse.html

// CONFIGURATION PARAMETERS, change these to your liking

string objectName = "saia"; // objeto a ser copiado
integer numObjects = 12; // quantidade de objetos
float xRadius = 0.23; // elipse eixo-x
float yRadius = 0.17; // elipse eixo-y
float flareAngle = 40.0; // grau de inclinacao
float bendCoefficient = 0.0; // coeficiente de dobramento
vector rotOffset = <0.0, 180.0, 0.0>; // rotacao
vector posOffset = <0.0, 0.0, 0.6>; // posicao

// No need to mess with anything below here

integer n; // which object is being placed
float theta; // angle in radians
vector pos; // position
rotation rot; // rotation in quaternion format

for(n = 0; n < numObjects; n++) {

theta = TWO_PI * ( (float)n / (float)numObjects );

pos.x = xRadius * llCos(theta); // ellipse: 2x xRadius meters wide
pos.y = yRadius * llSin(theta); // ellipse: 2x yRadius meters wide
pos.z = -bendCoefficient*llCos(theta)*llCos(theta); // saddle shape, bending downwards on X-axis
pos = pos + llGetPos() + posOffset;

rot = llEuler2Rot(<rotOffset.x*DEG_TO_RAD, rotOffset.y*DEG_TO_RAD, rotOffset.z*DEG_TO_RAD>); // user-chosen rotation offset correction
rot = rot * llEuler2Rot(<0, -1*flareAngle*DEG_TO_RAD, 0>); // flare generation (poof)

// the following make the objects face outwards properly for an ellipse; using theta alone is only correct for a circle
// the scary formula calculates a unit vector TANGENTIAL to the ellipse, and llRotBetween is used to figure out how much the object needs to rotate to lie parallel to the tangent
rot = rot * llRotBetween(<0.0,1.0,0.0>, <-1.0 * xRadius * llSin(theta) / ( llSqrt ( (yRadius*yRadius * llCos(theta) * llCos(theta)) + (xRadius*xRadius * llSin(theta) * llSin(theta))) ),yRadius * llCos(theta) / ( llSqrt ( (yRadius*yRadius * llCos(theta) * llCos(theta)) + (xRadius*xRadius * llSin(theta) * llSin(theta))) ),0.0>);
if ( n== (numObjects/2) ) // LSL's implementation of llRotBetween at theta = pi radians is reversed at 180 degrees, so this manually corrects it
rot = rot * llEuler2Rot( <0,PI,0> );

llRezObject(objectName, pos, ZERO_VECTOR, rot, 0);

touch_start(integer total_number)
if (llDetectedOwner(0) == llGetOwner())

36 comentários:

IsaK ( .e. ) disse...

Muito bom muito bom ^^

Anônimo disse...

ola boa tarde, muito bom o seu script, mas tenho uma duvida, o meu esta invertido as prims ou seja a saia esta sendo criada mas invertida a parte que seria para dentro esta para fora, se poder me dar uma luz, pois ja tentei de tudo...abs...

Jeniffer disse...

O meu está a mesma coisa, como fazer pra inverter? Obrigada

Eliz disse...

Apesar da saia ficar na orientação correta quando a geramos, ao "vestir" a saia pela primeira vez no avatar ela fica invertida, sendo necessário ajustar por meio do clique com o botão direito > Editar, e pressionando enquanto gira com o mouse, fazendo todos os ajustes necessários.

Eliz disse...

Corrigindo o que eu disse no comentário anterior, a tecla a ser pressionada enquanto gira com o mouse é Ctrl.
Como consertar as falhas que aparecem ao redor da cintura do avatar? Pensei em talvez colocar uma roupa de baixo na mesma tonalidade/textura, ou adicionar mais prims através da edição do script... alguém tem outra alternativa para solucionar esse problema?

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