Armagetron Advanced: PDDisc Class Reference

PDDisc::PDDisc	(	const pVec &	ctr0,
		const pVec	nrm0,
		const float	radOut0,
		const float	radIn0 = `0.0f`
	)			`[inline]`

Definition at line 578 of file pDomain.h.

References D, dif, fabsf(), fsqr(), pVec::normalize(), nrm, p, radIn, radInSqr, radOut, radOutSqr, u, and v.

Referenced by copy().

00579     {
00580         p = ctr0;
00581         nrm = nrm0;
00582         nrm.normalize();
00583 
00584         if(radOut0 > radIn0) {
00585             radOut = radOut0; radIn = radIn0;
00586         } else {
00587             radOut = radIn0; radIn = radOut0;
00588         }
00589         dif = radOut - radIn;
00590         radInSqr = fsqr(radIn);
00591         radOutSqr = fsqr(radOut);
00592 
00593         // Find a vector orthogonal to n.
00594         pVec basis(1.0f, 0.0f, 0.0f);
00595         if (fabsf(basis * nrm) > 0.999f)
00596             basis = pVec(0.0f, 1.0f, 0.0f);
00597 
00598         // Project away N component, normalize and cross to get
00599         // second orthonormal vector.
00600         u = basis - nrm * (basis * nrm);
00601         u.normalize();
00602         v = Cross(nrm, u);
00603         D = -(p * nrm);
00604     }

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PDDisc::~PDDisc ( ) [inline]

Definition at line 606 of file pDomain.h.

00607     {
00608     }

bool PDDisc::Within ( const pVec & pos ) const [inline, virtual]

Implements pDomain.

Definition at line 610 of file pDomain.h.

00611     {
00612         return false;
00613     }

pVec PDDisc::Generate ( ) const [inline, virtual]

Implements pDomain.

Definition at line 615 of file pDomain.h.

References cosf(), dif, M_PI, p, pos, pRandf, radIn, sinf(), u, v, and x.

00616     {
00617         // Might be faster to generate a point in a square and reject if outside the circle
00618         float theta = pRandf() * 2.0f * float(M_PI); // Angle around normal
00619         // Distance from center
00620         float r = radIn + pRandf() * dif;
00621 
00622         float x = r * cosf(theta); // Weighting of each frame vector
00623         float y = r * sinf(theta);
00624 
00625         pVec pos = p + u * x + v * y;
00626         return pos;
00627     }

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pDomain* PDDisc::copy ( ) const [inline, virtual]

Implements pDomain.

Definition at line 629 of file pDomain.h.

References PDDisc().

00630     {
00631         PDDisc *P = new PDDisc(*this);
00632         return P;
00633     }

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pVec PDDisc::p

Definition at line 574 of file pDomain.h.

Referenced by PABounce::Exec(), PAAvoid::Exec(), Generate(), and PDDisc().

pVec PDDisc::nrm

Definition at line 574 of file pDomain.h.

Referenced by PABounce::Exec(), PAAvoid::Exec(), and PDDisc().

pVec PDDisc::u

Definition at line 574 of file pDomain.h.

Referenced by Generate(), and PDDisc().

pVec PDDisc::v

Definition at line 574 of file pDomain.h.

Referenced by Generate(), and PDDisc().

float PDDisc::radIn