8766335708
Better for reallllly wide screens and multiscreen setups, apparently. Also, let's merge with v-r while we're at it, since llcamera.h requires a large-ish recompile Nothing functional though. And some license updates to some identical files in llmath.
110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/**
|
|
* @file llplane.h
|
|
*
|
|
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
|
|
* Second Life Viewer Source Code
|
|
* Copyright (C) 2010, Linden Research, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License only.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
|
|
* $/LicenseInfo$
|
|
*/
|
|
|
|
#ifndef LL_LLPLANE_H
|
|
#define LL_LLPLANE_H
|
|
|
|
#include "v3math.h"
|
|
#include "v4math.h"
|
|
|
|
// A simple way to specify a plane is to give its normal,
|
|
// and it's nearest approach to the origin.
|
|
//
|
|
// Given the equation for a plane : A*x + B*y + C*z + D = 0
|
|
// The plane normal = [A, B, C]
|
|
// The closest approach = D / sqrt(A*A + B*B + C*C)
|
|
|
|
|
|
LL_ALIGN_PREFIX(16)
|
|
class LLPlane
|
|
{
|
|
public:
|
|
|
|
// Constructors
|
|
LLPlane() {}; // no default constructor
|
|
LLPlane(const LLVector3 &p0, F32 d) { setVec(p0, d); }
|
|
LLPlane(const LLVector3 &p0, const LLVector3 &n) { setVec(p0, n); }
|
|
inline void setVec(const LLVector3 &p0, F32 d) { mV.set(p0[0], p0[1], p0[2], d); }
|
|
|
|
// Set
|
|
inline void setVec(const LLVector3 &p0, const LLVector3 &n)
|
|
{
|
|
F32 d = -(p0 * n);
|
|
setVec(n, d);
|
|
}
|
|
inline void setVec(const LLVector3 &p0, const LLVector3 &p1, const LLVector3 &p2)
|
|
{
|
|
LLVector3 u, v, w;
|
|
u = p1 - p0;
|
|
v = p2 - p0;
|
|
w = u % v;
|
|
w.normVec();
|
|
F32 d = -(w * p0);
|
|
setVec(w, d);
|
|
}
|
|
|
|
inline LLPlane& operator=(const LLVector4& v2) { mV.set(v2[0],v2[1],v2[2],v2[3]); return *this;}
|
|
|
|
inline LLPlane& operator=(const LLVector4a& v2) { mV.set(v2[0],v2[1],v2[2],v2[3]); return *this;}
|
|
|
|
inline void set(const LLPlane& p2) { mV = p2.mV; }
|
|
|
|
//
|
|
F32 dist(const LLVector3 &v2) const { return mV[0]*v2[0] + mV[1]*v2[1] + mV[2]*v2[2] + mV[3]; }
|
|
|
|
inline LLSimdScalar dot3(const LLVector4a& b) const { return mV.dot3(b); }
|
|
|
|
// Read-only access a single float in this vector. Do not use in proximity to any function call that manipulates
|
|
// the data at the whole vector level or you will incur a substantial penalty. Consider using the splat functions instead
|
|
inline F32 operator[](const S32 idx) const { return mV[idx]; }
|
|
|
|
// preferable when index is known at compile time
|
|
template <int N> LL_FORCE_INLINE void getAt(LLSimdScalar& v) const { v = mV.getScalarAt<N>(); }
|
|
|
|
// reset the vector to 0, 0, 0, 1
|
|
inline void clear() { mV.set(0, 0, 0, 1); }
|
|
|
|
inline void getVector3(LLVector3& vec) const { vec.set(mV[0], mV[1], mV[2]); }
|
|
|
|
// Retrieve the mask indicating which of the x, y, or z axis are greater or equal to zero.
|
|
inline U8 calcPlaneMask() const
|
|
{
|
|
return mV.greaterEqual(LLVector4a::getZero()).getGatheredBits() & LLVector4Logical::MASK_XYZ;
|
|
}
|
|
|
|
//check if two planes are nearly same
|
|
bool equal(const LLPlane& p) const
|
|
{
|
|
return mV.equals4(p.mV);
|
|
}
|
|
|
|
private:
|
|
LLVector4a mV;
|
|
} LL_ALIGN_POSTFIX(16);
|
|
|
|
|
|
|
|
#endif // LL_LLPLANE_H
|