[1378] | 1 | #ifndef NX_COLLISION_NXTRIANGLE
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| 2 | #define NX_COLLISION_NXTRIANGLE
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| 3 | /*----------------------------------------------------------------------------*\
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| 4 | |
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| 5 | | Public Interface to NovodeX Technology
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| 6 | |
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| 7 | | www.novodex.com
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| 8 | |
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| 9 | \*----------------------------------------------------------------------------*/
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| 10 | /** \addtogroup physics
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| 11 | @{
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| 12 | */
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| 13 |
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| 14 | #include "Nxp.h"
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| 15 |
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| 16 | #define NX_INV3 0.33333333333333333333f //!< 1/3
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| 17 |
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| 18 | /**
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| 19 | \brief Triangle class.
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| 20 |
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| 21 | @see NxTriangleMesh NxTriangleMeshDesc
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| 22 | */
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| 23 | class NxTriangle
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| 24 | {
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| 25 | public:
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| 26 | /**
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| 27 | \brief Constructor
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| 28 | */
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| 29 | NX_INLINE NxTriangle()
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| 30 | {
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| 31 | }
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| 32 | /**
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| 33 | \brief Constructor
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| 34 |
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| 35 | \param[in] p0 Point 0
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| 36 | \param[in] p1 Point 1
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| 37 | \param[in] p2 Point 2
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| 38 | */
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| 39 | NX_INLINE NxTriangle(const NxVec3& p0, const NxVec3& p1, const NxVec3& p2)
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| 40 | {
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| 41 | verts[0] = p0;
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| 42 | verts[1] = p1;
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| 43 | verts[2] = p2;
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| 44 | }
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| 45 | /**
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| 46 | \brief Copy constructor
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| 47 |
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| 48 | \param[in] triangle Tri to copy
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| 49 | */
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| 50 | NX_INLINE NxTriangle(const NxTriangle& triangle)
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| 51 | {
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| 52 | verts[0] = triangle.verts[0];
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| 53 | verts[1] = triangle.verts[1];
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| 54 | verts[2] = triangle.verts[2];
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| 55 | }
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| 56 | /**
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| 57 | \brief Destructor
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| 58 | */
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| 59 | NX_INLINE ~NxTriangle()
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| 60 | {
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| 61 | }
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| 62 |
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| 63 | /**
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| 64 | \brief Array of Vertices.
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| 65 | */
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| 66 | NxVec3 verts[3];
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| 67 |
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| 68 | /**
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| 69 | \brief Compute the centre of the NxTriangle.
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| 70 |
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| 71 | \param[out] center Retrieve centre(average) point of triangle.
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| 72 | */
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| 73 | NX_INLINE void center(NxVec3& center) const
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| 74 | {
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| 75 | center = (verts[0] + verts[1] + verts[2])*NX_INV3;
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| 76 | }
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| 77 |
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| 78 | /**
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| 79 | \brief Compute the normal of the NxTriangle.
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| 80 |
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| 81 | \param[out] _normal Triangle normal.
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| 82 | */
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| 83 | NX_INLINE void normal(NxVec3& _normal) const
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| 84 | {
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| 85 | _normal = (verts[1]-verts[0])^(verts[2]-verts[0]);
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| 86 | _normal.normalize();
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| 87 | }
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| 88 |
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| 89 | /**
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| 90 | \brief Makes a fat triangle
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| 91 |
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| 92 | \param[in] fatCoeff Amount to inflate triangle by.
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| 93 | \param[in] constantBorder True - Add same width independant of tri size. False - Add bigger borders to biggers triangles.
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| 94 | */
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| 95 | NX_INLINE void inflate(float fatCoeff, bool constantBorder)
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| 96 | {
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| 97 | // Compute triangle center
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| 98 | NxVec3 triangleCenter;
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| 99 | center(triangleCenter);
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| 100 |
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| 101 | // Don't normalize?
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| 102 | // Normalize => add a constant border, regardless of triangle size
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| 103 | // Don't => add more to big triangles
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| 104 | for(unsigned i=0;i<3;i++)
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| 105 | {
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| 106 | NxVec3 v = verts[i] - triangleCenter;
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| 107 |
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| 108 | if(constantBorder) v.normalize();
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| 109 |
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| 110 | verts[i] += v * fatCoeff;
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| 111 | }
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| 112 | }
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| 113 | };
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| 114 |
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| 115 | /** @} */
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| 116 | #endif
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| 117 |
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| 118 |
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| 119 | //AGCOPYRIGHTBEGIN
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| 120 | ///////////////////////////////////////////////////////////////////////////
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| 121 | // Copyright © 2005 AGEIA Technologies.
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| 122 | // All rights reserved. www.ageia.com
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| 123 | ///////////////////////////////////////////////////////////////////////////
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| 124 | //AGCOPYRIGHTEND
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| 125 |
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