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[191] | 1 | #ifndef __RECTANGLE3_H
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| 2 | #define __RECTANGLE3_H
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[245] | 3 | #include <iostream>
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| 4 | using namespace std;
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[191] | 5 | #include "Vector3.h"
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| 6 |
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[209] | 7 | /// rectangle vertices
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| 8 | // 3 2
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| 9 | // 0 1
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[191] | 10 | class Rectangle3 {
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| 11 | public:
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| 12 | Vector3 mVertices[4];
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| 13 |
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[245] | 14 | Vector3 GetVertex(const int i) const { return mVertices[i]; }
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[209] | 15 | Rectangle3() {}
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| 16 |
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[191] | 17 | Rectangle3(const Vector3 &v0,
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| 18 | const Vector3 &v1,
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| 19 | const Vector3 &v2,
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| 20 | const Vector3 &v3) {
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| 21 | mVertices[0] = v0;
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| 22 | mVertices[1] = v1;
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| 23 | mVertices[2] = v2;
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| 24 | mVertices[3] = v3;
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| 25 | }
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| 26 |
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[245] | 27 | Vector3 GetNormal() const {
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[191] | 28 | return Normalize(CrossProd(mVertices[0]-mVertices[1],
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| 29 | mVertices[2]-mVertices[1]
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| 30 | ));
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| 31 | }
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| 32 |
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[245] | 33 | Vector3 GetCenter() const {
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[191] | 34 | return (mVertices[0] + mVertices[1] + mVertices[2] + mVertices[3])/4.0f;
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| 35 | }
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| 36 |
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[245] | 37 | int DominantAxis() const {
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| 38 | if (SqrMagnitude(mVertices[0] - mVertices[1]) > SqrMagnitude(mVertices[0] - mVertices[3]))
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| 39 | return 0;
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| 40 | else
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| 41 | return 1;
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| 42 | }
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| 43 |
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| 44 | float GetArea() const {
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| 45 | Vector3 v = CrossProd(mVertices[3], mVertices[0]);
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| 46 |
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| 47 | for (int i=0; i < 3; i++)
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| 48 | v += CrossProd(mVertices[i], mVertices[i+1]);
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| 49 |
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| 50 | return 0.5f*abs(DotProd(GetNormal(), v));
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| 51 | }
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| 52 |
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[209] | 53 | void
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| 54 | Split(const int axis,
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| 55 | Rectangle3 &r1,
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| 56 | Rectangle3 &r2
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[223] | 57 | ) const;
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[245] | 58 |
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| 59 | friend ostream& operator<< (ostream &s, const Rectangle3 &r) {
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| 60 | return s<<"Rectangle3:"<<r.mVertices[0]<<r.mVertices[1]<<r.mVertices[2]<<r.mVertices[3];
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| 61 | }
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| 62 |
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[191] | 63 | };
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| 64 |
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| 65 |
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| 66 | #endif
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