Revision 3107,
798 bytes
checked in by mattausch, 16 years ago
(diff) |
added converter for vbo format from ralf
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[3107] | 1 | #include "SimpleTri.h"
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| 2 |
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| 3 |
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| 4 | using namespace std;
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| 5 |
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| 6 |
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| 7 | SimpleTri::SimpleTri(const SimpleVec &a, const SimpleVec &b, const SimpleVec &c)
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| 8 | {
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| 9 | Init(a, b, c);
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| 10 | }
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| 11 |
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| 12 |
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| 13 | void SimpleTri::Init(const SimpleVec &a, const SimpleVec &b, const SimpleVec &c)
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| 14 | {
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| 15 | mVertices[0] = a;
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| 16 | mVertices[1] = b;
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| 17 | mVertices[2] = c;
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| 18 | }
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| 19 |
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| 20 |
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| 21 | SimpleVec SimpleTri::GetNormal() const
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| 22 | {
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| 23 | const SimpleVec v1 = mVertices[0] - mVertices[1];
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| 24 | const SimpleVec v2 = mVertices[2] - mVertices[1];
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| 25 |
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| 26 | return Normalize(CrossProd(v2, v1));
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| 27 | }
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| 28 |
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| 29 |
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| 30 | SimpleVec SimpleTri::GetWorldCenter() const
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| 31 | {
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| 32 | return (mVertices[0] + mVertices[1] + mVertices[2]) / 3.0f;
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| 33 | }
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| 34 |
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| 35 |
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| 36 | float SimpleTri::GetArea() const
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| 37 | {
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| 38 | SimpleVec v1 = mVertices[0] - mVertices[1], v2=mVertices[2] - mVertices[1];
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| 39 | return 0.5f * Magnitude(CrossProd(v2, v1));
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| 40 | }
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| 41 |
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