comparison: types.cpp
types.cpp
- changeset 64
- ada4679d5bce
- child 113
- bbaa40226ec9
equal
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| 63:aa40ce18f869 | 64:ada4679d5bce |
|---|---|
| 1 #include <assert.h> | |
| 2 #include "common.h" | |
| 3 #include "types.h" | |
| 4 #include "misc.h" | |
| 5 | |
| 6 // ============================================================================= | |
| 7 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 8 // ============================================================================= | |
| 9 vertex vertex::midpoint (vertex& other) { | |
| 10 vertex mid; | |
| 11 mid.x = (x + other.x); | |
| 12 mid.y = (y + other.y); | |
| 13 mid.z = (z + other.z); | |
| 14 return mid; | |
| 15 } | |
| 16 | |
| 17 // ============================================================================= | |
| 18 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 19 // ============================================================================= | |
| 20 str vertex::getStringRep (const bool bMangled) { | |
| 21 const char* sFormat = (bMangled) ? "(%s, %s, %s)" : "%s %s %s"; | |
| 22 | |
| 23 return str::mkfmt (sFormat, | |
| 24 ftoa (x).chars(), | |
| 25 ftoa (y).chars(), | |
| 26 ftoa (z).chars()); | |
| 27 } | |
| 28 | |
| 29 // ============================================================================= | |
| 30 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 31 // ============================================================================= | |
| 32 void vertex::transform (matrix mMatrix, vertex pos) { | |
| 33 double x2, y2, z2; | |
| 34 x2 = (mMatrix[0] * x) + (mMatrix[1] * y) + (mMatrix[2] * z) + pos.x; | |
| 35 y2 = (mMatrix[3] * x) + (mMatrix[4] * y) + (mMatrix[5] * z) + pos.y; | |
| 36 z2 = (mMatrix[6] * x) + (mMatrix[7] * y) + (mMatrix[8] * z) + pos.z; | |
| 37 | |
| 38 x = x2; | |
| 39 y = y2; | |
| 40 z = z2; | |
| 41 } | |
| 42 | |
| 43 // ============================================================================= | |
| 44 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 45 // ============================================================================= | |
| 46 matrix::matrix (vector<double> vals) { | |
| 47 assert (vals.size() == (sizeof faValues / sizeof *faValues)); | |
| 48 memcpy (&faValues[0], &(*vals.begin ()), sizeof faValues); | |
| 49 } | |
| 50 | |
| 51 // ----------------------------------------------------------------------------- | |
| 52 matrix::matrix (double fVal) { | |
| 53 for (short i = 0; i < 9; ++i) | |
| 54 faValues[i] = fVal; | |
| 55 } | |
| 56 | |
| 57 // ----------------------------------------------------------------------------- | |
| 58 matrix::matrix (double a, double b, double c, double d, double e, double f, | |
| 59 double g, double h, double i) | |
| 60 { | |
| 61 faValues[0] = a; faValues[1] = b; faValues[2] = c; | |
| 62 faValues[3] = d; faValues[4] = e; faValues[5] = f; | |
| 63 faValues[6] = g; faValues[7] = h; faValues[8] = i; | |
| 64 } | |
| 65 | |
| 66 // ============================================================================= | |
| 67 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 68 // ============================================================================= | |
| 69 void matrix::zero () { | |
| 70 memset (&faValues[0], 0, sizeof faValues); | |
| 71 } | |
| 72 | |
| 73 // ============================================================================= | |
| 74 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 75 // ============================================================================= | |
| 76 matrix matrix::mult (matrix mOther) { | |
| 77 matrix mVal; | |
| 78 matrix& mThis = *this; | |
| 79 | |
| 80 mVal.zero (); | |
| 81 | |
| 82 // arrrrrrrrrrrgh | |
| 83 for (short i = 0; i < 3; ++i) | |
| 84 for (short j = 0; j < 3; ++j) | |
| 85 for (short k = 0; k < 3; ++k) | |
| 86 mVal[(i * 3) + j] += mThis[(i * 3) + k] * mOther[(k * 3) + j]; | |
| 87 | |
| 88 return mVal; | |
| 89 } | |
| 90 | |
| 91 // ============================================================================= | |
| 92 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
| 93 // ============================================================================= | |
| 94 void matrix::testOutput () { | |
| 95 for (short i = 0; i < 3; ++i) { | |
| 96 for (short j = 0; j < 3; ++j) | |
| 97 printf ("%*f\t", 10, faValues[(i * 3) + j]); | |
| 98 | |
| 99 printf ("\n"); | |
| 100 } | |
| 101 } |
