annotate src/vmath.cc @ 1:a826bf0fb169
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| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Sat, 05 Apr 2014 09:05:26 +0300 |
| parents |
2a5340a6eee4 |
| children |
d94a69933a71 |
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1 #include "vmathmat.h"
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2 #include "vmath.h"
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3
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4 void Matrix4x4::lookat(const Vector3 &pos, const Vector3 &targ, const Vector3 &up)
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5 {
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6 Vector3 vk = normalize(targ - pos);
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7 Vector3 vj = normalize(up);
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8 Vector3 vi = normalize(cross(vk, vj));
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9 vj = cross(vi, vk);
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10
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11 Matrix4x4 m(
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12 vi.x, vi.y, vi.z, 0,
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13 vj.x, vj.y, vj.z, 0,
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14 -vk.x, -vk.y, -vk.z, 0,
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15 0, 0, 0, 1);
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16 translate(-pos.x, -pos.y, -pos.z);
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17 *this = *this * m;
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18 }
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