Lee Salzman
d632d96333
git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@915 e016b1c5-ed68-44aa-a2f7-31cac88cffde
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
struct vec
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{
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union
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{
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struct { float x, y, z; };
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float v[3];
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};
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vec() {}
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vec(float a, float b, float c) : x(a), y(b), z(c) {}
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vec(float *v) : x(v[0]), y(v[1]), z(v[2]) {}
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float &operator[](int i) { return v[i]; }
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float operator[](int i) const { return v[i]; }
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bool iszero() const { return x==0 && y==0 && z==0; }
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bool operator==(const vec &o) const { return x == o.x && y == o.y && z == o.z; }
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bool operator!=(const vec &o) const { return x != o.x || y != o.y || z != o.z; }
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vec &mul(float f) { x *= f; y *= f; z *= f; return *this; }
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vec &div(float f) { x /= f; y /= f; z /= f; return *this; }
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vec &add(float f) { x += f; y += f; z += f; return *this; }
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vec &sub(float f) { x -= f; y -= f; z -= f; return *this; }
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vec &add(const vec &o) { x += o.x; y += o.y; z += o.z; return *this; }
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vec &sub(const vec &o) { x -= o.x; y -= o.y; z -= o.z; return *this; }
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float squaredlen() const { return x*x + y*y + z*z; }
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float dot(const vec &o) const { return x*o.x + y*o.y + z*o.z; }
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float magnitude() const { return sqrtf(squaredlen()); }
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vec &normalize() { div(magnitude()); return *this; }
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float dist(const vec &e) const { vec t; return dist(e, t); }
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float dist(const vec &e, vec &t) const { t = *this; t.sub(e); return t.magnitude(); }
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float distxy(const vec &e) const { float dx = e.x - x, dy = e.y - y; return sqrtf(dx*dx + dy*dy); }
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bool reject(const vec &o, float max) const { return x>o.x+max || x<o.x-max || y>o.y+max || y<o.y-max; }
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};
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