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Vec4f @ 10817

Revision 10817, 8.5 kB (checked in by robert, 4 years ago)
From Chris Hanson, " Adds support for Vec /= Vec and Vec *= Vec operators to Vec2/Vec3/Vec4 double and float classes."
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1	/* --c++-- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2	*
3	* This library is open source and may be redistributed and/or modified under
4	* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5	* (at your option) any later version. The full license is in LICENSE file
6	* included with this distribution, and on the openscenegraph.org website.
7	*
8	* This library is distributed in the hope that it will be useful,
9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11	* OpenSceneGraph Public License for more details.
12	*/
13
14	#ifndef OSG_VEC4F
15	#define OSG_VEC4F 1
16
17	#include <osg/Vec3f>
18
19	namespace osg {
20
21	/** General purpose float quad. Uses include representation
22	* of color coordinates.
23	* No support yet added for float * Vec4f - is it necessary?
24	* Need to define a non-member non-friend operator* etc.
25	* Vec4f * float is okay
26	*/
27	class Vec4f
28	{
29	public:
30
31	/** Type of Vec class.*/
32	typedef float value_type;
33
34	/** Number of vector components. */
35	enum { num_components = 4 };
36
37	/** Vec member variable. */
38	value_type _v[4];
39
40	// Methods are defined here so that they are implicitly inlined
41
42	Vec4f() { _v[0]=0.0f; _v[1]=0.0f; _v[2]=0.0f; _v[3]=0.0f;}
43
44	Vec4f(value_type x, value_type y, value_type z, value_type w)
45	{
46	_v[0]=x;
47	_v[1]=y;
48	_v[2]=z;
49	_v[3]=w;
50	}
51
52	Vec4f(const Vec3f& v3,value_type w)
53	{
54	_v[0]=v3[0];
55	_v[1]=v3[1];
56	_v[2]=v3[2];
57	_v[3]=w;
58	}
59
60	inline bool operator == (const Vec4f& v) const { return _v[0]==v._v[0] && _v[1]==v._v[1] && _v[2]==v._v[2] && _v[3]==v._v[3]; }
61
62	inline bool operator != (const Vec4f& v) const { return _v[0]!=v._v[0] \|\| _v[1]!=v._v[1] \|\| _v[2]!=v._v[2] \|\| _v[3]!=v._v[3]; }
63
64	inline bool operator < (const Vec4f& v) const
65	{
66	if (_v[0]<v._v[0]) return true;
67	else if (_v[0]>v._v[0]) return false;
68	else if (_v[1]<v._v[1]) return true;
69	else if (_v[1]>v._v[1]) return false;
70	else if (_v[2]<v._v[2]) return true;
71	else if (_v[2]>v._v[2]) return false;
72	else return (_v[3]<v._v[3]);
73	}
74
75	inline value_type* ptr() { return _v; }
76	inline const value_type* ptr() const { return _v; }
77
78	inline void set( value_type x, value_type y, value_type z, value_type w)
79	{
80	_v[0]=x; _v[1]=y; _v[2]=z; _v[3]=w;
81	}
82
83	inline value_type& operator [] (unsigned int i) { return _v[i]; }
84	inline value_type operator [] (unsigned int i) const { return _v[i]; }
85
86	inline value_type& x() { return _v[0]; }
87	inline value_type& y() { return _v[1]; }
88	inline value_type& z() { return _v[2]; }
89	inline value_type& w() { return _v[3]; }
90
91	inline value_type x() const { return _v[0]; }
92	inline value_type y() const { return _v[1]; }
93	inline value_type z() const { return _v[2]; }
94	inline value_type w() const { return _v[3]; }
95
96	inline value_type& r() { return _v[0]; }
97	inline value_type& g() { return _v[1]; }
98	inline value_type& b() { return _v[2]; }
99	inline value_type& a() { return _v[3]; }
100
101	inline value_type r() const { return _v[0]; }
102	inline value_type g() const { return _v[1]; }
103	inline value_type b() const { return _v[2]; }
104	inline value_type a() const { return _v[3]; }
105
106	inline unsigned int asABGR() const
107	{
108	return (unsigned int)clampTo((_v[0]*255.0f),0.0f,255.0f)<<24 \|
109	(unsigned int)clampTo((_v[1]*255.0f),0.0f,255.0f)<<16 \|
110	(unsigned int)clampTo((_v[2]*255.0f),0.0f,255.0f)<<8 \|
111	(unsigned int)clampTo((_v[3]*255.0f),0.0f,255.0f);
112	}
113
114	inline unsigned int asRGBA() const
115	{
116	return (unsigned int)clampTo((_v[3]*255.0f),0.0f,255.0f)<<24 \|
117	(unsigned int)clampTo((_v[2]*255.0f),0.0f,255.0f)<<16 \|
118	(unsigned int)clampTo((_v[1]*255.0f),0.0f,255.0f)<<8 \|
119	(unsigned int)clampTo((_v[0]*255.0f),0.0f,255.0f);
120	}
121
122	inline bool valid() const { return !isNaN(); }
123	inline bool isNaN() const { return osg::isNaN(_v[0]) \|\| osg::isNaN(_v[1]) \|\| osg::isNaN(_v[2]) \|\| osg::isNaN(_v[3]); }
124
125	/** Dot product. */
126	inline value_type operator * (const Vec4f& rhs) const
127	{
128	return _v[0]*rhs._v[0]+
129	_v[1]*rhs._v[1]+
130	_v[2]*rhs._v[2]+
131	_v[3]*rhs._v[3] ;
132	}
133
134	/** Multiply by scalar. */
135	inline Vec4f operator * (value_type rhs) const
136	{
137	return Vec4f(_v[0]rhs, _v[1]rhs, _v[2]rhs, _v[3]rhs);
138	}
139
140	/** Unary multiply by scalar. */
141	inline Vec4f& operator *= (value_type rhs)
142	{
143	_v[0]*=rhs;
144	_v[1]*=rhs;
145	_v[2]*=rhs;
146	_v[3]*=rhs;
147	return *this;
148	}
149
150	/** Unary multiply by vector. */
151	inline Vec4f& operator *= (const Vec4f& rhs)
152	{
153	_v[0]*=rhs[0];
154	_v[1]*=rhs[1];
155	_v[2]*=rhs[2];
156	_v[3]*=rhs[3];
157	return *this;
158	}
159
160	/** Divide by scalar. */
161	inline Vec4f operator / (value_type rhs) const
162	{
163	return Vec4f(_v[0]/rhs, _v[1]/rhs, _v[2]/rhs, _v[3]/rhs);
164	}
165
166	/** Unary divide by scalar. */
167	inline Vec4f& operator /= (value_type rhs)
168	{
169	_v[0]/=rhs;
170	_v[1]/=rhs;
171	_v[2]/=rhs;
172	_v[3]/=rhs;
173	return *this;
174	}
175
176	/** Unary divide by vector. */
177	inline Vec4f& operator /= (const Vec4f& rhs)
178	{
179	_v[0]/=rhs[0];
180	_v[1]/=rhs[1];
181	_v[2]/=rhs[2];
182	_v[3]/=rhs[3];
183	return *this;
184	}
185
186	/** Binary vector add. */
187	inline Vec4f operator + (const Vec4f& rhs) const
188	{
189	return Vec4f(_v[0]+rhs._v[0], _v[1]+rhs._v[1],
190	_v[2]+rhs._v[2], _v[3]+rhs._v[3]);
191	}
192
193	/** Unary vector add. Slightly more efficient because no temporary
194	* intermediate object.
195	*/
196	inline Vec4f& operator += (const Vec4f& rhs)
197	{
198	_v[0] += rhs._v[0];
199	_v[1] += rhs._v[1];
200	_v[2] += rhs._v[2];
201	_v[3] += rhs._v[3];
202	return *this;
203	}
204
205	/** Binary vector subtract. */
206	inline Vec4f operator - (const Vec4f& rhs) const
207	{
208	return Vec4f(_v[0]-rhs._v[0], _v[1]-rhs._v[1],
209	_v[2]-rhs._v[2], _v[3]-rhs._v[3] );
210	}
211
212	/** Unary vector subtract. */
213	inline Vec4f& operator -= (const Vec4f& rhs)
214	{
215	_v[0]-=rhs._v[0];
216	_v[1]-=rhs._v[1];
217	_v[2]-=rhs._v[2];
218	_v[3]-=rhs._v[3];
219	return *this;
220	}
221
222	/** Negation operator. Returns the negative of the Vec4f. */
223	inline const Vec4f operator - () const
224	{
225	return Vec4f (-_v[0], -_v[1], -_v[2], -_v[3]);
226	}
227
228	/** Length of the vector = sqrt( vec . vec ) */
229	inline value_type length() const
230	{
231	return sqrtf( _v[0]_v[0] + _v[1]_v[1] + _v[2]_v[2] + _v[3]_v[3]);
232	}
233
234	/** Length squared of the vector = vec . vec */
235	inline value_type length2() const
236	{
237	return _v[0]_v[0] + _v[1]_v[1] + _v[2]_v[2] + _v[3]_v[3];
238	}
239
240	/** Normalize the vector so that it has length unity.
241	* Returns the previous length of the vector.
242	*/
243	inline value_type normalize()
244	{
245	value_type norm = Vec4f::length();
246	if (norm>0.0f)
247	{
248	value_type inv = 1.0f/norm;
249	_v[0] *= inv;
250	_v[1] *= inv;
251	_v[2] *= inv;
252	_v[3] *= inv;
253	}
254	return( norm );
255	}
256
257	}; // end of class Vec4f
258
259
260
261	/** Compute the dot product of a (Vec3,1.0) and a Vec4f. */
262	inline Vec4f::value_type operator * (const Vec3f& lhs,const Vec4f& rhs)
263	{
264	return lhs[0]rhs[0]+lhs[1]rhs[1]+lhs[2]*rhs[2]+rhs[3];
265	}
266
267	/** Compute the dot product of a Vec4f and a (Vec3,1.0). */
268	inline Vec4f::value_type operator * (const Vec4f& lhs,const Vec3f& rhs)
269	{
270	return lhs[0]rhs[0]+lhs[1]rhs[1]+lhs[2]*rhs[2]+lhs[3];
271	}
272
273	} // end of namespace osg
274
275	#endif
276

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