1 // Created by: Kirill GAVRILOV
2 // Copyright (c) 2013-2014 OPEN CASCADE SAS
4 // This file is part of Open CASCADE Technology software library.
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License version 2.1 as published
8 // by the Free Software Foundation, with special exception defined in the file
9 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
10 // distribution for complete text of the license and disclaimer of any warranty.
12 // Alternatively, this file may be used under the terms of Open CASCADE
13 // commercial license or contractual agreement.
15 #ifndef _NCollection_Vec4_H__
16 #define _NCollection_Vec4_H__
18 #include <NCollection_Vec3.hxx>
20 //! Generic 4-components vector.
21 //! To be used as RGBA color vector or XYZW 3D-point with special W-component
22 //! for operations with projection / model view matrices.
23 //! Use this class for 3D-points carefully because declared W-component may
24 //! results in incorrect results if used without matrices.
25 template<typename Element_t>
26 class NCollection_Vec4
31 //! Returns the number of components.
37 //! Empty constructor. Construct the zero vector.
40 std::memset (this, 0, sizeof(NCollection_Vec4));
43 //! Initialize ALL components of vector within specified value.
44 explicit NCollection_Vec4 (const Element_t theValue)
46 v[0] = v[1] = v[2] = v[3] = theValue;
49 //! Per-component constructor.
50 explicit NCollection_Vec4 (const Element_t theX,
61 //! Constructor from 2-components vector.
62 explicit NCollection_Vec4 (const NCollection_Vec2<Element_t>& theVec2)
66 v[2] = v[3] = Element_t (0);
69 //! Constructor from 3-components vector + optional 4th value.
70 explicit NCollection_Vec4(const NCollection_Vec3<Element_t>& theVec3, const Element_t theW = Element_t(0))
72 std::memcpy (this, &theVec3, sizeof(NCollection_Vec3<Element_t>));
76 //! Assign new values to the vector.
77 void SetValues (const Element_t theX,
88 //! Assign new values as 3-component vector and a 4-th value.
89 void SetValues (const NCollection_Vec3<Element_t>& theVec3, const Element_t theW)
97 //! Alias to 1st component as X coordinate in XYZW.
98 Element_t x() const { return v[0]; }
100 //! Alias to 1st component as RED channel in RGBA.
101 Element_t r() const { return v[0]; }
103 //! Alias to 2nd component as Y coordinate in XYZW.
104 Element_t y() const { return v[1]; }
106 //! Alias to 2nd component as GREEN channel in RGBA.
107 Element_t g() const { return v[1]; }
109 //! Alias to 3rd component as Z coordinate in XYZW.
110 Element_t z() const { return v[2]; }
112 //! Alias to 3rd component as BLUE channel in RGBA.
113 Element_t b() const { return v[2]; }
115 //! Alias to 4th component as W coordinate in XYZW.
116 Element_t w() const { return v[3]; }
118 //! Alias to 4th component as ALPHA channel in RGBA.
119 Element_t a() const { return v[3]; }
121 //! @return 2 of XYZW components in specified order as vector in GLSL-style
122 NCOLLECTION_VEC_COMPONENTS_2D(x, y)
123 NCOLLECTION_VEC_COMPONENTS_2D(x, z)
124 NCOLLECTION_VEC_COMPONENTS_2D(x, w)
125 NCOLLECTION_VEC_COMPONENTS_2D(y, z)
126 NCOLLECTION_VEC_COMPONENTS_2D(y, w)
127 NCOLLECTION_VEC_COMPONENTS_2D(z, w)
129 //! @return 3 of XYZW components in specified order as vector in GLSL-style
130 NCOLLECTION_VEC_COMPONENTS_3D(x, y, z)
131 NCOLLECTION_VEC_COMPONENTS_3D(x, y, w)
132 NCOLLECTION_VEC_COMPONENTS_3D(x, z, w)
133 NCOLLECTION_VEC_COMPONENTS_3D(y, z, w)
135 //! @return RGB components as vector
136 NCOLLECTION_VEC_COMPONENTS_3D(r, g, b)
138 //! Alias to 1st component as X coordinate in XYZW.
139 Element_t& x() { return v[0]; }
141 //! Alias to 1st component as RED channel in RGBA.
142 Element_t& r() { return v[0]; }
144 //! Alias to 2nd component as Y coordinate in XYZW.
145 Element_t& y() { return v[1]; }
147 //! Alias to 2nd component as GREEN channel in RGBA.
148 Element_t& g() { return v[1]; } // Green color
150 //! Alias to 3rd component as Z coordinate in XYZW.
151 Element_t& z() { return v[2]; }
153 //! Alias to 3rd component as BLUE channel in RGBA.
154 Element_t& b() { return v[2]; }
156 //! Alias to 4th component as W coordinate in XYZW.
157 Element_t& w() { return v[3]; }
159 //! Alias to 4th component as ALPHA channel in RGBA.
160 Element_t& a() { return v[3]; }
162 //! Check this vector with another vector for equality (without tolerance!).
163 bool IsEqual (const NCollection_Vec4& theOther) const
165 return v[0] == theOther.v[0]
166 && v[1] == theOther.v[1]
167 && v[2] == theOther.v[2]
168 && v[3] == theOther.v[3];
171 //! Check this vector with another vector for equality (without tolerance!).
172 bool operator== (const NCollection_Vec4& theOther) { return IsEqual (theOther); }
173 bool operator== (const NCollection_Vec4& theOther) const { return IsEqual (theOther); }
175 //! Check this vector with another vector for non-equality (without tolerance!).
176 bool operator!= (const NCollection_Vec4& theOther) { return !IsEqual (theOther); }
177 bool operator!= (const NCollection_Vec4& theOther) const { return !IsEqual (theOther); }
179 //! Raw access to the data (for OpenGL exchange).
180 const Element_t* GetData() const { return v; }
181 Element_t* ChangeData() { return v; }
182 operator const Element_t*() const { return v; }
183 operator Element_t*() { return v; }
185 //! Compute per-component summary.
186 NCollection_Vec4& operator+= (const NCollection_Vec4& theAdd)
195 //! Compute per-component summary.
196 friend NCollection_Vec4 operator+ (const NCollection_Vec4& theLeft,
197 const NCollection_Vec4& theRight)
199 NCollection_Vec4 aSumm = NCollection_Vec4 (theLeft);
200 return aSumm += theRight;
204 NCollection_Vec4 operator-() const
206 return NCollection_Vec4 (-x(), -y(), -z(), -w());
209 //! Compute per-component subtraction.
210 NCollection_Vec4& operator-= (const NCollection_Vec4& theDec)
219 //! Compute per-component subtraction.
220 friend NCollection_Vec4 operator- (const NCollection_Vec4& theLeft,
221 const NCollection_Vec4& theRight)
223 NCollection_Vec4 aSumm = NCollection_Vec4 (theLeft);
224 return aSumm -= theRight;
227 //! Compute per-component multiplication.
228 NCollection_Vec4& operator*= (const NCollection_Vec4& theRight)
230 v[0] *= theRight.v[0];
231 v[1] *= theRight.v[1];
232 v[2] *= theRight.v[2];
233 v[3] *= theRight.v[3];
237 //! Compute per-component multiplication.
238 friend NCollection_Vec4 operator* (const NCollection_Vec4& theLeft,
239 const NCollection_Vec4& theRight)
241 NCollection_Vec4 aResult = NCollection_Vec4 (theLeft);
242 return aResult *= theRight;
245 //! Compute per-component multiplication.
246 void Multiply (const Element_t theFactor)
254 //! Compute per-component multiplication.
255 NCollection_Vec4& operator*=(const Element_t theFactor)
257 Multiply (theFactor);
261 //! Compute per-component multiplication.
262 NCollection_Vec4 operator* (const Element_t theFactor) const
264 return Multiplied (theFactor);
267 //! Compute per-component multiplication.
268 NCollection_Vec4 Multiplied (const Element_t theFactor) const
270 NCollection_Vec4 aCopyVec4 (*this);
271 aCopyVec4 *= theFactor;
275 //! Compute component-wise minimum of two vectors.
276 NCollection_Vec4 cwiseMin (const NCollection_Vec4& theVec) const
278 return NCollection_Vec4 (v[0] < theVec.v[0] ? v[0] : theVec.v[0],
279 v[1] < theVec.v[1] ? v[1] : theVec.v[1],
280 v[2] < theVec.v[2] ? v[2] : theVec.v[2],
281 v[3] < theVec.v[3] ? v[3] : theVec.v[3]);
284 //! Compute component-wise maximum of two vectors.
285 NCollection_Vec4 cwiseMax (const NCollection_Vec4& theVec) const
287 return NCollection_Vec4 (v[0] > theVec.v[0] ? v[0] : theVec.v[0],
288 v[1] > theVec.v[1] ? v[1] : theVec.v[1],
289 v[2] > theVec.v[2] ? v[2] : theVec.v[2],
290 v[3] > theVec.v[3] ? v[3] : theVec.v[3]);
293 //! Compute component-wise modulus of the vector.
294 NCollection_Vec4 cwiseAbs() const
296 return NCollection_Vec4 (std::abs (v[0]),
302 //! Compute maximum component of the vector.
303 Element_t maxComp() const
305 const Element_t aMax1 = v[0] > v[1] ? v[0] : v[1];
306 const Element_t aMax2 = v[2] > v[3] ? v[2] : v[3];
308 return aMax1 > aMax2 ? aMax1 : aMax2;
311 //! Compute minimum component of the vector.
312 Element_t minComp() const
314 const Element_t aMin1 = v[0] < v[1] ? v[0] : v[1];
315 const Element_t aMin2 = v[2] < v[3] ? v[2] : v[3];
317 return aMin1 < aMin2 ? aMin1 : aMin2;
320 //! Computes the dot product.
321 Element_t Dot (const NCollection_Vec4& theOther) const
323 return x() * theOther.x() +
329 //! Compute per-component division by scale factor.
330 NCollection_Vec4& operator/= (const Element_t theInvFactor)
332 v[0] /= theInvFactor;
333 v[1] /= theInvFactor;
334 v[2] /= theInvFactor;
335 v[3] /= theInvFactor;
339 //! Compute per-component division by scale factor.
340 NCollection_Vec4 operator/ (const Element_t theInvFactor)
342 NCollection_Vec4 aResult(*this);
343 return aResult /= theInvFactor;
348 Element_t v[4]; //!< define the vector as array to avoid structure alignment issues
352 //! Optimized concretization for float type.
353 template<> inline NCollection_Vec4<float>& NCollection_Vec4<float>::operator/= (const float theInvFactor)
355 Multiply (1.0f / theInvFactor);
359 //! Optimized concretization for double type.
360 template<> inline NCollection_Vec4<double>& NCollection_Vec4<double>::operator/= (const double theInvFactor)
362 Multiply (1.0 / theInvFactor);
366 #endif // _NCollection_Vec4_H__