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.
70 explicit NCollection_Vec4(const NCollection_Vec3<Element_t>& theVec3)
72 std::memcpy (this, &theVec3, sizeof(NCollection_Vec3<Element_t>));
76 //! Constructor from 3-components vector + alpha value.
77 explicit NCollection_Vec4(const NCollection_Vec3<Element_t>& theVec3,
78 const Element_t theAlpha) {
79 std::memcpy (this, &theVec3, sizeof(NCollection_Vec3<Element_t>));
83 //! Assign new values to the vector.
84 void SetValues (const Element_t theX,
95 //! Alias to 1st component as X coordinate in XYZW.
96 Element_t x() const { return v[0]; }
98 //! Alias to 1st component as RED channel in RGBA.
99 Element_t r() const { return v[0]; }
101 //! Alias to 2nd component as Y coordinate in XYZW.
102 Element_t y() const { return v[1]; }
104 //! Alias to 2nd component as GREEN channel in RGBA.
105 Element_t g() const { return v[1]; }
107 //! Alias to 3rd component as Z coordinate in XYZW.
108 Element_t z() const { return v[2]; }
110 //! Alias to 3rd component as BLUE channel in RGBA.
111 Element_t b() const { return v[2]; }
113 //! Alias to 4th component as W coordinate in XYZW.
114 Element_t w() const { return v[3]; }
116 //! Alias to 4th component as ALPHA channel in RGBA.
117 Element_t a() const { return v[3]; }
119 //! @return 2 of XYZW components in specified order as vector in GLSL-style
120 NCOLLECTION_VEC_COMPONENTS_2D(x, y)
121 NCOLLECTION_VEC_COMPONENTS_2D(x, z)
122 NCOLLECTION_VEC_COMPONENTS_2D(x, w)
123 NCOLLECTION_VEC_COMPONENTS_2D(y, z)
124 NCOLLECTION_VEC_COMPONENTS_2D(y, w)
125 NCOLLECTION_VEC_COMPONENTS_2D(z, w)
127 //! @return 3 of XYZW components in specified order as vector in GLSL-style
128 NCOLLECTION_VEC_COMPONENTS_3D(x, y, z)
129 NCOLLECTION_VEC_COMPONENTS_3D(x, y, w)
130 NCOLLECTION_VEC_COMPONENTS_3D(x, z, w)
131 NCOLLECTION_VEC_COMPONENTS_3D(y, z, w)
133 //! @return RGB components as vector
134 NCOLLECTION_VEC_COMPONENTS_3D(r, g, b)
136 //! Alias to 1st component as X coordinate in XYZW.
137 Element_t& x() { return v[0]; }
139 //! Alias to 1st component as RED channel in RGBA.
140 Element_t& r() { return v[0]; }
142 //! Alias to 2nd component as Y coordinate in XYZW.
143 Element_t& y() { return v[1]; }
145 //! Alias to 2nd component as GREEN channel in RGBA.
146 Element_t& g() { return v[1]; } // Green color
148 //! Alias to 3rd component as Z coordinate in XYZW.
149 Element_t& z() { return v[2]; }
151 //! Alias to 3rd component as BLUE channel in RGBA.
152 Element_t& b() { return v[2]; }
154 //! Alias to 4th component as W coordinate in XYZW.
155 Element_t& w() { return v[3]; }
157 //! Alias to 4th component as ALPHA channel in RGBA.
158 Element_t& a() { return v[3]; }
160 //! @return XY-components modifiable vector
161 NCollection_Vec2<Element_t>& xy()
163 return *((NCollection_Vec2<Element_t>* )&v[0]);
166 //! @return YZ-components modifiable vector
167 NCollection_Vec2<Element_t>& yz()
169 return *((NCollection_Vec2<Element_t>* )&v[1]);
172 //! @return YZ-components modifiable vector
173 NCollection_Vec2<Element_t>& zw()
175 return *((NCollection_Vec2<Element_t>* )&v[2]);
178 //! @return XYZ-components modifiable vector
179 NCollection_Vec3<Element_t>& xyz()
181 return *((NCollection_Vec3<Element_t>* )&v[0]);
184 //! @return YZW-components modifiable vector
185 NCollection_Vec3<Element_t>& yzw()
187 return *((NCollection_Vec3<Element_t>* )&v[1]);
190 //! Check this vector with another vector for equality (without tolerance!).
191 bool IsEqual (const NCollection_Vec4& theOther) const
193 return v[0] == theOther.v[0]
194 && v[1] == theOther.v[1]
195 && v[2] == theOther.v[2]
196 && v[3] == theOther.v[3];
199 //! Check this vector with another vector for equality (without tolerance!).
200 bool operator== (const NCollection_Vec4& theOther) { return IsEqual (theOther); }
201 bool operator== (const NCollection_Vec4& theOther) const { return IsEqual (theOther); }
203 //! Check this vector with another vector for non-equality (without tolerance!).
204 bool operator!= (const NCollection_Vec4& theOther) { return !IsEqual (theOther); }
205 bool operator!= (const NCollection_Vec4& theOther) const { return !IsEqual (theOther); }
207 //! Raw access to the data (for OpenGL exchange).
208 const Element_t* GetData() const { return v; }
209 Element_t* ChangeData() { return v; }
210 operator const Element_t*() const { return v; }
211 operator Element_t*() { return v; }
213 //! Compute per-component summary.
214 NCollection_Vec4& operator+= (const NCollection_Vec4& theAdd)
223 //! Compute per-component summary.
224 friend NCollection_Vec4 operator+ (const NCollection_Vec4& theLeft,
225 const NCollection_Vec4& theRight)
227 NCollection_Vec4 aSumm = NCollection_Vec4 (theLeft);
228 return aSumm += theRight;
232 NCollection_Vec4 operator-() const
234 return NCollection_Vec4 (-x(), -y(), -z(), -w());
237 //! Compute per-component subtraction.
238 NCollection_Vec4& operator-= (const NCollection_Vec4& theDec)
247 //! Compute per-component subtraction.
248 friend NCollection_Vec4 operator- (const NCollection_Vec4& theLeft,
249 const NCollection_Vec4& theRight)
251 NCollection_Vec4 aSumm = NCollection_Vec4 (theLeft);
252 return aSumm -= theRight;
255 //! Compute per-component multiplication.
256 NCollection_Vec4& operator*= (const NCollection_Vec4& theRight)
258 v[0] *= theRight.v[0];
259 v[1] *= theRight.v[1];
260 v[2] *= theRight.v[2];
261 v[3] *= theRight.v[3];
265 //! Compute per-component multiplication.
266 friend NCollection_Vec4 operator* (const NCollection_Vec4& theLeft,
267 const NCollection_Vec4& theRight)
269 NCollection_Vec4 aResult = NCollection_Vec4 (theLeft);
270 return aResult *= theRight;
273 //! Compute per-component multiplication.
274 void Multiply (const Element_t theFactor)
282 //! Compute per-component multiplication.
283 NCollection_Vec4& operator*=(const Element_t theFactor)
285 Multiply (theFactor);
289 //! Compute per-component multiplication.
290 NCollection_Vec4 operator* (const Element_t theFactor) const
292 return Multiplied (theFactor);
295 //! Compute per-component multiplication.
296 NCollection_Vec4 Multiplied (const Element_t theFactor) const
298 NCollection_Vec4 aCopyVec4 (*this);
299 aCopyVec4 *= theFactor;
303 //! Compute component-wise minimum of two vectors.
304 NCollection_Vec4 cwiseMin (const NCollection_Vec4& theVec) const
306 return NCollection_Vec4 (v[0] < theVec.v[0] ? v[0] : theVec.v[0],
307 v[1] < theVec.v[1] ? v[1] : theVec.v[1],
308 v[2] < theVec.v[2] ? v[2] : theVec.v[2],
309 v[3] < theVec.v[3] ? v[3] : theVec.v[3]);
312 //! Compute component-wise maximum of two vectors.
313 NCollection_Vec4 cwiseMax (const NCollection_Vec4& theVec) const
315 return NCollection_Vec4 (v[0] > theVec.v[0] ? v[0] : theVec.v[0],
316 v[1] > theVec.v[1] ? v[1] : theVec.v[1],
317 v[2] > theVec.v[2] ? v[2] : theVec.v[2],
318 v[3] > theVec.v[3] ? v[3] : theVec.v[3]);
321 //! Compute component-wise modulus of the vector.
322 NCollection_Vec4 cwiseAbs() const
324 return NCollection_Vec4 (std::abs (v[0]),
330 //! Compute maximum component of the vector.
331 Element_t maxComp() const
333 const Element_t aMax1 = v[0] > v[1] ? v[0] : v[1];
334 const Element_t aMax2 = v[2] > v[3] ? v[2] : v[3];
336 return aMax1 > aMax2 ? aMax1 : aMax2;
339 //! Compute minimum component of the vector.
340 Element_t minComp() const
342 const Element_t aMin1 = v[0] < v[1] ? v[0] : v[1];
343 const Element_t aMin2 = v[2] < v[3] ? v[2] : v[3];
345 return aMin1 < aMin2 ? aMin1 : aMin2;
348 //! Computes the dot product.
349 Element_t Dot (const NCollection_Vec4& theOther) const
351 return x() * theOther.x() +
357 //! Compute per-component division by scale factor.
358 NCollection_Vec4& operator/= (const Element_t theInvFactor)
360 v[0] /= theInvFactor;
361 v[1] /= theInvFactor;
362 v[2] /= theInvFactor;
363 v[3] /= theInvFactor;
367 //! Compute per-component division by scale factor.
368 NCollection_Vec4 operator/ (const Element_t theInvFactor)
370 NCollection_Vec4 aResult(*this);
371 return aResult /= theInvFactor;
376 Element_t v[4]; //!< define the vector as array to avoid structure alignment issues
380 //! Optimized concretization for float type.
381 template<> inline NCollection_Vec4<float>& NCollection_Vec4<float>::operator/= (const float theInvFactor)
383 Multiply (1.0f / theInvFactor);
387 //! Optimized concretization for double type.
388 template<> inline NCollection_Vec4<double>& NCollection_Vec4<double>::operator/= (const double theInvFactor)
390 Multiply (1.0 / theInvFactor);
394 #endif // _NCollection_Vec4_H__