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10/28/2024 06:50:42 AM
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Iex.h
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IexBaseExc.h
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IexErrnoExc.h
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IexExport.h
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IexForward.h
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IexMacros.h
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IexMathExc.h
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IexMathFloatExc.h
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IexMathFpu.h
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IexMathIeeeExc.h
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IexNamespace.h
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IexThrowErrnoExc.h
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IlmBaseConfig.h
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IlmThread.h
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IlmThreadExport.h
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IlmThreadForward.h
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IlmThreadMutex.h
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IlmThreadNamespace.h
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IlmThreadPool.h
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IlmThreadSemaphore.h
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ImathBox.h
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ImathBoxAlgo.h
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ImathColor.h
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ImathColorAlgo.h
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ImathEuler.h
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ImathExc.h
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ImathExport.h
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ImathForward.h
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ImathFrame.h
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ImathFrustum.h
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ImathFrustumTest.h
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ImathFun.h
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ImathGL.h
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ImathGLU.h
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ImathHalfLimits.h
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ImathInt64.h
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ImathInterval.h
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ImathLimits.h
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ImathLine.h
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ImathLineAlgo.h
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ImathMath.h
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ImathMatrix.h
82.42 KB
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ImathMatrixAlgo.h
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ImathNamespace.h
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ImathPlane.h
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ImathPlatform.h
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ImathQuat.h
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ImathRandom.h
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ImathRoots.h
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ImathShear.h
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ImathSphere.h
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ImathVec.h
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ImathVecAlgo.h
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ImfAcesFile.h
10.27 KB
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ImfArray.h
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ImfAttribute.h
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ImfB44Compressor.h
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ImfBoxAttribute.h
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ImfCRgbaFile.h
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ImfChannelList.h
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ImfChannelListAttribute.h
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ImfChromaticities.h
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ImfChromaticitiesAttribute.h
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ImfCompositeDeepScanLine.h
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ImfCompression.h
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ImfCompressionAttribute.h
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ImfConvert.h
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ImfDeepCompositing.h
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ImfDeepFrameBuffer.h
8.79 KB
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ImfDeepImageState.h
3.67 KB
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ImfDeepImageStateAttribute.h
2.64 KB
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ImfDeepScanLineInputFile.h
11.01 KB
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ImfDeepScanLineInputPart.h
6.9 KB
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ImfDeepScanLineOutputFile.h
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ImfDeepScanLineOutputPart.h
6.41 KB
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ImfDeepTiledInputFile.h
16.08 KB
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ImfDeepTiledInputPart.h
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ImfDeepTiledOutputFile.h
18.1 KB
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ImfDeepTiledOutputPart.h
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ImfDoubleAttribute.h
2.29 KB
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ImfEnvmap.h
11.29 KB
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ImfEnvmapAttribute.h
2.67 KB
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ImfExport.h
2.11 KB
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ImfFloatAttribute.h
2.26 KB
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ImfForward.h
3.48 KB
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ImfFrameBuffer.h
11.18 KB
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ImfFramesPerSecond.h
3.79 KB
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ImfGenericInputFile.h
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ImfGenericOutputFile.h
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ImfHeader.h
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ImfHuf.h
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ImfIO.h
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ImfInputFile.h
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ImfInputPart.h
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ImfInt64.h
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ImfIntAttribute.h
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ImfKeyCode.h
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ImfKeyCodeAttribute.h
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ImfLineOrder.h
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ImfLineOrderAttribute.h
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ImfLut.h
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ImfMatrixAttribute.h
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ImfMisc.h
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ImfMultiPartInputFile.h
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ImfMultiPartOutputFile.h
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ImfMultiView.h
6.29 KB
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ImfName.h
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ImfNamespace.h
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ImfOpaqueAttribute.h
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ImfOutputFile.h
9.66 KB
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ImfOutputPart.h
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ImfPartHelper.h
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ImfPartType.h
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ImfPixelType.h
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ImfPreviewImage.h
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ImfPreviewImageAttribute.h
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ImfRational.h
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ImfRationalAttribute.h
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ImfRgba.h
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ImfRgbaFile.h
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ImfRgbaYca.h
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ImfStandardAttributes.h
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ImfStringAttribute.h
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ImfStringVectorAttribute.h
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ImfTestFile.h
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ImfThreading.h
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ImfTileDescription.h
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ImfTileDescriptionAttribute.h
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ImfTiledInputFile.h
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ImfTiledInputPart.h
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ImfTiledOutputFile.h
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ImfTiledOutputPart.h
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ImfTiledRgbaFile.h
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ImfTimeCode.h
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ImfTimeCodeAttribute.h
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ImfVecAttribute.h
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ImfVersion.h
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ImfWav.h
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ImfXdr.h
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OpenEXRConfig.h
1.8 KB
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half.h
17.22 KB
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halfExport.h
757 bytes
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halfFunction.h
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halfLimits.h
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Editing: ImathSphere.h
Close
/////////////////////////////////////////////////////////////////////////// // // Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas // Digital Ltd. LLC // // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Industrial Light & Magic nor the names of // its contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // /////////////////////////////////////////////////////////////////////////// #ifndef INCLUDED_IMATHSPHERE_H #define INCLUDED_IMATHSPHERE_H //------------------------------------- // // A 3D sphere class template // //------------------------------------- #include "ImathVec.h" #include "ImathBox.h" #include "ImathLine.h" #include "ImathNamespace.h" IMATH_INTERNAL_NAMESPACE_HEADER_ENTER template <class T> class Sphere3 { public: Vec3<T> center; T radius; //--------------- // Constructors //--------------- Sphere3() : center(0,0,0), radius(0) {} Sphere3(const Vec3<T> &c, T r) : center(c), radius(r) {} //------------------------------------------------------------------- // Utilities: // // s.circumscribe(b) sets center and radius of sphere s // so that the s tightly encloses box b. // // s.intersectT (l, t) If sphere s and line l intersect, then // intersectT() computes the smallest t, // t >= 0, so that l(t) is a point on the // sphere. intersectT() then returns true. // // If s and l do not intersect, intersectT() // returns false. // // s.intersect (l, i) If sphere s and line l intersect, then // intersect() calls s.intersectT(l,t) and // computes i = l(t). // // If s and l do not intersect, intersect() // returns false. // //------------------------------------------------------------------- void circumscribe(const Box<Vec3<T> > &box); bool intersect(const Line3<T> &l, Vec3<T> &intersection) const; bool intersectT(const Line3<T> &l, T &t) const; }; //-------------------- // Convenient typedefs //-------------------- typedef Sphere3<float> Sphere3f; typedef Sphere3<double> Sphere3d; //--------------- // Implementation //--------------- template <class T> void Sphere3<T>::circumscribe(const Box<Vec3<T> > &box) { center = T(0.5) * (box.min + box.max); radius = (box.max - center).length(); } template <class T> bool Sphere3<T>::intersectT(const Line3<T> &line, T &t) const { bool doesIntersect = true; Vec3<T> v = line.pos - center; T B = T(2.0) * (line.dir ^ v); T C = (v ^ v) - (radius * radius); // compute discriminant // if negative, there is no intersection T discr = B*B - T(4.0)*C; if (discr < 0.0) { // line and Sphere3 do not intersect doesIntersect = false; } else { // t0: (-B - sqrt(B^2 - 4AC)) / 2A (A = 1) T sqroot = Math<T>::sqrt(discr); t = (-B - sqroot) * T(0.5); if (t < 0.0) { // no intersection, try t1: (-B + sqrt(B^2 - 4AC)) / 2A (A = 1) t = (-B + sqroot) * T(0.5); } if (t < 0.0) doesIntersect = false; } return doesIntersect; } template <class T> bool Sphere3<T>::intersect(const Line3<T> &line, Vec3<T> &intersection) const { T t; if (intersectT (line, t)) { intersection = line(t); return true; } else { return false; } } IMATH_INTERNAL_NAMESPACE_HEADER_EXIT #endif // INCLUDED_IMATHSPHERE_H