/******************************************************************************* Copyright (c) 2010 Matt Williams This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. *******************************************************************************/ #include "TestRaycast.h" #include "PolyVoxCore/Density.h" #include "PolyVoxCore/Raycast.h" #include "PolyVoxCore/SimpleVolume.h" #include "PolyVoxImpl/RandomUnitVectors.h" #include using namespace PolyVox; bool foundIntersection; bool isPassableByRay(const SimpleVolume::Sampler& sampler) { if(sampler.getVoxel() > 0) { foundIntersection = true; } return sampler.getVoxel() <= 0; } // This is the callback functor which is called by the raycast() function for every voxel it touches. // It's primary purpose is to tell the raycast whether or not to continue (i.e. it tests whether the // ray has hit a solid voxel). Because the instance of this class is passed to the raycast() function by reference we can also use it to encapsulate some state. class MyFunctor { public: bool operator()(const SimpleVolume::Sampler& sampler) { if(sampler.getVoxel() > 0) { foundIntersection = true; } return sampler.getVoxel() <= 0; } }; void TestRaycast::testExecute() { const int32_t uVolumeSideLength = 32; //Create a hollow volume, with solid sides on x and y but with open ends in z. SimpleVolume volData(Region(Vector3DInt32(0,0,0), Vector3DInt32(uVolumeSideLength-1, uVolumeSideLength-1, uVolumeSideLength-1))); for (int32_t z = 0; z < uVolumeSideLength; z++) { for (int32_t y = 0; y < uVolumeSideLength; y++) { for (int32_t x = 0; x < uVolumeSideLength; x++) { if((x == 0) || (x == uVolumeSideLength-1) || (y == 0) || (y == uVolumeSideLength-1)) { volData.setVoxelAt(x, y, z, 100); } else { volData.setVoxelAt(x, y, z, -100); } } } } QTime timer; timer.start(); //Cast rays from the centre. Roughly 2/3 should escape. Vector3DFloat start (uVolumeSideLength / 2, uVolumeSideLength / 2, uVolumeSideLength / 2); int hits = 0; for(int ct = 0; ct < 1000000; ct++) { /*RaycastResult result; Raycast< SimpleVolume > raycast(&volData, start, randomUnitVectors[ct % 1024] * 1000.0f, result, isPassableByRay); raycast.execute(); if(result.foundIntersection) { hits++; }*/ foundIntersection = false; MyFunctor myFunctor; raycast(&volData, start, randomUnitVectors[ct % 1024] * 1000.0f, myFunctor); if(foundIntersection) { hits++; } } std::cout << "Finished in " << timer.elapsed() << "ms" << std::endl; //Check the number of hits. QCOMPARE(hits, 687494); } QTEST_MAIN(TestRaycast)