bb87e9e628
By changing the 'pass by value' to be a 'pass by const reference' (and adding some const qualifiers) the calculator can take any of the three types. Performance could be improved further using C++11 perfect forwarding to pass the function on without changing a thing. I added a comment to remind us of this. Also added a test for passing a function and a (commented out) test for passing a lambda.
95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
/*******************************************************************************
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Copyright (c) 2010 Matt Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#include "TestAmbientOcclusionGenerator.h"
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#include "PolyVoxCore/AmbientOcclusionCalculator.h"
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#include "PolyVoxCore/SimpleVolume.h"
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#include <QtTest>
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using namespace PolyVox;
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class IsVoxelTransparent
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{
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public:
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bool operator()(uint8_t voxel) const
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{
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return voxel == 0;
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}
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};
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bool isVoxelTransparentFunction(uint8_t voxel)
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{
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return voxel == 0;
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}
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void TestAmbientOcclusionGenerator::testExecute()
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{
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const int32_t g_uVolumeSideLength = 64;
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//Create empty volume
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SimpleVolume<uint8_t> volData(Region(Vector3DInt32(0,0,0), Vector3DInt32(g_uVolumeSideLength-1, g_uVolumeSideLength-1, g_uVolumeSideLength-1)));
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//Create two solid walls at opposite sides of the volume
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for (int32_t z = 0; z < g_uVolumeSideLength; z++)
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{
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if((z < 20) || (z > g_uVolumeSideLength - 20))
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{
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for (int32_t y = 0; y < g_uVolumeSideLength; y++)
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{
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for (int32_t x = 0; x < g_uVolumeSideLength; x++)
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{
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volData.setVoxelAt(x, y, z, 1);
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}
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}
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}
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}
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//Create an array to store the result. Array can be smaller than the volume by an integer amount.
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const int32_t g_uArraySideLength = g_uVolumeSideLength / 2;
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Array<3, uint8_t> ambientOcclusionResult(ArraySizes(g_uArraySideLength)(g_uArraySideLength)(g_uArraySideLength));
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// Calculate the ambient occlusion values
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IsVoxelTransparent isVoxelTransparent;
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QBENCHMARK {
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calculateAmbientOcclusion(&volData, &ambientOcclusionResult, volData.getEnclosingRegion(), 32.0f, 255, isVoxelTransparent);
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}
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//Check the results by sampling along a line though the centre of the volume. Because
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//of the two walls we added, samples in the middle are darker than those at the edge.
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QCOMPARE(static_cast<int>(ambientOcclusionResult[16][ 0][16]), 178);
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QCOMPARE(static_cast<int>(ambientOcclusionResult[16][ 8][16]), 109);
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QCOMPARE(static_cast<int>(ambientOcclusionResult[16][16][16]), 103);
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QCOMPARE(static_cast<int>(ambientOcclusionResult[16][24][16]), 123);
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QCOMPARE(static_cast<int>(ambientOcclusionResult[16][31][16]), 173);
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//Just run a quick test to make sure that it compiles when taking a function pointer
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calculateAmbientOcclusion(&volData, &ambientOcclusionResult, volData.getEnclosingRegion(), 32.0f, 8, &isVoxelTransparentFunction);
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//Also test it using a lambda
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//calculateAmbientOcclusion(&volData, &ambientOcclusionResult, volData.getEnclosingRegion(), 32.0f, 8, [](uint8_t voxel){return voxel == 0;});
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}
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QTEST_MAIN(TestAmbientOcclusionGenerator)
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