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Added test for raycast.

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2012-02-23 17:08:00 +01:00
parent 8d3a66a08c
commit d2a94ac6f4
3 changed files with 124 additions and 1 deletions
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tests/TestRaycast.cpp Normal file
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/*******************************************************************************
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 <QtTest>
using namespace PolyVox;
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<Density8> 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++)
{
Density8 voxelValue;
if((x == 0) || (x == uVolumeSideLength-1) || (y == 0) || (y == uVolumeSideLength-1))
{
voxelValue.setDensity(255);
}
else
{
voxelValue.setDensity(0);
}
volData.setVoxelAt(x, y, z, voxelValue);
}
}
}
//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, Density8> raycast(&volData, start, randomUnitVectors[ct % 1024] * 1000.0f, result);
raycast.execute();
if(result.foundIntersection)
{
hits++;
}
}
//Check the number of hits.
QCOMPARE(hits, 687494);
}
QTEST_MAIN(TestRaycast)