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Fixed random seed when run in benchmark mode, use default random engine instead of fixed mersene twister

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Refs #269
This commit is contained in:
saschawillems 2018-01-18 21:31:19 +01:00
parent 5790f30c17
commit 9e073bdd3b
11 changed files with 55 additions and 60 deletions
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9
examples/ssao/ssao.cpp
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@ -1007,17 +1007,16 @@ public:
updateUniformBufferSSAOParams();
// SSAO
std::default_random_engine rndEngine(benchmark.active ? 0 : (unsigned)time(nullptr));
std::uniform_real_distribution<float> rndDist(0.0f, 1.0f);
std::random_device rndDev;
std::default_random_engine rndGen;
// Sample kernel
std::vector<glm::vec4> ssaoKernel(SSAO_KERNEL_SIZE);
for (uint32_t i = 0; i < SSAO_KERNEL_SIZE; ++i)
{
glm::vec3 sample(rndDist(rndGen) * 2.0 - 1.0, rndDist(rndGen) * 2.0 - 1.0, rndDist(rndGen));
glm::vec3 sample(rndDist(rndEngine) * 2.0 - 1.0, rndDist(rndEngine) * 2.0 - 1.0, rndDist(rndEngine));
sample = glm::normalize(sample);
sample *= rndDist(rndGen);
sample *= rndDist(rndEngine);
float scale = float(i) / float(SSAO_KERNEL_SIZE);
scale = lerp(0.1f, 1.0f, scale * scale);
ssaoKernel[i] = glm::vec4(sample * scale, 0.0f);
@ -1035,7 +1034,7 @@ public:
std::vector<glm::vec4> ssaoNoise(SSAO_NOISE_DIM * SSAO_NOISE_DIM);
for (uint32_t i = 0; i < static_cast<uint32_t>(ssaoNoise.size()); i++)
{
ssaoNoise[i] = glm::vec4(rndDist(rndGen) * 2.0f - 1.0f, rndDist(rndGen) * 2.0f - 1.0f, 0.0f, 0.0f);
ssaoNoise[i] = glm::vec4(rndDist(rndEngine) * 2.0f - 1.0f, rndDist(rndEngine) * 2.0f - 1.0f, 0.0f, 0.0f);
}
// Upload as texture
textures.ssaoNoise.fromBuffer(ssaoNoise.data(), ssaoNoise.size() * sizeof(glm::vec4), VK_FORMAT_R32G32B32A32_SFLOAT, SSAO_NOISE_DIM, SSAO_NOISE_DIM, vulkanDevice, queue, VK_FILTER_NEAREST);