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| ** |
| ** Copyright (C) 2016 Paul Lemire |
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| ** |
| ** This file is part of the Qt3D module of the Qt Toolkit. |
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| |
| #include "frustumcullingjob_p.h" |
| #include <Qt3DRender/private/job_common_p.h> |
| #include <Qt3DRender/private/managers_p.h> |
| #include <Qt3DRender/private/entity_p.h> |
| #include <Qt3DRender/private/sphere_p.h> |
| #include <Qt3DRender/private/managers_p.h> |
| #include <Qt3DRender/private/nodemanagers_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DRender { |
| |
| namespace Render { |
| |
| FrustumCullingJob::FrustumCullingJob() |
| : Qt3DCore::QAspectJob() |
| , m_root(nullptr) |
| , m_manager(nullptr) |
| , m_active(false) |
| { |
| SET_JOB_RUN_STAT_TYPE(this, JobTypes::FrustumCulling, 0) |
| } |
| |
| void FrustumCullingJob::run() |
| { |
| // Early return if not activated |
| if (!m_active) |
| return; |
| |
| m_visibleEntities.clear(); |
| |
| const Plane planes[6] = { |
| Plane(m_viewProjection.row(3) + m_viewProjection.row(0)), // Left |
| Plane(m_viewProjection.row(3) - m_viewProjection.row(0)), // Right |
| Plane(m_viewProjection.row(3) + m_viewProjection.row(1)), // Top |
| Plane(m_viewProjection.row(3) - m_viewProjection.row(1)), // Bottom |
| Plane(m_viewProjection.row(3) + m_viewProjection.row(2)), // Front |
| Plane(m_viewProjection.row(3) - m_viewProjection.row(2)), // Back |
| }; |
| |
| cullScene(m_root, planes); |
| |
| // sort needed for set_intersection in RenderViewBuilder |
| std::sort(m_visibleEntities.begin(), m_visibleEntities.end()); |
| } |
| |
| void FrustumCullingJob::cullScene(Entity *e, const Plane *planes) |
| { |
| e->traverse([planes, this](Entity *e) { |
| const Sphere *s = e->worldBoundingVolumeWithChildren(); |
| |
| // Unrolled loop |
| if (Vector3D::dotProduct(s->center(), planes[0].normal) + planes[0].d < -s->radius()) |
| return; |
| if (Vector3D::dotProduct(s->center(), planes[1].normal) + planes[1].d < -s->radius()) |
| return; |
| if (Vector3D::dotProduct(s->center(), planes[2].normal) + planes[2].d < -s->radius()) |
| return; |
| if (Vector3D::dotProduct(s->center(), planes[3].normal) + planes[3].d < -s->radius()) |
| return; |
| if (Vector3D::dotProduct(s->center(), planes[4].normal) + planes[4].d < -s->radius()) |
| return; |
| if (Vector3D::dotProduct(s->center(), planes[5].normal) + planes[5].d < -s->radius()) |
| return; |
| |
| m_visibleEntities.push_back(e); |
| }); |
| } |
| |
| } // Render |
| |
| } // Qt3DRender |
| |
| QT_END_NAMESPACE |