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Optimize terrain debug shape drawing by caching lines into a vertex buffer

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#2841
This commit is contained in:
Wojtek Figat
2024-12-09 18:26:53 +01:00
parent 0cf31395b5
commit 3e344e789a
7 changed files with 141 additions and 34 deletions
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58
Source/Engine/Terrain/TerrainPatch.cpp
View File

@@ -33,6 +33,11 @@
#if USE_EDITOR
#include "Engine/Debug/DebugDraw.h"
#endif
#if TERRAIN_USE_PHYSICS_DEBUG
#include "Engine/Graphics/GPUDevice.h"
#include "Engine/Graphics/DynamicBuffer.h"
#include "Engine/Engine/Units.h"
#endif
#include "Engine/Content/Content.h"
#include "Engine/Content/Assets/RawDataAsset.h"
@@ -94,7 +99,8 @@ void TerrainPatch::Init(Terrain* terrain, int16 x, int16 z)
}
#endif
#if TERRAIN_USE_PHYSICS_DEBUG
_debugLines.Resize(0);
SAFE_DELETE(_debugLines);
_debugLinesDirty = true;
#endif
#if USE_EDITOR
_collisionTriangles.Resize(0);
@@ -1822,7 +1828,7 @@ bool TerrainPatch::UpdateHeightData(TerrainDataUpdateInfo& info, const Int2& mod
// Invalidate cache
#if TERRAIN_USE_PHYSICS_DEBUG
_debugLines.Resize(0);
_debugLinesDirty = true;
#endif
#if USE_EDITOR
_collisionTriangles.Resize(0);
@@ -1940,7 +1946,7 @@ bool TerrainPatch::UpdateCollision()
{
// Invalidate cache
#if TERRAIN_USE_PHYSICS_DEBUG
_debugLines.Resize(0);
_debugLinesDirty = true;
#endif
#if USE_EDITOR
_collisionTriangles.Resize(0);
@@ -2082,7 +2088,7 @@ void TerrainPatch::UpdatePostManualDeserialization()
{
// Invalidate cache
#if TERRAIN_USE_PHYSICS_DEBUG
_debugLines.Resize(0);
_debugLinesDirty = true;
#endif
#if USE_EDITOR
_collisionTriangles.Resize(0);
@@ -2211,7 +2217,8 @@ void TerrainPatch::DestroyCollision()
_physicsShape = nullptr;
_physicsHeightField = nullptr;
#if TERRAIN_USE_PHYSICS_DEBUG
_debugLines.Resize(0);
_debugLinesDirty = true;
SAFE_DELETE(_debugLines);
#endif
#if USE_EDITOR
_collisionTriangles.Resize(0);
@@ -2224,15 +2231,26 @@ void TerrainPatch::DestroyCollision()
void TerrainPatch::CacheDebugLines()
{
PROFILE_CPU();
ASSERT(_debugLines.IsEmpty() && _physicsHeightField);
ASSERT(_physicsHeightField);
_debugLinesDirty = false;
if (!_debugLines)
_debugLines = GPUDevice::Instance->CreateBuffer(TEXT("Terrain.DebugLines"));
int32 rows, cols;
PhysicsBackend::GetHeightFieldSize(_physicsHeightField, rows, cols);
const int32 count = (rows - 1) * (cols - 1) * 6 + (cols + rows - 2) * 2;
typedef DebugDraw::Vertex Vertex;
if (_debugLines->GetElementsCount() != count)
{
if (_debugLines->Init(GPUBufferDescription::Vertex(sizeof(Vertex), count)))
return;
}
Array<Vertex> debugLines;
debugLines.Resize(count);
auto* data = debugLines.Get();
const Color32 color(Color::GreenYellow * 0.8f);
_debugLines.Resize((rows - 1) * (cols - 1) * 6 + (cols + rows - 2) * 2);
Vector3* data = _debugLines.Get();
#define GET_VERTEX(x, y) const Vector3 v##x##y((float)(row + (x)), PhysicsBackend::GetHeightFieldHeight(_physicsHeightField, row + (x), col + (y)) / TERRAIN_PATCH_COLLISION_QUANTIZATION, (float)(col + (y)))
#define GET_VERTEX(x, y) const Vertex v##x##y = { Float3((float)(row + (x)), PhysicsBackend::GetHeightFieldHeight(_physicsHeightField, row + (x), col + (y)) / TERRAIN_PATCH_COLLISION_QUANTIZATION, (float)(col + (y))), color }
for (int32 row = 0; row < rows - 1; row++)
{
@@ -2243,7 +2261,7 @@ void TerrainPatch::CacheDebugLines()
if (sample.MaterialIndex0 == (uint8)PhysicsBackend::HeightFieldMaterial::Hole)
{
for (int32 i = 0; i < 6; i++)
*data++ = Vector3::Zero;
*data++ = Vertex { Float3::Zero, Color32::Black };
continue;
}
@@ -2284,18 +2302,16 @@ void TerrainPatch::CacheDebugLines()
}
#undef GET_VERTEX
_debugLines->SetData(debugLines.Get(), _debugLines->GetSize());
}
void TerrainPatch::DrawPhysicsDebug(RenderView& view)
{
#if COMPILE_WITH_DEBUG_DRAW
const BoundingBox bounds(_bounds.Minimum - view.Origin, _bounds.Maximum - view.Origin);
if (!_physicsShape || !view.CullingFrustum.Intersects(bounds))
return;
const Transform terrainTransform = _terrain->_transform;
const Transform localTransform(Vector3(0, _yOffset, 0), Quaternion::Identity, Vector3(_collisionScaleXZ, _yHeight, _collisionScaleXZ));
const Matrix world = localTransform.GetWorld() * terrainTransform.GetWorld();
if (view.Mode == ViewMode::PhysicsColliders)
{
DEBUG_DRAW_TRIANGLES(GetCollisionTriangles(), Color::DarkOliveGreen, 0, true);
@@ -2304,13 +2320,17 @@ void TerrainPatch::DrawPhysicsDebug(RenderView& view)
{
BoundingSphere sphere;
BoundingSphere::FromBox(bounds, sphere);
if (Vector3::Distance(sphere.Center, view.Position) - sphere.Radius < 4000.0f)
if (Vector3::Distance(sphere.Center, view.Position) - sphere.Radius < METERS_TO_UNITS(500))
{
if (_debugLines.IsEmpty())
if (!_debugLines || _debugLinesDirty)
CacheDebugLines();
DEBUG_DRAW_LINES(_debugLines, world, Color::GreenYellow * 0.8f, 0, true);
const Transform terrainTransform = _terrain->_transform;
const Transform localTransform(Vector3(0, _yOffset, 0), Quaternion::Identity, Vector3(_collisionScaleXZ, _yHeight, _collisionScaleXZ));
const Matrix world = localTransform.GetWorld() * terrainTransform.GetWorld();
DebugDraw::DrawLines(_debugLines, world);
}
}
#endif
}
#endif

7
Source/Engine/Terrain/TerrainPatch.h
View File

@@ -40,12 +40,13 @@ private:
Array<Color32> _cachedSplatMap[TERRAIN_MAX_SPLATMAPS_COUNT];
bool _wasHeightModified;
bool _wasSplatmapModified[TERRAIN_MAX_SPLATMAPS_COUNT];
#if TERRAIN_USE_PHYSICS_DEBUG
bool _debugLinesDirty = true;
class GPUBuffer* _debugLines = nullptr;
#endif
TextureBase::InitData* _dataHeightmap = nullptr;
TextureBase::InitData* _dataSplatmap[TERRAIN_MAX_SPLATMAPS_COUNT] = {};
#endif
#if TERRAIN_USE_PHYSICS_DEBUG
Array<Vector3> _debugLines; // TODO: large-worlds
#endif
#if USE_EDITOR
Array<Vector3> _collisionTriangles; // TODO: large-worlds
#endif