void Decals::PaintDecal()
{
Vector3 hitPos;
Drawable* hitDrawable;
if (Raycast(250.0f, hitPos, hitDrawable))
{
// Check if target scene node already has a DecalSet component. If not, create now
Node* targetNode = hitDrawable->GetNode();
DecalSet* decal = targetNode->GetComponent<DecalSet>();
if (!decal)
{
ResourceCache* cache = GetSubsystem<ResourceCache>();
decal = targetNode->CreateComponent<DecalSet>();
decal->SetMaterial(cache->GetResource<Material>("Materials/UrhoDecal.xml"));
}
// Add a square decal to the decal set using the geometry of the drawable that was hit, orient it to face the camera,
// use full texture UV's (0,0) to (1,1). Note that if we create several decals to a large object (such as the ground
// plane) over a large area using just one DecalSet component, the decals will all be culled as one unit. If that is
// undesirable, it may be necessary to create more than one DecalSet based on the distance
decal->AddDecal(hitDrawable, hitPos, cameraNode_->GetRotation(), 0.5f, 1.0f, 1.0f, Vector2::ZERO,
Vector2::ONE);
}
}
void Decals::PaintDecal()
{
UI* ui = GetSubsystem<UI>();
Graphics* graphics = GetSubsystem<Graphics>();
IntVector2 pos = ui->GetCursorPosition();
// Make sure no UI element in front of the cursor
if (ui->GetElementAt(pos, true))
return;
Camera* camera = cameraNode_->GetComponent<Camera>();
Ray cameraRay = camera->GetScreenRay((float)pos.x_ / graphics->GetWidth(), (float)pos.y_ / graphics->GetHeight());
// Raycast up to 250 world units distance, pick only geometry objects, not eg. zones or lights, only get the first
// (closest) hit
PODVector<RayQueryResult> results;
RayOctreeQuery query(results, cameraRay, RAY_TRIANGLE, 250.0f, DRAWABLE_GEOMETRY);
scene_->GetComponent<Octree>()->RaycastSingle(query);
if (results.Size())
{
RayQueryResult& result = results[0];
// Calculate hit position in world space
Vector3 rayHitPos = cameraRay.origin_ + cameraRay.direction_ * result.distance_;
// Check if target scene node already has a DecalSet component. If not, create now
Node* targetNode = result.drawable_->GetNode();
DecalSet* decal = targetNode->GetComponent<DecalSet>();
if (!decal)
{
ResourceCache* cache = GetSubsystem<ResourceCache>();
decal = targetNode->CreateComponent<DecalSet>();
decal->SetMaterial(cache->GetResource<Material>("Materials/UrhoDecal.xml"));
}
// Add a square decal to the decal set using the geometry of the drawable that was hit, orient it to face the camera,
// use full texture UV's (0,0) to (1,1). Note that if we create several decals to a large object (such as the ground
// plane) over a large area using just one DecalSet component, the decals will all be culled as one unit. If that is
// undesirable, it may be necessary to create more than one DecalSet based on the distance
decal->AddDecal(result.drawable_, rayHitPos, cameraNode_->GetWorldRotation(), 0.5f, 1.0f, 1.0f, Vector2::ZERO,
Vector2::ONE);
}
}
