Making bvh on mesh generate in bg

KaijuEngine · Mar 21, 2024 · 1ec6774 · 1ec6774
1 parent ca69e00
commit 1ec6774
Showing 1 changed file with 33 additions and 28 deletions.
diff --git a/src/editor/content/content_opener/obj_opener.go b/src/editor/content/content_opener/obj_opener.go
@@ -47,6 +47,7 @@ import (
 	"kaiju/engine"
 	"kaiju/matrix"
 	"kaiju/rendering"
+	"kaiju/rendering/loaders/load_result"
 	"sync"
 )
 
@@ -56,6 +57,37 @@ func (o ObjOpener) Handles(adi asset_info.AssetDatabaseInfo) bool {
 	return adi.Type == editor_config.AssetTypeObj
 }
 
+func buildBVH(m load_result.Mesh, e *engine.Entity) {
+	tris := make([]collision.DetailedTriangle, len(m.Indexes)/3)
+	group := sync.WaitGroup{}
+	construct := func(from, to int) {
+		for i := from; i < to; i += 3 {
+			for i := 0; i < len(m.Indexes); i += 3 {
+				points := [3]matrix.Vec3{
+					m.Verts[m.Indexes[i]].Position,
+					m.Verts[m.Indexes[i+1]].Position,
+					m.Verts[m.Indexes[i+2]].Position,
+				}
+				tris[i/3] = collision.DetailedTriangleFromPoints(points)
+			}
+		}
+		group.Done()
+	}
+	group.Add(1)
+	if len(tris) > 100 {
+		group.Add(9)
+		for i := 0; i < 10; i++ {
+			go construct(i*len(tris)/10, (i+1)*len(tris)/10)
+		}
+	} else {
+		construct(0, len(tris))
+		group.Done()
+	}
+	group.Wait()
+	bvh := collision.BVHBottomUp(tris)
+	e.EditorBindings.Set("bvh", bvh)
+}
+
 func load(host *engine.Host, adi asset_info.AssetDatabaseInfo, e *engine.Entity) error {
 	texId := assets.TextureSquare
 	if t, ok := adi.Metadata["texture"]; ok {
@@ -89,34 +121,7 @@ func load(host *engine.Host, adi asset_info.AssetDatabaseInfo, e *engine.Entity)
 			return err
 		}
 		mesh = rendering.NewMesh(adi.ID, m.Verts, m.Indexes)
-		tris := make([]collision.DetailedTriangle, len(m.Indexes)/3)
-		group := sync.WaitGroup{}
-		construct := func(from, to int) {
-			for i := from; i < to; i += 3 {
-				for i := 0; i < len(m.Indexes); i += 3 {
-					points := [3]matrix.Vec3{
-						m.Verts[m.Indexes[i]].Position,
-						m.Verts[m.Indexes[i+1]].Position,
-						m.Verts[m.Indexes[i+2]].Position,
-					}
-					tris[i/3] = collision.DetailedTriangleFromPoints(points)
-				}
-			}
-			group.Done()
-		}
-		group.Add(1)
-		if len(tris) > 100 {
-			group.Add(9)
-			for i := 0; i < 10; i++ {
-				go construct(i*len(tris)/10, (i+1)*len(tris)/10)
-			}
-		} else {
-			construct(0, len(tris))
-			group.Done()
-		}
-		group.Wait()
-		bvh := collision.BVHBottomUp(tris)
-		e.EditorBindings.Set("bvh", bvh)
+		go buildBVH(m, e)
 	}
 	host.MeshCache().AddMesh(mesh)
 	drawing := rendering.Drawing{