From 56a794340509f31c8572edaeb058a585e24610b9 Mon Sep 17 00:00:00 2001
From: bloeys <bloeys@outlook.com>
Date: Fri, 28 Jan 2022 06:36:19 +0400
Subject: [PATCH] Implement SetScratchBuffer

---
 main.go                |   3 +++
 pgo/libs/libphysx-c.a  | Bin 16648 -> 16898 bytes
 pgo/pgo.go             |   6 ++++--
 pgo/physx-c/CPxScene.h |  10 ++++++++++
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/main.go b/main.go
index f70412c..3f0602f 100755
--- a/main.go
+++ b/main.go
@@ -73,6 +73,9 @@ func main() {
 	println("Box 2 mass:", dynBox2.GetMass())
 	println("Sphere mass:", dynSphere.GetMass())
 	println("Capsule mass:", dynCapsule.GetMass())
+
+	s.SetScratchBuffer(4)
+
 	for {
 		s.Simulate(1 / 60.0)
 		s.FetchResults(true)
diff --git a/pgo/libs/libphysx-c.a b/pgo/libs/libphysx-c.a
index 62ece36da3a6812227e677168c58d33c58ada8df..1e57d353102b9869f569ae0a60072742788a487f 100755
GIT binary patch
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diff --git a/pgo/pgo.go b/pgo/pgo.go
index 02e3a1d..e6c60b3 100755
--- a/pgo/pgo.go
+++ b/pgo/pgo.go
@@ -95,12 +95,10 @@ func (s *Scene) AddActor(a *Actor) {
 	C.CPxScene_addActor(s.cS, a.cA)
 }
 
-// void CPxScene_simulate(CSTRUCT CPxScene*, CPxReal elapsedTime);
 func (s *Scene) Simulate(elapsedTime float32) {
 	C.CPxScene_simulate(s.cS, C.float(elapsedTime))
 }
 
-// bool CPxScene_fetchResults(struct CPxScene*, bool block, CPxU32* errorState);
 func (s *Scene) FetchResults(block bool) (bool, uint32) {
 
 	var errState uint32
@@ -108,6 +106,10 @@ func (s *Scene) FetchResults(block bool) (bool, uint32) {
 	return bool(b), errState
 }
 
+func (s *Scene) SetScratchBuffer(multiplesOf16k uint32) {
+	C.CPxScene_setScratchBuffer(s.cS, C.uint(multiplesOf16k))
+}
+
 type Physics struct {
 	cPhysics *C.struct_CPxPhysics
 }
diff --git a/pgo/physx-c/CPxScene.h b/pgo/physx-c/CPxScene.h
index 6c39400..99acf2e 100755
--- a/pgo/physx-c/CPxScene.h
+++ b/pgo/physx-c/CPxScene.h
@@ -11,6 +11,8 @@ extern "C" {
 	struct CPxScene
 	{
 		void* obj;
+		void* scratchBuffer;
+		CPxU32 scratchBufferSize;
 	};
 
 	CPxAPI CSTRUCT CPxPvdSceneClient* CPxScene_getScenePvdClient(CSTRUCT CPxScene*);
@@ -18,6 +20,14 @@ extern "C" {
 	CPxAPI void CPxScene_simulate(CSTRUCT CPxScene*, CPxReal elapsedTime);
 	CPxAPI bool CPxScene_fetchResults(CSTRUCT CPxScene*, bool block, CPxU32* errorState);
 
+	/// <summary>
+	/// Creates a scratch buffer thats a multiple of 16K to be used by the scene when running CPxScene_simulate.
+	/// The buffer MUST be 16-byte aligned. If a buffer already exists then it is freed and a new one is allocated.
+	/// If multiples passed are zero then any existing buffers are cleared
+	/// </summary>
+	/// <returns></returns>
+	CPxAPI void CPxScene_setScratchBuffer(CSTRUCT CPxScene*, uint32_t multiplesOf16k);
+
 	CPxAPI void CPxScene_release(CSTRUCT CPxScene*);
 
 #ifdef __cplusplus