Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 60 insertions, 0 deletions

diff --git a/APEX_1.4/common/include/RandStateHelpers.h b/APEX_1.4/common/include/RandStateHelpers.h
new file mode 100644
index 00000000..afd79801
--- /dev/null
+++ b/APEX_1.4/common/include/RandStateHelpers.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2008-2015, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * NVIDIA CORPORATION and its licensors retain all intellectual property
+ * and proprietary rights in and to this software, related documentation
+ * and any modifications thereto.  Any use, reproduction, disclosure or
+ * distribution of this software and related documentation without an express
+ * license agreement from NVIDIA CORPORATION is strictly prohibited.
+ */
+
+
+#ifndef RAND_STATE_HELPERS_H
+#define RAND_STATE_HELPERS_H
+
+#include "PxTask.h"
+#include "ApexMirroredArray.h"
+
+namespace nvidia
+{
+namespace apex
+{
+
+// For CUDA PRNG: host part
+PX_INLINE void InitDevicePRNGs(
+    SceneIntl& scene,
+    unsigned int blockSize,
+    LCG_PRNG& threadLeap,
+    LCG_PRNG& gridLeap,
+    ApexMirroredArray<LCG_PRNG>& blockPRNGs)
+{
+	threadLeap = LCG_PRNG::getDefault().leapFrog(16);
+
+	LCG_PRNG randBlock = LCG_PRNG::getIdentity();
+	LCG_PRNG randBlockLeap = threadLeap.leapFrog(blockSize);
+
+	const uint32_t numBlocks = 32; //Max Multiprocessor count
+	blockPRNGs.setSize(numBlocks, ApexMirroredPlace::CPU_GPU);
+	for (uint32_t i = 0; i < numBlocks; ++i)
+	{
+		blockPRNGs[i] = randBlock;
+		randBlock *= randBlockLeap;
+	}
+	gridLeap = randBlock;
+
+	{
+		PxTaskManager* tm = scene.getTaskManager();
+		PxCudaContextManager* ctx = tm->getGpuDispatcher()->getCudaContextManager();
+
+		PxScopedCudaLock s(*ctx);
+
+		PxGpuCopyDesc desc;
+		blockPRNGs.copyHostToDeviceDesc(desc, 0, 0);
+		tm->getGpuDispatcher()->launchCopyKernel(&desc, 1, 0);
+	}
+}
+
+}
+} // nvidia::apex::
+
+#endif