From 09fec8a0e1df59f191413c69d8ac431e7373814e Mon Sep 17 00:00:00 2001 From: Sam Anthony Date: Tue, 12 Nov 2024 20:15:24 -0500 Subject: copy positions from cpu to gpu --- balls.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/balls.c b/balls.c index ba6a5f4..587b989 100644 --- a/balls.c +++ b/balls.c @@ -452,6 +452,8 @@ setKernelArgs(void) { void animate(int v) { + cl_event readEvent; + int err; clock_t tstart, elapsed; unsigned int nextFrame; @@ -461,8 +463,20 @@ animate(int v) { collideBalls(); collideWalls(); + /* Copy new positions from CPU to host asynchronously. */ + err = clEnqueueReadBuffer(cpuQueue, positionsCpuBuf, CL_FALSE, 0, nBalls*2*sizeof(float), positionsHostBuf, 0, NULL, &readEvent); + if (err < 0) + sysfatal("Failed to copy positions from CPU to host.\n"); + display(); + /* Copy new positions from host to GPU. */ + err = clEnqueueWriteBuffer(gpuQueue, positionsGpuBuf, CL_TRUE, 0, nBalls*2*sizeof(float), positionsHostBuf, 1, &readEvent, NULL); + if (err < 0) + sysfatal("Failed to copy positions from host to GPU.\n"); + + clReleaseEvent(readEvent); + elapsed = (clock() - tstart) / (CLOCKS_PER_SEC / MS_PER_S); nextFrame = (elapsed > FRAME_TIME_MS) ? 0 : FRAME_TIME_MS-elapsed; glutTimerFunc(nextFrame, animate, 0); -- cgit v1.2.3