Function RenderScene

demo/main.cpp:1191–1417

}

void RenderScene()
{
	const int numParticles = NvFlexGetActiveCount(g_flex);
	const int numDiffuse = NvFlexGetDiffuseParticles(g_flex, NULL, NULL, NULL);

	//---------------------------------------------------
	// use VBO buffer wrappers to allow Flex to write directly to the OpenGL buffers
	// Flex will take care of any CUDA interop mapping/unmapping during the get() operations

	if (numParticles)
	{

		if (g_interop)
		{
			// copy data directly from solver to the renderer buffers
			UpdateFluidRenderBuffers(g_fluidRenderBuffers, g_flex, g_drawEllipsoids, g_drawDensity);
		}
		else
		{
			// copy particle data to GPU render device

			if (g_drawEllipsoids)
			{
				// if fluid surface rendering then update with smooth positions and anisotropy
				UpdateFluidRenderBuffers(g_fluidRenderBuffers,
					&g_buffers->smoothPositions[0],
					(g_drawDensity) ? &g_buffers->densities[0] : (float*)&g_buffers->phases[0],
					&g_buffers->anisotropy1[0],
					&g_buffers->anisotropy2[0],
					&g_buffers->anisotropy3[0],
					g_buffers->positions.size(),
					&g_buffers->activeIndices[0],
					numParticles);
			}
			else
			{
				// otherwise just send regular positions and no anisotropy
				UpdateFluidRenderBuffers(g_fluidRenderBuffers,
					&g_buffers->positions[0],
					(float*)&g_buffers->phases[0],
					NULL, NULL, NULL,
					g_buffers->positions.size(),
					&g_buffers->activeIndices[0],
					numParticles);
			}
		}
	}
	
	if (numDiffuse)
	{
		if (g_interop)
		{
			// copy data directly from solver to the renderer buffers
			UpdateDiffuseRenderBuffers(g_diffuseRenderBuffers, g_flex);
		}
		else
		{
			// copy diffuse particle data from host to GPU render device