From 73a4a9569041c984416466aacb42be2d8868dad3 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Tue, 29 Oct 2024 20:16:06 -0400
Subject: ball-ball collisions (untested)

---
 balls.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'balls.c')

diff --git a/balls.c b/balls.c
index bf81517..9e2522a 100644
--- a/balls.c
+++ b/balls.c
@@ -129,8 +129,13 @@ initCL(void) {
 	#endif
 
 	/* Get GPU device. */
-	if (clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL) < 0)
-		sysfatal("No GPUs available.\n");
+	err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL);
+	if (err < 0) {
+		fprintf(stderr, "No GPU available, falling back to CPU.\n");
+		err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 1, &device, NULL);
+		if (err < 0)
+			sysfatal("No CL devices available.\n");
+	}
 
 	/* Create context. */
 	context = clCreateContext(properties, 1, &device, NULL, NULL, &err);
-- 
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