GLUshape: Fix off-by-one error in an increment calculation in revolve

1 files changed, 1 insertions, 1 deletions

diff --git a/src/revolve.c b/src/revolve.c
index ff41029..90d48b3 100644
--- a/src/revolve.c
+++ b/src/revolve.c
@@ -30,7 +30,7 @@ revolve(const GLUvec4 *points, const GLUvec4 *normals, const float *u,
 	unsigned steps, float start_angle, float end_angle,
 	revolve_cb *cb, void *data)
 {
-	const float angle_step = (end_angle - start_angle) / (float) steps;
+	const float angle_step = (end_angle - start_angle) / (float) (steps - 1);
 	const GLUvec4 tangent = {{ 0.0, 0.0, 1.0, 0.0 }};
 	unsigned i;
 	unsigned j;