From b6caab906a0a4200f04c1510bf26e4e7aa50f88f Mon Sep 17 00:00:00 2001
From: torque <torque@epicyclic.dev>
Date: Thu, 22 Aug 2024 11:49:01 -0700
Subject: [PATCH] main: respect elevation mask

This is done silently, in the sense that the UI doesn't show that it is
clamping the requested pointing target in this way.
---
 src/main.zig | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.zig b/src/main.zig
index bc6e4cf..434f09e 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -180,10 +180,15 @@ pub const RotInt = struct {
         self.pollcount = (self.pollcount + 1) % self.command_freq;
 
         if (self.pollcount == 0) {
-            const mangled: AzEl = .{
+            var mangled: AzEl = .{
                 .az = self.requested_posture.az + self.offsets.az,
                 .el = self.requested_posture.el + self.offsets.el,
             };
+            mangled.el = if (mangled.el > 90)
+                @min(mangled.el, 180 - self.conf.elevation_mask)
+            else
+                @max(mangled.el, self.conf.elevation_mask);
+
             self.sendRotatorCommand(.{ .set_position = mangled });
         } else {
             self.sendRotatorCommand(.get_position);