shithub: choc

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When recording low resolution (non-longtics) Vanilla demos, carry
forward the error from angleturn caused by the reduced resolution, so
that consecutive errors can accumulate, possibly making turning slightly
smoother.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1770

--- a/src/g_game.c

+++ b/src/g_game.c

@@ -650,10 +650,20 @@

     if (lowres_turn)

     {

-        // round angleturn to the nearest 256 boundary

+        static signed short carry = 0;

+        signed short desired_angleturn;

+

+        desired_angleturn = cmd->angleturn + carry;

+

+        // round angleturn to the nearest 256 unit boundary

         // for recording demos with single byte values for turn

-        cmd->angleturn = (cmd->angleturn + 128) & 0xff00;

+        cmd->angleturn = (desired_angleturn + 128) & 0xff00;

+

+        // Carry forward the error from the reduced resolution to the

+        // next tic, so that successive small movements can accumulate.

+

+        carry = desired_angleturn - cmd->angleturn;

     }

 }