From 3f55696e092cabbb6b67adcbdc6aaecbd9c6f027 Mon Sep 17 00:00:00 2001
From: cypress <motolegacy.git@gmail.com>
Date: Sun, 7 Apr 2024 20:09:12 -0700
Subject: [PATCH] NX/VITA: Replace standard `EF_ROTATE` with one that mimicks
 Power-Up behavior

---
 source/cl_main.c | 67 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 62 insertions(+), 5 deletions(-)

diff --git a/source/cl_main.c b/source/cl_main.c
index a45212c..388b08c 100644
--- a/source/cl_main.c
+++ b/source/cl_main.c
@@ -423,6 +423,61 @@ float	CL_LerpPoint (void)
 	return frac;
 }
 
+float 	mdlflag_poweruprotate_duration 	= 0.0f;
+float 	mdlflag_poweruprotate_starttime = 0.0f;
+
+vec3_t 	mdlflag_poweruprotate_startangles;
+vec3_t 	mdlflag_poweruprotate_differenceangles;
+vec3_t 	mdlflag_poweruprotate_currentangles;
+
+double 	last_puframetime = 0.0f;
+
+/*
+===============
+CL_UpdatePowerUpAngles
+===============
+*/
+void CL_UpdatePowerUpAngles (void)
+{
+	// Don't update more than once per frame.
+	if (last_puframetime != host_frametime) {
+		// New cycle, dictate new rotation time and target angle. 
+		if (mdlflag_poweruprotate_duration <= cl.time) {
+			mdlflag_poweruprotate_starttime = cl.time;
+			mdlflag_poweruprotate_duration = cl.time + (float)((rand() % 25 + 25)/10.0f); // Take between 2.5 and 5 seconds.
+
+			mdlflag_poweruprotate_startangles[0] = mdlflag_poweruprotate_currentangles[0];
+			mdlflag_poweruprotate_startangles[1] = mdlflag_poweruprotate_currentangles[1];
+			mdlflag_poweruprotate_startangles[2] = mdlflag_poweruprotate_currentangles[2];
+
+			int target_pitch = rand() % 120 - 60;
+			int target_yaw = rand() % 240 + 60;
+			int target_roll = rand() % 90 - 45;
+
+			vec3_t target_angles;
+			target_angles[0] = target_pitch;
+			target_angles[1] = target_yaw;
+			target_angles[2] = target_roll;
+
+			// Calculate the difference from our start to our target.
+			for(int i = 0; i < 2; i++) {
+				if (mdlflag_poweruprotate_currentangles[i] > target_angles[i])
+					mdlflag_poweruprotate_differenceangles[i] = (mdlflag_poweruprotate_currentangles[i] - target_angles[i]) * -1;
+				else
+					mdlflag_poweruprotate_differenceangles[i] = fabs(mdlflag_poweruprotate_currentangles[i] - target_angles[i]);
+			}
+		}
+
+		float percentage_complete = (cl.time - mdlflag_poweruprotate_starttime) / (mdlflag_poweruprotate_duration - mdlflag_poweruprotate_starttime);
+
+		for(int j = 0; j < 2; j++) {
+			mdlflag_poweruprotate_currentangles[j] = mdlflag_poweruprotate_startangles[j] + (mdlflag_poweruprotate_differenceangles[j] * percentage_complete);
+		}
+
+		last_puframetime = host_frametime;
+	}
+}
+
 /*
 ===============
 CL_RelinkEntities
@@ -434,13 +489,14 @@ void CL_RelinkEntities (void)
 	int			i, j;
 	float		frac, f, d;
 	vec3_t		delta;
-	float		bobjrotate;
 	vec3_t		oldorg;
 	dlight_t	*dl;
 
 // determine partial update time
 	frac = CL_LerpPoint ();
 
+	CL_UpdatePowerUpAngles();
+
 	cl_numvisedicts = 0;
 
 //
@@ -464,8 +520,6 @@ void CL_RelinkEntities (void)
 		}
 	}
 
-	bobjrotate = anglemod(100*cl.time);
-
 // start on the entity after the world
 	for (i=1,ent=cl_entities+1 ; i<cl.num_entities ; i++,ent++)
 	{
@@ -525,8 +579,11 @@ void CL_RelinkEntities (void)
 		}
 
 // rotate binary objects locally
-		if (ent->model->flags & EF_ROTATE)
-			ent->angles[1] = bobjrotate;
+		if (ent->model->flags & EF_ROTATE) {
+			ent->angles[0] = mdlflag_poweruprotate_currentangles[0];
+			ent->angles[1] = mdlflag_poweruprotate_currentangles[1];
+			ent->angles[2] = mdlflag_poweruprotate_currentangles[2];
+		}
 
 		if (ent->effects & EF_MUZZLEFLASH)
 		{