- initialize portals with all other static line specials instead of doing it separately in P_FinishLoadingLineDefs when the map isn't fully set up yet.

- replace all float use in portal.cpp with doubles.

src/p_setup.cpp

@@ -2064,9 +2064,6 @@ void P_FinishLoadingLineDef(line_t *ld, int alpha)
 		ld->special = 0;
 		break;
 	}
-
-	// [ZZ] check initial portal link
-	P_CheckPortal(ld);
 }
 // killough 4/4/98: delay using sidedefs until they are loaded
 void P_FinishLoadingLineDefs ()

src/p_spec.cpp

@@ -64,6 +64,7 @@
 #include "a_keys.h"
 #include "c_dispatch.h"
 #include "r_sky.h"
+#include "portal.h"
 
 // State.
 #include "r_state.h"
@@ -1428,6 +1429,10 @@ void P_SpawnSpecials (void)
 			}
 			break;
 
+		case Line_SetPortal:
+			P_SpawnLinePortal(&lines[i]);
+			break;
+
 		// [RH] ZDoom Static_Init settings
 		case Static_Init:
 			switch (lines[i].args[1])

src/portal.cpp

@@ -11,15 +11,15 @@
 CVAR(Int, sv_portal_recursions, 4, CVAR_ARCHIVE|CVAR_SERVERINFO)
 
 // [ZZ] lots of floats here to avoid overflowing a lot
-bool R_IntersectLines(fixed_t o1x, fixed_t o1y, fixed_t p1x, fixed_t p1y,
+bool P_IntersectLines(fixed_t o1x, fixed_t o1y, fixed_t p1x, fixed_t p1y,
 				      fixed_t o2x, fixed_t o2y, fixed_t p2x, fixed_t p2y,
 				      fixed_t& rx, fixed_t& ry)
 {
-	float xx = FIXED2FLOAT(o2x) - FIXED2FLOAT(o1x);
+	double xx = FIXED2DBL(o2x) - FIXED2DBL(o1x);
-	float xy = FIXED2FLOAT(o2y) - FIXED2FLOAT(o1y);
+	double xy = FIXED2DBL(o2y) - FIXED2DBL(o1y);
 
-	float d1x = FIXED2FLOAT(p1x) - FIXED2FLOAT(o1x);
+	double d1x = FIXED2DBL(p1x) - FIXED2DBL(o1x);
-	float d1y = FIXED2FLOAT(p1y) - FIXED2FLOAT(o1y);
+	double d1y = FIXED2DBL(p1y) - FIXED2DBL(o1y);
 
 	if (d1x > d1y)
 	{
@@ -32,14 +32,14 @@ bool R_IntersectLines(fixed_t o1x, fixed_t o1y, fixed_t p1x, fixed_t p1y,
 		d1y = 32767.0;
 	}
 
-	float d2x = FIXED2FLOAT(p2x) - FIXED2FLOAT(o2x);
+	double d2x = FIXED2DBL(p2x) - FIXED2DBL(o2x);
-	float d2y = FIXED2FLOAT(p2y) - FIXED2FLOAT(o2y);
+	double d2y = FIXED2DBL(p2y) - FIXED2DBL(o2y);
 
-	float cross = d1x*d2y - d1y*d2x;
+	double cross = d1x*d2y - d1y*d2x;
 	if (fabs(cross) < 1e-8)
 		return false;
 
-	float t1 = (xx * d2y - xy * d2x)/cross;
+	double t1 = (xx * d2y - xy * d2x)/cross;
 	rx = o1x + FLOAT2FIXED(d1x * t1);
 	ry = o1y + FLOAT2FIXED(d1y * t1);
 	return true;
@@ -53,8 +53,8 @@ inline int P_PointOnLineSideExplicit (fixed_t x, fixed_t y, fixed_t x1, fixed_t
 bool P_ClipLineToPortal(line_t* line, line_t* portal, fixed_t viewx, fixed_t viewy, bool partial, bool samebehind)
 {
 	// check if this line is between portal and the viewer. clip away if it is.
-	bool behind1 = !!P_PointOnLineSide(line->v1->x, line->v1->y, portal);
+	bool behind1 = !!P_PointOnLineSidePrecise(line->v1->x, line->v1->y, portal);
-	bool behind2 = !!P_PointOnLineSide(line->v2->x, line->v2->y, portal);
+	bool behind2 = !!P_PointOnLineSidePrecise(line->v2->x, line->v2->y, portal);
 
 	// [ZZ] update 16.12.2014: if a vertex equals to one of portal's vertices, it's treated as being behind the portal.
 	//                         this is required in order to clip away diagonal lines around the portal (example: 1-sided triangle shape with a mirror on it's side)
@@ -69,8 +69,8 @@ bool P_ClipLineToPortal(line_t* line, line_t* portal, fixed_t viewx, fixed_t vie
 	{
 		// line is behind the portal plane. now check if it's in front of two view plane borders (i.e. if it will get in the way of rendering)
 		fixed_t dummyx, dummyy;
-		bool infront1 = R_IntersectLines(line->v1->x, line->v1->y, line->v2->x, line->v2->y, viewx, viewy, portal->v1->x, portal->v1->y, dummyx, dummyy);
+		bool infront1 = P_IntersectLines(line->v1->x, line->v1->y, line->v2->x, line->v2->y, viewx, viewy, portal->v1->x, portal->v1->y, dummyx, dummyy);
-		bool infront2 = R_IntersectLines(line->v1->x, line->v1->y, line->v2->x, line->v2->y, viewx, viewy, portal->v2->x, portal->v2->y, dummyx, dummyy);
+		bool infront2 = P_IntersectLines(line->v1->x, line->v1->y, line->v2->x, line->v2->y, viewx, viewy, portal->v2->x, portal->v2->y, dummyx, dummyy);
 		if (infront1 && infront2)
 			return true;
 	}
@@ -78,9 +78,7 @@ bool P_ClipLineToPortal(line_t* line, line_t* portal, fixed_t viewx, fixed_t vie
 	return false;
 }
 
-bool P_CheckPortal(line_t* line)
+void P_SpawnLinePortal(line_t* line)
-{
-	if (line->special == Line_SetPortal)
 {
 	// portal destination is special argument #0
 	line_t* dst = NULL;
@@ -114,8 +112,6 @@ bool P_CheckPortal(line_t* line)
 		line->_portal_dst = NULL;
 	}
 }
-	return (line->_portal);
-}
 
 void P_TranslatePortalXY(line_t* src, line_t* dst, fixed_t& x, fixed_t& y)
 {
@@ -222,9 +218,9 @@ fixed_t P_PointLineDistance(line_t* line, fixed_t x, fixed_t y)
 
 void P_NormalizeVXVY(fixed_t& vx, fixed_t& vy)
 {
-	float _vx = FIXED2FLOAT(vx);
+	double _vx = FIXED2DBL(vx);
-	float _vy = FIXED2FLOAT(vy);
+	double _vy = FIXED2DBL(vy);
-	float len = sqrt(_vx*_vx+_vy*_vy);
+	double len = sqrt(_vx*_vx+_vy*_vy);
 	vx = FLOAT2FIXED(_vx/len);
 	vy = FLOAT2FIXED(_vy/len);
 }
@@ -339,7 +335,7 @@ bool PortalTracer::TraceStep()
 		}
 	}
 
-	//Printf("returning %d; vx = %.2f; vy = %.2f\n", (oDepth != depth), FIXED2FLOAT(this->vx), FIXED2FLOAT(this->vy));
+	//Printf("returning %d; vx = %.2f; vy = %.2f\n", (oDepth != depth), FIXED2DBL(this->vx), FIXED2DBL(this->vy));
 
 	return (oDepth != depth); // if a portal has been found, return false
 }

src/portal.h

@@ -8,10 +8,11 @@
 #include "p_local.h"
 #include "m_bbox.h"
 
+void P_SpawnLinePortal(line_t* line);
+
 
 /* code ported from prototype */
 bool P_ClipLineToPortal(line_t* line, line_t* portal, fixed_t viewx, fixed_t viewy, bool partial = true, bool samebehind = true);
-bool P_CheckPortal(line_t* line);
 void P_TranslatePortalXY(line_t* src, line_t* dst, fixed_t& x, fixed_t& y);
 void P_TranslatePortalVXVY(line_t* src, line_t* dst, fixed_t& vx, fixed_t& vy);
 void P_TranslatePortalAngle(line_t* src, line_t* dst, angle_t& angle);