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.alpha: part 4 - draw water-like surfaces in non-VISed maps when r_*alpha is set to 1

--- a/d_edge.c

+++ b/d_edge.c

@@ -185,7 +185,7 @@

 			if (!s->spans)

 				continue;

-			if((surfdrawflags(s) | entdrawflags(s->entity)) ^ r_drawflags)

+			if((surfdrawflags(s->flags) | entdrawflags(s->entity)) ^ r_drawflags)

 				continue;

 			alpha = 255;

 			if(enthasalpha(s->entity) && s->entity->alpha != 255)

--- a/d_scan.c

+++ b/d_scan.c

@@ -79,7 +79,7 @@

 	{

 		sturb = ((r_turb_s + r_turb_turb[(r_turb_t>>16)&(CYCLE-1)])>>16)&63;

 		tturb = ((r_turb_t + r_turb_turb[(r_turb_s>>16)&(CYCLE-1)])>>16)&63;

-		if (*r_turb_z <= (izi >> 16))

+		if (*r_turb_z <= (izi >> 16) || (r_drawflags & DRAW_BLEND) == 0)

 			*r_turb_pdest = blendalpha(*(r_turb_pbase + (tturb<<6) + sturb), *r_turb_pdest, alpha);

 		r_turb_s += r_turb_sstep;

 		r_turb_t += r_turb_tstep;

--- a/model.c

+++ b/model.c

@@ -1174,7 +1174,7 @@

 		mod->nummodelsurfaces = bm->numfaces;

 		mod->blend = false;

 		for(j = bm->firstface; j < bm->firstface+bm->numfaces; j++){

-			if(surfdrawflags(&loadmodel->surfaces[j]) & DRAW_BLEND){

+			if(loadmodel->surfaces[j].flags & SURF_TRANS){

 				mod->blend = true;

 				break;

 			}

--- a/r_alias.c

+++ b/r_alias.c

@@ -397,11 +397,11 @@

 	int		temp;

 	float	lightcos, *plightnormal;

-	av->fv[0] = DotProduct(pverts->v, aliastransform[0]) +

+	av->fv[0] = DotProduct_(pverts->v, aliastransform[0]) +

 			aliastransform[0][3];

-	av->fv[1] = DotProduct(pverts->v, aliastransform[1]) +

+	av->fv[1] = DotProduct_(pverts->v, aliastransform[1]) +

 			aliastransform[1][3];

-	av->fv[2] = DotProduct(pverts->v, aliastransform[2]) +

+	av->fv[2] = DotProduct_(pverts->v, aliastransform[2]) +

 			aliastransform[2][3];

 	fv->v[2] = pstverts->s;

@@ -444,7 +444,7 @@

 	for (i=0 ; i<r_anumverts ; i++, fv++, pverts++, pstverts++)

 	{

 	// transform and project

-		zi = 1.0 / (DotProduct(pverts->v, aliastransform[2]) +

+		zi = 1.0 / (DotProduct_(pverts->v, aliastransform[2]) +

 				aliastransform[2][3]);

 	// x, y, and z are scaled down by 1/2**31 in the transform, so 1/z is

@@ -452,9 +452,9 @@

 	// projection

 		fv->v[5] = zi;

-		fv->v[0] = ((DotProduct(pverts->v, aliastransform[0]) +

+		fv->v[0] = ((DotProduct_(pverts->v, aliastransform[0]) +

 				aliastransform[0][3]) * zi) + aliasxcenter;

-		fv->v[1] = ((DotProduct(pverts->v, aliastransform[1]) +

+		fv->v[1] = ((DotProduct_(pverts->v, aliastransform[1]) +

 				aliastransform[1][3]) * zi) + aliasycenter;

 		fv->v[2] = pstverts->s;

--- a/r_draw.c

+++ b/r_draw.c

@@ -50,6 +50,18 @@

 qboolean	r_lastvertvalid;

+int

+surfdrawflags(int flags)

+{

+	if(flags & SURF_TRANS){

+		if((flags & SURF_TELE) != 0 || alphafor(flags) >= 1.0f)

+			if((flags & SURF_FENCE) == 0)

+				return 0;

+		return DRAW_BLEND;

+	}

+	return 0;

+}

+

 /*

 ================

 R_EmitEdge

@@ -370,7 +382,7 @@

 	medge_t		*pedges, tedge;

 	clipplane_t	*pclip;

-	if(surfdrawflags(fa) ^ r_drawflags)

+	if(surfdrawflags(fa->flags) ^ r_drawflags)

 		return;

 // skip out if no more surfs

--- a/r_local.h

+++ b/r_local.h

@@ -6,7 +6,7 @@

 	DRAW_BLEND = 1<<0,

 };

-#define surfdrawflags(s) (((s)->flags & SURF_TRANS) ? DRAW_BLEND : 0)

+int surfdrawflags(int flags);

 #define enthasalpha(e) ((e) && !defalpha((e)->alpha))

 #define entdrawflags(e) (((e) && (!defalpha((e)->alpha) || ((e)->model && (e)->model != cl.worldmodel && (e)->model->blend))) ? DRAW_BLEND : 0)