[renderer] Clean up r_origin and modelorg

So far, in gl and glsl, but viewposition is much clearer than r_origin
(despite being the same thing), and modelorg is just confusing (I think
it's the view position relative to the current model).

include/QF/plugin/vid_render.h

@@ -135,10 +135,6 @@ typedef struct vid_render_data_s {
 	double      frametime;
 	double      realtime;
 	lightstyle_t *lightstyle;
-	vec_t      *origin;
-	vec_t      *vpn;
-	vec_t      *vright;
-	vec_t      *vup;
 } vid_render_data_t;
 
 #endif // __QF_plugin_vid_render_h

libs/video/renderer/gl/gl_dyn_lights.c

@@ -81,7 +81,7 @@ R_RenderDlight (dlight_t *light)
 	bub_cos = gl_bubble_costable;
 	rad = light->radius * 0.35;
 
-	VectorSubtract (light->origin, r_origin, v);
+	VectorSubtract (r_refdef.viewposition, light->origin, v);
 	if (VectorLength (v) < rad)				// view is inside the dlight
 		return;
 
@@ -89,7 +89,6 @@ R_RenderDlight (dlight_t *light)
 
 	qfglColor4fv (light->color);
 
-	VectorSubtract (r_origin, light->origin, v);
 	VectorNormalize (v);
 
 	for (i = 0; i < 3; i++)

libs/video/renderer/gl/gl_mod_alias.c

@@ -440,8 +440,6 @@ gl_R_DrawAliasModel (entity_t *e)
 		return;
 	}
 
-	VectorSubtract (r_origin, origin, modelorg);
-
 	gl_modelalpha = e->renderer.colormod[3];
 
 	is_fullbright = (model->fullbright || e->renderer.fullbright);

libs/video/renderer/gl/gl_mod_sprite.c

@@ -68,8 +68,7 @@ R_DrawSpriteModel_f (entity_t *e)
 	mspriteframe_t	*frame;
 
 	origin = Transform_GetWorldPosition (e->transform);
-	VectorCopy (r_origin, cameravec);
-	cameravec -= origin;
+	cameravec = r_refdef.viewposition - origin;
 
 	// don't bother culling, it's just a single polygon without a surface cache
 	frame = R_GetSpriteFrame (sprite, &e->animation);

libs/video/renderer/gl/gl_rmain.c

@@ -331,20 +331,15 @@ gl_R_SetupFrame (void)
 	EntQueue_Clear (r_ent_queue);
 	r_framecount++;
 
-	// build the transformation matrix for the given view angles
-	VectorCopy (r_refdef.viewposition, r_origin);
-
-	VectorCopy (qvmulf (r_refdef.viewrotation, (vec4f_t) { 1, 0, 0, 0 }), vpn);
-	VectorCopy (qvmulf (r_refdef.viewrotation, (vec4f_t) { 0, -1, 0, 0 }), vright);
-	VectorCopy (qvmulf (r_refdef.viewrotation, (vec4f_t) { 0, 0, 1, 0 }), vup);
-
+	vec4f_t     position = r_refdef.viewposition;
+	vec4f_t     rotation = r_refdef.viewrotation;
+	VectorCopy (qvmulf (rotation, (vec4f_t) { 1, 0, 0, 0 }), vpn);
+	VectorCopy (qvmulf (rotation, (vec4f_t) { 0, -1, 0, 0 }), vright);
+	VectorCopy (qvmulf (rotation, (vec4f_t) { 0, 0, 1, 0 }), vup);
 
 	R_SetFrustum ();
 
-	// current viewleaf
-	r_viewleaf = Mod_PointInLeaf (r_origin, r_worldentity.renderer.model);
-
-	r_cache_thrash = false;
+	r_viewleaf = Mod_PointInLeaf (&position[0], r_worldentity.renderer.model);
 }
 
 static void

libs/video/renderer/gl/gl_rsurf.c

@@ -565,13 +565,13 @@ gl_R_DrawBrushModel (entity_t *e)
 			return;
 	}
 
-	VectorSubtract (r_refdef.viewposition, worldMatrix[3], modelorg);
+	vec4f_t     relviewpos = r_refdef.viewposition - worldMatrix[3];
 	if (rotated) {
-		vec4f_t     temp = { modelorg[0], modelorg[1], modelorg[2], 0 };
+		vec4f_t     temp = relviewpos;
 
-		modelorg[0] = dotf (temp, worldMatrix[0])[0];
-		modelorg[1] = dotf (temp, worldMatrix[1])[0];
-		modelorg[2] = dotf (temp, worldMatrix[2])[0];
+		relviewpos[0] = dotf (temp, worldMatrix[0])[0];
+		relviewpos[1] = dotf (temp, worldMatrix[1])[0];
+		relviewpos[2] = dotf (temp, worldMatrix[2])[0];
 	}
 
 	// calculate dynamic lighting for bmodel if it's not an instanced model
@@ -601,7 +601,7 @@ gl_R_DrawBrushModel (entity_t *e)
 		// find which side of the node we are on
 		plane_t    *plane = surf->plane;
 
-		dot = DotProduct (modelorg, plane->normal) - plane->dist;
+		dot = DotProduct (relviewpos, plane->normal) - plane->dist;
 
 		// draw the polygon
 		if (((surf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
@@ -626,10 +626,11 @@ get_side (mnode_t *node)
 {
 	// find which side of the node we are on
 	plane_t    *plane = node->plane;
+	vec4f_t     org = r_refdef.viewposition;
 
 	if (plane->type < 3)
-		return (modelorg[plane->type] - plane->dist) < 0;
-	return (DotProduct (modelorg, plane->normal) - plane->dist) < 0;
+		return (org[plane->type] - plane->dist) < 0;
+	return (DotProduct (org, plane->normal) - plane->dist) < 0;
 }
 
 static inline void
@@ -728,8 +729,6 @@ gl_R_DrawWorld (void)
 	memset (&worldent, 0, sizeof (worldent));
 	worldent.renderer.model = r_worldentity.renderer.model;
 
-	VectorCopy (r_refdef.viewposition, modelorg);
-
 	sky_chain = 0;
 	sky_chain_tail = &sky_chain;
 	if (!gl_sky_clip->int_val) {

libs/video/renderer/gl/gl_sky_clip.c

@@ -645,12 +645,13 @@ EmitSkyPolys (float speedscale, const instsurf_t *sc)
 	glpoly_t   *p;
 	vec3_t      dir;
 	msurface_t *surf = sc->surface;
+	vec4f_t     origin = r_refdef.viewposition;
 
 	//FIXME transform/color
 	for (p = surf->polys; p; p = p->next) {
 		qfglBegin (GL_POLYGON);
 		for (i = 0, v = p->verts[0]; i < p->numverts; i++, v += VERTEXSIZE) {
-			VectorSubtract (v, r_origin, dir);
+			VectorSubtract (v, origin, dir);
 			dir[2] *= 3.0;	// flatten the sphere
 
 			length = DotProduct (dir, dir);

libs/video/renderer/glsl/glsl_bsp.c

@@ -744,10 +744,11 @@ get_side (mnode_t *node)
 {
 	// find the node side on which we are
 	plane_t    *plane = node->plane;
+	vec4f_t     org = r_refdef.viewposition;
 
 	if (plane->type < 3)
-		return (r_origin[plane->type] - plane->dist) < 0;
-	return (DotProduct (r_origin, plane->normal) - plane->dist) < 0;
+		return (org[plane->type] - plane->dist) < 0;
+	return (DotProduct (org, plane->normal) - plane->dist) < 0;
 }
 
 static inline void
@@ -1000,7 +1001,7 @@ spin (mat4_t mat)
 	QuatBlend (sky_rotation[0], sky_rotation[1], blend, q);
 	QuatMult (sky_fix, q, q);
 	Mat4Identity (mat);
-	VectorNegate (r_origin, mat + 12);
+	VectorNegate (r_refdef.viewposition, mat + 12);
 	QuatToMatrix (q, m, 1, 1);
 	Mat4Mult (m, mat, mat);
 }

libs/video/renderer/glsl/glsl_main.c

@@ -100,16 +100,15 @@ glsl_R_SetupFrame (void)
 	EntQueue_Clear (r_ent_queue);
 	r_framecount++;
 
-	VectorCopy (r_refdef.viewposition, r_origin);
+	vec4f_t     position = r_refdef.viewposition;
 	vec4f_t     rotation = r_refdef.viewrotation;
 	VectorCopy (qvmulf (rotation, (vec4f_t) { 1, 0, 0, 0 }), vpn);
 	VectorCopy (qvmulf (rotation, (vec4f_t) { 0,-1, 0, 0 }), vright);
 	VectorCopy (qvmulf (rotation, (vec4f_t) { 0, 0, 1, 0 }), vup);
 
-
 	R_SetFrustum ();
 
-	r_viewleaf = Mod_PointInLeaf (r_origin, r_worldentity.renderer.model);
+	r_viewleaf = Mod_PointInLeaf (&position[0], r_worldentity.renderer.model);
 }
 
 static void

libs/video/renderer/glsl/glsl_sprite.c

@@ -229,8 +229,7 @@ glsl_R_DrawSprite (entity_t *ent)
 	};
 
 	vec4f_t     origin = Transform_GetWorldPosition (ent->transform);
-	VectorCopy (r_origin, cameravec);
-	cameravec -= origin;
+	cameravec = r_refdef.viewposition - origin;
 
 	if (!R_BillboardFrame (ent, sprite->type, &cameravec[0],
 						   &svup[0], &svright[0], &svpn[0])) {

libs/video/renderer/r_graph.c

@@ -95,7 +95,7 @@ R_ZGraph (void)
 	else
 		w = 256;
 
-	height[r_framecount & 255] = ((int) r_origin[2]) & 31;
+	height[r_framecount & 255] = ((int) r_refdef.viewposition[2]) & 31;
 
 	x = 0;
 	vr_funcs->R_LineGraph (x, r_refdef.vrect.height - 2, height,

libs/video/renderer/r_main.c

@@ -115,9 +115,10 @@ R_SetFrustum (void)
 	RotatePointAroundVector (frustum[3].normal, vright, vpn,
 							 -(90 - r_refdef.fov_y / 2));
 
+	vec4f_t     origin = r_refdef.viewposition;
 	for (i = 0; i < 4; i++) {
 		frustum[i].type = PLANE_ANYZ;
-		frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
+		frustum[i].dist = DotProduct (origin, frustum[i].normal);
 		frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 	}
 }

libs/video/renderer/vid_common.c

@@ -51,7 +51,6 @@ vid_render_data_t vid_render_data = {
 	0,
 	0.0, 0.0,
 	0,
-	r_origin, vpn, vright, vup
 };
 
 vid_render_funcs_t *vid_render_funcs;