From 3cfd2c0a8e0a59138f5972469d33c659672c36a9 Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Sun, 30 Dec 2001 04:16:25 +0000
Subject: [PATCH] make GL_DrawAliasShadow use the data calculated by
 GL_GetAliasFraveVerts so shadows don't cost as much when lerping is enabled.

---
 libs/video/renderer/gl/gl_mod_alias.c | 95 +++------------------------
 1 file changed, 8 insertions(+), 87 deletions(-)

diff --git a/libs/video/renderer/gl/gl_mod_alias.c b/libs/video/renderer/gl/gl_mod_alias.c
index a76c08180..ec104f2da 100644
--- a/libs/video/renderer/gl/gl_mod_alias.c
+++ b/libs/video/renderer/gl/gl_mod_alias.c
@@ -150,20 +150,19 @@ GL_DrawAliasFrame (vert_order_t *vo, qboolean fb)
 	Standard shadow drawing
 */
 static void
-GL_DrawAliasShadow (aliashdr_t *paliashdr, int posenum)
+GL_DrawAliasShadow (aliashdr_t *paliashdr, vert_order_t *vo)
 {
 	float		height, lheight;
 	int			count;
 	int		   *order;
 	vec3_t		point;
-	trivertx_t *verts;
+	blended_vert_t *verts;
 
 	lheight = currententity->origin[2] - lightspot[2];
 
 	height = 0;
-	verts = (trivertx_t *) ((byte *) paliashdr + paliashdr->posedata);
-	verts += posenum * paliashdr->poseverts;
-	order = (int *) ((byte *) paliashdr + paliashdr->commands);
+	verts = vo->verts;
+	order = vo->order;
 
 	height = -lheight + 1.0;
 
@@ -183,13 +182,13 @@ GL_DrawAliasShadow (aliashdr_t *paliashdr, int posenum)
 
 			// normals and vertexes come from the frame list
 			point[0] =
-				verts->v[0] * paliashdr->mdl.scale[0] +
+				verts->vert[0] * paliashdr->mdl.scale[0] +
 				paliashdr->mdl.scale_origin[0];
 			point[1] =
-				verts->v[1] * paliashdr->mdl.scale[1] +
+				verts->vert[1] * paliashdr->mdl.scale[1] +
 				paliashdr->mdl.scale_origin[1];
 			point[2] =
-				verts->v[2] * paliashdr->mdl.scale[2] +
+				verts->vert[2] * paliashdr->mdl.scale[2] +
 				paliashdr->mdl.scale_origin[2];
 
 			point[0] -= shadevector[0] * (point[2] + lheight);
@@ -205,79 +204,6 @@ GL_DrawAliasShadow (aliashdr_t *paliashdr, int posenum)
 	}
 }
 
-/*
-	GL_DrawAliasBlendedShadow
-         
-	Interpolated shadow drawing
-*/
-void
-GL_DrawAliasBlendedShadow (aliashdr_t *paliashdr, int pose1, int pose2,
-						   entity_t *e)
-{
-	float		blend, height, lheight, lerp;
-	int			count;
-	int		   *order;
-	trivertx_t *verts1, *verts2;
-	vec3_t		point1, point2;
-
-	blend = (r_realtime - e->frame_start_time) / e->frame_interval;
-	blend = min (blend, 1);
-	lerp = 1 - blend;
-
-	lheight = e->origin[2] - lightspot[2];
-	height = -lheight + 1.0;
-
-	verts2 = verts1 = (trivertx_t *) ((byte *) paliashdr +
-									  paliashdr->posedata);
-
-	verts1 += pose1 * paliashdr->poseverts;
-	verts2 += pose2 * paliashdr->poseverts;
-
-	order = (int *) ((byte *) paliashdr + paliashdr->commands);
-
-	while ((count = *order++)) {
-		// get the vertex count and primitive type
-		if (count < 0) {
-			count = -count;
-			qfglBegin (GL_TRIANGLE_FAN);
-		} else {
-			qfglBegin (GL_TRIANGLE_STRIP);
-		}
-
-		do {
-			order += 2;
-
-			point1[0] =	verts1->v[0] * paliashdr->mdl.scale[0] +
-				paliashdr->mdl.scale_origin[0];
-			point1[1] =	verts1->v[1] * paliashdr->mdl.scale[1] +
-				paliashdr->mdl.scale_origin[1];
-			point1[2] =	verts1->v[2] * paliashdr->mdl.scale[2] +
-				paliashdr->mdl.scale_origin[2];
-
-			point1[0] -= shadevector[0] * (point1[2] + lheight);
-			point1[1] -= shadevector[1] * (point1[2] + lheight);
-
-			point2[0] =	verts2->v[0] * paliashdr->mdl.scale[0] +
-				paliashdr->mdl.scale_origin[0];
-			point2[1] =	verts2->v[1] * paliashdr->mdl.scale[1] +
-				paliashdr->mdl.scale_origin[1];
-			point2[2] =	verts2->v[2] * paliashdr->mdl.scale[2] +
-				paliashdr->mdl.scale_origin[2];
-
-			point2[0] -= shadevector[0] * (point2[2] + lheight);
-			point2[1] -= shadevector[1] * (point2[2] + lheight);
-
-			qfglVertex3f ((point1[0] * lerp) + (point2[0] * blend),
-						(point1[1] * lerp) + (point2[1] * blend),
-						height);
-
-			verts1++;
-			verts2++;
-		} while (--count);
-		qfglEnd ();
-	}
-}
-
 vert_order_t *
 GL_GetAliasFrameVerts (int frame, aliashdr_t *paliashdr, entity_t *e)
 {
@@ -534,12 +460,7 @@ R_DrawAliasModel (entity_t *e, qboolean cull)
 		color_black[3] = (clmodel->shadow_alpha + 1) / 2;
 		qfglColor4ubv (color_black);
 
-		if (gl_lerp_anim->int_val) {
-			GL_DrawAliasBlendedShadow (paliashdr, lastposenum0, lastposenum,
-									   e);
-		} else {
-			GL_DrawAliasShadow (paliashdr, lastposenum);
-		}
+		GL_DrawAliasShadow (paliashdr, vo);
 
 		qfglEnable (GL_TEXTURE_2D);
 		qfglPopMatrix ();