Added cvar "rend-sprite-alpha". 1=Enable variable translucency on spr…

…ites.
skyjake · Sep 30, 2006 · 86ca3ba · 86ca3ba
1 parent bf7eb66
commit 86ca3ba
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Showing 2 changed files with 35 additions and 22 deletions.
diff --git a/doomsday/engine/data/cphelp.txt b/doomsday/engine/data/cphelp.txt
@@ -725,17 +725,14 @@ desc = 1=Always render the full sky sphere.
 [rend-sky-simple]
 desc = Sky rendering mode: 0=normal, 1=quads.
 
+[rend-sprite-align]
+desc = 1=Always align sprites with the view plane. 2=Align to camera, unless slant > r_maxSpriteAngle.
+
 [rend-sprite-align-angle]
 desc = Maximum angle for slanted sprites (spralign 2).
 
-[rend-sprite-noz]
-desc = 1=Don't write sprites in the Z buffer.
-
-[rend-sprite-precache]
-desc = 1=Precache sprites at level setup (slow).
-
-[rend-sprite-align]
-desc = 1=Always align sprites with the view plane. 2=Align to camera, unless slant > r_maxSpriteAngle.
+[rend-sprite-alpha]
+desc = 1=Enable variable translucency on sprites.
 
 [rend-sprite-blend]
 desc = 1=Use additive blending for explosions.
@@ -746,6 +743,12 @@ desc = 1=Sprites lit using dynamic lights.
 [rend-sprite-mode]
 desc = 1=Draw sprites and masked walls with hard edges.
 
+[rend-sprite-noz]
+desc = 1=Don't write sprites in the Z buffer.
+
+[rend-sprite-precache]
+desc = 1=Precache sprites at level setup (slow).
+
 [rend-model]
 desc = Render using 3D models when possible.
 

diff --git a/doomsday/engine/portable/src/rend_sprite.c b/doomsday/engine/portable/src/rend_sprite.c
@@ -63,18 +63,21 @@ static byte *slRGB1, *slRGB2;
 static fvertex_t slViewVec;
 static vissprite_t *slSpr;
 
+static int useSpriteAlpha = 1;
+
 // CODE --------------------------------------------------------------------
 
 void Rend_SpriteRegister(void)
 {
     // Cvars
-    C_VAR_FLOAT("rend-sprite-align-angle", &maxSpriteAngle, 0, 0, 90);
-    C_VAR_INT("rend-sprite-noz", &r_nospritez, 0, 0, 1);
-    C_VAR_BYTE("rend-sprite-precache", &r_precache_sprites, 0, 0, 1);
     C_VAR_INT("rend-sprite-align", &alwaysAlign, 0, 0, 3);
+    C_VAR_FLOAT("rend-sprite-align-angle", &maxSpriteAngle, 0, 0, 90);
+    C_VAR_INT("rend-sprite-alpha", &useSpriteAlpha, 0, 0, 1);
     C_VAR_INT("rend-sprite-blend", &missileBlend, 0, 0, 1);
     C_VAR_INT("rend-sprite-lit", &litSprites, 0, 0, 1);
     C_VAR_BYTE("rend-sprite-mode", &noSpriteTrans, 0, 0, 1);
+    C_VAR_INT("rend-sprite-noz", &r_nospritez, 0, 0, 1);
+    C_VAR_BYTE("rend-sprite-precache", &r_precache_sprites, 0, 0, 1);
 }
 
 /**
@@ -599,21 +602,28 @@ void Rend_RenderSprite(vissprite_t * spr)
     sprh = spritelumps[patch]->height;
 
     // Set the lighting and alpha.
-    if(missileBlend && spr->data.mo.flags & DDMF_BRIGHTSHADOW)
+    if(useSpriteAlpha)
     {
-        alpha = 204;            // 80 %.
-        additiveBlending = true;
+        if(missileBlend && spr->data.mo.flags & DDMF_BRIGHTSHADOW)
+        {
+            alpha = 204;            // 80 %.
+        }
+        else if(spr->data.mo.flags & DDMF_SHADOW)
+            alpha = 51;             // One third.
+        else if(spr->data.mo.flags & DDMF_ALTSHADOW)
+            alpha = 160;            // Two thirds.
+        else
+            alpha = 255;
+
+        // Sprite has a custom alpha multiplier?
+        if(spr->data.mo.alpha >= 0)
+            alpha *= spr->data.mo.alpha;
     }
-    else if(spr->data.mo.flags & DDMF_SHADOW)
-        alpha = 51;             //85;        // One third.
-    else if(spr->data.mo.flags & DDMF_ALTSHADOW)
-        alpha = 160;            // Two thirds.
     else
         alpha = 255;
 
-    // Sprite has a custom alpha multiplier?
-    if(spr->data.mo.alpha >= 0)
-        alpha *= spr->data.mo.alpha;
+    if(missileBlend && spr->data.mo.flags & DDMF_BRIGHTSHADOW)
+        additiveBlending = true;
 
     if(spr->data.mo.lightlevel < 0)
     {
@@ -787,7 +797,7 @@ void Rend_RenderSprite(vissprite_t * spr)
         // Change the blending mode.
         gl.Func(DGL_BLENDING, DGL_SRC_ALPHA, DGL_ONE);
     }
-    else if(noSpriteTrans)
+    else if(noSpriteTrans && alpha >= 250)
     {
         // Use the "no translucency" blending mode.
         GL_BlendMode(BM_ZEROALPHA);