Added new render pass: "Mist".

This is actually just the alpha value as currently being calculated
by the mist code. It is in many cases not very useful to have this as
alpha in shading result, also for postprocess and composite.

Note: this pass also works with "Mist" not set in World, of course.

1 files changed, 7 insertions, 2 deletions

diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_image.c b/source/blender/nodes/intern/CMP_nodes/CMP_image.c
index 20308e968d3..0984aa4bfe1 100644
--- a/source/blender/nodes/intern/CMP_nodes/CMP_image.c
+++ b/source/blender/nodes/intern/CMP_nodes/CMP_image.c
@@ -48,6 +48,7 @@ static bNodeSocketType cmp_node_rlayers_out[]= {
 	{	SOCK_RGBA, 0, "Refract",	0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
 	{	SOCK_RGBA, 0, "Radio",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
 	{	SOCK_VALUE, 0, "IndexOB",	0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_VALUE, 0, "Mist",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
 	{	-1, 0, ""	}
 };
 
@@ -149,6 +150,8 @@ void outputs_multilayer_get(RenderData *rd, RenderLayer *rl, bNodeStack **out, I
 		out[RRES_OUT_RADIO]->data= compbuf_multilayer_get(rd, rl, ima, iuser, SCE_PASS_RADIO);
 	if(out[RRES_OUT_INDEXOB]->hasoutput)
 		out[RRES_OUT_INDEXOB]->data= compbuf_multilayer_get(rd, rl, ima, iuser, SCE_PASS_INDEXOB);
+	if(out[RRES_OUT_MIST]->hasoutput)
+		out[RRES_OUT_MIST]->data= compbuf_multilayer_get(rd, rl, ima, iuser, SCE_PASS_MIST);
 	
 };
 
@@ -236,7 +239,7 @@ static CompBuf *compbuf_from_pass(RenderData *rd, RenderLayer *rl, int rectx, in
       CompBuf *buf;
       int buftype= CB_VEC3;
 
-      if(ELEM(passcode, SCE_PASS_Z, SCE_PASS_INDEXOB))
+      if(ELEM3(passcode, SCE_PASS_Z, SCE_PASS_INDEXOB, SCE_PASS_MIST))
          buftype= CB_VAL;
       else if(passcode==SCE_PASS_VECTOR)
          buftype= CB_VEC4;
@@ -282,7 +285,9 @@ void node_composit_rlayers_out(RenderData *rd, RenderLayer *rl, bNodeStack **out
    if(out[RRES_OUT_RADIO]->hasoutput)
       out[RRES_OUT_RADIO]->data= compbuf_from_pass(rd, rl, rectx, recty, SCE_PASS_RADIO);
    if(out[RRES_OUT_INDEXOB]->hasoutput)
-      out[RRES_OUT_INDEXOB]->data= compbuf_from_pass(rd, rl, rectx, recty, SCE_PASS_INDEXOB);
+	   out[RRES_OUT_INDEXOB]->data= compbuf_from_pass(rd, rl, rectx, recty, SCE_PASS_INDEXOB);
+   if(out[RRES_OUT_MIST]->hasoutput)
+	   out[RRES_OUT_MIST]->data= compbuf_from_pass(rd, rl, rectx, recty, SCE_PASS_MIST);
 
 };