From 6deea1a5d78ffed8662af44e9405737bc8e837b1 Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Mon, 29 Sep 2008 17:55:11 +0000
Subject: Bugfix #17711

SunSky didn't include skycolor in raytrace.
Note: there seems to be  an error in sunsky when looking straight down,
so this option requires raytracing stuff not in outer space. :)
---
 .../blender/render/intern/include/pixelshading.h   |  2 +-
 source/blender/render/intern/source/pixelshading.c | 64 +++++++++++-----------
 source/blender/render/intern/source/rayshade.c     |  3 +
 3 files changed, 35 insertions(+), 34 deletions(-)

(limited to 'source/blender/render')

diff --git a/source/blender/render/intern/include/pixelshading.h b/source/blender/render/intern/include/pixelshading.h
index 15d696df89d..c6b11b4af9a 100644
--- a/source/blender/render/intern/include/pixelshading.h
+++ b/source/blender/render/intern/include/pixelshading.h
@@ -56,7 +56,7 @@ int shadeHaloFloat(HaloRen *har,
 void shadeSkyPixel(float *collector, float fx, float fy);
 void shadeSkyView(float *colf, float *rco, float *view, float *dxyview);
 void shadeAtmPixel(struct SunSky *sunsky, float *collector, float fx, float fy, float distance);
-
+void shadeSunView(float *colf, float *view);
 /* ------------------------------------------------------------------------- */
 
 #endif
diff --git a/source/blender/render/intern/source/pixelshading.c b/source/blender/render/intern/source/pixelshading.c
index a13829d0306..60723963af9 100644
--- a/source/blender/render/intern/source/pixelshading.c
+++ b/source/blender/render/intern/source/pixelshading.c
@@ -570,27 +570,37 @@ void shadeSkyView(float *colf, float *rco, float *view, float *dxyview)
 }
 
 /* shade sky according to sun lamps, all parameters are like shadeSkyView except sunsky*/
-void shadeSunView(struct SunSky *sunsky, float *colf, float *rco, float *view, float *dxyview)
+void shadeSunView(float *colf, float *view)
 {
-	float colorxyz[3];
+	GroupObject *go;
+	LampRen *lar;
+	float sview[3];
+	int do_init= 1;
+	
+	for(go=R.lights.first; go; go= go->next) {
+		lar= go->lampren;
+		if(lar->type==LA_SUN &&	lar->sunsky && (lar->sunsky->effect_type & LA_SUN_EFFECT_SKY)){
+			float sun_collector[3];
+			float colorxyz[3];
 			
-	/**
-	sunAngle = sqrt(sunsky->sunSolidAngle / M_PI);
-
-	sunDir[0] = sunsky->toSun[0];
-	sunDir[1] = sunsky->toSun[1];
-	sunDir[2] = sunsky->toSun[2];
-	*/
+			if(do_init) {
+				
+				VECCOPY(sview, view);
+				Normalize(sview);
+				MTC_Mat3MulVecfl(R.imat, sview);
+				if (sview[2] < 0.0)
+					sview[2] = 0.0;
+				Normalize(sview);
+				do_init= 0;
+			}
 			
-	Normalize(view);
-	MTC_Mat3MulVecfl(R.imat, view);
-	if (view[2] < 0.0)
-		view[2] = 0.0;
-	Normalize(view);
-	
-	GetSkyXYZRadiancef(sunsky, view, colorxyz);
-	
-	xyz_to_rgb(colorxyz[0], colorxyz[1], colorxyz[2], &colf[0], &colf[1], &colf[2], sunsky->sky_colorspace);
+			GetSkyXYZRadiancef(lar->sunsky, sview, colorxyz);
+			xyz_to_rgb(colorxyz[0], colorxyz[1], colorxyz[2], &sun_collector[0], &sun_collector[1], &sun_collector[2], 
+					   lar->sunsky->sky_colorspace);
+			
+			ramp_blend(lar->sunsky->skyblendtype, colf, colf+1, colf+2, lar->sunsky->skyblendfac, sun_collector);
+		}
+	}
 }
 
 
@@ -599,8 +609,6 @@ void shadeSunView(struct SunSky *sunsky, float *colf, float *rco, float *view, f
  */
 void shadeSkyPixel(float *collector, float fx, float fy) 
 {
-	GroupObject *go;
-	LampRen *lar;
 	float view[3], dxyview[2];
 
 	/*
@@ -648,19 +656,9 @@ void shadeSkyPixel(float *collector, float fx, float fy)
 		shadeSkyView(collector, NULL, view, dxyview);
 		collector[3] = 0.0f;
 	}
-		
-	for(go=R.lights.first; go; go= go->next) {
-		lar= go->lampren;
-		if(lar->type==LA_SUN &&	lar->sunsky && (lar->sunsky->effect_type & LA_SUN_EFFECT_SKY)){
-			float sun_collector[3];
-			
-			calc_view_vector(view, fx, fy);
-			Normalize(view);
-
-			shadeSunView(lar->sunsky, sun_collector, NULL, view, NULL);
-			ramp_blend(lar->sunsky->skyblendtype, collector, collector+1, collector+2, lar->sunsky->skyblendfac, sun_collector);
-		}
-	}
+	
+	calc_view_vector(view, fx, fy);
+	shadeSunView(collector, view);
 }
 
 /* aerial perspective */
diff --git a/source/blender/render/intern/source/rayshade.c b/source/blender/render/intern/source/rayshade.c
index 48ae84379ba..9d457e7f0fc 100644
--- a/source/blender/render/intern/source/rayshade.c
+++ b/source/blender/render/intern/source/rayshade.c
@@ -397,6 +397,7 @@ static void ray_fadeout_endcolor(float *col, ShadeInput *origshi, ShadeInput *sh
 		Normalize(shi->view);
 		
 		shadeSkyView(col, isec->start, shi->view, NULL);
+		shadeSunView(col, shi->view);
 	}
 }
 
@@ -1627,6 +1628,7 @@ static void ray_ao_qmc(ShadeInput *shi, float *shadfac)
 			}
 			else {	/* WO_AOSKYTEX */
 				shadeSkyView(skycol, isec.start, view, dxyview);
+				shadeSunView(skycol, shi->view);
 				shadfac[0]+= skycol[0];
 				shadfac[1]+= skycol[1];
 				shadfac[2]+= skycol[2];
@@ -1751,6 +1753,7 @@ static void ray_ao_spheresamp(ShadeInput *shi, float *shadfac)
 				}
 				else {	/* WO_AOSKYTEX */
 					shadeSkyView(skycol, isec.start, view, dxyview);
+					shadeSunView(skycol, shi->view);
 					shadfac[0]+= skycol[0];
 					shadfac[1]+= skycol[1];
 					shadfac[2]+= skycol[2];
-- 
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