Cycles / Hair: Further cleanup of UI and internals.

* UI: Remove deprecated condition (CURVE_RIBBONS) and hide backface property, when it's hardcoded in C (Curve/Line segments && Ribbons).

* Remove "use_tangent_normal" and "CURVE_KN_TANGENTGNORMAL" as its unused (follow up for last commit).

5 files changed, 6 insertions, 15 deletions

diff --git a/intern/cycles/blender/addon/ui.py b/intern/cycles/blender/addon/ui.py
index 8f81e93f7c8..83483cbcae9 100644
--- a/intern/cycles/blender/addon/ui.py
+++ b/intern/cycles/blender/addon/ui.py
@@ -1172,13 +1172,12 @@ class CyclesRender_PT_CurveRendering(CyclesButtonsPanel, Panel):
         layout.prop(ccscene, "primitive", text="Primitive")
         layout.prop(ccscene, "shape", text="Shape")
 
-        if ccscene.primitive == 'TRIANGLES':
-            if ccscene.shape == 'THICK':
-                layout.prop(ccscene, "resolution", text="Resolution")
-        elif ccscene.primitive == 'LINE_SEGMENTS':
-            layout.prop(ccscene, "cull_backfacing", text="Cull back-faces")
-        elif ccscene.primitive in {'CURVE_SEGMENTS', 'CURVE_RIBBONS'}:
+        if (ccscene.primitive in {'CURVE_SEGMENTS', 'LINE_SEGMENTS'} and ccscene.shape == 'RIBBONS') == False:
             layout.prop(ccscene, "cull_backfacing", text="Cull back-faces")
+
+        if ccscene.primitive == 'TRIANGLES' and ccscene.shape == 'THICK':
+            layout.prop(ccscene, "resolution", text="Resolution")
+        elif ccscene.primitive == 'CURVE_SEGMENTS':
             layout.prop(ccscene, "subdivisions", text="Curve subdivisions")
 
         row = layout.row()
diff --git a/intern/cycles/blender/blender_curves.cpp b/intern/cycles/blender/blender_curves.cpp
index d13c532533e..7e8eb3aa374 100644
--- a/intern/cycles/blender/blender_curves.cpp
+++ b/intern/cycles/blender/blender_curves.cpp
@@ -710,13 +710,11 @@ void BlenderSync::sync_curve_settings()
 		curve_system_manager->line_method = CURVE_UNCORRECTED;
 		curve_system_manager->use_encasing = true;
 		curve_system_manager->use_backfacing = false;
-		curve_system_manager->use_tangent_normal = true;
 		curve_system_manager->use_tangent_normal_geometry = true;
 	}
 	else if(curve_system_manager->primitive == CURVE_LINE_SEGMENTS && curve_system_manager->curve_shape == CURVE_THICK) {
 		curve_system_manager->line_method = CURVE_ACCURATE;
 		curve_system_manager->use_encasing = false;
-		curve_system_manager->use_tangent_normal = false;
 		curve_system_manager->use_tangent_normal_geometry = false;
 	}
 	else if(curve_system_manager->primitive == CURVE_SEGMENTS && curve_system_manager->curve_shape == CURVE_RIBBON) {
diff --git a/intern/cycles/kernel/kernel_types.h b/intern/cycles/kernel/kernel_types.h
index fb63ebb2e7a..9b1893e8baa 100644
--- a/intern/cycles/kernel/kernel_types.h
+++ b/intern/cycles/kernel/kernel_types.h
@@ -792,8 +792,7 @@ typedef enum CurveFlag {
 	CURVE_KN_ACCURATE = 8,					/* use accurate intersections test? */
 	CURVE_KN_INTERSECTCORRECTION = 16,		/* correct for width after determing closest midpoint? */
 	CURVE_KN_TRUETANGENTGNORMAL = 32,		/* use tangent normal for geometry? */
-	CURVE_KN_TANGENTGNORMAL = 64,			/* use tangent normal for shader? */
-	CURVE_KN_RIBBONS = 128,					/* use flat curve ribbons */
+	CURVE_KN_RIBBONS = 64,					/* use flat curve ribbons */
 } CurveFlag;
 
 typedef struct KernelCurves {
diff --git a/intern/cycles/render/curves.cpp b/intern/cycles/render/curves.cpp
index 4e7f598751e..574ad4f6ca0 100644
--- a/intern/cycles/render/curves.cpp
+++ b/intern/cycles/render/curves.cpp
@@ -92,7 +92,6 @@ CurveSystemManager::CurveSystemManager()
 	use_curves = true;
 	use_encasing = true;
 	use_backfacing = false;
-	use_tangent_normal = false;
 	use_tangent_normal_geometry = false;
 
 	need_update = true;
@@ -127,8 +126,6 @@ void CurveSystemManager::device_update(Device *device, DeviceScene *dscene, Scen
 		else if(line_method == CURVE_CORRECTED)
 			kcurve->curveflags |= CURVE_KN_INTERSECTCORRECTION;
 
-		if(use_tangent_normal)
-			kcurve->curveflags |= CURVE_KN_TANGENTGNORMAL;
 		if(use_tangent_normal_geometry)
 			kcurve->curveflags |= CURVE_KN_TRUETANGENTGNORMAL;
 		if(use_backfacing)
@@ -158,7 +155,6 @@ bool CurveSystemManager::modified(const CurveSystemManager& CurveSystemManager)
 		line_method == CurveSystemManager.line_method &&
 		primitive == CurveSystemManager.primitive &&
 		use_encasing == CurveSystemManager.use_encasing &&
-		use_tangent_normal == CurveSystemManager.use_tangent_normal &&
 		use_tangent_normal_geometry == CurveSystemManager.use_tangent_normal_geometry &&
 		encasing_ratio == CurveSystemManager.encasing_ratio &&
 		minimum_width == CurveSystemManager.minimum_width &&
diff --git a/intern/cycles/render/curves.h b/intern/cycles/render/curves.h
index 0759d495561..8020a93e77e 100644
--- a/intern/cycles/render/curves.h
+++ b/intern/cycles/render/curves.h
@@ -97,7 +97,6 @@ public:
 	bool use_curves;
 	bool use_encasing;
 	bool use_backfacing;
-	bool use_tangent_normal;
 	bool use_tangent_normal_geometry;
 
 	bool need_update;