Reduced memory footprint of sphere primitive.

Until now, spheres subject to transformation (translation, rotation, scaling etc.) required an extra data block of 256 bytes. This data block has been eliminated, along with a corresponding pointer in the sphere's basic data block.

Author: c-lipka

source/base/version.h

@@ -45,7 +45,7 @@
 #define OFFICIAL_VERSION_STRING "3.7.1"
 #define OFFICIAL_VERSION_NUMBER 371
 
-#define POV_RAY_PRERELEASE "alpha.8704732"
+#define POV_RAY_PRERELEASE "alpha.8730959"
 
 #if (POV_RAY_IS_AUTOBUILD == 1) && ((POV_RAY_IS_OFFICIAL == 1) || (POV_RAY_IS_SEMI_OFFICIAL == 1))
 #ifdef POV_RAY_PRERELEASE

source/core/shape/sphere.cpp

@@ -375,8 +375,6 @@ ObjectPtr Sphere::Copy()
     *New = *this;
     New->Trans = Copy_Transform(Trans);
 
-    New->UV_Trans = Copy_Transform(UV_Trans);
-
     return(New);
 }
 
@@ -409,20 +407,16 @@ ObjectPtr Sphere::Copy()
 
 void Sphere::Translate(const Vector3d& Vector, const TRANSFORM *tr)
 {
-    if(Trans == NULL)
+    if(!Do_Ellipsoid)
     {
-        if(UV_Trans == NULL)
-            UV_Trans = Create_Transform();
-        Compose_Transforms(UV_Trans, tr);
-
         Center += Vector;
-
-        Compute_BBox();
     }
     else
     {
-        Transform(tr);
+        Compose_Transforms(Trans, tr);
     }
+
+    Compute_BBox();
 }
 
 
@@ -455,20 +449,14 @@ void Sphere::Translate(const Vector3d& Vector, const TRANSFORM *tr)
 
 void Sphere::Rotate(const Vector3d&, const TRANSFORM *tr)
 {
-    if(Trans == NULL)
-    {
-        if (UV_Trans == NULL)
-            UV_Trans = Create_Transform();
-        Compose_Transforms(UV_Trans, tr);
+    if (Trans == NULL)
+        Trans = Create_Transform();
+    Compose_Transforms(Trans, tr);
 
+    if(!Do_Ellipsoid)
         MTransPoint(Center, Center, tr);
 
-        Compute_BBox();
-    }
-    else
-    {
-        Transform(tr);
-    }
+    Compute_BBox();
 }
 
 
@@ -503,30 +491,26 @@ void Sphere::Scale(const Vector3d& Vector, const TRANSFORM *tr)
 {
     if ((Vector[X] != Vector[Y]) || (Vector[X] != Vector[Z]))
     {
-        if (Trans == NULL)
+        if (!Do_Ellipsoid)
         {
             // treat sphere as ellipsoid as it's unevenly scaled
-            Do_Ellipsoid = true; // FIXME - parser needs to select sphere or ellipsoid
-            Trans = Create_Transform();
+            Do_Ellipsoid = true;
+            if (Trans == NULL)
+                Trans = Create_Transform();
         }
     }
 
-    if (Trans == NULL)
+    if (!Do_Ellipsoid)
     {
-        if (UV_Trans == NULL)
-            UV_Trans = Create_Transform();
-        Compose_Transforms(UV_Trans, tr);
-
         Center *= Vector[X];
-
         Radius *= fabs(Vector[X]);
-
-        Compute_BBox();
     }
     else
     {
-        Transform(tr);
+        Compose_Transforms(Trans, tr);
     }
+
+    Compute_BBox();
 }
 
 
@@ -561,7 +545,6 @@ Sphere::Sphere() :
     ObjectBase(SPHERE_OBJECT),
     Center(0.0, 0.0, 0.0),
     Radius(1.0),
-    UV_Trans(NULL),
     Do_Ellipsoid(false) // FIXME
 {}
 
@@ -593,16 +576,10 @@ Sphere::Sphere() :
 
 void Sphere::Transform(const TRANSFORM *tr)
 {
-    if (UV_Trans == NULL)
-        UV_Trans = Create_Transform();
-    Compose_Transforms(UV_Trans, tr);
+    Do_Ellipsoid = true;
 
     if(Trans == NULL)
-    {
-        Do_Ellipsoid = true;
         Trans = Create_Transform();
-    }
-
     Compose_Transforms(Trans, tr);
 
     Compute_BBox();
@@ -648,8 +625,6 @@ Sphere::~Sphere()
     Debug_Info("\t%f // Radius\n", (DBL)Radius);
     Debug_Info("}\n");
 #endif
-
-    Destroy_Transform(UV_Trans);
 }
 
 
@@ -688,7 +663,7 @@ void Sphere::Compute_BBox()
 {
     Make_BBox(BBox, Center[X] - Radius, Center[Y] - Radius,  Center[Z] - Radius, 2.0 * Radius, 2.0 * Radius, 2.0 * Radius);
 
-    if(Trans != NULL)
+    if(Do_Ellipsoid)
     {
         Recompute_BBox(&BBox, Trans);
     }
@@ -729,17 +704,15 @@ void Sphere::UVCoord(Vector2d& Result, const Intersection *Inter, TraceThreadDat
     Vector3d New_Point, New_Center;
 
     /* Transform the point into the sphere's space */
-    if (UV_Trans != NULL)
+    if (Trans != NULL)
     {
 
-        MInvTransPoint(New_Point, Inter->IPoint, UV_Trans);
+        MInvTransPoint(New_Point, Inter->IPoint, Trans);
 
-        if (Trans != NULL)
-            MTransPoint(New_Center, Center, Trans);
-        else
+        if (Do_Ellipsoid)
             New_Center = Center;
-
-        MInvTransPoint(New_Center, New_Center, UV_Trans);
+        else
+            MInvTransPoint(New_Center, Center, Trans);
     }
     else
     {

source/core/shape/sphere.h

@@ -79,8 +79,7 @@ class Sphere : public ObjectBase
 
         static bool Intersect(const BasicRay& ray, const Vector3d& Center, DBL Radius2, DBL *Depth1, DBL  *Depth2);
     private:
-        bool Do_Ellipsoid; // TODO - parser needs to take care of this
-        TRANSFORM *UV_Trans;
+        bool Do_Ellipsoid;
 };
 
 }

unix/VERSION

@@ -1 +1 @@
-3.7.1-alpha.8704732
+3.7.1-alpha.8730959