Make objects view more consistently without the need for findZPos

Source/PluginProcessor.h

@@ -147,7 +147,7 @@ public:
         perspectiveEffect,
         std::vector<EffectParameter*>{
             new EffectParameter("3D Perspective", "Controls the strength of the 3D perspective projection.", "perspectiveStrength", VERSION_HINT, 1.0, 0.0, 1.0),
-            new EffectParameter("Focal Length", "Controls the focal length of the 3D perspective effect. A higher focal length makes the image look more flat, and a lower focal length makes the image look more 3D.", "perspectiveFocalLength", VERSION_HINT, 1.0, 0.0, 10.0),
+            new EffectParameter("Focal Length", "Controls the focal length of the 3D perspective effect. A higher focal length makes the image look more flat, and a lower focal length makes the image look more 3D.", "perspectiveFocalLength", VERSION_HINT, 2.0, 0.0, 10.0),
             new EffectParameter("Distance (z)", "Controls how far away the 3D object is drawn away from the camera (the Z position).", "perspectiveZPos", VERSION_HINT, 0.0, -10.0, 10.0),
             new EffectParameter("Rotate Speed", "Controls how fast the 3D object rotates in the direction determined by the rotation sliders below.", "perspectiveRotateSpeed", VERSION_HINT, 0.0, -1.0, 1.0),
             new EffectParameter("Rotate X", "Controls the rotation of the object in the X axis.", "perspectiveRotateX", VERSION_HINT, 1.0, -1.0, 1.0),

Source/obj/WorldObject.cpp

@@ -58,11 +58,20 @@ WorldObject::WorldObject(const std::string& obj_string) {
     // normalising object vertices
     //
     double x = 0.0, y = 0.0, z = 0.0;
-    double max = 0.0;
     for (int i = 0; i < numVertices; i++) {
         x += vs[i * 3];
         y += vs[i * 3 + 1];
         z += vs[i * 3 + 2];
+    }
+    x /= numVertices;
+    y /= numVertices;
+    z /= numVertices;
+
+    double max = 0.0;
+    for (int i = 0; i < numVertices; i++) {
+        vs[i * 3] = vs[i * 3] - x;
+        vs[i * 3 + 1] = vs[i * 3 + 1] - y;
+        vs[i * 3 + 2] = vs[i * 3 + 2] - z;
         if (std::abs(vs[i * 3]) > max) {
             max = std::abs(vs[i * 3]);
         }
@@ -73,14 +82,12 @@ WorldObject::WorldObject(const std::string& obj_string) {
             max = std::abs(vs[i * 3 + 2]);
         }
     }
-    x /= numVertices;
-    y /= numVertices;
-    z /= numVertices;
 
-    for (int i = 0; i < numVertices; i++) {
-        vs[i * 3] = (vs[i * 3] - x) / max;
-        vs[i * 3 + 1] = (vs[i * 3 + 1] - y) / max;
-        vs[i * 3 + 2] = (vs[i * 3 + 2] - z) / max;
+    // scaling down so that it's slightly smaller
+    max = 1.75 * max;
+
+    for (int i = 0; i < vs.size(); i++) {
+        vs[i] /= max;
     }
 
     //