shape: center node

app/node/distort/transform/transformdistortnode.cpp

@@ -415,7 +415,7 @@ void TransformDistortNode::DrawGizmos(const NodeValueRow &row, const NodeGlobals
 
   // Get the sequence resolution
   const QVector2D &sequence_res = globals.resolution();
-  QVector2D sequence_half_res = sequence_res/2;
+  QVector2D sequence_half_res = sequence_res * 0.5;
   QPointF sequence_half_res_pt = sequence_half_res.toPointF();
 
   // GizmoTraverser just returns the sizes of the textures and no other data
@@ -488,7 +488,7 @@ void TransformDistortNode::DrawGizmos(const NodeValueRow &row, const NodeGlobals
 
   // Use offsets to make the appearance of values that start in the top left, even though we
   // really anchor around the center
-  SetInputProperty(kPositionInput, QStringLiteral("offset"), sequence_res * 0.5);
+  SetInputProperty(kPositionInput, QStringLiteral("offset"), sequence_half_res);
   SetInputProperty(kAnchorInput, QStringLiteral("offset"), tex_sz * 0.5);
 }
 

app/node/generator/shape/shapenode.cpp

@@ -79,4 +79,11 @@ void ShapeNode::Value(const NodeValueRow &value, const NodeGlobals &globals, Nod
   table->Push(NodeValue::kShaderJob, QVariant::fromValue(job), this);
 }
 
+void ShapeNode::DrawGizmos(const NodeValueRow &row, const NodeGlobals &globals, QPainter *p)
+{
+  // Use offsets to make the appearance of values that start in the top left, even though we
+  // really anchor around the center
+  SetInputProperty(kPositionInput, QStringLiteral("offset"), globals.resolution() * 0.5);
+}
+
 }

app/node/generator/shape/shapenode.h

@@ -49,6 +49,13 @@ public:
   virtual ShaderCode GetShaderCode(const QString& shader_id) const override;
   virtual void Value(const NodeValueRow& value, const NodeGlobals &globals, NodeValueTable *table) const override;
 
+  virtual bool HasGizmos() const override
+  {
+    return true;
+  }
+
+  virtual void DrawGizmos(const NodeValueRow &row, const NodeGlobals &globals, QPainter *p) override;
+
   static QString kTypeInput;
 
 private:

app/node/generator/shape/shapenodebase.cpp

@@ -32,7 +32,7 @@ QString ShapeNodeBase::kColorInput = QStringLiteral("color_in");
 
 ShapeNodeBase::ShapeNodeBase()
 {
-  AddInput(kPositionInput, NodeValue::kVec2, QVector2D(10, 10));
+  AddInput(kPositionInput, NodeValue::kVec2, QVector2D(0, 0));
   AddInput(kSizeInput, NodeValue::kVec2, QVector2D(100, 100));
   AddInput(kColorInput, NodeValue::kColor, QVariant::fromValue(Color(1.0, 0.0, 0.0, 1.0)));
 }

app/shaders/shape.frag

@@ -12,7 +12,9 @@ uniform vec2 resolution_in;
 uniform vec4 color_in;
 
 void main() {
-  vec2 real_position = pos_in/resolution_in;
+  vec2 p = pos_in + resolution_in*0.5 - size_in*0.5;
+
+  vec2 real_position = p/resolution_in;
   vec2 real_size = size_in/resolution_in;
 
   vec4 col = vec4(0.0);
@@ -23,7 +25,7 @@ void main() {
       col = color_in;
     }
   } else if (type_in == SHAPE_ELLIPSE) {
-    vec2 center = pos_in+size_in*0.5;
+    vec2 center = p+size_in*0.5;
     float radius = size_in.y*0.5;
     float aspect_ratio = size_in.x/size_in.y;