From 0963aea5052ae8d4905cf0abb51dfe601c12b7e6 Mon Sep 17 00:00:00 2001
From: Jovansonlee Cesar <ivanceras@gmail.com>
Date: Tue, 6 Jul 2021 07:11:04 +0800
Subject: Include circle in intersection test

---
 svgbob/src/buffer/cell_buffer.rs                     |  4 +---
 svgbob/src/buffer/fragment_buffer/fragment.rs        | 14 +++++++++++++-
 svgbob/src/buffer/fragment_buffer/fragment/circle.rs | 19 +++++++++++++++++++
 svgbob/src/buffer/fragment_buffer/fragment/rect.rs   |  1 +
 4 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/svgbob/src/buffer/cell_buffer.rs b/svgbob/src/buffer/cell_buffer.rs
index dfaae2d..47b8352 100644
--- a/svgbob/src/buffer/cell_buffer.rs
+++ b/svgbob/src/buffer/cell_buffer.rs
@@ -195,9 +195,6 @@ impl CellBuffer {
     /// return fragments that are Rect, Circle,
     pub fn get_shapes_fragment(&self, settings: &Settings) -> Vec<Fragment> {
         let (single_member, _, endorsed_fragments) = self.group_single_members_from_other_fragments(settings);
-        dbg!(&single_member);
-        dbg!(&endorsed_fragments);
-
         endorsed_fragments.into_iter().chain(single_member.into_iter()
             .filter(|frag|frag.is_rect() || frag.is_circle())
         ).collect()
@@ -244,6 +241,7 @@ impl CellBuffer {
     }
 
     /// group nodes that can be group and the rest will be fragments
+    /// Note: The grouped fragments is scaled here
     fn group_nodes_and_fragments<MSG>(
         &self,
         settings: &Settings,
diff --git a/svgbob/src/buffer/fragment_buffer/fragment.rs b/svgbob/src/buffer/fragment_buffer/fragment.rs
index f938b04..8eeacac 100644
--- a/svgbob/src/buffer/fragment_buffer/fragment.rs
+++ b/svgbob/src/buffer/fragment_buffer/fragment.rs
@@ -297,7 +297,7 @@ impl Fragment {
     }
 
     /// check if this fragment is intersecting with this bounding box
-    fn is_intersecting(&self, bbox: AABB<f32>) -> bool {
+    pub fn is_intersecting(&self, bbox: AABB<f32>) -> bool {
         let bbox: Polyline<f32> = Polyline::new(
             vec![
                 *bbox.mins(),
@@ -319,6 +319,11 @@ impl Fragment {
                 proximity(&identity, &polyline, &identity, &bbox, 0.0)
                     == Proximity::Intersecting
             }
+            Fragment::Circle(circle) => {
+                let polyline: Polyline<f32> = circle.clone().into();
+                proximity(&identity, &polyline, &identity, &bbox, 0.0)
+                    == Proximity::Intersecting
+            }
             _ => false,
         }
     }
@@ -414,6 +419,13 @@ impl Fragment {
         }
     }
 
+    pub fn as_rect(&self) -> Option<&Rect> {
+        match self {
+            Fragment::Rect(ref rect) => Some(rect),
+            _ => None,
+        }
+    }
+
     pub fn as_polygon(&self) -> Option<&Polygon> {
         match self {
             Fragment::Polygon(polygon) => Some(polygon),
diff --git a/svgbob/src/buffer/fragment_buffer/fragment/circle.rs b/svgbob/src/buffer/fragment_buffer/fragment/circle.rs
index e3f9717..f43428a 100644
--- a/svgbob/src/buffer/fragment_buffer/fragment/circle.rs
+++ b/svgbob/src/buffer/fragment_buffer/fragment/circle.rs
@@ -1,4 +1,6 @@
 use crate::{fragment::Bounds, util, Cell, Point};
+use ncollide2d::procedural;
+use ncollide2d::shape::Polyline;
 use std::{cmp::Ordering, fmt};
 
 use sauron::{
@@ -104,3 +106,20 @@ impl PartialEq for Circle {
         self.cmp(other) == Ordering::Equal
     }
 }
+
+impl Into<Polyline<f32>> for Circle {
+    fn into(self) -> Polyline<f32> {
+        use nalgebra::Point2;
+        let pl = procedural::circle(&(self.radius * 2.0), 64);
+        let mut points = pl.coords().to_vec();
+        let orig_len = points.len();
+        points.dedup();
+
+        let adjusted: Vec<Point2<f32>> = points
+            .into_iter()
+            .map(|p| *Point::new(p.x + self.center.x, p.y + self.center.y))
+            .collect();
+
+        Polyline::new(adjusted, None)
+    }
+}
diff --git a/svgbob/src/buffer/fragment_buffer/fragment/rect.rs b/svgbob/src/buffer/fragment_buffer/fragment/rect.rs
index 0bcad5c..51f8481 100644
--- a/svgbob/src/buffer/fragment_buffer/fragment/rect.rs
+++ b/svgbob/src/buffer/fragment_buffer/fragment/rect.rs
@@ -120,6 +120,7 @@ impl Into<Polyline<f32>> for Rect {
                 *Point::new(self.end.x, self.start.y),
                 *self.end,
                 *Point::new(self.start.x, self.end.y),
+                *self.start,
             ],
             None,
         )
-- 
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