First public release of Rapier.

src_testbed/objects/polyline.rs

@@ -0,0 +1,79 @@
+use kiss3d::window::Window;
+use na::{Isometry2, Point2, Point3};
+use ncollide2d::shape;
+use nphysics2d::object::{ColliderAnchor, DefaultColliderHandle, DefaultColliderSet};
+
+pub struct Polyline {
+    color: Point3<f32>,
+    base_color: Point3<f32>,
+    vertices: Vec<Point2<f32>>,
+    indices: Vec<Point2<usize>>,
+    collider: DefaultColliderHandle,
+    pos: Isometry2<f32>,
+}
+
+impl Polyline {
+    pub fn new(
+        collider: DefaultColliderHandle,
+        colliders: &DefaultColliderSet<f32>,
+        _: Isometry2<f32>,
+        vertices: Vec<Point2<f32>>,
+        indices: Vec<Point2<usize>>,
+        color: Point3<f32>,
+        _: &mut Window,
+    ) -> Polyline {
+        let mut res = Polyline {
+            color,
+            pos: Isometry2::identity(),
+            base_color: color,
+            vertices,
+            indices,
+            collider,
+        };
+
+        res.update(colliders);
+        res
+    }
+
+    pub fn select(&mut self) {
+        self.color = Point3::new(1.0, 0.0, 0.0);
+    }
+
+    pub fn unselect(&mut self) {
+        self.color = self.base_color;
+    }
+
+    pub fn set_color(&mut self, color: Point3<f32>) {
+        self.color = color;
+        self.base_color = color;
+    }
+
+    pub fn update(&mut self, colliders: &DefaultColliderSet<f32>) {
+        // Update if some deformation occurred.
+        // FIXME: don't update if it did not move.
+        if let Some(c) = colliders.get(self.collider) {
+            self.pos = *c.position();
+            if let ColliderAnchor::OnDeformableBody { .. } = c.anchor() {
+                let shape = c.shape().as_shape::<shape::Polyline<f32>>().unwrap();
+                self.vertices = shape.points().to_vec();
+                self.indices.clear();
+
+                for e in shape.edges() {
+                    self.indices.push(e.indices);
+                }
+            }
+        }
+    }
+
+    pub fn object(&self) -> DefaultColliderHandle {
+        self.collider
+    }
+
+    pub fn draw(&mut self, window: &mut Window) {
+        for idx in &self.indices {
+            let p1 = self.pos * self.vertices[idx.x];
+            let p2 = self.pos * self.vertices[idx.y];
+            window.draw_planar_line(&p1, &p2, &self.color)
+        }
+    }
+}