Move 2D benchmarks into their own directory/crate.

benchmarks2d/pyramid2.rs

@@ -0,0 +1,60 @@
+use na::Point2;
+use rapier2d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
+use rapier2d::geometry::{ColliderBuilder, ColliderSet};
+use rapier_testbed2d::Testbed;
+
+pub fn init_world(testbed: &mut Testbed) {
+    /*
+     * World
+     */
+    let mut bodies = RigidBodySet::new();
+    let mut colliders = ColliderSet::new();
+    let joints = JointSet::new();
+
+    /*
+     * Ground
+     */
+    let ground_size = 100.0;
+    let ground_thickness = 1.0;
+
+    let rigid_body = RigidBodyBuilder::new_static().build();
+    let ground_handle = bodies.insert(rigid_body);
+    let collider = ColliderBuilder::cuboid(ground_size, ground_thickness).build();
+    colliders.insert(collider, ground_handle, &mut bodies);
+
+    /*
+     * Create the cubes
+     */
+    let num = 100;
+    let rad = 0.5;
+
+    let shift = rad * 2.0;
+    let centerx = shift * (num as f32) / 2.0;
+    let centery = shift / 2.0 + ground_thickness + rad * 1.5;
+
+    for i in 0usize..num {
+        for j in i..num {
+            let fj = j as f32;
+            let fi = i as f32;
+            let x = (fi * shift / 2.0) + (fj - fi) * shift - centerx;
+            let y = fi * shift + centery;
+
+            // Build the rigid body.
+            let rigid_body = RigidBodyBuilder::new_dynamic().translation(x, y).build();
+            let handle = bodies.insert(rigid_body);
+            let collider = ColliderBuilder::cuboid(rad, rad).build();
+            colliders.insert(collider, handle, &mut bodies);
+        }
+    }
+
+    /*
+     * Set up the testbed.
+     */
+    testbed.set_world(bodies, colliders, joints);
+    testbed.look_at(Point2::new(0.0, 2.5), 5.0);
+}
+
+fn main() {
+    let testbed = Testbed::from_builders(0, vec![("Balls", init_world)]);
+    testbed.run()
+}