Try 3d still shitty

physics.jai

@@ -159,10 +159,12 @@ handle_collision :: (m: Manifold, dt: float) {
         r2 := m.contact_points[it] - b.pos;
         I1 := moment_of_inertia(a);
         I2 := moment_of_inertia(b);
-        impulse_strength += (-(1.0 + restitution) * dot(vr, m.normal)) / ( 1.0/a.mass + 1.0/b.mass + dot(cross(cross(r1, m.normal)/I1, r1) + cross(cross(r2, m.normal), r2)/I2, m.normal));
+        make3d :: (v2: Vector2) -> Vector3 { return .{v2.x, v2.y, 0.0}; }
+        make2d :: (v3: Vector3) -> Vector2 { return .{v3.x, v3.y}; }
+        cross_products: Vector2 = make2d(cross(cross(make3d(r1), make3d(m.normal))/I1, make3d(r1))) + make2d(cross(cross(make3d(r2), make3d(m.normal)), make3d(r2)))/I2;
+        divisor: float = 1.0/a.mass + 1.0/b.mass + dot(cross_products, m.normal);
 
-        // the momentum would be unused if put into static
+        impulse_strength += (-(1.0 + restitution) * dot(vr, m.normal)) / divisor;
-        if a.static || b.static impulse_strength *= 2.0;
 
         impulse := m.normal * impulse_strength;
         apply_impulse_at_point(b,  impulse, m.contact_points[it]);
@@ -535,8 +537,8 @@ main :: () {
     Simp.set_render_target(window);
 
     rects: [..]Rect;
-    array_add(*rects, .{pos = #run xy(0.0,  0.0), halfsize = #run xy(0.3)});
+    //array_add(*rects, .{pos = #run xy(0.0,  0.0), halfsize = #run xy(0.3)});
-    //array_add(*rects, .{pos = #run xy(2.5, 0.0), halfsize = #run xy(0.3)});
+    array_add(*rects, .{pos = #run xy(2.5, 0.0), halfsize = #run xy(0.3)});
     //array_add(*rects, .{pos = #run xy(-2.5, 0.0), halfsize = #run xy(0.3)});
     array_add(*rects, .{pos = #run xy(0.0, -3.0), halfsize = #run xy(3.0, 0.2), static = true});