init

src/systems.rs

@@ -0,0 +1,62 @@
+use amethyst::{
+    core::SystemDesc,
+    core::timing::Time,
+    core::transform::{Transform, TransformBundle},
+    derive::SystemDesc,
+    ecs::prelude::{},
+    ecs::prelude::{
+        Component, DenseVecStorage, Entity, Join, Read,
+        ReadStorage, System, SystemData, WriteStorage
+    },
+    input::{InputHandler, StringBindings},
+};
+
+use log::info;
+use crate::components::*;
+
+pub struct ScrollScrollables;
+
+// This system iterates all the objects with transform (and falling object) component
+impl<'a> System<'a> for ScrollScrollables {
+    type SystemData = (
+        WriteStorage<'a, Transform>,
+        WriteStorage<'a, TiledScroller>,
+        Read<'a, Time>,
+    );
+
+    fn run(&mut self, (mut transforms, mut scrolling, time): Self::SystemData) {
+        for (mut transform, mut object) in (&mut transforms, &mut scrolling).join() {
+
+            // I need to tile it by it's width
+            transform.prepend_translation_x(object.speed * time.delta_seconds());
+            if transform.translation().x+144.0*1.5 < 0.0 {
+                transform.set_translation_x(144.0*3.0/2.0*3.0);
+            }
+        }
+    }
+}
+
+pub struct BirbGravity {
+    pub fired: bool,
+}
+
+// This system iterates all the objects with transform (and falling object) component
+impl<'a> System<'a> for BirbGravity {
+    type SystemData = (
+        WriteStorage<'a, Transform>,
+        WriteStorage<'a, Birb>,
+        Read<'a, Time>,
+        Read<'a, InputHandler<StringBindings>>,
+    );
+
+    fn run(&mut self, (mut transforms, mut scrolling, time, input): Self::SystemData) {
+        for (mut transform, mut object) in (&mut transforms, &mut scrolling).join() {
+
+            if input.action_is_down("flap").expect("No action") {
+                object.vertical_speed = 500.0;
+            }
+            object.vertical_speed -= 1000.0 * time.delta_seconds();
+            transform.prepend_translation_y(object.vertical_speed * time.delta_seconds());
+        }
+    }
+}