Overworld Movement #9
5 changed files with 266 additions and 35 deletions
1
Cargo.lock
generated
1
Cargo.lock
generated
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@ -2129,7 +2129,6 @@ version = "0.1.0"
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dependencies = [
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"comfy",
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"heck",
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"log",
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"resvg",
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]
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@ -16,7 +16,6 @@ opt-level = 3
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[dependencies]
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comfy = { version = "0.4.0", features = ["wayland"] }
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log = "0.4.22"
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[build-dependencies]
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heck = "0.5"
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@ -1,9 +1,10 @@
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use crate::{game::ZLayer, State};
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use comfy::{
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draw_rect_outline, draw_sprite, main_camera_mut, EngineContext, IVec2, Vec2, RED,
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WHITE
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draw_circle, draw_rect_outline, draw_sprite, error, info, is_key_down,
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main_camera_mut, EngineContext, IVec2, KeyCode, Vec2, RED, WHITE
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};
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use crate::game::ZLayer;
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use std::time::Instant;
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use worldgen::MovementCost;
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pub mod worldgen;
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@ -21,11 +22,158 @@ pub fn draw(state: &crate::State, _engine: &comfy::EngineContext<'_>) {
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draw_rect_outline(coords.as_vec2(), Vec2::ONE, 0.1, RED, 10);
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}
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}
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draw_circle(state.ghost.overworld_pos, 0.5, RED, ZLayer::Ghost.into());
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}
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pub fn update(state: &mut crate::State, _engine: &mut EngineContext<'_>) {
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fn update_move_player(state: &mut State) {
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let now = Instant::now();
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// Are there any pending position updates? If so, we ignore all user input and execute
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// the pending updates.
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if state.ghost.overworld_movement_pending != Vec2::ZERO {
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info!(
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"Pending Movement: {:?}",
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state.ghost.overworld_movement_pending
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);
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state.ghost.update_overworld_pos(now);
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return;
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}
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// Otherwise, we check for user inputs, and update the pending movement accordingly.
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let tile_pos = IVec2 {
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x: state.ghost.overworld_pos.x.round() as _,
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y: state.ghost.overworld_pos.y.round() as _
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};
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let Some(tile) = state.overworld.get_tile(tile_pos).copied() else {
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error!("How can we be standing inside a non-generated tile?");
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return;
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};
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let mut requested_pos = None;
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let mut requested_pos_diff = None;
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let mut requested_cost_curr = None;
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let mut requested_cost_new = None;
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if is_key_down(KeyCode::Up) {
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let diff = IVec2 { x: 0, y: 1 };
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let new_pos = tile_pos + diff;
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let new_tile = state.overworld.get_or_generate_tile(new_pos);
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if new_tile.can_stand_inside() {
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requested_pos = Some(new_pos);
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requested_pos_diff = Some(diff);
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requested_cost_curr = Some(tile.movement_cost_up());
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requested_cost_new = Some(new_tile.movement_cost_down());
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} else {
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info!("Rejecting movement - cannot stand in the requested tile.");
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}
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}
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if is_key_down(KeyCode::Down) {
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let diff = IVec2 { x: 0, y: -1 };
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let new_pos = tile_pos + diff;
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let new_tile = state.overworld.get_or_generate_tile(new_pos);
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if new_tile.can_stand_inside() {
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requested_pos = Some(new_pos);
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requested_pos_diff = Some(diff);
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requested_cost_curr = Some(tile.movement_cost_down());
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requested_cost_new = Some(new_tile.movement_cost_up());
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} else {
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info!("Rejecting movement - cannot stand in the requested tile.");
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}
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}
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if is_key_down(KeyCode::Left) {
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let diff = IVec2 { x: -1, y: 0 };
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let new_pos = tile_pos + diff;
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let new_tile = state.overworld.get_or_generate_tile(new_pos);
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if new_tile.can_stand_inside() {
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requested_pos = Some(new_pos);
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requested_pos_diff = Some(diff);
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requested_cost_curr = Some(tile.movement_cost_left());
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requested_cost_new = Some(new_tile.movement_cost_right());
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} else {
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info!("Rejecting movement - cannot stand in the requested tile.");
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}
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}
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if is_key_down(KeyCode::Right) {
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let diff = IVec2 { x: 1, y: 0 };
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let new_pos = tile_pos + diff;
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let new_tile = state.overworld.get_or_generate_tile(new_pos);
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if new_tile.can_stand_inside() {
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requested_pos = Some(new_pos);
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requested_pos_diff = Some(diff);
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requested_cost_curr = Some(tile.movement_cost_right());
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requested_cost_new = Some(new_tile.movement_cost_left());
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} else {
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info!("Rejecting movement - cannot stand in the requested tile.");
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}
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}
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// only continue if some movement was requested
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let Some(_requested_pos) = requested_pos else {
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return;
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};
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let Some(requested_pos_diff) = requested_pos_diff else {
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return;
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};
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let Some(requested_cost_curr) = requested_cost_curr else {
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return;
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};
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let Some(requested_cost_new) = requested_cost_new else {
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return;
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};
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state.ghost.overworld_movement_speed = match (requested_cost_curr, requested_cost_new)
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{
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// movement in this direction not possible
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(MovementCost::Infinite, _) | (_, MovementCost::Infinite) => {
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info!("Rejecting movement - movement cost is infinite");
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return;
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},
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// we are walking on a path
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(MovementCost::Path, MovementCost::Path) => 10.0,
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// we are walking across an obstacle
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(MovementCost::Obstacle, _) | (_, MovementCost::Obstacle) => 1.0,
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// we are walking on grass
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_ => 5.0
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};
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state.ghost.overworld_movement_pending = Vec2 {
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x: requested_pos_diff.x as _,
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y: requested_pos_diff.y as _
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};
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state.ghost.overworld_pos_last_update = now;
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}
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pub fn update(state: &mut State, _ctx: &mut EngineContext<'_>) {
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let mut camera = main_camera_mut();
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camera.center = Vec2::ZERO;
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camera.zoom = 30.0;
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state.overworld.get_or_generate_tile(IVec2::ZERO);
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// move player
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update_move_player(state);
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// generate more chunks if needed
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{
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let half_viewport = (camera.world_viewport() * 0.5 + 3.0).as_ivec2();
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let rounded_ghost_pos = IVec2 {
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x: state.ghost.overworld_pos.x.round() as _,
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y: state.ghost.overworld_pos.y.round() as _
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};
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state.overworld.get_or_generate_tile(
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rounded_ghost_pos + IVec2::new(half_viewport.x, half_viewport.y)
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);
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state.overworld.get_or_generate_tile(
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rounded_ghost_pos + IVec2::new(half_viewport.x, -half_viewport.y)
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);
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state.overworld.get_or_generate_tile(
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rounded_ghost_pos + IVec2::new(-half_viewport.x, half_viewport.y)
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);
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state.overworld.get_or_generate_tile(
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rounded_ghost_pos + IVec2::new(-half_viewport.x, -half_viewport.y)
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);
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}
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}
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@ -2,8 +2,7 @@
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#![allow(dead_code)]
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use crate::assets::ASSETS;
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use comfy::{IVec2, TextureHandle, UVec2};
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use log::info;
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use comfy::{info, IVec2, TextureHandle, UVec2};
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use std::collections::HashMap;
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pub enum MovementCost {
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@ -117,28 +116,61 @@ impl Tile {
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}
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pub fn can_stand_inside(&self) -> bool {
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unimplemented!()
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#[allow(clippy::match_like_matches_macro)] // I believe this is better readable
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match self {
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Self::House { door: false, .. } => false,
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_ => true
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}
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}
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pub fn movement_cost_left(&self) -> MovementCost {
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unimplemented!()
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match self {
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Self::Grass => MovementCost::Default,
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Self::Path { left: true, .. } => MovementCost::Path,
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Self::Path { left: false, .. } => MovementCost::Default,
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Self::Fence { left: false, .. } => MovementCost::Obstacle,
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_ => MovementCost::Infinite
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}
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}
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pub fn movement_cost_right(&self) -> MovementCost {
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unimplemented!()
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match self {
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Self::Grass => MovementCost::Default,
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Self::Path { right: true, .. } => MovementCost::Path,
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Self::Path { right: false, .. } => MovementCost::Default,
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Self::Fence { right: false, .. } => MovementCost::Obstacle,
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_ => MovementCost::Infinite
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}
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}
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pub fn movement_cost_up(&self) -> MovementCost {
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unimplemented!()
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match self {
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Self::Grass => MovementCost::Default,
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Self::Path { top: true, .. } => MovementCost::Path,
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Self::Path { top: false, .. } => MovementCost::Default,
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Self::Fence { top: false, .. } => MovementCost::Obstacle,
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_ => MovementCost::Infinite
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}
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}
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pub fn movement_cost_down(&self) -> MovementCost {
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unimplemented!()
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match self {
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Self::Grass => MovementCost::Default,
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Self::Path { bottom: true, .. } => MovementCost::Path,
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Self::Path { bottom: false, .. } => MovementCost::Default,
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Self::Fence { bottom: false, .. } => MovementCost::Obstacle,
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Self::House { door: true, .. } => MovementCost::Path,
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_ => MovementCost::Infinite
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}
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}
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pub fn can_enter_house(&self) -> bool {
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unimplemented!()
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#[allow(clippy::match_like_matches_macro)] // I believe this is better readable
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match self {
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Self::House { door: true, .. } => true,
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_ => false
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}
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}
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}
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/// The size of a chunk (both width and height). This value squared gives the amount of
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/// tiles in the chunk.
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const CHUNK_SIZE: u32 = 100;
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const CHUNK_SIZE: u32 = 50;
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/// Chunks
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#[derive(Debug)]
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@ -286,7 +318,10 @@ impl Chunk {
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fence_vert,
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grass,
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house(ASSETS.overworld.house_bottom_left),
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house(ASSETS.overworld.house_bottom_door),
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Tile::House {
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door: true,
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texture: ASSETS.overworld.house_bottom_door
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},
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house(ASSETS.overworld.house_bottom_window),
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house(ASSETS.overworld.house_bottom_window),
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house(ASSETS.overworld.house_bottom_right),
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@ -403,7 +438,15 @@ fn world_to_chunk_and_local_coords(world_coords: IVec2) -> (IVec2, UVec2) {
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}
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impl Overworld {
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fn get_tile(&self, world_coords: IVec2) -> Option<&Tile> {
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/// Return a [`Tile`] at the given world coordinates, or `None` if that tile has not
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/// been generated yet. Uses engine/world cordinates.
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pub fn get_tile(&self, world_coords: IVec2) -> Option<&Tile> {
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let mut coords = world_coords;
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coords.y *= -1;
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self.get_tile_private(coords)
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}
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fn get_tile_private(&self, world_coords: IVec2) -> Option<&Tile> {
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let (chunk_coords, local_chunk_coords) =
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world_to_chunk_and_local_coords(world_coords);
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@ -411,15 +454,15 @@ impl Overworld {
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chunk.get_tile(local_chunk_coords)
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}
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/// Return a [`Tile`] at the given world coordinates, or `None` if that tile has not
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/// been generated yet. use engine/world cordinates.
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/// Return a [`Tile`] at the given world coordinates. Generates tiles if necessary.
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/// Uses engine/world cordinates.
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pub fn get_or_generate_tile(&mut self, world_coords: IVec2) -> &Tile {
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let mut coords = world_coords;
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coords.y *= -1;
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self.get_or_generate_tiles_private(coords)
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self.get_or_generate_tile_private(coords)
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}
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fn get_or_generate_tiles_private(&mut self, world_coords: IVec2) -> &Tile {
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fn get_or_generate_tile_private(&mut self, world_coords: IVec2) -> &Tile {
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let (chunk_coords, local_chunk_coords) =
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world_to_chunk_and_local_coords(world_coords);
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@ -430,21 +473,21 @@ impl Overworld {
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chunk.get_tile(local_chunk_coords).unwrap()
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}
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/// Iterate over all generated tiles and its engine/world cordinates. using a [`Tile`] at the given world coordinates, or `None` if that tile has not
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/// been generated yet.
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/// Iterate over all generated tiles in all generated chunks and their engine/world
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/// cordinates.
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pub fn iter_tiles(&self) -> impl Iterator<Item = (IVec2, &Tile)> {
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self.iter_tilese_private().map(|(coords, tile)| {
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self.iter_tiles_private().map(|(coords, tile)| {
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let mut w_coords = coords;
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w_coords.y *= -1;
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(w_coords, tile)
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})
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}
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/// iterate over all tiles and its global coords
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fn iter_tilese_private(&self) -> impl Iterator<Item = (IVec2, &Tile)> {
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/// Iterate over all generated tiles in all generated chunks.
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fn iter_tiles_private(&self) -> impl Iterator<Item = (IVec2, &Tile)> {
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self.chunks.iter().flat_map(|(chunk_coords, chunk)| {
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chunk.iter_tiles().map(|(local_coords, tile)| {
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// never fail because chunksize fits alswas into i32
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// never fail because chunksize fits always into i32
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let local_coords: IVec2 = local_coords.try_into().unwrap();
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(local_coords + (*chunk_coords * CHUNK_SIZE as i32), tile)
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})
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54
src/game.rs
54
src/game.rs
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@ -2,22 +2,64 @@ use crate::{
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activities::{house, overworld, Activity},
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State
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};
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use comfy::EngineContext;
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use std::ops::Sub;
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use comfy::{EngineContext, Vec2};
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use std::{ops::Sub, time::Instant};
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#[derive(Debug)]
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pub struct Ghost {
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/// current electric charge of the Ghost
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/// Current electric charge of the Ghost.
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pub charge: f32,
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/// max electric charge of the Ghost
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pub max_charge: f32
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/// Max electric charge of the Ghost.
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pub max_charge: f32,
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/// The position of the ghost in the overworld. Expressed in tile coordinates, but
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/// as a float as a ghost takes more than one tick to move.
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pub overworld_pos: Vec2,
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/// Pending movement of the ghost in the overworld.
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pub overworld_movement_pending: Vec2,
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/// The current movement speed of the ghost in tiles/sec.
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pub overworld_movement_speed: f32,
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/// The timestamp of the last overworld position update.
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pub overworld_pos_last_update: Instant
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}
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impl Ghost {
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pub fn update_overworld_pos(&mut self, now: Instant) {
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// This calculation is extremely simplistic. It will not work properly if both
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// x and y of movement_pending are non-zero. But we only move left,right,up,down
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// so that should never happen!
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let secs = now
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.duration_since(self.overworld_pos_last_update)
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.as_secs_f32();
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let mut movement = self.overworld_movement_pending.signum()
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* self.overworld_movement_speed
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* secs;
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// limit the movement to the remaining movement
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if self.overworld_movement_pending.x.abs() < movement.x.abs() {
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movement.x = self.overworld_movement_pending.x;
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}
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if self.overworld_movement_pending.y.abs() < movement.y.abs() {
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movement.y = self.overworld_movement_pending.y;
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}
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// execute the movement
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self.overworld_pos += movement;
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self.overworld_movement_pending -= movement;
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self.overworld_pos_last_update = now;
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}
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}
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impl Default for Ghost {
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fn default() -> Self {
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Self {
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charge: 1000.0,
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max_charge: 1000.0
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max_charge: 1000.0,
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overworld_pos: Vec2::ZERO,
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overworld_movement_pending: Vec2::ZERO,
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overworld_movement_speed: 0.0,
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overworld_pos_last_update: Instant::now()
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}
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}
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}
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