From 15b4ade5a357a791cf3ffa86cfe78b5f7ae270c9 Mon Sep 17 00:00:00 2001
From: tom barrett <spalf0@gmail.com>
Date: Mon, 24 Jun 2019 09:31:24 -0500
Subject: now draws accurately depending on flip

---
 src/state.rs |  5 ++---
 src/tile.rs  | 38 ++++++++++++++++++++++++--------------
 2 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/src/state.rs b/src/state.rs
index 20066a8..b06d535 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -1,5 +1,5 @@
 use ggez::event::{EventHandler, KeyCode, KeyMods};
-use ggez::graphics::{self, spritebatch::SpriteBatch, DrawParam, FilterMode, Image};
+use ggez::graphics::{self, spritebatch::SpriteBatch, DrawParam, FilterMode, Image, WrapMode};
 use ggez::{filesystem, Context, GameResult};
 
 use crate::camera::Camera;
@@ -9,7 +9,6 @@ use crate::tileset::Tileset;
 
 pub struct State {
     map: Map,
-    //tileset: Tileset,
     spritebatch: SpriteBatch,
     camera: Camera,
     player: Player,
@@ -19,6 +18,7 @@ impl State {
     pub fn new(context: &mut Context) -> GameResult<State> {
         let mut image = Image::new(context, "/tileset.png")?;
         image.set_filter(FilterMode::Nearest);
+        image.set_wrap(WrapMode::Mirror, WrapMode::Mirror);
 
         let tileset = Tileset::new(filesystem::open(context, "/tileset.tsx")?);
 
@@ -27,7 +27,6 @@ impl State {
 
         Ok(State {
             map,
-            //    tileset,
             spritebatch: SpriteBatch::new(image),
             camera: Camera::new(context, map_dimensions),
             player: Player::new(map_dimensions),
diff --git a/src/tile.rs b/src/tile.rs
index 21b6a79..5667b92 100644
--- a/src/tile.rs
+++ b/src/tile.rs
@@ -6,32 +6,36 @@ use crate::math::convert_angle_to_rad;
 use crate::tileset::Tileset;
 
 pub struct Tile {
-    //id: u32,
     source: Rect,
     //animation: Option<Vec<(u32, Rect)>>,
-    rotate: f32,
     destination: Point2<f32>,
+    rotation: f32,
 }
 
 impl Tile {
     pub fn new(text: &str, i: usize, tileset: &Tileset, width: usize, height: usize) -> Tile {
         let id = text.parse::<usize>().unwrap();
 
-        //let flip_d = (id & constants::FLIP_DIAGONAL_FLAG) == constants::FLIP_DIAGONAL_FLAG;
+        let flip_d = (id & constants::FLIP_DIAGONAL_FLAG) == constants::FLIP_DIAGONAL_FLAG;
         let flip_h = (id & constants::FLIP_HORIZONTAL_FLAG) == constants::FLIP_HORIZONTAL_FLAG;
         let flip_v = (id & constants::FLIP_VERTICAL_FLAG) == constants::FLIP_VERTICAL_FLAG;
 
-        let id = if flip_h | flip_v {
+        let id = if flip_h | flip_v | flip_d {
             id & !constants::ALL_FLIP_FLAGS
         } else {
             id
         };
 
-        let rotate = match (flip_h, flip_v) {
-            (true, false) => convert_angle_to_rad(90.0),
-            (true, true) => convert_angle_to_rad(180.0),
-            (false, true) => convert_angle_to_rad(270.0),
-            (false, false) => 0.0,
+        let (source, rotation) = match (flip_d, flip_h, flip_v) {
+            (true, true, true) => (Tile::flip(tileset.tiles[id]), convert_angle_to_rad(90.0)),
+            (true, true, false) => (tileset.tiles[id], convert_angle_to_rad(90.0)),
+            (true, false, true) => (tileset.tiles[id], convert_angle_to_rad(270.0)),
+            //(true, false, false) => (),
+            (false, true, true) => (tileset.tiles[id], convert_angle_to_rad(180.0)),
+            (false, true, false) => (Tile::flip(tileset.tiles[id]), 0.0),
+            //(false, false, true) => (),
+            //(false, false, false) => (),
+            _ => (tileset.tiles[id], 0.0),
         };
 
         let x = i as f32 % width as f32;
@@ -44,20 +48,26 @@ impl Tile {
         );
 
         Tile {
-            //id,
-            source: tileset.tiles[id as usize],
+            source,
             //animation: None,
-            rotate,
             destination,
+            rotation,
         }
     }
 
+    fn flip(rect: Rect) -> Rect {
+        let mut r = rect;
+        r.x *= -1.0;
+        r.x -= rect.w;
+        r
+    }
+
     pub fn draw(&self, spritebatch: &mut SpriteBatch) {
         let draw_param = DrawParam::default()
             .src(self.source)
-            .rotation(self.rotate)
-            .offset(Point2::new(0.5, 0.5))
             .dest(self.destination)
+            .offset(Point2::new(0.5, 0.5))
+            .rotation(self.rotation)
             .scale(Vector2::new(constants::TILE_SCALE, constants::TILE_SCALE));
 
         spritebatch.add(draw_param);
-- 
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