From ebd7419c8e276d32a533c64786e1830896934edc Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tomas=20Wenstr=C3=B6m?= <tomas.wenstrom@gmail.com>
Date: Thu, 11 Mar 2021 19:39:21 +0100
Subject: [PATCH] demo

---
 src/core/level/mod.rs        |  4 +++
 src/core/object/character.rs | 74 ++++++++++++++++++++++++++++++++++++++------
 2 files changed, 69 insertions(+), 9 deletions(-)

diff --git a/src/core/level/mod.rs b/src/core/level/mod.rs
index 47a4703..1d8c73a 100644
--- a/src/core/level/mod.rs
+++ b/src/core/level/mod.rs
@@ -292,6 +292,10 @@ impl Wall {
 	self.edge.angle()
     }
 
+    pub fn length(&self) -> f64 {
+	(self.edge.p1 - self.edge.p2).length()
+    }
+
     pub fn from_2d(&self, pos: &Point<f64>, vel: &Point<f64>) -> (f64, f64) {
 	let pos = self.projection_of(*pos - self.edge.p1);
 	let vel = self.projection_of(*vel);
diff --git a/src/core/object/character.rs b/src/core/object/character.rs
index b2ec5cf..bf79700 100644
--- a/src/core/object/character.rs
+++ b/src/core/object/character.rs
@@ -169,17 +169,73 @@ impl State for StandState {
 
     fn update(&mut self, body: &mut Body, _ctrl: &Controller, _objects: &mut Objects, _lvl: &Level, _dt: Duration) -> Option<Box<dyn State>> {
 	if let Some(wall) = &body.standing_on {
+	    body.vel += _ctrl.mov.to_point() * 0.2;
 	    let (mut pos, mut vel) = wall.from_2d(&body.pos, &body.vel);
-	    vel *= 0.9;
+	    vel *= 0.99;
 	    pos += vel;
-	    let (p, v) = wall.to_2d(pos, vel);
-	    body.pos = p;
-	    body.vel = v;
+	    if pos < 0.0 {
+		let w = wall.previous();
+		pos += w.length();
+		let (p, v) = w.to_2d(pos, vel);
+		body.pos = p;
+		body.vel = v;
+		body.standing_on = Some(w);
+	    } else if pos > wall.length() {
+		let w = wall.next();
+		pos -= wall.length();
+		let (p, v) = w.to_2d(pos, vel);
+		body.pos = p;
+		body.vel = v;
+		body.standing_on = Some(w);
+	    } else {
+		let (p, v) = wall.to_2d(pos, vel);
+		body.pos = p;
+		body.vel = v;
+	    }
 	}
 
 	None
     }
 }
+
+////////// WALKING /////////////////////////////////////////////////////////////
+
+struct WalkTrigger;
+
+impl Trigger for WalkTrigger {
+    fn update(&mut self, body: &Body, ctrl: &Controller, _dt: Duration) -> Option<Box<dyn State>> {
+	if body.standing_on.is_some() && (ctrl.mov.x < -0.1 || ctrl.mov.x > 0.1) {
+	    Some(Box::new(WalkState))
+	} else {
+	    None
+	}
+    }
+}
+
+struct WalkState;
+
+impl State for WalkState {
+    fn enter(&mut self, body: &mut Body, ctrl: &Controller, _objects: &mut Objects) {
+	if let Some(wall) = &body.standing_on {
+	    if ctrl.mov.to_point().length() < 0.1 {
+		body.vel = wall.normal().into();
+	    } else {
+		body.vel = ctrl.mov.to_point();
+	    }
+	    body.vel *= 5.0;
+	    body.pos += body.vel * 0.1;
+	    body.standing_on = None;
+	}
+    }
+
+    fn update(&mut self, body: &mut Body, ctrl: &Controller, _objects: &mut Objects, lvl: &Level, _dt: Duration) -> Option<Box<dyn State>> {
+	body.vel += lvl.gravity;
+	body.pos += body.vel;
+
+	match ctrl.mov.x {
+	    v if v < -0.9 && body.vel.x > -5.0 => { body.vel.x -= 0.5 }
+	    v if v > 0.9 && body.vel.x < 5.0 => { body.vel.x += 0.5 }
+	    _ => {}
 	}
 
 	None
@@ -205,12 +261,12 @@ struct JumpState;
 impl State for JumpState {
     fn enter(&mut self, body: &mut Body, ctrl: &Controller, _objects: &mut Objects) {
 	if let Some(wall) = &body.standing_on {
-	    if ctrl.mov.to_point().length() < 0.1 {
-		body.vel = wall.normal().into();
+	    let direction = if ctrl.mov.to_point().length() < 0.1 {
+		wall.normal().into()
 	    } else {
-		body.vel = ctrl.mov.to_point();
-	    }
-	    body.vel *= 5.0;
+		ctrl.mov.to_point()
+	    };
+	    body.vel += direction * 5.0;
 	    body.pos += body.vel * 0.1;
 	    body.standing_on = None;
 	}
-- 
2.11.0