From f2545d27e94437a02dab77fa0c978260962bb01c Mon Sep 17 00:00:00 2001
From: Rokas Puzonas <rokas.puz@gmail.com>
Date: Sun, 18 Feb 2024 20:43:26 +0200
Subject: [PATCH] draw player healthbar

---
 src/main-scene.zig | 80 ++++++++++++++++++++++++++++++----------------
 1 file changed, 53 insertions(+), 27 deletions(-)

diff --git a/src/main-scene.zig b/src/main-scene.zig
index c145c6b..e690384 100644
--- a/src/main-scene.zig
+++ b/src/main-scene.zig
@@ -77,6 +77,7 @@ const Player = struct {
     input: PlayerInput = PlayerInput.init(),
 
     health: u32 = 3,
+    maxHealth: u32 = 3,
     dead: bool = false,
     invincibility: f32 = 0,
 
@@ -241,6 +242,7 @@ fn tickPlayer(self: *Self) void {
     var player = &self.player;
     var rope = &self.rope;
 
+    player.invincibility = @max(0, player.invincibility - dt);
     player.acceleration = rl.Vector2.zero();
 
     if (player.alive()) {
@@ -337,12 +339,15 @@ fn tickEnemies(self: *Self) !void {
 }
 
 fn damagePlayer(self: *Self) void {
-    if (self.player.alive()) {
-        self.player.health -= 1;
+    const player = &self.player;
+
+    if (player.alive()) {
+        player.health -= 1;
+        player.invincibility = 0.8;
     }
 
-    if (!self.player.alive()) {
-        self.player.input.deactivate();
+    if (!player.alive()) {
+        player.input.deactivate();
     }
 }
 
@@ -544,16 +549,56 @@ fn togglePaused(self: *Self) void {
     }
 }
 
+fn drawPlayer(self: *Self) void {
+    var player = &self.player;
+    const handPosition = player.getHandPosition();
+
+    const healthWidth = 5;
+    const healthPercent = @as(f32, @floatFromInt(player.health)) / @as(f32, @floatFromInt(player.maxHealth));
+    var healthColor = rl.GREEN;
+    if (player.invincibility > 0 and @rem(player.invincibility, 0.2) < 0.1) {
+        healthColor = rl.RED;
+    }
+    rl.DrawCircleSector(
+        player.position,
+        playerSize + healthWidth,
+        0,
+        360 * healthPercent,
+        0,
+        healthColor,
+    );
+    for (0..(player.health+1)) |i| {
+        const percent = @as(f32, @floatFromInt(i)) / @as(f32, @floatFromInt(player.maxHealth));
+        rl.DrawLineV(
+            player.position,
+            player.position.add((rl.Vector2{ .x = playerSize + healthWidth, .y = 0 }).rotate(percent * 2 * rl.PI)),
+            rl.BLACK
+        );
+    }
+    rl.DrawCircle(
+        @intFromFloat(player.position.x),
+        @intFromFloat(player.position.y),
+        playerSize,
+        rl.RAYWHITE
+    );
+    rl.DrawCircle(
+        @intFromFloat(handPosition.x),
+        @intFromFloat(handPosition.y),
+        5,
+        rl.RAYWHITE
+    );
+}
+
 pub fn tick(self: *Self) !void {
-    rl.ClearBackground(rl.BLACK);
+    rl.ClearBackground(rl.BROWN);
 
     const screenSize = getScreenSize();
+    const dt = rl.GetFrameTime();
 
     self.camera.offset.x = screenSize.x/2;
     self.camera.offset.y = screenSize.y/2;
-    self.camera.target = self.player.position;
+    self.camera.target = rl.Vector2Lerp(self.camera.target, self.player.position, 10 * dt);
 
-    var player = &self.player;
     var enemies = &self.enemies;
     var rope = &self.rope;
 
@@ -571,31 +616,12 @@ pub fn tick(self: *Self) !void {
     }
 
     const deathBallPosition = rope.nodePositions.get(rope.nodePositions.len-1);
-    const handPosition = player.getHandPosition();
 
     rl.BeginMode2D(self.camera);
     {
         rl.DrawCircle(0, 0, 5, rl.GOLD);
 
-        rl.DrawCircle(
-            @intFromFloat(player.position.x),
-            @intFromFloat(player.position.y),
-            playerSize,
-            rl.RAYWHITE
-        );
-        rl.DrawCircle(
-            @intFromFloat(handPosition.x),
-            @intFromFloat(handPosition.y),
-            5,
-            rl.RAYWHITE
-        );
-        rl.DrawLine(
-            @intFromFloat(player.position.x),
-            @intFromFloat(player.position.y),
-            @intFromFloat(player.position.x + player.velocity.x),
-            @intFromFloat(player.position.y + player.velocity.y),
-            rl.GREEN
-        );
+        self.drawPlayer();
 
         for (enemies.items) |*enemy| {
             var color = enemy.color;