Added player health and health bar

game/shaders/health_bar.gdshader

@@ -0,0 +1,37 @@
+shader_type canvas_item;
+
+uniform float max_value;
+uniform float current_value;
+uniform float old_value;
+
+uniform vec4 health_color : source_color = vec4(0.0, 0.65, 0.0, 1.0);
+uniform vec4 depletion_color : source_color = vec4(0.0, 0.3, 0.0, 1.0);
+uniform vec4 restoration_color : source_color = vec4(0.0, 1.0, 0.0, 1.0);
+uniform vec4 background_color : source_color = vec4(0.0, 0.0, 0.0, 0.0);
+
+void fragment() {
+	float fill = current_value / max_value;
+	float old_fill = old_value / max_value;
+	
+	vec4 color;
+	
+	if (current_value <= old_value) {
+		if (UV.x < fill) {
+			color = health_color;
+		} else if (UV.x < old_fill) {
+			color = depletion_color;
+		} else {
+			color = background_color;
+		}
+	} else {
+		if (UV.x < old_fill) {
+			color = health_color;
+		} else if (UV.x < fill) {
+			color = restoration_color;
+		} else {
+			color = background_color;
+		}
+	}
+	
+	COLOR = vec4(color.rgb, color.a * COLOR.a);
+}

game/shaders/health_bar.gdshader.uid

@@ -0,0 +1 @@
+uid://cdo2tw14pkf6n