combat system overhaul - d20/hack-like

src/gamesystem.rs

@@ -0,0 +1,62 @@
+use super::{Skill, Skills};
+
+pub fn attr_bonus(value: i32) -> i32 {
+    return (value - 10) / 2;
+}
+
+pub fn player_hp_per_level(rng: &mut rltk::RandomNumberGenerator, constitution: i32) -> i32 {
+    return rng.roll_dice(1, 8) + attr_bonus(constitution);
+}
+
+pub fn player_hp_at_level(rng: &mut rltk::RandomNumberGenerator, constitution: i32, level: i32) -> i32 {
+    let mut total = 10 + attr_bonus(constitution);
+    for _i in 0..level {
+        total += player_hp_per_level(rng, constitution);
+    }
+    return total;
+}
+
+pub fn npc_hp(rng: &mut rltk::RandomNumberGenerator, constitution: i32, level: i32) -> i32 {
+    let mut total = 1;
+    for _i in 0..level {
+        total += rng.roll_dice(1, 8) + attr_bonus(constitution);
+    }
+    return total;
+}
+
+pub fn mana_per_level(rng: &mut rltk::RandomNumberGenerator, intelligence: i32) -> i32 {
+    return rng.roll_dice(1, 4) + attr_bonus(intelligence);
+}
+
+pub fn mana_at_level(rng: &mut rltk::RandomNumberGenerator, intelligence: i32, level: i32) -> i32 {
+    let mut total = 12;
+    for _i in 0..level {
+        total += mana_per_level(rng, intelligence);
+    }
+    return total;
+}
+
+pub fn skill_bonus(skill: Skill, skills: &Skills) -> i32 {
+    if skills.skills.contains_key(&skill) {
+        return skills.skills[&skill];
+    } else {
+        return -4;
+    }
+}
+
+pub fn roll_4d6(rng: &mut rltk::RandomNumberGenerator) -> i32 {
+    let mut rolls: Vec<i32> = Vec::new();
+    for _i in 0..4 {
+        rolls.push(rng.roll_dice(1, 6));
+    }
+    rolls.sort_unstable();
+
+    let mut roll = 0;
+    rltk::console::log(format!("roll 0"));
+    for i in 1..rolls.len() {
+        roll += rolls[i];
+        rltk::console::log(format!("+ {}", rolls[i]));
+    }
+
+    return roll;
+}