add basic shoot on enemy

ROADMAP.txt

@@ -1,5 +1,9 @@
 ------------ Tyra's v2.0 roadmap to publish on GitHub ------------
 
+- [Renderer] utility functions
+- [Renderer] drawLine()
+- [Renderer] drawBBox()
+- [Renderer] drawPoint()
 - [Demo] Red screen on hit
 - [Demo] Count of killed zombies
 - [Demo] Crosshair
@@ -36,9 +40,7 @@ because Mesh rendering uses only core.render()
 - [renderer] fog
 - [renderer] bbox parts optimization
 - [md2] refactor
-- [3D] Add drawLine(x, y , color, size)
 - [2D] Fixed font support
-- [3D] Add drawBBox(x, y , color, size)
 - [File] Async file loading
 - [obj] Add multicolor support to obj
 - [Obj] Improve obj importing for multiple usemtl with same names

demo/inc/states/game/enemy/enemy.hpp

@@ -13,6 +13,7 @@
 #include <tyra>
 #include "states/game/renderer/renderer_dynamic_pair.hpp"
 #include "states/game/terrain/heightmap.hpp"
+#include "states/game/player/player_shoot_action.hpp"
 #include "./enemy_info.hpp"
 
 using Tyra::AnimationSequenceCallback;
@@ -35,7 +36,8 @@ class Enemy {
   DynPipOptions* options;
   RendererDynamicPair* pair;
 
-  void update(const Heightmap& heightmap, const Vec4& playerPosition);
+  void update(const Heightmap& heightmap, const Vec4& playerPosition,
+              const PlayerShootAction& shootAction);
 
  private:
   std::vector<u32> walkSequence;
@@ -45,9 +47,11 @@ class Enemy {
   void walk(const Heightmap& heightmap, const Vec4& positionDiff);
   void animationCallback(const AnimationSequenceCallback& callback);
   void fight();
+  void handlePlayerShoot(const PlayerShootAction& shootAction);
 
   bool isWalking = true;
   bool isFighting = false;
+  Vec4 spawnPoint;
 
   Audio* audio;
   EnemyInfo info;

demo/inc/states/game/enemy/enemy_manager.hpp

@@ -13,6 +13,7 @@
 #include <tyra>
 #include <vector>
 #include "states/game/terrain/heightmap.hpp"
+#include "states/game/player/player_shoot_action.hpp"
 #include "./enemy.hpp"
 
 using Tyra::DynamicMesh;
@@ -28,7 +29,8 @@ class EnemyManager {
   EnemyManager(Engine* engine, const Heightmap& heightmap);
   ~EnemyManager();
 
-  void update(const Heightmap& heightmap, const Vec4& playerPosition);
+  void update(const Heightmap& heightmap, const Vec4& playerPosition,
+              const PlayerShootAction& shootAction);
 
   std::vector<RendererDynamicPair*> getPairs() const;
 

demo/src/states/game/enemy/enemy.cpp

@@ -39,6 +39,7 @@ Enemy::Enemy(Engine* engine, const EnemyInfo& t_info) {
   walkSequence = {0, 1, 2};
   fightSequence = {3, 4, 5};
 
+  spawnPoint = info.spawnPoint;
   mesh->setPosition(info.spawnPoint);
 
   mesh->animation.setSequence(walkSequence);
@@ -61,9 +62,12 @@ Enemy::~Enemy() {
   delete pair;
 }
 
-void Enemy::update(const Heightmap& heightmap, const Vec4& playerPosition) {
+void Enemy::update(const Heightmap& heightmap, const Vec4& playerPosition,
+                   const PlayerShootAction& shootAction) {
   auto* enemyPosition = mesh->getPosition();
 
+  handlePlayerShoot(shootAction);
+
   auto diff = *enemyPosition - playerPosition;
   auto ang = Math::atan2(diff.x, diff.z);
 
@@ -81,6 +85,23 @@ void Enemy::update(const Heightmap& heightmap, const Vec4& playerPosition) {
   mesh->update();
 }
 
+void Enemy::handlePlayerShoot(const PlayerShootAction& shootAction) {
+  if (!shootAction.isShooting) {
+    return;
+  }
+
+  const auto& ray = shootAction.ray.value();
+  auto bbox =
+      mesh->getCurrentBoundingBox().getTransformed(mesh->getModelMatrix());
+
+  auto isOnEnemy = ray.intersectBox(bbox.min(), bbox.max());
+
+  if (isOnEnemy) {
+    mesh->setPosition(spawnPoint);
+    TYRA_LOG("Enemy hit!");
+  }
+}
+
 void Enemy::walk(const Heightmap& heightmap, const Vec4& positionDiff) {
   if (isFighting) {
     mesh->animation.setSequence(walkSequence);

demo/src/states/game/enemy/enemy_manager.cpp

@@ -43,7 +43,7 @@ EnemyManager::EnemyManager(Engine* engine, const Heightmap& heightmap) {
   auto* sample = engine->audio.adpcm.load(
       FileUtils::fromCwd("game/models/zombie/punch.adpcm"));
 
-  const int enemyCount = 10;
+  const int enemyCount = 2;
   for (int i = 0; i < enemyCount; i++) {
     EnemyInfo info;
     info.adpcmChannel = 9 + i;
@@ -80,9 +80,10 @@ std::vector<RendererDynamicPair*> EnemyManager::getPairs() const {
 }
 
 void EnemyManager::update(const Heightmap& heightmap,
-                          const Vec4& playerPosition) {
+                          const Vec4& playerPosition,
+                          const PlayerShootAction& shootAction) {
   for (auto* enemy : enemies) {
-    enemy->update(heightmap, playerPosition);
+    enemy->update(heightmap, playerPosition, shootAction);
   }
 }
 

demo/src/states/game/game_state.cpp

@@ -67,12 +67,8 @@ void GameState::update() {
 
   skybox->update(player->getPosition());
   player->update(terrain->heightmap);
-  enemyManager->update(terrain->heightmap, player->getPosition());
-
   auto shootAction = player->getShootAction();
-  if (shootAction.isShooting) {
-    shootAction.ray.value().print();
-  }
+  enemyManager->update(terrain->heightmap, player->getPosition(), shootAction);
 
   auto cameraInfo = player->getCameraInfo();
   dbgObj->setPosition(*cameraInfo.looksAt);