enemy position and rotation

ROADMAP.txt

@@ -1,6 +1,5 @@
 ------------ Tyra's v2.0 roadmap to publish on GitHub ------------
 
-- [Demo] Enemy running and rotating to player
 - [Demo] Crosshair
 - [Demo] 2D Health bar
 - [Demo] Change enemy to monster

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

@@ -36,7 +36,6 @@ class Enemy {
   void update(const Heightmap& heightmap, const Vec4& playerPosition);
 
  private:
-  Vec4 direction;
   void allocateOptions();
 };
 

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

@@ -13,6 +13,7 @@
 #include <file/file_utils.hpp>
 
 using Tyra::FileUtils;
+using Tyra::Math;
 using Tyra::ObjLoader;
 using Tyra::ObjLoaderOptions;
 
@@ -43,8 +44,6 @@ Enemy::Enemy(TextureRepository* repo) {
   allocateOptions();
 
   pair = new RendererDynamicPair{mesh, options};
-
-  direction = Vec4(1.0F, 0.0F, 1.0F, 0.0F);
 }
 
 Enemy::~Enemy() {
@@ -54,18 +53,25 @@ Enemy::~Enemy() {
 }
 
 void Enemy::update(const Heightmap& heightmap, const Vec4& playerPosition) {
-  auto* pos = mesh->getPosition();
+  auto* enemyPosition = mesh->getPosition();
-  auto nextPos = *pos + direction;
 
-  if (heightmap.isOutside(nextPos)) {
+  auto diff = *enemyPosition - playerPosition;
-    direction.x = -direction.x;
+  auto ang = Math::atan2(diff.x, diff.z);
-    direction.z = -direction.z;
+
+  if (diff.length() > 120.0F) {
+    diff.normalize();
+    const float speed = 1.5F;
+    auto nextPos = *enemyPosition - diff * speed;
+    nextPos.y = heightmap.getHeightOffset(nextPos) - 150.0F;
+
+    mesh->translation.identity();
+    mesh->translation.translate(nextPos);
   }
 
-  nextPos = *pos + direction;
+  const float naturalRotation = 3.1F;
-  nextPos.y = heightmap.getHeightOffset(nextPos) - 150.0F;
+  mesh->rotation.identity();
-  mesh->translation.identity();
+  ang += naturalRotation;
-  mesh->translation.translate(nextPos);
+  mesh->rotation.rotateByAngle(ang, Vec4(0.0F, 1.0F, 0.0F, 0.0F));
 
   mesh->animate();
 }

demo/src/states/game/game_state.cpp

@@ -78,7 +78,7 @@ void GameState::update() {
     renderer.add(skybox->pair);
     renderer.add(player->pair);
     renderer.add(enemy->pair);
-    renderer.add(terrain->pair);
+    // renderer.add(terrain->pair);
     renderer.add(dbgObj->pair);
   }
   renderer.render();

demo/src/states/game/terrain/terrain.cpp

@@ -23,24 +23,24 @@ Terrain::Terrain(TextureRepository* repo)
                 Vec4(-750.0F, 0.0F, -1400.0F, 1.0F),  // Left up
                 Vec4(920.0F, 0.0F, 1520.0F, 1.0F)     // Right down
       ) {
-  ObjLoader loader;
+  // ObjLoader loader;
 
-  ObjLoaderOptions objOptions;
+  // ObjLoaderOptions objOptions;
-  objOptions.flipUVs = true;
+  // objOptions.flipUVs = true;
-  objOptions.scale = 100.0F;
+  // objOptions.scale = 100.0F;
 
-  auto* data = loader.load(
+  // auto* data = loader.load(
-      FileUtils::fromCwd("game/models/terrain/terrain.obj"), objOptions);
+  //     FileUtils::fromCwd("game/models/terrain/terrain.obj"), objOptions);
-  data->normalsEnabled = false;
+  // data->normalsEnabled = false;
-  mesh = new StaticMesh(*data);
+  // mesh = new StaticMesh(*data);
 
-  delete data;
+  // delete data;
 
-  repo->addByMesh(mesh, FileUtils::fromCwd("game/models/terrain/"), "png");
+  // repo->addByMesh(mesh, FileUtils::fromCwd("game/models/terrain/"), "png");
 
-  allocateOptions();
+  // allocateOptions();
 
-  pair = new RendererStaticPair{mesh, options};
+  // pair = new RendererStaticPair{mesh, options};
 }
 
 float Terrain::getHeightOffset(const Vec4& playerPosition) {

engine/src/math/m4x4.cpp

@@ -338,9 +338,9 @@ void M4x4::rotationZ(const float& v) {
 void M4x4::rotationByAngle(const float& angle, const Vec4& axis) {
   Vec4 localAxis = Vec4(axis);
   localAxis.normalize();
-  float x = localAxis.x;
+  const float& x = localAxis.x;
-  float y = localAxis.y;
+  const float& y = localAxis.y;
-  float z = localAxis.z;
+  const float& z = localAxis.z;
 
   float c = Math::cos(angle);
   float s = Math::sin(angle);