Working on different collider types.

src/dawn/physics/2d/Box.cpp

@@ -77,5 +77,23 @@ bool_t Dawn::boxCheckCollision(
   entryPoint = posA + velocity * entryTime;
   exitPoint = posA + velocity * exitTime;
 
+  return true;
+}
+
+bool_t Dawn::boxIsBoxColliding(
+  glm::vec2 posA, glm::vec2 minA, glm::vec2 maxA,
+  glm::vec2 posB, glm::vec2 minB, glm::vec2 maxB
+) {
+  // Check for no overlap in X axis
+  if (posA.x + maxA.x < posB.x + minB.x || posA.x + minA.x > posB.x + maxB.x) {
+    return false;
+  }
+
+  // Check for no overlap in Y axis
+  if (posA.y + maxA.y < posB.y + minB.y || posA.y + minA.y > posB.y + maxB.y) {
+    return false;
+  }
+
+  // There is overlap in both X and Y axis, so the boxes are colliding
   return true;
 }

src/dawn/physics/2d/Box.hpp

@@ -20,6 +20,22 @@ namespace Dawn {
     glm::vec2 &exitPoint
   );
 
+  /**
+   * Checks if two boxes are colliding.
+   * 
+   * @param posA Position of the first box.
+   * @param minA Minimum point on the first box.
+   * @param maxA Maximum point on the first box.
+   * @param posB Position of the second box.
+   * @param minB Minimum point on the second box.
+   * @param maxB Maximum point on the second box.
+   * @return True if the boxes are colliding with each other, false otherwise.
+   */
+  bool_t boxIsBoxColliding(
+    glm::vec2 posA, glm::vec2 minA, glm::vec2 maxA,
+    glm::vec2 posB, glm::vec2 minB, glm::vec2 maxB
+  );
+
   /**
    * Checks if a given point is within the 2D Boundaries of an object.
    * 

src/dawn/scene/components/physics/2d/CMakeLists.txt

@@ -9,4 +9,6 @@ target_sources(${DAWN_TARGET_NAME}
     BoxCollider.cpp
     Collider2D.cpp
     CharacterController2D.cpp
+    SolidController2D.cpp
+    TriggerCollider2D.cpp
 )

src/dawn/scene/components/physics/2d/CharacterController2D.cpp

@@ -14,23 +14,23 @@ CharacterController2D::CharacterController2D(SceneItem *i) :
 
 void CharacterController2D::onStart() {
   useEvent([&](float_t delta){
-    // Friction
-    velocity -= velocity * friction * delta;
-
+    // Common variables
     auto myCollider = item->getComponent<Collider2D>();
     glm::vec2 currentPosition(
       this->transform->getLocalPosition().x,
       this->transform->getLocalPosition().z
     );
 
+    // Friction
+    velocity -= velocity * friction * delta;
 
-    // Perform movement and check for collisions.
+    // Solid Collision Check
     glm::vec2 moveAmount;
     if(myCollider == nullptr) {
       moveAmount = velocity;
     } else {
       // Perform sweep
-      auto allColliders = getScene()->findComponents<Collider2D>();
+      auto allColliders = getScene()->findComponents<SolidController2D>();
       auto itColliders = allColliders.begin();
 
       struct CharacterController2DCollisionEventInfo info;
@@ -40,16 +40,17 @@ void CharacterController2D::onStart() {
       while(itColliders != allColliders.end()) {
         auto c = *itColliders;
         ++itColliders;
-        if(c == myCollider) continue;
-        result = myCollider->getCollidingResult(
+        if(c->item == this->item) continue;
+        result = c->getCollidingResult(
           velocity,
-          c,
+          myCollider,
           info.normal,
           info.entryTime,
           info.exitTime,
           info.entryPoint,
           info.exitPoint
         ) && info.entryTime <= delta;
+
         if(result) {
           info.collider = c;
           break;
@@ -73,5 +74,18 @@ void CharacterController2D::onStart() {
     transform->setLocalPosition(
       transform->getLocalPosition() + (glm::vec3(moveAmount.x, 0, moveAmount.y) * delta)
     );
+
+    // Now perform trigger collision check
+    auto allTriggers = getScene()->findComponents<TriggerController2D>();
+    auto itTriggers = allTriggers.begin();
+    while(itTriggers != allTriggers.end()) {
+      auto c = *itTriggers;
+      ++itTriggers;
+      if(c->item == this->item) continue;
+      if(c->getCollidingResult(myCollider)) {
+        c->eventTriggerEnter.invoke(this);
+      }
+    }
+
   }, getScene()->eventSceneUpdate);
 }

src/dawn/scene/components/physics/2d/CharacterController2D.hpp

@@ -4,11 +4,12 @@
 // https://opensource.org/licenses/MIT
 
 #pragma once
-#include "Collider2D.hpp"
+#include "SolidController2D.hpp"
+#include "TriggerController2D.hpp"
 
 namespace Dawn {
   struct CharacterController2DCollisionEventInfo {
-    Collider2D *collider;
+    SolidController2D *collider;
     glm::vec2 normal;
     float_t entryTime;
     float_t exitTime;

src/dawn/scene/components/physics/2d/Collider2D.cpp

@@ -10,58 +10,4 @@ using namespace Dawn;
 
 Collider2D::Collider2D(SceneItem *i) : SceneItemComponent(i) {
   
-}
-
-bool_t Collider2D::getCollidingResult(
-  glm::vec2 movement,
-  Collider2D *other,
-  glm::vec2 &normal,
-  float_t &entryTime,
-  float_t &exitTime,
-  glm::vec2 &entryPoint,
-  glm::vec2 &exitPoint
-) {
-  assertNotNull(other);
-  if(movement.x == 0 && movement.y == 0) return false;
-
-  auto localPos = this->transform->getLocalPosition();
-  glm::vec2 myPos(localPos.x, localPos.z);
-
-
-  // Check what THIS is
-  switch(this->getColliderType()) {
-    case COLLIDER2D_TYPE_BOX: {
-      auto box1 = dynamic_cast<BoxCollider*>(this);
-      assertNotNull(box1);
-
-      // Box VS ?
-      switch(other->getColliderType()) {
-        case COLLIDER2D_TYPE_BOX: {
-          auto box2 = dynamic_cast<BoxCollider*>(other);
-          assertNotNull(box2);
-          auto localPos2 = box2->transform->getLocalPosition();
-          glm::vec2 otherPos(localPos2.x, localPos2.z);
-
-          return boxCheckCollision(
-            myPos, box1->min, box1->max,
-            otherPos, box2->min, box2->max,
-            movement,
-            normal, entryTime, exitTime, entryPoint, exitPoint
-          );
-        }
-        
-        default: {
-          assertUnreachable();
-        }
-      }
-      break;
-    }
-
-    default: {
-      assertUnreachable();
-    }
-  }
-  
-  assertUnreachable();
-  return false;
 }

src/dawn/scene/components/physics/2d/Collider2D.hpp

@@ -30,29 +30,5 @@ namespace Dawn {
        * @return The collider type that this is.
        */
       virtual enum Collider2DType getColliderType() = 0;
-
-      /**
-       * Gets the result of checking if two collider bodies are intersecting.
-       * This is performed WITH movement to return entry and exit times.
-       * 
-       * @param result Where to store the results of the calculation.
-       * @param movement Movement operation that THIS object is performing.
-       * @param other Other Collider that is being compared.
-       * @param normal Output normal of the intersection.
-       * @param entryTime Output entry time when the two objects will intersect.
-       * @param exitTime Output exit time when the object will pass through.
-       * @param entryPoint Output point in 2D space where object will enter.
-       * @param exitPoint Output point where object will have passed through.
-       * @return True if the two objects will intersect at move otherwise false.
-       */
-      bool_t getCollidingResult(
-        glm::vec2 movement,
-        Collider2D *other,
-        glm::vec2 &normal,
-        float_t &entryTime,
-        float_t &exitTime,
-        glm::vec2 &entryPoint,
-        glm::vec2 &exitPoint
-      );
   };
 }

src/dawn/scene/components/physics/2d/SolidController2D.cpp

@@ -0,0 +1,72 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "SolidController2D.hpp"
+
+using namespace Dawn;
+
+SolidController2D::SolidController2D(SceneItem *item) : SceneItemComponent(item) {
+}
+
+std::vector<SceneItemComponent*> SolidController2D::getDependencies() {
+  return {
+    (this->collider = item->getComponent<Collider2D>())
+  };
+}
+
+bool_t SolidController2D::getCollidingResult(
+  glm::vec2 movement,
+  Collider2D *movingObject,
+  glm::vec2 &normal,
+  float_t &entryTime,
+  float_t &exitTime,
+  glm::vec2 &entryPoint,
+  glm::vec2 &exitPoint
+) {
+  assertNotNull(this->collider);
+  assertNotNull(movingObject);
+  if(movement.x == 0 && movement.y == 0) return false;
+
+  auto localPos = this->transform->getLocalPosition();
+  glm::vec2 myPos(localPos.x, localPos.z);
+
+
+  // Check what THIS is
+  switch(movingObject->getColliderType()) {
+    case COLLIDER2D_TYPE_BOX: {
+      auto box1 = dynamic_cast<BoxCollider*>(this);
+      assertNotNull(box1);
+
+      // Box VS ?
+      switch(collider->getColliderType()) {
+        case COLLIDER2D_TYPE_BOX: {
+          auto box2 = dynamic_cast<BoxCollider*>(collider);
+          assertNotNull(box2);
+          auto localPos2 = box2->transform->getLocalPosition();
+          glm::vec2 otherPos(localPos2.x, localPos2.z);
+
+          return boxCheckCollision(
+            myPos, box1->min, box1->max,
+            otherPos, box2->min, box2->max,
+            movement,
+            normal, entryTime, exitTime, entryPoint, exitPoint
+          );
+        }
+        
+        default: {
+          assertUnreachable();
+        }
+      }
+      break;
+    }
+
+    default: {
+      assertUnreachable();
+    }
+  }
+  
+  assertUnreachable();
+  return false;
+}

src/dawn/scene/components/physics/2d/SolidController2D.hpp

@@ -0,0 +1,42 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "Collider2D.hpp"
+#include "BoxCollider.hpp"
+
+namespace Dawn {
+  class SolidController2D : public SceneItemComponent {
+    public:
+      Collider2D *collider = nullptr;
+
+      SolidController2D(SceneItem *item);
+      std::vector<SceneItemComponent*> getDependencies() override;
+
+      /**
+       * Gets the result of checking if two collider bodies are intersecting.
+       * This is performed WITH movement to return entry and exit times.
+       * 
+       * @param result Where to store the results of the calculation.
+       * @param movement Movement operation that THIS object is performing.
+       * @param movingObject Moving Object Collider that is being compared.
+       * @param normal Output normal of the intersection.
+       * @param entryTime Output entry time when the two objects will intersect.
+       * @param exitTime Output exit time when the object will pass through.
+       * @param entryPoint Output point in 2D space where object will enter.
+       * @param exitPoint Output point where object will have passed through.
+       * @return True if the two objects will intersect at move otherwise false.
+       */
+      bool_t getCollidingResult(
+        glm::vec2 movement,
+        Collider2D *movingObject,
+        glm::vec2 &normal,
+        float_t &entryTime,
+        float_t &exitTime,
+        glm::vec2 &entryPoint,
+        glm::vec2 &exitPoint
+      );
+  };
+}

src/dawn/scene/components/physics/2d/TriggerController2D.cpp

@@ -0,0 +1,50 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "TriggerController2D.hpp"
+
+using namespace Dawn;
+
+TriggerController2D::TriggerController2D(SceneItem *i) : SceneItemComponent(i) {
+  
+}
+
+std::vector<SceneItemComponent*> TriggerController2D::getDependencies() {
+  return {
+    (this->collider = this->item->getComponent<Collider2D>())
+  };
+}
+
+bool_t TriggerController2D::getCollidingResult(Collider2D* movingObject) {
+  assertNotNull(this->collider);
+  assertNotNull(movingObject);
+
+  switch(movingObject->getColliderType()) {
+    case COLLIDER2D_TYPE_BOX: {
+      auto box1 = dynamic_cast<BoxCollider*>(movingObject);
+      assertNotNull(box1);
+
+      // Box VS ?
+      switch(collider->getColliderType()) {
+        case COLLIDER2D_TYPE_BOX: {
+          auto box2 = dynamic_cast<BoxCollider*>(collider);
+          assertNotNull(box2);
+          return boxIsBoxColliding(
+            box1->transform->getWorldPosition(), box1->min, box1->max,
+            box2->transform->getWorldPosition(), box2->min, box2->max
+          );
+        }
+        
+        default: {
+          assertUnreachable();
+        }
+      }
+    }
+    
+    default: {
+      assertUnreachable();
+    }
+  }
+}

src/dawn/scene/components/physics/2d/TriggerController2D.hpp

@@ -0,0 +1,25 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "Collider2D.hpp"
+
+namespace Dawn {
+  class TriggerController2D : public SceneItemComponent {
+    public:
+      Collider2D *collider = nullptr;
+
+      StateEvent<CharacterController2D*> eventTriggerEnter;
+
+      TriggerController2D(SceneItem *i);
+      std::vector<SceneItemComponent*> getDependencies() override;
+
+      /**
+       * Returns whether or not the given moving object is colliding with this
+       * trigger collider.
+       */
+      bool_t getCollidingResult(Collider2D* movingObject)
+  };
+}