feat: add collisionhandling

src/appGameCollisions.c

@@ -0,0 +1,75 @@
+#include "app.h"
+#include <raylib.h>
+
+void CheckPlayerEnemyCollisions(Player *player, Enemies *enemies) {
+  for (int i = 0; i < enemies->count; i++) {
+
+    Vector2 playerPos = player->physics.position;
+    Vector2 enemiesPos = enemies->physics[i].position;
+
+    float playerRadius = 8.0f;
+    float enemiesRadius = 8.0f;
+    float minDist = playerRadius + enemiesRadius;
+
+    if (CheckCollisionCircles(playerPos, playerRadius, enemiesPos,
+                              enemiesRadius)) {
+      float dist = GetDistanceBetweenTwoVectors(playerPos, enemiesPos);
+      float overlap = minDist - dist;
+
+      if (dist > 0.0f) {
+        Vector2 collisionVector = GetDirectionBetweenTwoVectors(
+            enemies->physics[i].position, player->physics.position);
+        player->physics.position.x += collisionVector.x * overlap;
+        player->physics.position.y += collisionVector.y * overlap;
+        Vector2 forward = RotationToVector2(player->rotation - 90.0f);
+        float side = Cross2D(forward, collisionVector);
+        player->rotation += side * 120.0f * GetFrameTime();
+      }
+    }
+  }
+}
+void CheckEnemyEnemyCollisions(Enemies *enemies) {
+  for (int a = 0; a < enemies->count; a++) {
+    for (int b = a + 1; b < enemies->count; b++) {
+
+      Vector2 posA = enemies->physics[a].position;
+      Vector2 posB = enemies->physics[b].position;
+
+      float enemiesRadius = 8.0f;
+      float minDist = enemiesRadius * 2;
+
+      if (CheckCollisionCircles(posA, enemiesRadius, posB, enemiesRadius)) {
+
+        Vector2 collisionVectorA = GetDirectionBetweenTwoVectors(posB, posA);
+        Vector2 collisionVectorB = GetDirectionBetweenTwoVectors(posA, posB);
+        float dist = GetDistanceBetweenTwoVectors(posA, posB);
+        float overlap = minDist - dist;
+
+        if (dist > 0.0f) {
+          enemies->physics[a].position.x += collisionVectorA.x * overlap * 0.5f;
+          enemies->physics[a].position.y += collisionVectorA.y * overlap * 0.5f;
+
+          enemies->physics[b].position.x += collisionVectorB.x * overlap * 0.5f;
+          enemies->physics[b].position.y += collisionVectorB.y * overlap * 0.5f;
+
+          Vector2 forwardA =
+              RotationToVector2(enemies->sprite[a].rotation - 90.0f);
+          Vector2 forwardB =
+              RotationToVector2(enemies->sprite[b].rotation - 90.0f);
+          float sideA = Cross2D(forwardA, collisionVectorA);
+          float sideB = Cross2D(forwardB, collisionVectorB);
+          enemies->sprite[a].rotation += sideA * 120.0f * GetFrameTime();
+          enemies->sprite[b].rotation += sideB * 120.0f * GetFrameTime();
+        }
+      }
+    }
+  }
+}
+
+void CheckProjectileEnemyCollisions(Projectiles *projectiles,
+                                    Enemies *enemies) {
+  for (int i = 0; i < projectiles->count; i++) {
+    for (int j = 0; j < enemies->count; j++) {
+    }
+  }
+}