Add weapons

game/systems/s_entity.c

@@ -141,6 +141,31 @@ void entityFollowPath(ecs_iter_t *it) {
     }
 }
 
+static void entityUpdateArm(ecs_entity_t armEntity, Position pos, Velocity vel,
+                            Rotation rot, Orientation orient) {
+    if (!armEntity) return;
+    const Arm arm = *ecs_get(ECS, armEntity, Arm);
+
+    Vector2 v = {arm.extended, 0.0f};
+    v = Vector2Rotate(v, orient + arm.offset);
+    v = Vector2Add(v, pos);
+    ecs_set_ptr(ECS, armEntity, Position, &v);
+}
+void entityUpdateArms(ecs_iter_t *it) {
+    Position *position = ecs_field(it, Position, 1);
+    Velocity *velocity = ecs_field(it, Velocity, 2);
+    Rotation *rotation = ecs_field(it, Rotation, 3);
+    Orientation *orientation = ecs_field(it, Orientation, 4);
+    Arms *arms = ecs_field(it, Arms, 5);
+
+    for (i32 i = 0; i < it->count; i++) {
+        entityUpdateArm(arms[i].primary, position[i], velocity[i],
+                        rotation[i], orientation[i]);
+        entityUpdateArm(arms[i].secondary, position[i], velocity[i],
+                        rotation[i], orientation[i]);
+    }
+}
+
 void renderColliders(ecs_iter_t *it) {
     Position *pos = ecs_field(it, Position, 1);
     Size *size = ecs_field(it, Size, 2);
@@ -152,19 +177,27 @@ void renderColliders(ecs_iter_t *it) {
     }
 }
 
-void renderRotationDirection(ecs_iter_t *it) {
+void renderOrientationDirection(ecs_iter_t *it) {
     Position *pos = ecs_field(it, Position, 1);
-    Rotation *rot = ecs_field(it, Rotation, 2);
+    Orientation *orientation = ecs_field(it, Orientation, 2);
 
     for (i32 i = 0; i < it->count; i++) {
-        Vector2 v = {10.0f, 0.0f};
-        v = Vector2Rotate(v, rot[i]);
+        Vector2 v = {6.0f, 0.0f};
+        v = Vector2Rotate(v, orientation[i]);
         v = Vector2Add(v, pos[i]);
-        DrawCircle(v.x, v.y, 1.0f, RED);
+        DrawLine(pos->x, pos->y, v.x, v.y, RED);
     }
-
 }
 
+void renderArmPosition(ecs_iter_t *it) {
+    Position *pos = ecs_field(it, Position, 1);
+    Arm *arm = ecs_field(it, Arm, 2);
+
+    for (i32 i = 0; i < it->count; i++) {
+        DrawCircle(pos[i].x, pos[i].y, 1.5f, ORANGE);
+
+    }
+}
 
 void renderDebugPath(ecs_iter_t *it) {
     Path *path = ecs_field(it, Path, 1);