Fix camera not working problem at align z direction. #924 (#1013)

* Fix camera not working problem at align z direction. #924

* replace tab to space x4

src/camera.h

@@ -243,13 +243,9 @@ void SetCameraMode(Camera camera, int mode)
 
     cameraTargetDistance = sqrtf(dx*dx + dy*dy + dz*dz);
 
-    Vector2 distance = { 0.0f, 0.0f };
-    distance.x = sqrtf(dx*dx + dz*dz);
-    distance.y = sqrtf(dx*dx + dy*dy);
-
     // Camera angle calculation
-    cameraAngle.x = asinf( (float)fabs(dx)/distance.x);  // Camera angle in plane XZ (0 aligned with Z, move positive CCW)
-    cameraAngle.y = -asinf( (float)fabs(dy)/distance.y); // Camera angle in plane XY (0 aligned with X, move positive CW)
+    cameraAngle.x = atan2f(dx, dz);                   // Camera angle in plane XZ (0 aligned with Z, move positive CCW)
+    cameraAngle.y = atan2f(dy, sqrtf(dx*dx + dz*dz)); // Camera angle in plane XY (0 aligned with X, move positive CW)
 
     playerEyesPosition = camera.position.y;
 
@@ -379,17 +375,16 @@ void UpdateCamera(Camera *camera)
                 else
                 {
                     // Camera panning
-                    camera->target.x += ((mousePositionDelta.x*-CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(cameraAngle.x) + (mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(cameraAngle.x)*sinf(cameraAngle.y))*(cameraTargetDistance/CAMERA_FREE_PANNING_DIVIDER);
+                    camera->target.x += ((mousePositionDelta.x*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(cameraAngle.x) + (mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(cameraAngle.x)*sinf(cameraAngle.y))*(cameraTargetDistance/CAMERA_FREE_PANNING_DIVIDER);
                     camera->target.y += ((mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(cameraAngle.y))*(cameraTargetDistance/CAMERA_FREE_PANNING_DIVIDER);
-                    camera->target.z += ((mousePositionDelta.x*CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(cameraAngle.x) + (mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(cameraAngle.x)*sinf(cameraAngle.y))*(cameraTargetDistance/CAMERA_FREE_PANNING_DIVIDER);
+                    camera->target.z += ((mousePositionDelta.x*-CAMERA_FREE_MOUSE_SENSITIVITY)*sinf(cameraAngle.x) + (mousePositionDelta.y*CAMERA_FREE_MOUSE_SENSITIVITY)*cosf(cameraAngle.x)*sinf(cameraAngle.y))*(cameraTargetDistance/CAMERA_FREE_PANNING_DIVIDER);
                 }
             }
 
             // Update camera position with changes
-            camera->position.x = sinf(cameraAngle.x)*cameraTargetDistance*cosf(cameraAngle.y) + camera->target.x;
-            camera->position.y = ((cameraAngle.y <= 0.0f)? 1 : -1)*sinf(cameraAngle.y)*cameraTargetDistance*sinf(cameraAngle.y) + camera->target.y;
-            camera->position.z = cosf(cameraAngle.x)*cameraTargetDistance*cosf(cameraAngle.y) + camera->target.z;
-
+            camera->position.x = -sinf(cameraAngle.x)*cameraTargetDistance*cosf(cameraAngle.y) + camera->target.x;
+            camera->position.y = -sinf(cameraAngle.y)*cameraTargetDistance + camera->target.y;
+            camera->position.z = -cosf(cameraAngle.x)*cameraTargetDistance*cosf(cameraAngle.y) + camera->target.z;
         } break;
         case CAMERA_ORBITAL:
         {