From bf400b26e470fe8764e2573d339683d610079bf2 Mon Sep 17 00:00:00 2001
From: Mark McIlroy <m1rk.mci@gmail.com>
Date: Fri, 15 Dec 2023 09:02:53 +0000
Subject: [PATCH] example_core_3d_camera_free

---
 examples/core_3d_camera_free.rs | 67 +++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 examples/core_3d_camera_free.rs

diff --git a/examples/core_3d_camera_free.rs b/examples/core_3d_camera_free.rs
new file mode 100644
index 0000000..c1d95b3
--- /dev/null
+++ b/examples/core_3d_camera_free.rs
@@ -0,0 +1,67 @@
+use raylib_ffi::*;
+
+pub fn main() {
+    unsafe {
+        // Create a window
+        InitWindow(800, 450, rl_str!("raylib-ffi example - basic window"));
+
+        // Define the camera to look into our 3d world (position, target, up vector)
+        let mut camera = Camera{
+            position: Vector3{ x: 10.0, y: 10.0, z: 10.0 },         // Camera position
+            target: Vector3{ x: 0.0, y: 0.0, z: 0.0 },              // Camera looking at point     
+            up: Vector3{ x: 0.0, y: 1.0, z: 0.0 },                  // Camera up vector (rotation towards target)
+            fovy: 45.0,                                             // Camera field-of-view Y
+            projection: enums::CameraProjection::Perspective as i32 // Camera projection type
+        };
+
+        let cube_position = Vector3{ x: 0.0, y: 0.0, z: 0.0 };
+
+        DisableCursor();                // Limit cursor to relative movement inside the window
+
+        SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+
+        while !(WindowShouldClose()) {  // Detect window close button or ESC key
+
+            // Update
+            //----------------------------------------------------------------------------------
+            UpdateCamera(&mut camera, enums::CameraMode::Free as i32);
+
+            if IsKeyPressed(enums::KeyboardKey::Z as i32) {
+                camera.target = Vector3{ x: 0.0, y: 0.0, z: 0.0 };
+            }
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+
+                ClearBackground(colors::WHITE);
+
+                BeginMode3D(camera);
+
+                    DrawCube(cube_position, 2.0, 2.0, 2.0, colors::RED);
+                    DrawCubeWires(cube_position, 2.0, 2.0, 2.0, colors::MAROON);
+                    DrawGrid(10, 1.0);
+
+                EndMode3D();
+
+                DrawRectangle( 10, 10, 320, 133, Fade(colors::SKYBLUE, 0.5));
+                DrawRectangleLines( 10, 10, 320, 133, colors::BLUE);
+    
+                DrawText(rl_str!("Free camera default controls:"), 20, 20, 10, colors::BLACK);
+                DrawText(rl_str!("- Mouse Wheel to Zoom in-out"), 40, 40, 10, colors::DARKGRAY);
+                DrawText(rl_str!("- Mouse Wheel Pressed to Pan"), 40, 60, 10, colors::DARKGRAY);
+                DrawText(rl_str!("- Alt + Mouse Wheel Pressed to Rotate"), 40, 80, 10, colors::DARKGRAY);
+                DrawText(rl_str!("- Alt + Ctrl + Mouse Wheel Pressed for Smooth Zoom"), 40, 100, 10, colors::DARKGRAY);
+                DrawText(rl_str!("- Z to zoom to (0, 0, 0)"), 40, 120, 10, colors::DARKGRAY);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+    }
+}