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3d camera free

★☆☆☆by Ramon Santamaria (@raysan5)

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//! raylib [core] example - 3d camera free
//!
//! Zig-API translation of examples/core/core_3d_camera_free.c (raylib 6.2).
//! Example licensed under an unmodified zlib/libpng license.
//! Copyright (c) 2015-2025 Ramon Santamaria (@raysan5)

const rl = @import("raylib");

pub fn main() void {
    // Initialization
    const screen_width = 800;
    const screen_height = 450;

    rl.initWindow(screen_width, screen_height, "raylib [core] example - 3d camera free");
    defer rl.closeWindow(); // Close window and OpenGL context

    // Define the camera to look into our 3d world
    var camera: rl.Camera3D = .{
        .position = .{ .x = 10.0, .y = 10.0, .z = 10.0 }, // Camera position
        .target = .{ .x = 0.0, .y = 0.0, .z = 0.0 }, // Camera looking at point
        .up = .{ .x = 0.0, .y = 1.0, .z = 0.0 }, // Camera up vector (rotation towards target)
        .fovy = 45.0, // Camera field-of-view Y
        .projection = .perspective, // Camera projection type
    };

    const cube_position: rl.Vector3 = .{ .x = 0.0, .y = 0.0, .z = 0.0 };

    rl.disableCursor(); // Limit cursor to relative movement inside the window

    rl.setTargetFPS(60); // Set our game to run at 60 frames-per-second

    // Main game loop
    while (!rl.windowShouldClose()) { // Detect window close button or ESC key
        // Update
        rl.updateCamera(&camera, .free);

        if (rl.isKeyPressed(.z)) camera.target = .{ .x = 0.0, .y = 0.0, .z = 0.0 };

        // Draw
        rl.beginDrawing();
        defer rl.endDrawing();

        rl.clearBackground(.ray_white);

        {
            rl.beginMode3D(camera);
            defer rl.endMode3D();

            rl.drawCube(cube_position, 2.0, 2.0, 2.0, .red);
            rl.drawCubeWires(cube_position, 2.0, 2.0, 2.0, .maroon);

            rl.drawGrid(10, 1.0);
        }

        rl.drawRectangle(10, 10, 320, 93, rl.fade(.sky_blue, 0.5));
        rl.drawRectangleLines(10, 10, 320, 93, .blue);

        rl.drawText("Free camera default controls:", 20, 20, 10, .black);
        rl.drawText("- Mouse Wheel to Zoom in-out", 40, 40, 10, .dark_gray);
        rl.drawText("- Mouse Wheel Pressed to Pan", 40, 60, 10, .dark_gray);
        rl.drawText("- Z to zoom to (0, 0, 0)", 40, 80, 10, .dark_gray);
    }
}
/*******************************************************************************************
*
*   raylib [core] example - 3d camera free
*
*   Example complexity rating: [★☆☆☆] 1/4
*
*   Example originally created with raylib 1.3, last time updated with raylib 1.3
*
*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
*   BSD-like license that allows static linking with closed source software
*
*   Copyright (c) 2015-2025 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d camera free");

    // Define the camera to look into our 3d world
    Camera3D camera = { 0 };
    camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
    camera.fovy = 45.0f;                                // Camera field-of-view Y
    camera.projection = CAMERA_PERSPECTIVE;             // Camera projection type

    Vector3 cubePosition = { 0.0f, 0.0f, 0.0f };

    DisableCursor();                    // Limit cursor to relative movement inside the window

    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())        // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdateCamera(&camera, CAMERA_FREE);

        if (IsKeyPressed(KEY_Z)) camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            BeginMode3D(camera);

                DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
                DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);

                DrawGrid(10, 1.0f);

            EndMode3D();

            DrawRectangle( 10, 10, 320, 93, Fade(SKYBLUE, 0.5f));
            DrawRectangleLines( 10, 10, 320, 93, BLUE);

            DrawText("Free camera default controls:", 20, 20, 10, BLACK);
            DrawText("- Mouse Wheel to Zoom in-out", 40, 40, 10, DARKGRAY);
            DrawText("- Mouse Wheel Pressed to Pan", 40, 60, 10, DARKGRAY);
            DrawText("- Z to zoom to (0, 0, 0)", 40, 80, 10, DARKGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}

From raylib 6.2. The original on GitHub.