raylib/examples/core_3d_picking.c

/*******************************************************************************************
*
*   raylib [core] example - Picking in 3d mode
*
*   This example has been created using raylib 1.0 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
*
********************************************************************************************/

#include "raylib.h"

int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    int screenWidth = 800;
    int screenHeight = 450;

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

    // Define the camera to look into our 3d world
    Camera camera = {{ 0.0, 10.0, 10.0 }, { 0.0, 0.0, 0.0 }, { 0.0, 1.0, 0.0 }};

    Vector3 cubePosition = { 0.0, 0.0, 0.0 };
    
    Ray pickingLine;
    
    SetCameraMode(CAMERA_FREE);

    SetTargetFPS(60);
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        camera = UpdateCamera(0);
        
        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) pickingLine = GetMouseRay(GetMousePosition(), camera);
        //----------------------------------------------------------------------------------

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

            ClearBackground(RAYWHITE);

            Begin3dMode(camera);

                DrawCube(cubePosition, 2, 2, 2, RED);
                DrawCubeWires(cubePosition, 2, 2, 2, MAROON);

                DrawGrid(10.0, 1.0);
                
                DrawRay(pickingLine, MAROON);

            End3dMode();

            DrawFPS(10, 10);

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

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

    return 0;
}