1/*******************************************************************************************
2*
3* raylib [core] example - Picking in 3d mode
4*
5* This example has been created using raylib 1.3 (www.raylib.com)
6* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
7*
8* Copyright (c) 2015 Ramon Santamaria (@raysan5)
9*
10********************************************************************************************/
11
12#include "raylib.h"
13
14int main(void)
15{
16 // Initialization
17 //--------------------------------------------------------------------------------------
18 const int screenWidth = 800;
19 const int screenHeight = 450;
20
21 InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking");
22
23 // Define the camera to look into our 3d world
24 Camera camera = { 0 };
25 camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
26 camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point
27 camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
28 camera.fovy = 45.0f; // Camera field-of-view Y
29 camera.type = CAMERA_PERSPECTIVE; // Camera mode type
30
31 Vector3 cubePosition = { 0.0f, 1.0f, 0.0f };
32 Vector3 cubeSize = { 2.0f, 2.0f, 2.0f };
33
34 Ray ray = { 0 }; // Picking line ray
35
36 bool collision = false;
37
38 SetCameraMode(camera, CAMERA_FREE); // Set a free camera mode
39
40 SetTargetFPS(60); // Set our game to run at 60 frames-per-second
41 //--------------------------------------------------------------------------------------
42
43 // Main game loop
44 while (!WindowShouldClose()) // Detect window close button or ESC key
45 {
46 // Update
47 //----------------------------------------------------------------------------------
48 UpdateCamera(&camera); // Update camera
49
50 if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
51 {
52 if (!collision)
53 {
54 ray = GetMouseRay(GetMousePosition(), camera);
55
56 // Check collision between ray and box
57 collision = CheckCollisionRayBox(ray,
58 (BoundingBox){(Vector3){ cubePosition.x - cubeSize.x/2, cubePosition.y - cubeSize.y/2, cubePosition.z - cubeSize.z/2 },
59 (Vector3){ cubePosition.x + cubeSize.x/2, cubePosition.y + cubeSize.y/2, cubePosition.z + cubeSize.z/2 }});
60 }
61 else collision = false;
62 }
63 //----------------------------------------------------------------------------------
64
65 // Draw
66 //----------------------------------------------------------------------------------
67 BeginDrawing();
68
69 ClearBackground(RAYWHITE);
70
71 BeginMode3D(camera);
72
73 if (collision)
74 {
75 DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, RED);
76 DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, MAROON);
77
78 DrawCubeWires(cubePosition, cubeSize.x + 0.2f, cubeSize.y + 0.2f, cubeSize.z + 0.2f, GREEN);
79 }
80 else
81 {
82 DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, GRAY);
83 DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, DARKGRAY);
84 }
85
86 DrawRay(ray, MAROON);
87 DrawGrid(10, 1.0f);
88
89 EndMode3D();
90
91 DrawText("Try selecting the box with mouse!", 240, 10, 20, DARKGRAY);
92
93 if(collision) DrawText("BOX SELECTED", (screenWidth - MeasureText("BOX SELECTED", 30)) / 2, screenHeight * 0.1f, 30, GREEN);
94
95 DrawFPS(10, 10);
96
97 EndDrawing();
98 //----------------------------------------------------------------------------------
99 }
100
101 // De-Initialization
102 //--------------------------------------------------------------------------------------
103 CloseWindow(); // Close window and OpenGL context
104 //--------------------------------------------------------------------------------------
105
106 return 0;
107}
108