1/*******************************************************************************************
2*
3* raylib [core] example - World to screen
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 camera free");
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 };
26 camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };
27 camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };
28 camera.fovy = 45.0f;
29 camera.type = CAMERA_PERSPECTIVE;
30
31 Vector3 cubePosition = { 0.0f, 0.0f, 0.0f };
32 Vector2 cubeScreenPosition = { 0.0f, 0.0f };
33
34 SetCameraMode(camera, CAMERA_FREE); // Set a free camera mode
35
36 SetTargetFPS(60); // Set our game to run at 60 frames-per-second
37 //--------------------------------------------------------------------------------------
38
39 // Main game loop
40 while (!WindowShouldClose()) // Detect window close button or ESC key
41 {
42 // Update
43 //----------------------------------------------------------------------------------
44 UpdateCamera(&camera); // Update camera
45
46 // Calculate cube screen space position (with a little offset to be in top)
47 cubeScreenPosition = GetWorldToScreen((Vector3){cubePosition.x, cubePosition.y + 2.5f, cubePosition.z}, camera);
48 //----------------------------------------------------------------------------------
49
50 // Draw
51 //----------------------------------------------------------------------------------
52 BeginDrawing();
53
54 ClearBackground(RAYWHITE);
55
56 BeginMode3D(camera);
57
58 DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
59 DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);
60
61 DrawGrid(10, 1.0f);
62
63 EndMode3D();
64
65 DrawText("Enemy: 100 / 100", cubeScreenPosition.x - MeasureText("Enemy: 100/100", 20)/2, cubeScreenPosition.y, 20, BLACK);
66 DrawText("Text is always on top of the cube", (screenWidth - MeasureText("Text is always on top of the cube", 20))/2, 25, 20, GRAY);
67
68 EndDrawing();
69 //----------------------------------------------------------------------------------
70 }
71
72 // De-Initialization
73 //--------------------------------------------------------------------------------------
74 CloseWindow(); // Close window and OpenGL context
75 //--------------------------------------------------------------------------------------
76
77 return 0;
78}