raylib/ports/core/core_world_screen

Source

core_world_screen.odin ¶

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1/*******************************************************************************************
2*
3*   raylib [core] example - world screen
4*
5*   Example complexity rating: [★★☆☆] 2/4
6*
7*   Example originally created with raylib 1.3, last time updated with raylib 1.4
8*
9*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
10*   BSD-like license that allows static linking with closed source software
11*
12*   Copyright (c) 2015-2025 Ramon Santamaria (@raysan5)
13*
14********************************************************************************************/
15
16package raylib_examples
17
18import rl "vendor:raylib"
19
20//------------------------------------------------------------------------------------
21// Program main entry point
22//------------------------------------------------------------------------------------
23main :: proc() {
24	// Initialization
25	//--------------------------------------------------------------------------------------
26	SCREEN_WIDTH :: 800
27	SCREEN_HEIGHT :: 450
28
29	rl.InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "raylib [core] example - world screen")
30
31	// Define the camera to look into our 3d world
32	camera := rl.Camera {
33		position = {10, 10, 10}, // Camera position
34		//target = {0, 0, 0},      // Camera looking at point
35		up = {0, 1, 0},          // Camera up vector (rotation towards target)
36		fovy = 45,                                // Camera field-of-view Y
37		projection = .PERSPECTIVE,             // Camera projection type
38	}
39
40	cube_position: rl.Vector3
41	cube_screen_position: rl.Vector2
42
43	rl.DisableCursor()                    // Limit cursor to relative movement inside the window
44
45	rl.SetTargetFPS(60)                   // Set our game to run at 60 frames-per-second
46	//--------------------------------------------------------------------------------------
47
48	// Main game loop
49	for !rl.WindowShouldClose() {        // Detect window close button or ESC key
50		// Update
51		//----------------------------------------------------------------------------------
52		rl.UpdateCamera(&camera, .THIRD_PERSON)
53
54		// Calculate cube screen space position (with a little offset to be in top)
55		cube_screen_position = rl.GetWorldToScreen({cube_position.x, cube_position.y + 2.5, cube_position.z}, camera)
56		//----------------------------------------------------------------------------------
57
58		// Draw
59		//----------------------------------------------------------------------------------
60		rl.BeginDrawing()
61
62			rl.ClearBackground(rl.RAYWHITE)
63
64			rl.BeginMode3D(camera)
65
66				rl.DrawCube(cube_position, 2, 2, 2, rl.RED)
67				rl.DrawCubeWires(cube_position, 2, 2, 2, rl.MAROON)
68
69				rl.DrawGrid(10, 1)
70
71			rl.EndMode3D()
72
73			rl.DrawText("Enemy: 100/100", i32(cube_screen_position.x - f32(rl.MeasureText("Enemy: 100/100", 20)/2)), i32(cube_screen_position.y), 20, rl.BLACK)
74
75			rl.DrawText(rl.TextFormat("Cube position in screen space coordinates: [%i, %i]", i32(cube_screen_position.x), i32(cube_screen_position.y)), 10, 10, 20, rl.LIME)
76			rl.DrawText("Text 2d should be always on top of the cube", 10, 40, 20, rl.GRAY)
77
78		rl.EndDrawing()
79		//----------------------------------------------------------------------------------
80	}
81
82	// De-Initialization
83	//--------------------------------------------------------------------------------------
84	rl.CloseWindow()        // Close window and OpenGL context
85	//--------------------------------------------------------------------------------------
86}