1+ /*******************************************************************************************
2+ *
3+ * raylib [shader] example - render depth texture
4+ *
5+ * Example complexity rating: [★★★☆] 3/4
6+ *
7+ * Example originally created with raylib 5.6-dev, last time updated with raylib 5.6-dev
8+ *
9+ * Example contributed by Luís Almeida (@luis605)
10+ *
11+ * Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
12+ * BSD-like license that allows static linking with closed source software
13+ *
14+ * Copyright (c) 2025 Luís Almeida (@luis605)
15+ *
16+ ********************************************************************************************/
17+
18+ #include "raylib.h"
19+ #include "rlgl.h"
20+
21+ #if defined(PLATFORM_DESKTOP )
22+ #define GLSL_VERSION 330
23+ #else // PLATFORM_ANDROID, PLATFORM_WEB
24+ #define GLSL_VERSION 100
25+ #endif
26+
27+ RenderTexture2D LoadRenderTextureWithDepth (int width , int height );
28+
29+ //------------------------------------------------------------------------------------
30+ // Program main entry point
31+ //------------------------------------------------------------------------------------
32+ int main (void )
33+ {
34+ // Initialization
35+ //--------------------------------------------------------------------------------------
36+ const int screenWidth = 800 ;
37+ const int screenHeight = 600 ;
38+
39+ InitWindow (screenWidth , screenHeight , "raylib [shader] example - render depth texture" );
40+
41+ // Load camera
42+ Camera camera = { 0 };
43+ camera .position = (Vector3 ){ 4.0f , 1.0f , 5.0f };
44+ camera .target = (Vector3 ){ 0.0f , 0.0f , 0.0f };
45+ camera .up = (Vector3 ){ 0.0f , 1.0f , 0.0f };
46+ camera .fovy = 45.0f ;
47+ camera .projection = CAMERA_PERSPECTIVE ;
48+
49+ // Load an empty render texture with a depth texture
50+ RenderTexture2D target = LoadRenderTextureWithDepth (screenWidth , screenHeight );
51+
52+ // Load depth shader and get depth texture shader location
53+ Shader depthShader = LoadShader (0 , TextFormat ("resources/shaders/glsl%i/depth.fs" , GLSL_VERSION ));
54+ int depthLoc = GetShaderLocation (depthShader , "depthTexture" );
55+ int flipTextureLoc = GetShaderLocation (depthShader , "flipY" );
56+ SetShaderValue (depthShader , flipTextureLoc , (int []){ 1 }, SHADER_UNIFORM_INT ); // Flip Y texture
57+
58+ // Load models
59+ Model cube = LoadModelFromMesh (GenMeshCube (1.0f , 1.0f , 1.0f ));
60+ Model floor = LoadModelFromMesh (GenMeshPlane (20.0f , 20.0f , 1 , 1 ));
61+
62+ DisableCursor (); // Limit cursor to relative movement inside the window
63+
64+ SetTargetFPS (60 ); // Set our game to run at 60 frames-per-second
65+ //--------------------------------------------------------------------------------------
66+
67+ // Main game loop
68+ while (!WindowShouldClose ()) // Detect window close button or ESC key
69+ {
70+ // Update
71+ //----------------------------------------------------------------------------------
72+ UpdateCamera (& camera , CAMERA_FREE );
73+ //----------------------------------------------------------------------------------
74+
75+ // Draw
76+ //----------------------------------------------------------------------------------
77+ BeginTextureMode (target );
78+
79+ ClearBackground (WHITE );
80+
81+ BeginMode3D (camera );
82+
83+ DrawModel (cube , (Vector3 ){ 0.0f , 0.0f , 0.0f }, 3.0f , YELLOW );
84+ DrawModel (floor , (Vector3 ){ 10.0f , 0.0f , 2.0f }, 2.0f , RED );
85+
86+ EndMode3D ();
87+
88+ EndTextureMode ();
89+
90+ BeginDrawing ();
91+
92+ BeginShaderMode (depthShader );
93+
94+ SetShaderValueTexture (depthShader , depthLoc , target .depth );
95+ DrawTexture (target .depth , 0 , 0 , WHITE );
96+
97+ EndShaderMode ();
98+
99+ DrawRectangle ( 10 , 10 , 320 , 93 , Fade (SKYBLUE , 0.5f ));
100+ DrawRectangleLines ( 10 , 10 , 320 , 93 , BLUE );
101+
102+ DrawText ("Camera Controls:" , 20 , 20 , 10 , BLACK );
103+ DrawText ("- WASD to move" , 40 , 40 , 10 , DARKGRAY );
104+ DrawText ("- Mouse Wheel Pressed to Pan" , 40 , 60 , 10 , DARKGRAY );
105+ DrawText ("- Z to zoom to (0, 0, 0)" , 40 , 80 , 10 , DARKGRAY );
106+
107+ EndDrawing ();
108+ //----------------------------------------------------------------------------------
109+ }
110+
111+ // De-Initialization
112+ //--------------------------------------------------------------------------------------
113+ UnloadModel (cube ); // Unload model
114+ UnloadModel (floor ); // Unload model
115+ UnloadRenderTexture (target ); // Unload render texture
116+ UnloadShader (depthShader ); // Unload shader
117+
118+ CloseWindow (); // Close window and OpenGL context
119+ //--------------------------------------------------------------------------------------
120+ return 0 ;
121+ }
122+
123+ RenderTexture2D LoadRenderTextureWithDepth (int width , int height )
124+ {
125+ RenderTexture2D target = {0 };
126+
127+ target .id = rlLoadFramebuffer (); // Load an empty framebuffer
128+
129+ if (target .id > 0 )
130+ {
131+ rlEnableFramebuffer (target .id );
132+
133+ // Create color texture (default to RGBA)
134+ target .texture .id = rlLoadTexture (0 , width , height , PIXELFORMAT_UNCOMPRESSED_R8G8B8A8 , 1 );
135+ target .texture .width = width ;
136+ target .texture .height = height ;
137+ target .texture .format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8 ;
138+ target .texture .mipmaps = 1 ;
139+
140+ // Create depth texture
141+ target .depth .id = rlLoadTextureDepth (width , height , false);
142+ target .depth .width = width ;
143+ target .depth .height = height ;
144+ target .depth .format = 19 ; //DEPTH_COMPONENT_24BIT? THIS DOESN'T EXIST IN RAYLIB
145+ target .depth .mipmaps = 1 ;
146+
147+ // Attach color texture and depth texture to FBO
148+ rlFramebufferAttach (target .id , target .texture .id , RL_ATTACHMENT_COLOR_CHANNEL0 , RL_ATTACHMENT_TEXTURE2D , 0 );
149+ rlFramebufferAttach (target .id , target .depth .id , RL_ATTACHMENT_DEPTH , RL_ATTACHMENT_TEXTURE2D , 0 );
150+
151+ // Check if fbo is complete with attachments (valid)
152+ if (rlFramebufferComplete (target .id )) TRACELOG (LOG_INFO , "FBO: [ID %i] Framebuffer object created successfully" , target .id );
153+
154+ rlDisableFramebuffer ();
155+ }
156+ else TRACELOG (LOG_WARNING , "FBO: Framebuffer object can not be created" );
157+
158+ return target ;
159+ }
0 commit comments