REXM: RENAME: example: shaders_lightmap --> shaders_lightmap_rendering

examples/Makefile

@@ -635,7 +635,7 @@ SHADERS = \
     shaders/shaders_hot_reloading \
     shaders/shaders_hybrid_rendering \
     shaders/shaders_julia_set \
-    shaders/shaders_lightmap \
+    shaders/shaders_lightmap_rendering \
     shaders/shaders_mesh_instancing \
     shaders/shaders_model_shader \
     shaders/shaders_multi_sample2d \

examples/Makefile.Web

@@ -635,7 +635,7 @@ SHADERS = \
     shaders/shaders_hot_reloading \
     shaders/shaders_hybrid_rendering \
     shaders/shaders_julia_set \
-    shaders/shaders_lightmap \
+    shaders/shaders_lightmap_rendering \
     shaders/shaders_mesh_instancing \
     shaders/shaders_model_shader \
     shaders/shaders_multi_sample2d \
@@ -1180,7 +1180,7 @@ shaders/shaders_julia_set: shaders/shaders_julia_set.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) \
     --preload-file shaders/resources/shaders/glsl100/julia_set.fs@resources/shaders/glsl100/julia_set.fs
 
-shaders/shaders_lightmap: shaders/shaders_lightmap.c
+shaders/shaders_lightmap_rendering: shaders/shaders_lightmap_rendering.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) \
     --preload-file shaders/resources/shaders/glsl100/lightmap.vs@resources/shaders/glsl100/lightmap.vs \
     --preload-file shaders/resources/shaders/glsl100/lightmap.fs@resources/shaders/glsl100/lightmap.fs \

examples/README.md

@@ -203,7 +203,7 @@ Examples using raylib shaders functionality, including shaders loading, paramete
 | [shaders_vertex_displacement](shaders/shaders_vertex_displacement.c) | <img src="shaders/shaders_vertex_displacement.png" alt="shaders_vertex_displacement" width="80"> | ⭐⭐⭐☆ | 5.0 | 4.5 | [Alex ZH](https://github.com/ZzzhHe) |
 | [shaders_write_depth](shaders/shaders_write_depth.c) | <img src="shaders/shaders_write_depth.png" alt="shaders_write_depth" width="80"> | ⭐⭐☆☆ | 4.2 | 4.2 | [Buğra Alptekin Sarı](https://github.com/BugraAlptekinSari) |
 | [shaders_basic_pbr](shaders/shaders_basic_pbr.c) | <img src="shaders/shaders_basic_pbr.png" alt="shaders_basic_pbr" width="80"> | ⭐⭐⭐⭐️ | 5.0 | 5.5 | [Afan OLOVCIC](https://github.com/_DevDad) |
-| [shaders_lightmap](shaders/shaders_lightmap.c) | <img src="shaders/shaders_lightmap.png" alt="shaders_lightmap" width="80"> | ⭐⭐⭐☆ | 4.5 | 4.5 | [Jussi Viitala](https://github.com/nullstare) |
+| [shaders_lightmap_rendering](shaders/shaders_lightmap_rendering.c) | <img src="shaders/shaders_lightmap_rendering.png" alt="shaders_lightmap_rendering" width="80"> | ⭐⭐⭐☆ | 4.5 | 4.5 | [Jussi Viitala](https://github.com/nullstare) |
 | [shaders_rounded_rectangle](shaders/shaders_rounded_rectangle.c) | <img src="shaders/shaders_rounded_rectangle.png" alt="shaders_rounded_rectangle" width="80"> | ⭐⭐⭐☆ | 5.5 | 5.5 | [Anstro Pleuton](https://github.com/anstropleuton) |
 | [shaders_view_depth](shaders/shaders_view_depth.c) | <img src="shaders/shaders_view_depth.png" alt="shaders_view_depth" width="80"> | ⭐⭐⭐☆ | 5.6-dev | 5.6-dev | [Luís Almeida](https://github.com/luis605) |
 

examples/examples_list.txt

@@ -150,7 +150,7 @@ shaders;shaders_shadowmap_rendering;★★★★;5.0;5.0;2023;2025;"TheManTheMyt
 shaders;shaders_vertex_displacement;★★★☆;5.0;4.5;2023;2025;"Alex ZH";@ZzzhHe
 shaders;shaders_write_depth;★★☆☆;4.2;4.2;2022;2025;"Buğra Alptekin Sarı";@BugraAlptekinSari
 shaders;shaders_basic_pbr;★★★★;5.0;5.5;2023;2025;"Afan OLOVCIC";@_DevDad
-shaders;shaders_lightmap;★★★☆;4.5;4.5;2019;2025;"Jussi Viitala";@nullstare
+shaders;shaders_lightmap_rendering;★★★☆;4.5;4.5;2019;2025;"Jussi Viitala";@nullstare
 shaders;shaders_rounded_rectangle;★★★☆;5.5;5.5;2025;2025;"Anstro Pleuton";@anstropleuton
 shaders;shaders_view_depth;★★★☆;5.6-dev;5.6-dev;2025;2025;"Luís Almeida";@luis605
 audio;audio_module_playing;★☆☆☆;1.5;3.5;2016;2025;"Ramon Santamaria";@raysan5

examples/shaders/shaders_lightmap_rendering.c

@@ -0,0 +1,178 @@
+/*******************************************************************************************
+*
+*   raylib [shaders] example - lightmap
+*
+*   Example complexity rating: [★★★☆] 3/4
+*
+*   NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
+*         OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version
+*
+*   NOTE: Shaders used in this example are #version 330 (OpenGL 3.3)
+*
+*   Example originally created with raylib 4.5, last time updated with raylib 4.5
+*
+*   Example contributed by Jussi Viitala (@nullstare) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2019-2025 Jussi Viitala (@nullstare) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "raylib.h"
+#include "raymath.h"
+#include "rlgl.h"
+
+#if defined(PLATFORM_DESKTOP)
+    #define GLSL_VERSION            330
+#else   // PLATFORM_ANDROID, PLATFORM_WEB
+    #define GLSL_VERSION            100
+#endif
+
+#define MAP_SIZE 10
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);  // Enable Multi Sampling Anti Aliasing 4x (if available)
+    InitWindow(screenWidth, screenHeight, "raylib [shaders] example - lightmap");
+
+    // Define the camera to look into our 3d world
+    Camera camera = { 0 };
+    camera.position = (Vector3){ 4.0f, 6.0f, 8.0f };    // Camera position
+    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                // Camera field-of-view Y
+    camera.projection = CAMERA_PERSPECTIVE;             // Camera projection type
+
+    Mesh mesh = GenMeshPlane((float)MAP_SIZE, (float)MAP_SIZE, 1, 1);
+
+    // GenMeshPlane doesn't generate texcoords2 so we will upload them separately
+    mesh.texcoords2 = (float *)RL_MALLOC(mesh.vertexCount*2*sizeof(float));
+
+    // X                          // Y
+    mesh.texcoords2[0] = 0.0f;    mesh.texcoords2[1] = 0.0f;
+    mesh.texcoords2[2] = 1.0f;    mesh.texcoords2[3] = 0.0f;
+    mesh.texcoords2[4] = 0.0f;    mesh.texcoords2[5] = 1.0f;
+    mesh.texcoords2[6] = 1.0f;    mesh.texcoords2[7] = 1.0f;
+
+    // Load a new texcoords2 attributes buffer
+    mesh.vboId[SHADER_LOC_VERTEX_TEXCOORD02] = rlLoadVertexBuffer(mesh.texcoords2, mesh.vertexCount*2*sizeof(float), false);
+    rlEnableVertexArray(mesh.vaoId);
+
+    // Index 5 is for texcoords2
+    rlSetVertexAttribute(5, 2, RL_FLOAT, 0, 0, 0);
+    rlEnableVertexAttribute(5);
+    rlDisableVertexArray();
+
+    // Load lightmap shader
+    Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lightmap.vs", GLSL_VERSION),
+                               TextFormat("resources/shaders/glsl%i/lightmap.fs", GLSL_VERSION));
+
+    Texture texture = LoadTexture("resources/cubicmap_atlas.png");
+    Texture light = LoadTexture("resources/spark_flame.png");
+
+    GenTextureMipmaps(&texture);
+    SetTextureFilter(texture, TEXTURE_FILTER_TRILINEAR);
+
+    RenderTexture lightmap = LoadRenderTexture(MAP_SIZE, MAP_SIZE);
+
+    SetTextureFilter(lightmap.texture, TEXTURE_FILTER_TRILINEAR);
+
+    Material material = LoadMaterialDefault();
+    material.shader = shader;
+    material.maps[MATERIAL_MAP_ALBEDO].texture = texture;
+    material.maps[MATERIAL_MAP_METALNESS].texture = lightmap.texture;
+
+    // Drawing to lightmap
+    BeginTextureMode(lightmap);
+        ClearBackground(BLACK);
+
+        BeginBlendMode(BLEND_ADDITIVE);
+            DrawTexturePro(
+                light,
+                (Rectangle){ 0, 0, light.width, light.height },
+                (Rectangle){ 0, 0, 20, 20 },
+                (Vector2){ 10.0, 10.0 },
+                0.0,
+                RED
+            );
+            DrawTexturePro(
+                light,
+                (Rectangle){ 0, 0, light.width, light.height },
+                (Rectangle){ 8, 4, 20, 20 },
+                (Vector2){ 10.0, 10.0 },
+                0.0,
+                BLUE
+            );
+            DrawTexturePro(
+                light,
+                (Rectangle){ 0, 0, light.width, light.height },
+                (Rectangle){ 8, 8, 10, 10 },
+                (Vector2){ 5.0, 5.0 },
+                0.0,
+                GREEN
+            );
+        BeginBlendMode(BLEND_ALPHA);
+    EndTextureMode();
+
+    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())        // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateCamera(&camera, CAMERA_ORBITAL);
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+                DrawMesh(mesh, material, MatrixIdentity());
+            EndMode3D();
+
+            DrawFPS(10, 10);
+
+            DrawTexturePro(
+                lightmap.texture,
+                (Rectangle){ 0, 0, -MAP_SIZE, -MAP_SIZE },
+                (Rectangle){ GetRenderWidth() - MAP_SIZE*8 - 10, 10, MAP_SIZE*8, MAP_SIZE*8 },
+                (Vector2){ 0.0, 0.0 },
+                0.0,
+                WHITE);
+
+            DrawText("lightmap", GetRenderWidth() - 66, 16 + MAP_SIZE*8, 10, GRAY);
+            DrawText("10x10 pixels", GetRenderWidth() - 76, 30 + MAP_SIZE*8, 10, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadMesh(mesh);       // Unload the mesh
+    UnloadShader(shader);   // Unload shader
+    UnloadTexture(texture); // Unload texture
+    UnloadTexture(light);   // Unload texture
+
+    CloseWindow();          // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}