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authorbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
committerbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
commitcdda4c4182c9ee068567529715e4a5c68a8efb58 (patch)
tree38a63f62a64018a2d35fc33354f8589fd33b7514 /deps/raylib/examples/shaders/shaders_basic_lighting.c
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+/*******************************************************************************************
+*
+* raylib [shaders] example - basic lighting
+*
+* 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 3.0, last time updated with raylib 4.2
+*
+* Example contributed by Chris Camacho (@codifies) 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) 2019-2024 Chris Camacho (@codifies) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include "raymath.h"
+
+#define RLIGHTS_IMPLEMENTATION
+#include "rlights.h"
+
+#if defined(PLATFORM_DESKTOP)
+ #define GLSL_VERSION 330
+#else // PLATFORM_ANDROID, PLATFORM_WEB
+ #define GLSL_VERSION 100
+#endif
+
+//------------------------------------------------------------------------------------
+// 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 - basic lighting");
+
+ // Define the camera to look into our 3d world
+ Camera camera = { 0 };
+ camera.position = (Vector3){ 2.0f, 4.0f, 6.0f }; // Camera position
+ camera.target = (Vector3){ 0.0f, 0.5f, 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
+
+ // Load basic lighting shader
+ Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lighting.vs", GLSL_VERSION),
+ TextFormat("resources/shaders/glsl%i/lighting.fs", GLSL_VERSION));
+ // Get some required shader locations
+ shader.locs[SHADER_LOC_VECTOR_VIEW] = GetShaderLocation(shader, "viewPos");
+ // NOTE: "matModel" location name is automatically assigned on shader loading,
+ // no need to get the location again if using that uniform name
+ //shader.locs[SHADER_LOC_MATRIX_MODEL] = GetShaderLocation(shader, "matModel");
+
+ // Ambient light level (some basic lighting)
+ int ambientLoc = GetShaderLocation(shader, "ambient");
+ SetShaderValue(shader, ambientLoc, (float[4]){ 0.1f, 0.1f, 0.1f, 1.0f }, SHADER_UNIFORM_VEC4);
+
+ // Create lights
+ Light lights[MAX_LIGHTS] = { 0 };
+ lights[0] = CreateLight(LIGHT_POINT, (Vector3){ -2, 1, -2 }, Vector3Zero(), YELLOW, shader);
+ lights[1] = CreateLight(LIGHT_POINT, (Vector3){ 2, 1, 2 }, Vector3Zero(), RED, shader);
+ lights[2] = CreateLight(LIGHT_POINT, (Vector3){ -2, 1, 2 }, Vector3Zero(), GREEN, shader);
+ lights[3] = CreateLight(LIGHT_POINT, (Vector3){ 2, 1, -2 }, Vector3Zero(), BLUE, shader);
+
+ 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);
+
+ // Update the shader with the camera view vector (points towards { 0.0f, 0.0f, 0.0f })
+ float cameraPos[3] = { camera.position.x, camera.position.y, camera.position.z };
+ SetShaderValue(shader, shader.locs[SHADER_LOC_VECTOR_VIEW], cameraPos, SHADER_UNIFORM_VEC3);
+
+ // Check key inputs to enable/disable lights
+ if (IsKeyPressed(KEY_Y)) { lights[0].enabled = !lights[0].enabled; }
+ if (IsKeyPressed(KEY_R)) { lights[1].enabled = !lights[1].enabled; }
+ if (IsKeyPressed(KEY_G)) { lights[2].enabled = !lights[2].enabled; }
+ if (IsKeyPressed(KEY_B)) { lights[3].enabled = !lights[3].enabled; }
+
+ // Update light values (actually, only enable/disable them)
+ for (int i = 0; i < MAX_LIGHTS; i++) UpdateLightValues(shader, lights[i]);
+ //----------------------------------------------------------------------------------
+
+ // Draw
+ //----------------------------------------------------------------------------------
+ BeginDrawing();
+
+ ClearBackground(RAYWHITE);
+
+ BeginMode3D(camera);
+
+ BeginShaderMode(shader);
+
+ DrawPlane(Vector3Zero(), (Vector2) { 10.0, 10.0 }, WHITE);
+ DrawCube(Vector3Zero(), 2.0, 4.0, 2.0, WHITE);
+
+ EndShaderMode();
+
+ // Draw spheres to show where the lights are
+ for (int i = 0; i < MAX_LIGHTS; i++)
+ {
+ if (lights[i].enabled) DrawSphereEx(lights[i].position, 0.2f, 8, 8, lights[i].color);
+ else DrawSphereWires(lights[i].position, 0.2f, 8, 8, ColorAlpha(lights[i].color, 0.3f));
+ }
+
+ DrawGrid(10, 1.0f);
+
+ EndMode3D();
+
+ DrawFPS(10, 10);
+
+ DrawText("Use keys [Y][R][G][B] to toggle lights", 10, 40, 20, DARKGRAY);
+
+ EndDrawing();
+ //----------------------------------------------------------------------------------
+ }
+
+ // De-Initialization
+ //--------------------------------------------------------------------------------------
+ UnloadShader(shader); // Unload shader
+
+ CloseWindow(); // Close window and OpenGL context
+ //--------------------------------------------------------------------------------------
+
+ return 0;
+}
+