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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).
*
* This example has been created using raylib 3.8 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Example contributed by Chris Camacho (@codifies, http://bedroomcoders.co.uk/) and
* reviewed by Ramon Santamaria (@raysan5)
*
* Copyright (c) 2019-2021 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_RPI, 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 mode type
// Load plane model from a generated mesh
Model model = LoadModelFromMesh(GenMeshPlane(10.0f, 10.0f, 3, 3));
Model cube = LoadModelFromMesh(GenMeshCube(2.0f, 4.0f, 2.0f));
Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/base_lighting.vs", GLSL_VERSION),
TextFormat("resources/shaders/glsl%i/lighting.fs", GLSL_VERSION));
// Get some required shader loactions
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);
// Assign out lighting shader to model
model.materials[0].shader = shader;
cube.materials[0].shader = shader;
// Using 4 point lights: gold, red, green and blue
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);
SetCameraMode(camera, CAMERA_ORBITAL); // Set an orbital camera mode
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); // Update camera
// 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)
UpdateLightValues(shader, lights[0]);
UpdateLightValues(shader, lights[1]);
UpdateLightValues(shader, lights[2]);
UpdateLightValues(shader, lights[3]);
// 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);
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginMode3D(camera);
DrawModel(model, Vector3Zero(), 1.0f, WHITE);
DrawModel(cube, Vector3Zero(), 1.0f, WHITE);
// Draw markers to show where the lights are
if (lights[0].enabled) DrawSphereEx(lights[0].position, 0.2f, 8, 8, YELLOW);
else DrawSphereWires(lights[0].position, 0.2f, 8, 8, ColorAlpha(YELLOW, 0.3f));
if (lights[1].enabled) DrawSphereEx(lights[1].position, 0.2f, 8, 8, RED);
else DrawSphereWires(lights[1].position, 0.2f, 8, 8, ColorAlpha(RED, 0.3f));
if (lights[2].enabled) DrawSphereEx(lights[2].position, 0.2f, 8, 8, GREEN);
else DrawSphereWires(lights[2].position, 0.2f, 8, 8, ColorAlpha(GREEN, 0.3f));
if (lights[3].enabled) DrawSphereEx(lights[3].position, 0.2f, 8, 8, BLUE);
else DrawSphereWires(lights[3].position, 0.2f, 8, 8, ColorAlpha(BLUE, 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
//--------------------------------------------------------------------------------------
UnloadModel(model); // Unload the model
UnloadModel(cube); // Unload the model
UnloadShader(shader); // Unload shader
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
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