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/*******************************************************************************************
*
* raylib [models] example - Skybox loading and drawing
*
* This example has been created using raylib 3.5 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2017-2020 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#include "rlgl.h"
bool useHDR = false;
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [models] example - skybox loading and drawing");
// Define the camera to look into our 3d world
Camera camera = { { 1.0f, 1.0f, 1.0f }, { 4.0f, 1.0f, 4.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
// Load skybox model
Mesh cube = GenMeshCube(1.0f, 1.0f, 1.0f);
Model skybox = LoadModelFromMesh(cube);
// Load skybox shader and set required locations
// NOTE: Some locations are automatically set at shader loading
#if defined(PLATFORM_DESKTOP)
skybox.materials[0].shader = LoadShader("resources/shaders/glsl330/skybox.vs", "resources/shaders/glsl330/skybox.fs");
#else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB
skybox.materials[0].shader = LoadShader("resources/shaders/glsl100/skybox.vs", "resources/shaders/glsl100/skybox.fs");
#endif
SetShaderValue(skybox.materials[0].shader, GetShaderLocation(skybox.materials[0].shader, "environmentMap"), (int[1]){ MATERIAL_MAP_CUBEMAP }, SHADER_UNIFORM_INT);
SetShaderValue(skybox.materials[0].shader, GetShaderLocation(skybox.materials[0].shader, "doGamma"), (int[1]) { useHDR ? 1 : 0 }, SHADER_UNIFORM_INT);
SetShaderValue(skybox.materials[0].shader, GetShaderLocation(skybox.materials[0].shader, "vflipped"), (int[1]){ useHDR ? 1 : 0 }, SHADER_UNIFORM_INT);
// Load cubemap shader and setup required shader locations
#if defined(PLATFORM_DESKTOP)
Shader shdrCubemap = LoadShader("resources/shaders/glsl330/cubemap.vs", "resources/shaders/glsl330/cubemap.fs");
#else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB
Shader shdrCubemap = LoadShader("resources/shaders/glsl100/cubemap.vs", "resources/shaders/glsl100/cubemap.fs");
#endif
SetShaderValue(shdrCubemap, GetShaderLocation(shdrCubemap, "equirectangularMap"), (int[1]){ 0 }, SHADER_UNIFORM_INT);
char skyboxFileName[256] = { 0 };
if (useHDR)
{
TextCopy(skyboxFileName, "resources/dresden_square_2k.hdr");
// Load HDR panorama (sphere) texture
Texture2D panorama = panorama = LoadTexture(skyboxFileName);
// Generate cubemap (texture with 6 quads-cube-mapping) from panorama HDR texture
// NOTE 1: New texture is generated rendering to texture, shader calculates the sphere->cube coordinates mapping
// NOTE 2: It seems on some Android devices WebGL, fbo does not properly support a FLOAT-based attachment,
// despite texture can be successfully created.. so using PIXELFORMAT_UNCOMPRESSED_R8G8B8A8 instead of PIXELFORMAT_UNCOMPRESSED_R32G32B32A32
skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = GenTextureCubemap(shdrCubemap, panorama, 1024, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8);
UnloadTexture(panorama); // Texture not required anymore, cubemap already generated
}
else
{
Image img = LoadImage("resources/skybox.png");
skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = LoadTextureCubemap(img, CUBEMAP_LAYOUT_AUTO_DETECT); // CUBEMAP_LAYOUT_PANORAMA
UnloadImage(img);
}
SetCameraMode(camera, CAMERA_FIRST_PERSON); // Set a first person 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
// Load new cubemap texture on drag&drop
if (IsFileDropped())
{
int count = 0;
char **droppedFiles = GetDroppedFiles(&count);
if (count == 1) // Only support one file dropped
{
if (IsFileExtension(droppedFiles[0], ".png;.jpg;.hdr;.bmp;.tga"))
{
// Unload current cubemap texture and load new one
UnloadTexture(skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture);
if (useHDR)
{
Texture2D panorama = LoadTexture(droppedFiles[0]);
// Generate cubemap from panorama texture
skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = GenTextureCubemap(shdrCubemap, panorama, 1024, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8);
UnloadTexture(panorama);
}
else
{
Image img = LoadImage(droppedFiles[0]);
skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = LoadTextureCubemap(img, CUBEMAP_LAYOUT_AUTO_DETECT);
UnloadImage(img);
}
TextCopy(skyboxFileName, droppedFiles[0]);
}
}
ClearDroppedFiles(); // Clear internal buffers
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginMode3D(camera);
// We are inside the cube, we need to disable backface culling!
rlDisableBackfaceCulling();
rlDisableDepthMask();
DrawModel(skybox, (Vector3){0, 0, 0}, 1.0f, WHITE);
rlEnableBackfaceCulling();
rlEnableDepthMask();
DrawGrid(10, 1.0f);
EndMode3D();
if (useHDR)
DrawText(TextFormat("Panorama image from hdrihaven.com: %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
else
DrawText(TextFormat(": %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(skybox.materials[0].shader);
UnloadTexture(skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture);
UnloadModel(skybox); // Unload skybox model
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
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