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/*******************************************************************************************
*
* raylib [shaders] example - Apply a postprocessing shader and connect a custom uniform variable (adapted for HTML5 platform)
*
* 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), to test this example
* on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
* raylib comes with shaders ready for both versions, check raylib/shaders install folder
*
* This example has been created using raylib 1.3 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2015 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
// Define the camera to look into our 3d world
Camera camera = {{ 3.0f, 3.0f, 3.0f }, { 0.0f, 1.5f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f };
Model dwarf; // OBJ model
Texture2D texture; // Model texture
Shader shader; // Postpro shader
Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
int swirlCenterLoc;
float swirlCenter[2];
RenderTexture2D target;
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Main Enry Point
//----------------------------------------------------------------------------------
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available)
InitWindow(screenWidth, screenHeight, "raylib [shaders] example - custom uniform variable");
dwarf = LoadModel("resources/model/dwarf.obj"); // Load OBJ model
texture = LoadTexture("resources/model/dwarf_diffuse.png"); // Load model texture
dwarf.material.texDiffuse = texture; // Set dwarf model diffuse texture
shader = LoadShader("resources/shaders/glsl100/base.vs",
"resources/shaders/glsl100/swirl.fs"); // Load postpro shader
// Get variable (uniform) location on the shader to connect with the program
// NOTE: If uniform variable could not be found in the shader, function returns -1
swirlCenterLoc = GetShaderLocation(shader, "center");
swirlCenter[0] = (float)screenWidth/2;
swirlCenter[1] = (float)screenHeight/2;
// Create a RenderTexture2D to be used for render to texture
target = LoadRenderTexture(screenWidth, screenHeight);
// Setup orbital camera
SetCameraMode(CAMERA_ORBITAL); // Set an orbital camera mode
SetCameraPosition(camera.position); // Set internal camera position to match our camera position
SetCameraTarget(camera.target); // Set internal camera target to match our camera target
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(shader); // Unload shader
UnloadTexture(texture); // Unload texture
UnloadModel(dwarf); // Unload model
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// Update
//----------------------------------------------------------------------------------
Vector2 mousePosition = GetMousePosition();
swirlCenter[0] = mousePosition.x;
swirlCenter[1] = screenHeight - mousePosition.y;
// Send new value to the shader to be used on drawing
SetShaderValue(shader, swirlCenterLoc, swirlCenter, 2);
UpdateCamera(&camera); // Update internal camera and our camera
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginTextureMode(target); // Enable drawing to texture
Begin3dMode(camera);
DrawModel(dwarf, position, 2.0f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
End3dMode();
DrawText("TEXT DRAWN IN RENDER TEXTURE", 200, 10, 30, RED);
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
BeginShaderMode(shader);
// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, target.texture.width, -target.texture.height }, (Vector2){ 0, 0 }, WHITE);
EndShaderMode();
DrawText("(c) Dwarf 3D model by David Moreno", screenWidth - 200, screenHeight - 20, 10, GRAY);
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
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