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/*******************************************************************************************
*
* raylib [core] example - Texture source and destination rectangles (adapted for HTML5 platform)
*
* 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;
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Texture2D guybrush;
int frameWidth;
int frameHeight;
Rectangle sourceRec;
Rectangle destRec;
Vector2 origin;
int rotation = 0;
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Main Enry Point
//----------------------------------------------------------------------------------
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] examples - texture source and destination rectangles");
guybrush = LoadTexture("resources/guybrush.png"); // Texture loading
frameWidth = guybrush.width/7;
frameHeight = guybrush.height;
// NOTE: On PLATFORM_WEB, NPOT textures support is limited
// NOTE: Source rectangle (part of the texture to use for drawing)
sourceRec = (Rectangle){ 0, 0, frameWidth, frameHeight };
// NOTE: Destination rectangle (screen rectangle where drawing part of texture)
destRec = (Rectangle){ screenWidth/2, screenHeight/2, frameWidth*2, frameHeight*2 };
// NOTE: Origin of the texture (rotation/scale point), it's relative to destination rectangle size
origin = (Vector2){ frameWidth, frameHeight };
#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
//--------------------------------------------------------------------------------------
UnloadTexture(guybrush); // Texture unloading
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// Update
//----------------------------------------------------------------------------------
rotation++;
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
// NOTE: Using DrawTexturePro() we can easily rotate and scale the part of the texture we draw
// sourceRec defines the part of the texture we use for drawing
// destRec defines the rectangle where our texture part will fit (scaling it to fit)
// origin defines the point of the texture used as reference for rotation and scaling
// rotation defines the texture rotation (using origin as rotation point)
DrawTexturePro(guybrush, sourceRec, destRec, origin, rotation, WHITE);
DrawLine(destRec.x, 0, destRec.x, screenHeight, GRAY);
DrawLine(0, destRec.y, screenWidth, destRec.y, GRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
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