raylib/examples/textures/textures_srcrec_dstrec.c
2017-04-14 13:58:39 +02:00

81 lines
3.4 KiB
C

/*******************************************************************************************
*
* raylib [textures] example - Texture source and destination rectangles
*
* 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"
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] examples - texture source and destination rectangles");
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Texture2D scarfy = LoadTexture("resources/scarfy.png"); // Texture loading
int frameWidth = scarfy.width/6;
int frameHeight = scarfy.height;
// NOTE: Source rectangle (part of the texture to use for drawing)
Rectangle sourceRec = { 0, 0, frameWidth, frameHeight };
// NOTE: Destination rectangle (screen rectangle where drawing part of texture)
Rectangle destRec = { screenWidth/2, screenHeight/2, frameWidth*2, frameHeight*2 };
// NOTE: Origin of the texture (rotation/scale point), it's relative to destination rectangle size
Vector2 origin = { frameWidth, frameHeight };
int rotation = 0;
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// 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(scarfy, sourceRec, destRec, origin, rotation, WHITE);
DrawLine(destRec.x, 0, destRec.x, screenHeight, GRAY);
DrawLine(0, destRec.y, screenWidth, destRec.y, GRAY);
DrawText("(c) Scarfy sprite by Eiden Marsal", screenWidth - 200, screenHeight - 20, 10, GRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(scarfy); // Texture unloading
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}